De Appel 46.1 - Exploration

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And why we should do it more





Het verenigingsblad van W.S.G. Isaac Newton





We think our profession is the best there is.

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enormous energy. Innovations within the

industry follow at a rapid pace, so there is no

time to stand still for us either. With around

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and experience. We gladly share this with

each other and expand it daily. This is how

we remain leading in our area of expertise.


From our own TCPM Academy, we stimulate

everyone’s ambition and challenge you to

keep growing. Even after your studies.

We ensure that you fully use your unique

talents. It is equally important to us that you

are doing well, that you feel good about

yourself and get satisfaction from your work.

We support you in your personal development

and facilitate you with various learning

programmes, so you can profile yourself via

your own route.


Are you curious about how TCPM can kick-start

your career? And do you want to learn about

the progressive projects you can work on?

Our mechanical engineer Bart Schreurs would

like to take you through his career and work at

TCPM. Watch his video and the stories of

several other TCPM employees via the QR code

or at our website www.werkenbijtcpm.nl.







- mechanical engineer Bart Schreurs


With our expertise in the field of engineering,

project management and industrial safety,

we offer a coherent package of services.

This enables us to provide complete and

integrated solutions for industrial customers.

We do this from our five offices spread

throughout the Netherlands, optionally (partly)

from home or at the customer’s premises.





The first edition of this academic year’s Appel lies before

you, with its focus on Exploration. Within the

pages of this issue, emphasis is placed on the significance

of exploration, both within the academic

sphere and beyond. For some students, this journey

of intellectual and personal discovery was initiated a few

weeks ago, coinciding with the start of the new academic year.

Exploration, it is like the ultimate adventure. It is all about diving

into the unknown, uncovering hidden gems, and just discovering

new things you never even knew existed. Whether it’s trekking

through unexplored jungles or delving into the mysteries of science,

exploration is what keeps you buzzing with excitement. It’s

that itch to see what’s around the next corner, to push boundaries,

and to make sense of this crazy, fascinating universe. Of

course, it is not always an easy ride. There are challenges, obstacles

and moments when you might feel like turning back. But it’s

in those very instances that you find your true strength, your

resilience, and your determination to see things through. Because

at the end of the day, exploration isn’t just about what you

find out there; it’s what you discover within yourself. As I look

back on my journey of exploration, I realise that the most profound

discoveries were not about the external world, but about

the depths of my own strength and curiosity. These realisations

have the power to ignite a similar sense of self-discovery and

wonder within each and every one of us, urging us to embark

on our own journeys of exploration, both within and without.

This Appel will teach you a lot about exploration and how

to take on the adventure. Get ready to immerse yourself

in a thrilling experience that will undoubtedly broaden

your horizons and leave an indelible mark on your personal

and academic journey. So, buckle up, because the journey

of exploration is one wild ride you don’t want to miss!

Veralin Staring

Chairman of W.S.G. Isaac Newton

Ubi Concordia, ibi victoria



De Appel is the periodical of student association

W.S.G. Isaac Newton in collaboration

with the study programme Mechanical

Engineering of the Faculty of Engineering

Technology of the University of Twente.

Editorial Address

Editorial Address

W.S.G. Isaac Newton w.r.t. de Appel

Mailbox 217

7500 AE Enschede

[T] 053 - 489 25 31

[E] appel@isaacnewton.nl


Volume 46, issue 1, December 2023


600 copies


Subscriptions for de Appel are available at

the Board of W.S.G. Isaac Newton at a cost

of 25 euros per year.

© 2023 de Appel

The editors are in no way responsible for

the content of the supplied copy and reserve

the right to shorten and edit a copy.

Chief editor

Roan Spits


Merit Fernhout


Fedde Engelen

Roan Spits

Merit Fernhout


Jan Maarten Schaapman

Leonie Horst

Martijn van de Ven

Roan Spits

Kik Hoekjen

Tijmen Stet


Vanderperk Groep

Van Leeuwenhoekweg 3

2964 LJ Groot-Ammers

Advertisements & Advertorials

p.2 TCPM

p.32 VDL-ETG


The Egg of Colombus:

What would the Egg of

Columbus taste like?


Meet your Teacher:

Mohammed Iqbal Abdul



Exploration of the world

The start of the European

overseas expansion


De Wielen Van:




08 Exploring the ocean


And why we should do it more.

11 Association news

14 Quality Assurance

16 From the Editorial

Join the committee!

17 Oost, west, huis molest

Column Tijmen

28 Weird foods

30 Puzzle

Settlers of Binairo

31 Answers puzzle 45.3

Horst tower puzzle



am delighted to greet you as the new Chief Editor

of de Appel. As the previous Chief Editor, Merit, embarks

on an exciting journey with her PhD, I am honoured

to welcome you to the latest adventure in

the world of Mechanical Engineering, this edition

being the first of this academic year! In this edition,

we are thrilled to delve into the riveting theme of exploration.

While exploration might conjure images of intrepid

adventurers and daring pioneers, let’s not forget the

unsung explorational heroes of another discipline behind

the scenes—our beloved Mechanical Engineers! For you are

about to embark on a literary journey where you will explore

the world, from the seas and the unexplored waters

thereunder to the culinary world far east, but also far west.

we can welcome you to the following work evening. Of course,

attending these working evenings is without obligations and

if it ends up not being something for you, that is totally fine.

In any case, I invite you to turn the page and start your journey

into the unknown!

Roan Spits

Chief Editor

Of course, in every edition, the editorial works hard to put

out an interesting and engaging edition for you all to read.

Recently, however, we’ve been lacking a bit with the amount

of members who are writing articles and doing the formatting

of these articles. That is why we are looking for new

talent! In the centrefold of this edition, there is some more

information about what we do and what you can learn from

joining the committee. If this sounds interesting to you, don’t

hesitate to contact us or approach me in the Newtonroom so






With our engineering goggles on, it is time to get ready for the taste test

of a lifetime. Picture yourself in the new workshop on the CAD terrain,

standing over a long table, equipped with an unprepared Egg of Columbus.

As we don’t want to mess things up, let us first carefully analyse

the egg to come up with the ultimate engineering strategy for cooking

this ancient artefact to perfection.


Naturally, perception is one of the most important things when it comes

to tasting. To truly understand what our tongue is experiencing

once ingesting the Egg of Columbus, we must delve into the world of

geometry. After all, we as mechanical engineers are no strangers to calculating

angles, dimensions, and curves. In the previous edition of The

Appel (45.3), the article Appeltje-Eitjes? provides insights into why eggs

have specific shapes to meet various requirements. The Egg of Columbus

however, has a unique geometry as it has its base slightly flattened.

Let us uncover the culinary secrets of this unique geometry.

First, let’s appreciate the egg shape itself. The curvy, smooth, symmetrical,

and perfectly balanced geometry is a true engineering marvel.

As mechanical engineers, we appreciate precision, and the egg is the

pinnacle of geometric accuracy.

Now, let’s address the base. The interruption of the smooth surface into

a discontinuous segment seems horrible at first, but now imagine a

spur gear with one of its teeth broken, leaving a flat surface.

The gap unintentionally serves as a clearance that allows the mating

gears to run smoothly without interference. Like with the egg of Columbus,

the imperfection didn’t turn out to be a problem but a solution!

In culinary terms, this flattened base might resemble an element

of crispness that contrasts with the silky smoothness of the rest of the



Our engineering minds begin to wander. How did Columbus achieve

the perfect balance of textures and flavours? Our engineering curiosity

leads us to think about the heat transfer processes at play during the

cooking of the Egg. Or so I presume once you have attended Module 7.

We assume that the Egg’s interior must have been gently cooked

through convection, conduction and radiation. An ordinary pan on the

stove wouldn’t have done this marvel justice. Columbus would have

had the Egg slowly cooking by radiation of the first rays of sunrise. Or

maybe he used convection in the way heat circulates in a nicely designed

HVAC system. Whatever he used, the slow, even heating resulted in

a beautiful creamy consistency to let your mouth feast upon.

On the other hand, the crispy base likely owes its

texture to the rapid conduction

of heat,



For those of you unfamiliar with the story, let me provide a quick recap. Christopher Columbus, the infamous explorer,

was once challenged by a group of highborn snobs claiming that anyone could have discovered America as easily as

he did. In response, Columbus picked up an impossible task: making an egg stand upright on a flat surface without any

external resources supporting it. After some thinking, he sneakily cracked the egg’s bottom a bit, allowing it to stand

upright. The lesson learned? The simplest solution can sometimes outsmart the most brilliant minds.

Now, let us imagine that Columbus didn’t just crack the egg but decided to afterwards turn it into a culinary

masterpiece. What would it taste like? How could we apply our mechanical engineering skills to construct the most eggstraordinary

dish ever? Dear Newtonians, let us dive into this gastronomic exploration!

like how heat travels through a well-conducted circuit. The heat concentration

at the base would have caused browning and caramelization,

creating a delightful contrast to the creaminess in the middle.

We don’t know how he did it, but it must have been a culinary heat

transfer masterpiece that combines the best of both worlds, just as we

engineers strive for optimal solutions in our mechanical designs.


Now that we have analysed the Egg to our fullest extent, we can start

the cooking. Luckily, us Newtonians never fail when it comes to obtaining

proper results in our experiment and… there you have it: a perfectly

prepared Egg of Columbus. We get our finest cutlery out and start

digging in.

The flavours, it seems, mirror the principles of mechanical engineering,

combining precision and innovation. The creamy centre represents the

classic, dependable aspects of our study, while the crispy base introduces

the element of surprise and creativity.


As we finish our egg tasting, we can’t

help but think about how Columbus

unknowingly engineered a culinary

masterpiece that resonates

with our mechanical


The Egg of Columbus, with its marvellous geometry and innovative approach

to cooking, shows the power of simplicity and creativity.



In a world filled with complex gadgets and high-tech machines, this

humble egg reminds us that sometimes the most brilliant solutions

are elegantly simple. As mechanical engineers, we can draw inspiration

from the Egg of Columbus, not just in our designs but also in our way of

working and solving problems.

So, the next time you find yourself facing a complex engineering challenge,

take a moment to think about Columbus and his egg. Maybe the

solution is easier to achieve than you think, waiting to be cracked, just

like the egg.

In the end, the Egg of Columbus teaches us that innovation can be found

in unexpected places, even in ordinary eggs. It’s a reminder that we,

as mechanical engineers, are the modern explorers of our era, seeking

new frontiers in science, technology, and even cooking. Seeing past the

edge, just like Columbus did. One day we will make the grand discoveries

in life ourselves but for now: Enjoy your meal! a







Did you know that the

surface of Mars has been

mapped up to an amazing

accuracy of 5 metres? Maps

of our ocean floor only have

a resolution of 1.5 kilometres.

This means that the maps of Mars’s

surface are 300 times sharper than

the maps of our ocean floor! Crazy

right? Why haven’t we mapped the ocean

floors properly? Why should we? And how

are we going to? Let’s dive into the world of

bathymetry, the study of seabed topography.


Having a map of the ocean floor is of crucial importance, especially in

times of crises. For example, during the search for the lost MH370 plane,

boats went onto the oceans to try to find the missing plane. However,

the floor of the ocean consists of a varying landscape with very big

mountain peaks, that are easily big enough to hide a plane. Having maps

of the ocean would have been a great start to pinpoint possible locations

where the plane could have ended up.

On top of that, mapping the ocean floor can be useful in predicting

tsunamis. For example, near the Bahamas, there is a potential for underwater

landslide, which in turn can cause a tsunami that could reach

Florida. Mapping the ocean floor can reveal instabilities in the seafloor,

which could be indicators of these tsunamis.

Having a map of the ocean floor can also give a better understanding

of the currents in the ocean, and what they arise from, which in turn

is important for finding optimal routes for commercial ships and placement

of offshore industries. Nowadays, the ocean floor is also an important

place for internet cables, having a total length of at least 1.5 million


And lastly, besides all these arguments that provide the use of knowing

the ocean floor, isn’t it just weird that we know more about the dark

side of the moon than about our oceans? It is kind of like having a pond

in your backyard, and not knowing what’s inside. So enough reason to

explore the ocean floor.


Before we dive into the depths of the ocean, let’s first stay at the surface

level. Because while exploration of the ocean floor is relatively new,

the surface of the ocean has already been monitored for a long time.

4000 profiling floats are scattered across all oceans, which continuously

measure properties like salinity and temperature. Additionally, drifting

buoys are equipped with a lot of sensors to measure properties like

atmospheric pressure, temperature and velocities. All these measurements

combined can map currents in the ocean and are important for

predicting the weather. These floats are important but only go up to

depths of 2000 metres, which is often not revealing about the ocean


The ocean’s surface is also measured from space! The Jason satellites use

radio waves to measure the height of the ocean surface, which is mainly

used to measure the effects of climate change. These measurements are

also used to roughly map the ocean floor. This is because the ocean surface

height resembles the ocean floor height because of gravity. Every 10

days, Jason can measure 90% of the ocean surface height! Fast, but not

so accurate.

Sadly enough, we cannot use the satellites that we use for mapping

Mars with high resolution to map the ocean floor. This is because as the

water becomes deeper and deeper, light scatters so much that after 200

metres it is dark. This means that no light reflects to be detected either.

This way, we cannot take pictures, to make high-accuracy maps. So, how

do we map the ocean floor?



0.8 km: Burj Khalifa

1.0 km: Light can no longer penetrate the water.


One of the first techniques of mapping the ocean floor was by

letting a weighted rope down into the water. The idea here is of

course very straightforward. Keep track of how much rope you

have thrown into the water until it hits the floor. Fathoms were

used for this, a unit which is defined as the average length of a

man’s arms fully stretched (roughly 1.8 metres). This funny but

clever definition of a unit is sometimes even still used for bathymetric


Sadly enough, the technique has a lot of limitations. At very deep

points in the ocean, it is hard to determine when the rope actually

hits the floor because at a certain point, the weight of the line

could also cause it to keep on sinking, even after it hits the ocean

floor. Also, with underwater currents the line can sway sidewards,

overestimating the depth. The biggest drawback of the technique

is that it is extremely time-consuming as well as labour-intensive.

Nowadays, a lot of other techniques are used for measuring the

ocean floor. First, there is airborne laser bathymetry. An airborne

vehicle flies above the ocean and sends laser signals into the

water. It measures two reflections, one returning from the ocean

floor and one returning from the surface. This is a fast technique

because even though the ocean is deep, the speed of light is so

fast that measurements can be done in a fraction of a second. For

this technique, usually green light is used to efficiently penetrate

the ocean water whereas infrared light is used to bounce off the

ocean surface.

Another technique that is often implemented is multibeam sonar

measuring! Multibeam sonar spreads sonar signals in a fan

shape from one side of a ship to the other and underneath it.

This way, areas of even 10km wide can be mapped simultaneously!

They measure the ocean depth, but also the backscatter,

which measures the intensity of the sound signal as it returns

to the sensor. This gives information about the floor. Hard materials

like hard rocks will return a higher intensity sound signal

than clay or mud. A lot of ships are equipped with these

sensors and are sent out to measure the ocean floor’s depth.

Multibeam sonar and laser airborne bathymetry are both great

and accurate ways to measure the ocean floor. However, there is a

problem with both techniques. As the ocean becomes deeper and

deeper, both methods become less accurate. The main problem is

that these measurements are dependent on an accurate estimation

of the speed of light and the speed of sound. As the ocean

becomes deeper, the error in ocean height becomes larger because

of the error in the speed of light/sound.




Therefore, the most

accurate way to measure

the seafloor is to get

some devices down there

that do the work. That is

why some robots are developed

to go down there!

These robots are designed

to fit a lot of sensors and to

take as much information

with them as possible when

going up. However, designing

these robots is difficult. With

depths of the ocean reaching 10

kilometres (deeper than Mount

Everest is tall), the pressure becomes

crushing. Every 10 metres,

the pressure increases with one

atmosphere of pressure, which

brings a big engineering challenge.

Challenger Deep is the deepest spot

in the ocean, located in the Mariana

Trench in the northwest of the Great

Ocean. At this point, the pressure

would reach approximately 1100 atmospheres!

Combine that with a pitchdark

setting, you can understand why

multibeam sonar is the easiest way to

map the ocean floor, albeit a bit slow.

3.8 km: Titanic shipwreck

4.5 km: Alps peak


Mapping the ocean floor using multibeam

sonar equipped on ships is like mowing the

lawn, except the lawn is insanely big. Therefore,

forces need to be combined to map the

ocean floors. Enter Seabed 2030, an initiative

to have mapped the whole ocean floor to an

adequate resolution by 2030. In 2019, only 15%

of the ocean floor was mapped to this accuracy,

but now in 2023, already 25% is mapped. There is

still a long way to go, but the future is exciting.

Maybe we will find some interesting shipwrecks,

new animals, or amazing seamounts. Because

who knows what has remained hidden for all this

time under the resolution of 1.5 kilometres? k

8.8 km: Mt. Everest

11 km:





Curiosity kills the cat, they say, but that’s what drives us to make scientific

progress. Blissfully unaware of such philosophical notions as a kid, I was

happily dismantling wall clock mechanisms and FM radios to see what was

inside. It definitely killed the devices, but I got some satisfaction knowing

what was in there, which made it work as it worked!


Throughout my childhood I was always interested in how things worked

around me, especially large metal objects, called aircrafts, carrying

humans that seemed to effortlessly float and move through air. I spent

all my childhood and young adulthood in the metropolitan city of Chennai,

in the province of Tamil Nadu in India. Chennai’s airport, one of

the busiest in the region, was nearby, making it easy to spot the flying

machines frequently, which kept me interested and fascinated. I have

to say that my inquisitiveness was well fed by my parents and teachers

without which it would have been very difficult to navigate through the

maze of early adulthood.

After high school, I desired to pursue a career in building machines, be

it flying or stationary. However, in reality, the choice was limited due to

the lack of universities providing aerospace bachelors. Anyways I was

happy to choose mechanical engineering because it sounded broad, and

I had heard that it could be a good foundation for my interests. During

that period, I adjusted my goals slightly and reassured myself that I

would do a masters in aerospace engineering. Looking back, that was

a good decision for me since I gained a lot of interesting insights in

my bachelor years which comes in handy even today. One of the most

enjoyable activities was building an all-terrain vehicle for the BAJA

SAEINDIA competition as a team of students. We learnt many aspects

of technical and management skills in a hard way during that period.

During my bachelor studies, I frequently found myself in the role of

explaining technical concepts to my friends with ease. Inherently I liked

the process of teaching in a manner that others would understand the

concepts or derivations. In retrospect, I now see a connection between

my inclination to teaching and becoming a lecturer. Over time, I realized

it would be nice to gain some industrial experience before barging into

master’s studies.

After my bachelors, I joined the R&D division of WABCO TVS India as a

graduate engineering trainee working on clutch servo actuators. I learned

quite a lot working in an industrial environment, reverse engineering

devices, operating CNC machines and working in assembly lines as

part of my training. At some point, I wanted to continue pursuing my

interest in flying machines and joined a master’s in aerospace engineering

at TUMunich-Asia in 2009. I learnt from passionate lecturers and

teaching assistants (PhDs) from NTU and TUM during that period and

got inspired to carry out my master’s assignment in a research environment

in Munich.

My research interests propagated in the direction of structures and

materials, and I ended up in Twente doing my doctoral research on

discontinuous composite

materials with

prof. Remko Akkerman

in the chair of production

technology and ThermoPlastic

composites Research Center. My

most cherished memories during my adulthood, both academic and

personal, were created when I was doing PhD. My experience in the industry

and background in mechanical engineering helped quite often in

getting up to speed in the laboratories to perform experiments. I worked

on characterizing the manufacturing process and mechanical properties

of composites with a rather unique type of discontinuous reinforcement.

One of the notable applications is downcycling of production

scrap into usable structural components. Parallelly my academic interest

also grew to the point that during my postdoctoral research period

I was filling-in a temporary gap in teaching about polymers.

Since I enjoy both research and teaching, I joined the chair of applied

mechanics (then), now Applied Mechanics and Data Analysis, a vibrant

group of multidisciplinary researchers chaired by prof. Bojana Rosic. I

took over some bachelor courses like statics, mold design specialization

and mechanics of materials over the course of time. I have always enjoyed

conveying knowledge in as many ways as possible, to make sure

it resonates with various students and thus is effectively absorbed. I am

always fascinated to see the Aha! moments in the students when they

cross the barrier of learning a new concept, and that motivates me to

keep pushing and improve myself. The students seemingly liked my approach

in teaching as well, and they responded by awarding me the best

teacher of the year award in 2021. I am humbled by this response, and it

certainly encourages me to continuously improve my skills. Currently,

we see that the study environment is becoming more international and

diverse than ever. I believe creating an inclusive and safe learning environment

is of utmost importance. Hence, I am trying to work towards it

as I progress and learn along the way.

At present, I am working on characterization of heterogenous materials,

and the methods to understand the variations in their properties arising

from both the manufacturing process and the inherent variations

in the constituent materials. Many bachelor and master students have

also helped me in paving this path. I hope to nudge the current understanding

of heterogenous materials in a direction where the engineers

of the future (you!) can use it to design safer and efficient light weight

structures. If you want to be a part of this journey, don’t hesitate to

contact me for a bachelor or master assignment.





Though it has only been a month, the moody weather makes it feel

like the Dies-festivities were held ages ago. To keep the memories

fresh, let’s look back at the entire week, and the many highlights we

got to experience together!

Though the week officially started on Monday, many of you probably

caught wind of the preparations on Friday; suddenly the Horst was

adorned with a beautiful banner, reading ‘Newton Toren’, reminding

us of the association that truly rules over the tower. Did you know

that the Horst used to be called the ‘Werktuigbouwkundig Gebouw’

(‘Mechanical Engineering Building’)? Not only the tower itself was decorated,

but: we hung some flags on the side of the Horstpond as well!

The week started strong with the ‘Anything but a Backpack-day’,

during which we revealed our secret merch-item; the ‘Newton Torenposter’.

Anyone who carried their books in anything but a backpack

received this item for free. Many different items were spotted, including

a guitar case and a beer crate.

On Tuesday the biggest activity of the entire week took place; the Skelterrace!

Accompanied by live music, many teams contested to figure

out who were Newton’s best racers. Though many skelters did not

withstand the extreme stresses they were put under by Mechanical



Engineers twice the age and weight of the original target audience,

the race had to go on, and many teams had to execute an emergency

repair. It was a great success and something we won’t easily forget!

On Wednesday our Lunch-lecture included a small bonus; everyone

got a green apple along with their lunch. The next day a green tapestry

suddenly appeared in the Horst, leading everyone straight to

the Newtonroom. In that Newtonroom we held a true rave, with a DJ,

drinks and lighting to match. That was only the beginning though;

after a Diepzatdrink and dinner at the Sportkantine, the night really

got going. The Diesparty in the Vestingbar saw the introduction of a

revolutionary cocktail: The Newtontonic. Although I won’t get into the

drunken adventures of the night, I think everyone will understand

the low attendance at the end of the Diesweek the next morning: Beeryoga

did end up being a bit of a bridge too far for all but the most

hardened Mechanical Engineers.

We hope you have as many good memories from this legendary week

as us!




The 66 th board will be running the association until the 7 th of February,

after which their successors will take over. After a long and

tough search, the candidates for the 67 th board have been found.

From left to right in the picture above: Bernd Boerma, Timme Mes,

Niels Winkelman, Veerle Schenkelaars & Marieke Holters. In the coming

months you can recognize them by their signature black tie

with a white Newton logo and “Kandidaat” on it. Of course, the candidates

won’t know how to manage the association from day one,

so the current board will help the candidate board find their way,

making sure they are well prepared to run our amazing association.

Their functions will be announced on the 7 th of December.


On June 30, our association members set out on an expedition across

Twente, utilizing their preferred mode of motorized transport. The

rally commenced with a customary Le Mans start, where each participant

sprinted towards their yet-to-be-started vehicle, hopped in,

ignited the engine, and set off! Divided into teams, we embarked on

a scavenger-hunt-esque adventure, exploring numerous charming

spots in Twente, predominantly following the tourist routes. Each

team thoroughly enjoyed the experience, and remarkably, we all arrived

at each destination approximately simultaneously. Since the

Newton Rally isn’t a race, the most effective strategy for accumulating

points was, of course, to maintain a steady, unhurried pace!


During the second weekend of October, first-year bachelor students

embarked on a cycling journey to Beuningen near Denekamp,

staying at a charming dairy farm. The first night was marked by

an all-night party, highlighted by the lively beer-relay competition.

The night was such a hit that it proved difficult to rouse everyone

from their beds the following morning. After a hearty breakfast,

the day was filled with activities such as a tour of the dairy farm,

real-life stratego, keg-rugby, and came to an end with the notorious

FYW-Cantus. At the cantus, voices echoed as everyone sang their

hearts out, and, most notably, there was a great deal of playful rebellion

against the senate. Which culminated in memorable lessons

for the troublemakers and an unforgettable weekend getaway.


Halfway through October the MeisCie, the Women’s Committee,

organized a pottery workshop for 30 women in Mechanical Engineering

and Sustainable Energy Technology. First the committee,

in their bright Lila sweaters, explained different pottery techniques

and gave some examples of what you could make. After that, everyone

got to work with their own imagination. Some students came

prepared with an object they would like to replicate like a nose from

clay to hold your glasses. Others scrolled through Pinterest to get

inspired. In the end, all kinds of things were crafted, like jewelry

trays, mugs, bowls, nice scenery from a holiday, pretty room decorations

or pots for all your plants. It was a nice bonding activity

to bring the women of ME, as we don’t have many, closer together!




Every quartile, the Quality Assurance Committee (QAC) evaluates a selection of the Bachelor and Master

courses of Mechanical Engineering and the Master courses of Sustainable Energy Technology. We do this by

sending a questionnaire to all the students that follow a specific course. Thanks to everyone that fills in these

questionnaires, we are able to evaluate the different courses and write our reports. Thank you for your input!

In four editions of De Appel, we name the most important highlights of these evaluations. This way, you can

get a short view of the results of the committee and, in some cases, the comments of the lecturers. In this

edition, the courses of quartile 4 of the year 2022-2023 are mentioned. The yellow courses are UT Bachelor

courses, the blue ones Master courses. If you are curious about the full report of a course, you can go to our

website: http://www.utwente.nl/wb/evaluatie.

On behalf of the Quality Assurance Committee ME/SET,


21% 4.1







• Students appreciated the availability of the teacher.

• Students found that the workload was too much for the given number

of ECs.







• Students felt that the project was relevant to their education.

• Students did not appreciate the timing of the deadlines.

• The project description was sometimes vague.


• Students found some errors in the solutions provided to

the exercises.

• Students appreciated the new practical added this year.

25% 3.6



• Students found the course to be relevant to their education

• There was a lack of practice materials.


This percentage represents the

amount of respondents out of the

total students taking the course.


The average score, ranging

from one to five, given by the





• Students appreciated the availability of the teachers.

• The coherence between some of the topics, discussed in the course,

was unclear for most students.

• Students did not appreciate having an attendance sheet for coming

to the lectures.




• Students found the learning outcome to be relevant to their


• Students would have appreciated it if some of the topics were

discussed even further.







• Students appreciated the availability of the teacher.

• Students prefer having a theoretical assignment rather than a

written exam.







• Students found the content of the course to be interesting.

• Students did not like the structure of the lectures.

• Students would have appreciated more real-life examples.







• The students found the course to be interesting.

• The students found that the study material could be improved.

90% 4.2



• Overall, the students appreciate the course.







Een studentenhuis eert zijn tradities. Onze voorvaderen,

zij die zijn afgestudeerd lang gelee, kijken vanuit hun hoge

kantoorbanen op ons neer. Wakend over de verwonderde

zielen die hun weg vinden in de residentie eens door hen

bewoond. Ook zij hadden huisavonden; bijzondere gelegenheden

waarbij zelfs de doorgewinterde balletjes uit de

Pakkerij rollen en grijze muizen uit hun holletjes kruipen

voor een nacht vol semi-geforceerde gezelligheid. Maar

liefst twaalf keer per jaar verzamelt ons huis zich voor een

mysterieuze activiteit georganiseerd door één van

de bewoners. In de krappe woonkamer worden

objecten gezocht die nog iets van een

zitvlak weg hebben. De ene helft zit op

gekantelde kratten Klok, De andere op

oude bureaustoelen geadopteerd van

het oud vuil. De kok gooit een pot

slappe rijst op de hard-stalen tafel.

Een scherp oog kan een verdwaald

stukje kip ontdekken; een waar feestmaal.

Wanneer de magen zijn gevuld

en de eerste pot bier geleegd is, verzamelen

we ons op de doorgezakte bank om een

presentatie met de avondplanning te aanschouwen.

Dit gaat gepaard met het uitkafferen van de andere

bewoners op komische wijze. Van het weekend heeft de

HJ de koffiepot niet onder het apparaat gezet, wat resulteerde

in koffie in het stopcontact en doorslaande stoppen.

Ook de nestor maakt nog wel eens een foutje en vond dat

blendergebruik ook prima kan zonder deksel. Het huis is

gedecoreerd met een prachtige plafond-smoothie. Onder

het kabaal van geschaterlach en klinkend glas vertrekt de

inmiddels aangeschoten roedel naar buiten. Op weg naar

een casino, een trampolinepark, een speurtocht of een

kroegentocht. In thema kledij of met de huisshirts aan. De

kleine conflicten die de afgelopen tijd rond het afwassen

ontstonden worden al gauw vergeten en vergeven na de

bodem van tig pitchers gezien te hebben. De voorvaderen

bewonderen ons met een lach op het gezicht.

Eenmaal weer thuis gearriveerd vindt de HJ een verdwaalde

fles rum in het hoekje van de ijskast. De nestor prijs

hem voor zijn vindingrijkheid. Het huis-imago dat naar zijn

eigen handelen menige klappen geïncasseerd heeft in de afgelopen

weken lijkt plotsklaps hersteld. De huis ICT’er voelt

zich geroepen om funeste video’s af te spelen op de tv. Het

overig gepeupel neemt gedwee plaats voor de buis.

Er wordt geschreeuwd, gelachen en genoten

maar de gesprekken ontgaan me. Mijn bezatte

ogen staren inmiddels door dubbele

lenzen de wijde wereld in. Gekust

door de melodie van de nacht vormen

warme blosje op mijn wangen, neus

en oren. Zwevend neemt het me mee

naar mijn knusse, ietwat slonzige

slaapkamer. Een tapijt van met avontuur

doordrenkte kleding vormt zich op

de vloer en mijn kussen voelt de omhelzing

van een man die met zeebenen in zijn

wollen schuit duikt. Afgevoerd naar dromenland,

waar de Horstvijver een subtropisch zwemparadijs is en

Diepzat het hele jaar door Weizen op de tap heeft. Hmmm…

Bij dageraad verdwijnt de roes van vorige avond net zo

snel als mijn ruggengraat op een donderdagmiddag. De

vloer glinstert, niet door de verse schoonmaak maar de

weerspiegeling van groene glasscherven en aangekoekt

bier. Een molesterende wervelstorm van zatte studenten

heeft werkelijk waar de plafond smoothie nog een rooskleurig

randje gegeven. Maar goed, er valt aan te wennen

zolang het maar bij die ene keer per maand blijft. Ik zucht

een laatste maal diep en kijk nog eens goed in het rond: De

morgenstond heeft goudgeel op de grond. TS





The beginning of the European age of discovery started by Henry the

Navigator. Henry became a royalty by being born as third or fourth son

of the catholic king of Portugal in 1934. Together with his brothers, they

made name by conquering the north African coastal city Ceuta in 1415,

located on the strait of Gibraltar in present-day Morocco. Ceuta was

very rich by being the end of the Muslim trade network for caravans.

The goal of the conquest was to stop pirate-attacks at the

Portuguese coast and take over the wealth of Ceuta. The latter

failed as the city of Tangier became the new trading place.

Cape Bojador

Henry believed that Portugal should seek out valuable

sources of trade for itself. This to control and take over the

flourishing Muslim trade and make money. Furthermore,

he was inspired by a crusade, in collaboration with the

Christian legend of Prester John, to be able to attack the

Muslims from two sides. Prester John was a myth about

a christian kingdom somewhere in the inlands of Africa.

Although it was disputed, Henry started a school of navigators

and map-makers in Sagres, south-west Portugal, for

exploration of the African west-coast. Sailors were sent out for

expeditions in which they had to sail a bit further down the African

coast then his predecessor. As they were afraid of the unknown,

they explored in small steps.

In 1424, Cape Bojador (currently in the country Western-Sahara) was

the most southerly point known to Europeans on the west coast of Africa.

For centuries, superstitious seafarers held it impossible to cross

this Cape for multiple reasons. They would argue that the shallow cape

would last for kilometers into the sea, making it impossible to pass,

or the sea water was boiling or there were sea monsters at the edge

of the world. However, Henry was determined to know the truth. He

was persistent and sent 15 expeditions over a ten-year period to pass

the dreaded Cape. Each returned unsuccessful. The captains gave various

excuses for having failed. Finally in 1434, a commander of one

of Henry’s expeditions, Gil Eanes, became the first known European to

pass Cape Bojador in almost two millennia.

As the Portuguese explored the coastlines of Africa, they claimed land

and built fortresses and trading posts. From these bases, the Portuguese

engaged profitably in the slave and gold trades. Portugal had a

monopoly on slave trade for over a century, bringing around 800 enslaved

to Portugal annually. Most were brought to the Portuguese capital

to be traded, where it is estimated that black Africans became up to 10

percent of the population of Lisbon.

Henry the navigator passed away in 1460. By then Portugal only explored

until the current Liberia and Côte d’Ivoire border, but he is seen as

the patron of the Portuguese exploration. After his death, exploration

continued. Noteworthy mentions are the first rounding south of ‘Cape of

Good Hope’ by Bartolomeu Dias in 1488, proving that the Atlantic ocean

is connected to the Indian ocean, and Vasco da Gama being the first

European ever to reach the East Indies by sea in 1498. This achievement

gave Portugal a monopoly in the East Indies and a flourishing trading

of spices started.



Chrisopher Columbus, an Italian explorer and navigator, thought that

the fastest way to the East Indies was to go by boat on a western route.

This was because the silk route over land was closed for Christian traders

since the fall of the Byzantine empire in 1453 and he didn’t believe

that going around Africa was the fastest way. To prove this, he persistently

lobbied in multiple kingdoms to financially support a journey to

the East Indies. Columbus found funding for the trip from the Spanish

Kingdom. In comparison to Portugal, which already completed the Reconquista

in 1250 (the war between Christian kingdoms versus Muslim

kingdoms on the Iberian peninsula) it would take up till 1492 to defeat

the last Muslim kingdom in Granada. After the Spanish king regained

control over the peninsula, the focus could be shifted from warfare to

exploration by supporting Columbus.

Although the equator was already measured quite accurately by Greek

mathematicians in the third century BC, Columbus managed to miscalculate

the distance to East Indies through a western route by 58%. This

is due to the conversion error between an Arabic mile (1830 meters) and

a shorter Roman mile (1480 meters). Furthermore he thought that the

then known world, from Lisbon to East Indies would span 210 degrees

longitude, but in reality that is only spanned 130 degrees. If Columbus

performed his calculations correctly, he knew he had to sail 19600 kilometers

on open sea from the Canary islands to Japan, which by then was

impossible as not enough food and fresh water could be carried.

Columbus departed with three ships to the Canary islands to restock

provisions, whereafter he set sail west for the unknown. After a voyage

of five weeks westwards they saw land for the first time and on October

the 12th 1492 Columbus went ashore on the island named ‘Guanahani’ by

the locals on San Salvador in the Bahamas. Columbus thought this was

the East Indies, but in reality he found the ‘New Land’. Columbus started

trading with the tribes he called Indians as he thought was trading

with the people of the East Indies. As one of the three ships got stuck in

nowadays Haiti, the 39 crew went ashore and built, with the remains of

the ship, a fortification named Hispaniola. This was the first European

settlement in the New Land. More fortifications were, according to Columbus,

not required as all tribes, except for one, weren’t violent against

the Europeans. Columbus was welcomed as a legend on his return in

Spain back in 1493.

In 1493 Columbus returned for his second journey, this time to establish

permanent colonies. When he returned to the fortification built

on the previous voyage, it was completely destroyed by the Indians as

revenge of the unrestrained Spanish lust for gold and women. Columbus

explored the coasts of Cuba and Jamaica before returning to Hispaniola

where he implemented a Spanish labor system. This system rewarded

conquerors with the labor of conquered non-Christian people, enslaving

the indigenous people, including children. Columbus was not only

feared by the indigenous people, also Spanish colonists were afraid for

him as he executed Spanish colonists for minor offenses. After a trip of

30 months, in which two thirds of the Spanish died due to famine and

diseases, the fleet departed with the 500 strongest slaves back to Spain,

from which only about 300 survived the route.

In 1498 Columbus departed for the third time to the New Land. This time

he landed in current Venezuela which was the first recorded landing

of Europeans in mainland South-America. With this landing Columbus

should have realized he found a new continent and not the East Indies.

When he returned to Hispaniola there was a rebellion against his rule

due to unfulfilled promises of riches. He turned down the rebellion with

violence and sent two ships back to Spain for support. However, by then

they knew in Spain that Columbus ruled Hispaniola with torture and

mutilation. The governor named Bobadilla, sent by the Court of Spain,

took over Columbus’ power when he arrived, arrested him and sent him

back to Spain. After just six weeks in prison, the king of Spain ordered

his release, made excuses for Bobadilla and restored the lost properties

of Columbus. The investigation of Bobadilla was considered false and

biased as he was eager to take over Columbus’ power in the New Land.

The fourth and last journey departed in 1502. Arriving at Hispaniola to

seek shelter for a storm, Columbus was denied port by Bobadilla. His

warnings for a storm were dismissed as fake by Bobadilla and the first

Spanish treasure fleet encountered a storm. As a result, 20 of the 30

ships sunk and 500 men drowned including Bobadilla. The ship with

Columbus’ belongings, earning a tenth of all income out of the New

World, made it to Spain. After this he explored for two months the coast

of Honduras, Nicaragua and Costa Rica for a strait leading to the East

Indies, which he obviously couldn’t find. Due to a storm Columbus was

beached for six months in Jamaica. A canoe paddled to Hispaniola for

help, but the new governor refused and actively obstructed all rescue

efforts. In the end, Columbus found help from the natives, after threatening

and predicting a correct lunar eclipse. Columbus and his men

returned for the last time back in Spain in 1504.

Columbus refused to believe that he found a new continent instead of

the East Indies. Amerigo Vespucci was also an Italian explorer and navigator

working first for the Spanish Kingdom and later for the Portuguese

King. On his second voyage, under Portuguese rule, he sailed

down along Brazil and discovered that the land found by Cristopher Columbus

was a new fourth continent unknown to Europeans. He called

this fourth continent the ‘New World’ in 1501. In 1507, this claim inspired

a German cartographer and to recognize Vespucci’s accomplishments

he named it after his first name in Latin style to ‘America’. By 1532 this

became the standard on all maps as other cartographers followed. It is

unknown whether Vespucci was ever aware of these honors as he passed

away in 1512.



It would take almost a century before the Dutch exploration started.

Willem Barentsz tried three times, unsuccessfully, the northern way

around Russia to find the East Indies. On his journeys he discovered

Spitsbergen and Bear Island, contributing to whaling. He died on the

return voyage of his second journey, after spending the entire winter

in ‘het behouden huys’ on Novaya Zemlya after the boat got frozen into

the ice. The sea in between Spitsbergen, Bear Island and Novaya is called

after Willem Barentsz as the Barentsz sea.

The first Dutchman to pass ‘Cape of good hope’ and reach the East Indies

by boat was Cornelus de Houtman. He achieved this almost a century

later than Vasco da Gama in 1596. To know the route he went in the years

before as a spy to Lisbon, but was caught and prisoned. After paying

ransom he could return home to the Netherlands. The first trip was economically

not a success, but that changed after the establishment of the

Dutch East India Company (De VOC) in 1602. For 21 years, this first jointstock

company and multinational had a monopoly on warfare, trading,

negotiating treaties, establishing colonies and enslaving people in the

East Indies. The flourishing and prosperous trade was completely taken

over from the Portuguese.

The Netherlands being late in arriving in the East Indies, it was the

first to discover New-Holland, now better known as Australia, by Willem

Janszoon in 1606. Janszoon didn’t completely realize what he discovered

as he thought it was just a part of New-Guinea. Multiple Dutch explorations

followed the coast, but the violent interaction with the aboriginals

and the lack of fertile lands prevented the establishment of colonies. Colonization

of Australia occurred only in 1770, after the Brit James Cook

landed on the east coast and founded Sydney.

As nowadays our power ends already in Brussel, we only need a small

glimpse on the world map to see how far our power once reached as

can be seem in the picture above. From the Islands of New-Zealand and

Tasmania in Oceania, to Cape Horn and Easter Island in South America,

to the global cities of New York, Cape town and Jakarta around the globe.

They all were once controlled by the Dutch government. K




W.S.G. Isaac Newton has several committees that are relatively unknown. These

committees will be highlighted here by telling their story. From start to finish, with

all their highs and lows. This time the KIME will be featured.

During the yearly Kick-In, there are three

study related days. For Mechanical

Engineering, these days are organised by the

KIME, which logically is an abbreviation for

Kick-In Mechanical Engineering.

Every committee comes up with their own

unique name, and the name we came up

with for this year’s KIME was TurbulenCie,

the Dutch word for turbulence. This name

suited the committee well, as our start was

quite turbulent. Starting the committee with

only three members at the time, the road

ahead seemed to be quite tough. Luckily, we

managed to pick up another enthusiastic

member along the way, creating the perfect

group to organise the Kick-In.

In the following months, preparations were


made. Even though you work closely with

overarching organisations such as the Kick-In

board, there is still a lot of freedom in how the

three faculty days are filled. For Mechanical

Engineering the first day was university

related, so we prepared student coordinators

to give talks and workshops about all systems

at the University. The next two days are the

so called ‘beundagen’, where the students

get to build some of the most ingenious

contraptions. In preparation for this, we

got to drive our great newton van all over

Enschede to pick up loads of bikes and wood.

It was quite interesting to see how many bikes

(working and broken) the average Mechanical

Engineering student has, with some even

having what seemed like their own little bike

repair shop. The broken bikes and wood were

put to good use as the students made catapults

and beverage trays on the first day, and what

were supposed to be cranes on the second day,

but unfortunately this was cancelled due to

rain. The cranes were substituted for bridges,

and the wood for spaghetti, to still give an idea

of building something with trusses. While the

rain was unfortunate, this still turned out to

be a fun activity in the end.

All in all, organising the faculty days was a

fun but also stressful experience. Fortunately

having an amazing group of people to organise

it with made this a lot more bearable. It was

great to see all the new students having a

good time with the activities that we as KIME

had the chance to organise.

On behalf of the committee,

Niels Winkelman (Secretary KIME 2023)



1 Februari 2023 was het dan

zover, W.S.G. verkreeg een

nieuw lid in de vorm van een

blauwe Volvo V70 stationwagen

uit 1997 met de oerdegelijke

2.5l 10v 5 cilinder. Net

zoals vele studenten maakte

ook zij de reis van het westen

naar het oosten om in het

mooie Twente te vertoeven.

Met vele imperfecties stond

ze binnen de kortste keren in

Enschede. Veel zin had ze hier

echter niet in, aangezien ze na

2 km, bij het tankstation, al

niet meer wilde starten. Toen

de daadwerkelijke reis moest

beginnen begaf de accu het.

Wie zijn wij? Wij zijn W.S.G., een groepje vrienden, dat in eerste instantie een interesse in golfen had, maar eigenlijk

ondertussen meer tijd hebben gestoken in het beunen aan auto’s. W.S.G. staat voor Welvaart Sabrage Golf. Dit

waren in het begin de waarden en activiteiten die wij als groep graag ondernamen. Ondertussen zou het misschien

toepasselijker zijn om ‘Wij scheuren graag’ te heten, hoe dan ook, het logo zit nu al op de auto.

Eenmaal aangekomen in het mooie Twente werden de eerste wilde ideeën al in de rondte geslingerd voor de roadtrip

naar Portugal. Zoals een kleurrijke spuitbeurt, een dakrek en onder andere een enorme toeter die op standje

gehoorschade kan. De naam Bertha werd bedacht en deze is ook gebleven.

Voordat het uitvoeren van deze ideeën kon beginnen moest er wat achterstallig onderhoud weggewerkt worden.

Het bleek dat Bertha niet alle liefde heeft gehad die ze nodig had, in haar laatste jaren bij een boer in Noord-

Holland. Op de brug bleek wel dat ze voor deze periode wel onderhoud dermate van een dealer heeft ontvangen.

Achteraf gezien gaat het advies om geen auto’s te kopen met foto’s op een boerenerf toch wel op. De remmen, de

banden, de velgen, de bougies, de bougieskabels, de bobine, de verdelerkap, de rotor, de startmotor, de carterventilatie,

de injector o-ringen, de accu, het contactslot, het luchtfilter, het benzinefilter, het interieurfilter, het oliefilter,

de olie, de bumperbrackets, de camber bolts zijn allemaal vervangen. Hiernaast is Bertha ook uitgelijnd en zijn de

achterveren vervangen voor heavy duty veren zodat wij haar goed konden beladen tijdens de vakantie, zonder de

standaard Volvo te zijn die op de grond ligt.


Het idee van de Carbage run is om een originele auto te hebben en zo

een roadtrip af te leggen. De vereisten zijn een bouwjaar van onder de

2000 en een maximale prijs van €500,-. Wij hebben dit proberen uit

te voeren en tegelijkertijd geprobeerd een enigszins nette auto over te

houden zodat ook nog gewoon mee te rijden valt. Sommige auto’s tijdens

de Carbage run hebben namelijk wat plaatjes en spreuken op de

auto staan waar je buiten de Carbage run niet mee gezien wilt worden.

Bertha had eerst roest langs de dakrails, die gelukkig nog niet helemaal

doorgeroest was, welke wij gerepareerd hebben. Helaas hebben

wij tijdens de reparatie de lak van het dak beschadigd waardoor het dak

sowieso gespoten moest worden. Wij hebben er toen voor gekozen om

het geboorteland van Bertha te eren met een Zweedse vlag op het dak,

ook al is ze waarschijnlijk in België van de band gerold.

Tijdens de Carbage run heeft Bertha zich degelijk gedragen, ook al werd

zij minimaal 6 uur per dag misbruikt. Het enige wat er na dag één al

mee ophield was de bestuurdersdeur, waardoor de ramen niet meer

open gaan en de spiegels niet meer verstelbaar zijn. Helaas stond het

rechterachterraam toen op een kier, dus daar zit nu nog een duct tapeje

overheen. Gelukkig hadden we de airco laten bijvullen voor vertrek dus

warm hadden wij het in Spanje niet, echter was frisse lucht ver te zoeken.

De oplossing: met deuren open rijden.

Het leuke van het bezitten van deze auto is dat de auto meer aandacht

krijgt dan een Porsche en dat je eigenlijk wel weet dat je in een bijzondere,

maar rare auto rijdt. Bovendien is het heerlijk om niet voorzichtig

te hoeven zijn met de auto. Zo scheuren we altijd zonder te remmen

over drempels. Bertha weet dit altijd bijzonder comfortabel te trotseren.

Zijn er dan ook nadelen aan Bertha? Jazeker, ze slurpt erg veel voor hoe

langzaam ze is. Over de 5000 km durende roadtrip hebben wij gemiddeld

1 op 9 gereden. Dit was wat minder voor de portemonnee. Daarnaast

beschikt Bertha over zo weinig vermogen dat ondertussen, airco uit de

naam sportmodus heeft gekregen. Om deze sportmodus uit te breiden

en toch het idee te hebben van snel gaan, komt er in de toekomst een

uitlaatklep in de uitlaat zodat wij ook zonder demper kunnen rondrijden

en iedereen het geweldige 5 cilinder geluid kan horen.








In November 2024, the intercontinental study tour will once

again embark on an epic trip. This time, Japan and Thailand

will be visited. The culture in Asia is of course different than

we are used to in the Netherlands. Not only the culture,

but also the food. Here are some weird foods that we can

encounter (and possibly try) on our trip.


Secretary & Commissioner of Research of the IC-tour committee


In Thailand, eating red ants eggs is business as usual. Larb mote

daeng, or red ants and ant eggs, is an exotic delicacy that surprisingly

tastes better than it sounds or looks. But only if you can just

conveniently forget that you’re scooping up a portion of ants’ eggs

onto your spoon! The food can be found in the street markets of different



This one can be found in Bangkok, on one of its street markets or

little shops. Hon Chai, or fried silkworms are garnished with salt and

pepper and sometimes a type of sauce. Once fried, the silk worms

turn crunchy and greasy, while the flavor is sometimes described as

slightly bitter. The worms are prized because they’re rich in protein

and some believe that they have medicinal properties.



A delicacy in Japan that can only be produced by top trained chefs.

Fugu or Pufferfish, is acclaimed for its distinctive texture and its deliciousness,

whether raw, boiled, or fried. The fish contains toxins

in its liver and intestines; some people claim it is 200x more deadly

than cyanide. Since 2000, 23 people have died eating it. This is why it

can only be prepared by a trained and certified chef.


Rich in protein, vitamin D, calcium and magnesium and good for your

health. Shirasu is a Japanese fish dish that can be eaten with bones.

They are less than 2cm in length, typically sardines, but can also be

the fry of herring, sweet fish, conger eel, or others. You can eat it raw

or boiled, depending on the region it is served in different ways. A

specialty in Kanagawa (just south of Tokyo) is the shirasu-don, which

is the shirasu on top of rice. The shirasu rice bowl should be a musttry

for people in that region.




Up for a challenge? Solve the Settlers of Binairo puzzle! We will raffle off two prices

with Isaac Newton socks among all the entrants with the right answer. To join the

lottery, submit your solution through our Google Forms before the seventh of January




The uninhabited land of Binairo is still largely unexplored. In the map below, the land has

been divided into boxes and the known information is sketched.

From each box, either stone, water, wheat or dairy can be obtained if the value of the box is

1. If the value of the box is 0, no resources can be obtained. In the land of Binairo, each row

and column must contain 4 resources. Furthermore, more than two of the same numbers

cannot be horizontally or vertically adjacent (e.g. 1-1-1 and 0-0-0 are forbidden). Rows and

columns do not have to be unique.

Once the resources are located, three new storages will be built in the country. Ten possible

places are considered, indicated by A-J. A storage can only be built at the intersection

of the boxes. At the storage, all resources are gathered from the four surrounding boxes,

as well as their adjacent boxes of the same color. For example, at storage K, the amount of

resources gathered are 0 stone, 3 water, 0 wheat and 2 dairy units. At L, we get 3 stone, 3

water, 2 wheat and 0 dairy. When building storage posts on K and L, the resources obtained

sum up to 3 stone, 6 water, 2 wheat and 2 dairy.

Of the ten marked possible storage posts, which three posts have to be built to obtain 6

stone, 8 water, 3 wheat and 5 dairy units?


1 0 1 0 1 0 1 0

1 0 1 1 0 1 0 0


0 1 0 0 1 0 1 1

0 1 0 1 0 1 1 0

1 0 1 0 1 0 0 1

0 1 0 1 0 1 0 1

0 1 0 1 0 1 1 0

1 0 1 0 1 0 0 1


Note: There is more than one way to locate the resources, but the favorable storage post

laces are unaffected by this!



1 0 1


0 1 0



0 0












1 1

Submit your answer

here for a change to

win a prize!

0 1 0 1




from edition 45.3 Nature vs Nurture

Here are the answers to the puzzle of the last edition. The two winners,

Matthijs Knol and Henryk van den Brink, have been contacted and you might

spot them in brand-new Newton socks!

Horst tower puzzle

Architects are planning on placing 35 more towers on our campus. They have the following

number of storeys: 8, 9, 10, 11, 12 and 13. There is only one tower of a certain height in each row

and column. The numbers on the north, south and west sides represent how many towers can be

seen from that direction - you cannot see a tower with a lower number of storeys behind a taller

one. How many towers can you see from the east of the new campus?


The following abbreviations are used: Ri is the i th row from the top, Ci the i th column from the

left. Furthermore, Ti refers to a tower of i storeys.




Step 1: Locating 13-storeys towers

The starting point is C2: the towers need to be in ascending order from R6 to R1. Furthermore,

there has to be a T13 at C1R2, as it’s the only visible tower from the West. Using the rule that

there is only one tower of a certain height in each row and column combined with the information

on the number of visible towers from the west, east and south, all T13s can be located.

Step 2: Locating 12-storeys towers

The tower at C5R1 has to be T12 in order to see just two towers from the North. Furthermore, to

see three towers from the west at R3 and comply with the ‘unique in row and column’, the T12

in R3 has to be at C6.

Step 3: Seeing five towers from the North

C3 has to be in ascending order from R1 to

R5. Given that R3 already contains an 11-storey

building, C3 can only be ascending if

C3R3 is T10. This automatically places the T8

and T9 in C3R1 and C3R2. T12 is placed at R4C3

to see just three towers in R4. This allows

for completing C3.

Step 4: Finishing the puzzle

T12 of C4 can only be placed in R5, which

means all 12-storey towers can be placed. At

C5R5, T8 is the only option to comply with

the west and north skyline views. This in

combination with the ‘unique in row and

column’ and the number of visible storeys

from the north, west and south leads to the

final cascade which, by eliminating the options

per box, allows to deduce the number of

towers that can be seen from the east. a



5 3 2

10/11 13 8 9/10 12 9/10/11 3

1 13 12 9 11 10 8 5

3 8 11 10 13 9 12 2

4 9 10 12 8 11 13 1

2 10/11 9 13 12 8 10/11 3

12 8 11 9/10 13 9/10 2

6 2 3 3


Towers that

can be seen



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