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Preface - kmutt

Preface - kmutt

KMUTT Annual Research

KMUTT Annual Research Abstracts 2005 Faculty of Engineering IJ-001 DUAL LEVEL ACCESS SCHEME FOR DIGITAL VIDEO SEQUENCES Thumrongrat Amornraksa, Peter Sweeney IEICE Transactions on Communications, Vol. E88-B, No. 4, April 2005, pp. 1632-1640 In this paper, a dual level access scheme is proposed to provide two levels of access to the broadcast data; one to video signals protected for authorized users, another to extra information e.g. advertisements provided for the remaining users in the network. In the scheme, video signals in MPEG format are considered. The video contents are protected from unauthorized viewing by encrypting the DC coefficients of the luminance component in I-frames, which are extracted from the MPEG bit-stream. An improved direct sequence spread spectrum technique is used to add extra information to non-zero AC coefficients, extracted from the same MPEG bit-stream. The resultant MPEG bit-stream still occupies the same existing bandwidth allocated for a broadcast channel. At the receiver, the extra information is recovered and subtracted from the altered AC coefficients. The result is then combined with the decrypted DC coefficients to restore the original MPEG bit-stream. The experimental results show that less than 2.9% of the size of MPEG bit-stream was required to be encrypted in order to efficiently reduce its commercial value. Also, on average, with a 1.125 Mbps MPEG bit-stream, an amount of extra information up to 1.4 kbps could be successfully transmitted, while the video quality (PSNR) was unnoticeably degraded by 2.81 dB. IJ-002 ON THE PERFORMANCE OF WATERMARK IDENTIFICATION USING SPEECH INTELLIGIBILITY Thumrongrat Amornraksa, Phiboonchart Tungtivachagul GESTS International Transactions on Computer Science and Engineering, Vol. 22, No. 1, November 2005, pp. 41-52 In this paper, a weakness of watermark identification using objective measures is addressed. Practically, the identity of a recovered watermark can be ambiguous if two different watermarks used in the system are nearly identical. We hence propose an alternative approach based on the subjective measures to correctly verify a watermark identity i.e. by employing human speech as a watermark and the speech intelligibility as its watermark identity. In watermark recovering process, the subjective listening test is developed and used for watermark identification. A set of experiments is carried out by embedding a speech signal into the images, using a WPT based watermarking algorithm. The speech recovered from the attacked watermarked images is identified by its intelligibility. The evaluation results at various types and levels of attacks are compared with the results obtained from the ordinary evaluation method based on normalized correlation (NC). IJ-003 ATTENUATION OF ENDOTHELIAL DYSFUNCTION BY EXERCISE TRAINING IN STZ-INDUCED DIABETIC RATS Daroonwan Chakraphan, Patarin Sridulyakul, Bundit Thipakorn, Srichitra Bunnag, Virginia H. Huxley, Suthiluk Patumraj Clinical Hemorheology and Microcirculation, Vol. 32, No. 3, 2005, pp. 217-226 The protective effects of exercise training on the diabetic-induced endothelial cell (EC) dysfunction were determined using intravital fluorescent microscopy. Male Spraque- Dawley rats were divided into three groups of control (Con), diabetes (DM), and diabetes with exercise-training (DM+Ex). Diabetes was induced by single intravenous injection of streptozotocin (STZ; 50 mg/kg BW). The exercise training protocol consisted of treadmill running, 5 times/week with the velocity of 13-15 m/min, 30 min/day periods for 12 and 24 weeks (wks). 24 wks after the STZ injection, blood glucose (BG), glycosylated hemoglobin (HbA 1C ), mean arterial blood pressure (MAP) and heart weight (HW) were significantly higher in DM rats (p

4 intravital fluorescence microscopy. The diabetic state enhanced leukocyte adhesion in mesenteric postcapillary venules (p

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    54 นอยกวาแบบต

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    56 (Least Square Matching Method)

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    58 อุณหภูมิ 30 แ

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    60 สเปกตรัม จา

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    62 ขอมูลดานทร

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    64 22.8 มาตรฐานเป

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    66 2545 NJ-033 EFFECTS OF ELEVATED

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    68 เปลือกที่ม

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    70 ของการดูดซ

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    72 การสกัดดวย

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    74 collection of authentic texts th

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    76 รอยละ 32 มีสา

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    National Conferences

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    210 จอมเทียนปา

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    212 การสกัดสาร

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    214 ไดแก อุณหภู

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    216 โดยกลไกของ

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    218 เคลือบเมื่

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    220 สําเริง จัก

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    222 ลดเวลาตลอด

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    224 อุณหภูมิสู

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    226 NC-043 การวิเคร

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    228 เกิดพฤติกร

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    230 เดียว เพื่อ

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    232 มากนอยเพีย

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    234 หลักที่พบใ

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    236 NC-073 การออกแบ

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    238 บทความนี้น

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    240 นําเอาเวคเ

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    242 งานวิจัยนี

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    244 การอบแหงลด

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    246 แยกเฟสต่ํา

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    248 กลบ โดยเปรี

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    250 นํามาใช คือ

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    252 วิเคราะหหา

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    254 NC-123 การวิเคร

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    256 NC-129 เครื่องผ

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    258 สามารถขยาย

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    260 ครั้งที่ 43, 1-

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    262 calculated with the use of the

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    264 Version 1.3.1 และ Softwar

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    266 ขนไกได จากก

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    268 โครงสรางขอ

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    270 การปลูกพืช

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    272 ระดับพึงพอ

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    274 ของแกสโซฮอ

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    276 1) สภาพทั่วไ

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    278 อนุปริญญา แ

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    280 อาชีวศึกษา

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    282 กระทบตอคุณ

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    284 ตั้งกลไกแข

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    286 นุชจรินทร เ

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    288 โดยรวมผูบร

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    290 แนนกระแสไฟ

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    292 NC-222 ผลงานตีพ

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    294 NC-227 เตาเผาไห

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    296 จําเพาะรวม

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    298 NC-238 จลนพลศาส

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    300 ทนงเกียรติ

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    302 ดีเซลนั้นม

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    304 NC-254 การใชเทค

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    306 อาคารศูนยก

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    308 กระบวนการร

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    310 บรรยากาศขอ

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    312 metal ions on 2-AP biosyntheis

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    314 total clones while the ethanol

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    316 การประชุมท

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    318 BioThailand (The 16 th Annual M

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    320 สูงที่สุดพ

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    322 นัยสําคัญท

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    324 ความเขมขนร

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    326 ปลูกแบบพรา

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    328 นี้ทําใหทร

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    330 ดุลชาติ มาน

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    332 ไมโครเมตร ส

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    334 In this study, we collected seq

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    336 กนกรัตน นาค

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    338 การพัฒนาสื

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    340 one of the causes of difficulty

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    342 ทวีรัตน วิจ

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    344 program, Cytoscape. This model

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    346 production demand. Nevertheless

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    348 อุลตราไวโอ

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    350 นี้อยูในชว

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    352 เพื่อนําสว

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    354 trichloroacetic acid (TCA) ม

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    356 ทรัพยากรที

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    358 ในประเทศสห

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    360 8-9 ธันวาคม 2548,

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    362 ซึ่งเกิดขอ

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    364 NC-391 การวิเคร

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    366 การประชุมว

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    368 2547) พบวามหาว

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    370 กนกพร ลีลาเ

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    Authors Index

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    376 จงจิตร หิรั

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    378 ธ ธนธร ทองส

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    380 พยุงศักดิ์

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    382 วรรณพ วิเศษ

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    384 สุดารัตน จิ

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    386 อุลาวัณย กุ

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    388 138, 141, 142 Jarunya Narangaja

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    390 Panida Kongsawadworakul 191 Pan

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    392 Sorakrich Maneewan 124, 136 Sor

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    394 KMUTT Annual Research Abstracts

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