Browsing by Issue Date, starting with "2012-04-17"

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Novel Active Personal Nanoparticle Sampler for the Exposure Assessment of Nanoparticles in Workplaces
(2012-04-17)
Tsai, Chuen-Jinn
;
Liu, Chun-Nan
;
Hung, Shao-Ming
;
Chen, Sheng-Chieh
;
Uang, Shi-Nian
A novel active personal nanoparticle sampler (PENS), which enables the collection of both respirable particulate mass (RPM) and nanoparticles (NPs) simultaneously, was developed to meet the critical demand for personal sampling of engineered nanomaterials (ENMs) in workplaces. The PENS consists of a respirable cyclone and a micro-orifice impactor with the cutoff aerodynamic diameter (d(pa50)) of 4 mu m and 100 nm, respectively. The micro-orifice impactor has a fixed micro-orifice plate (137 nozzles of 55 mu m in the inner diameter) and a rotating, silicone oil-coated Teflon filter substrate at 1 rpm to achieve a uniform particle deposition and avoid solid particle bounce. A final filter is used after the impactor to collect the NPs. Calibration results show that the d(pa50) of the respirable cyclone and the micro-orifice impactor are 3.92 +/- 0.22 mu m and 101.4 +/- 0.1 nm, respectively. The d(pa50) at the loaded micro-Al2O3 mass of 0.36-3.18 mg is shifted to 102.9-101.2 nm, respectively, while it is shifted to 98.9-97.8 nm at the loaded nano-TiO2 mass of 0.92-1.78 mg, respectively. That is, the shift of d(pa50) due to solid particle loading is small if the PENS is not overloaded. Both NPs and RPM concentrations were found to agree well with those of the IOSH respirable cyclone and MOUDI. By using the present PENS, the collected samples can be further analyzed for chemical species concentrations besides gravimetric analysis to determine the actual exposure concentrations of ENMs in both RPM and NPs fractions in workplaces, which are often influenced by the background or incident pollution sources.
Patient-oriented simulation based on Monte Carlo algorithm by using MRI data
(2012-04-17)
Chuang, Ching-Cheng
;
Lee, Yu-Tzu
;
Chen, Chung-Ming
;
Hsieh, Yao-Sheng
;
Liu, Tsan-Chi
Background: Although Monte Carlo simulations of light propagation in full segmented three-dimensional MRI based anatomical models of the human head have been reported in many articles. To our knowledge, there is no patient-oriented simulation for individualized calibration with NIRS measurement. Thus, we offer an approach for brain modeling based on image segmentation process with in vivo MRI T1 three-dimensional image to investigate the individualized calibration for NIRS measurement with Monte Carlo simulation. Methods: In this study, an individualized brain is modeled based on in vivo MRI 3D image as five layers structure. The behavior of photon migration was studied for this individualized brain detections based on three-dimensional time-resolved Monte Carlo algorithm. During the Monte Carlo iteration, all photon paths were traced with various source-detector separations for characterization of brain structure to provide helpful information for individualized design of NIRS system. Results: Our results indicate that the patient-oriented simulation can provide significant characteristics on the optimal choice of source-detector separation within 3.3 cm of individualized design in this case. Significant distortions were observed around the cerebral cortex folding. The spatial sensitivity profile penetrated deeper to the brain in the case of expanded CSF. This finding suggests that the optical method may provide not only functional signal from brain activation but also structural information of brain atrophy with the expanded CSF layer. The proposed modeling method also provides multi-wavelength for NIRS simulation to approach the practical NIRS measurement. Conclusions: In this study, the three-dimensional time-resolved brain modeling method approaches the realistic human brain that provides useful information for NIRS systematic design and calibration for individualized case with prior MRI data.
酸化プラセオジムを備えた誘電体、酸化プラセオジムを備えたトランジスタ及びその製造方法
(2012-04-19)
張翼
;
林岳欽
【課題】酸化プラセオジムの誘電体、酸化プラセオジムを備えたトランジスタ及びその製造方法を提供し、以って半導体素子のリーク電流及び等価酸化物膜厚の過大の問題を解決すること。【解決手段】本発明では、酸化プラセオジムを備えたトランジスタは、少なくとも一つのIII－Ｖ族基板と、一つのゲート誘電層と、一つのゲート電極とを含む。また、III－Ｖ族基板にゲート誘電層が設けられ、ゲート誘電層にゲート電極が設けられ、誘電層は酸化プラセオジム（ＰｒxＯy）である。本発明は、誘電層材料として高誘電率及び高エネルギーギャップを備えた酸化プラセオジム（Ｐｒ6Ｏ11）を用いることにより、リーク電流を有効に抑制する外、更にIII－Ｖ族材料を基板とした素子の等価酸化膜厚（ＥＯＴ）を薄くさせることもできる。【選択図】図４
SPATIALLY PRE-PROCESSED TARGET-TO-JAMMER RATIO WEIGHTED FILTER AND METHOD THEREOF
(2012-04-19)
HU JWU-SHENG
;
LEE MING-TANG
The present invention provides a spatially pre-processed target-to-jammer ratio weighted filter and a method thereof, which uses two microphones to receive audio signals. The audio signals are divided into a plurality of sinusoidal waves by a fast Fourier transform (FFT) module, and a beamformer uses the sinusoidal waves to generate beamformed signals. A reference generator generates at least one reference signal. The beamformed signals and reference signals are used to work out power spectral densities (PSD), and a target-to-jammer ratio (TJR) is worked out with the power spectral densities. TJR is used to determine whether a sound source exists. According to the determination result, a noise estimator is switched to eliminate noise from the beamformed signals and generate output signals. An inverse fast Fourier transform (IFFT) module recombines the output signals and then outputs the recombined signals.
CHIP-TO-CHIP MULTI-SIGNALING COMMUNICATION SYSTEM WITH COMMON CONDUCTIVE LAYER
(2012-04-19)
SU Chau-Chin
;
Ho Ying-Chieh
;
Huang Po-Hsiang
A chip-to-chip multi-signaling communication system with common conductive layer, which comprises a first chip, a second chip, and a common conductive layer, is disclosed. The first chip has at least a first metal pad and a second metal pad. The second chip has at least a first metal pad and a second metal pad. The common conductive layer is to a conductive material and glued directly to the first chip and the second chip. Wherein, the first metal pad of the second chip is aligned with the first metal pad of the first chip for receiving the signal from the first metal pad of the first chip through the common conductive layer. The interference generated by other pads of the first and the second chips is suppressed by the design of the pads and the common conductive layer.
Light-emitting diodes on curved ceramic substrate with primary optics for modification of luminous intensity
(2012-04-20)
Wei, An-Chi
;
Sze, Jyh-Rou
;
Chern, Jyh-Long
;
光電工程學系
;
Department of Photonics
Unlike the conventional light-emitting diode (LED) luminaire with a planar substrate and only the forward emission, the proposed LED luminaire with a curved ceramic substrate can perform both the forward and the backward emissions and inherits the merits of good heat-dissipation and low cost from the ceramic substrate. Assembled with the proper primary optics, an illustrated LED bulb has been designed, fabricated and measured. The measured luminous intensity of the LED bulb has shown the backward emission and designed distribution with the beam-angle of 133 deg. To broaden the application areas, such a LED bulb on a curved substrate has been modularized as a streetlight. The measured results of the proposed streetlight have shown that the beam angle of the luminous intensity and the luminaire efficiency are 132 deg and 86%, respectively. Meanwhile, its luminous characteristics also fit the Chinese standard for lighting design of urban roads. (c) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JPE.2.026501]
Generation of large orbital angular momentum from superposed Bessel beams corresponding to resonant geometric modes
(2012-04-20)
Chen, Y. F.
;
Lin, Y. C.
;
Zhuang, W. Z.
;
Liang, H. C.
;
Su, K. W.
We theoretically verify that a coherent superposition of nearly degenerate Bessel beams characterizes the family of resonant geometric modes in circular billiards. With the ray-wave correspondence, we experimentally exploit a large-aperture cylindrical waveguide to generate the resonant geometric modes with large orbital angular momentum. Furthermore, the free-space propagation of the geometric modes emerging from the cylindrical waveguide is demonstrated to display the transient dynamics of the coherent states released from a circular quantum billiard.
交大e-News第116期
(2012-04-20)
Secretariat
;
國立交通大學秘書室
動態調整無線網路裝置之休眠／喚醒時程的系統及其方法
(2012-04-21)
林佳燕
;
趙禧綠
;
蔡慈真
一種動態調整無線網路裝置之休眠/喚醒時程的系統及其方法。該系統包含有至少一基地台及至少一無線網路裝置。該基地台藉由該方法來適當地延後並合併資料傳送，以動態調整休眠/喚醒時程，進而讓無線網路裝置可以在一段調整過的喚醒時程中完成資料傳送後，進入休眠模式。本發明可在滿足服務品質需求的情況下，降低行動裝置端喚醒訊框的個數。
發光二極體結構及其製造方法
(2012-04-21)
張俊彥
;
楊宗熺
本發明係提供一種發光二極體(LED)結構，該發光二極體係包含一四族半導體構成之基板，一AlN成核層，形成於該四族基板上，一GaN磊晶層，形成於該AlN成核層上，一分散式布拉格反射鏡(DBR)多層結構，形成於該圖型化之GaN磊晶層上，以及一LED作用層結構，形成於該DBR多層結構上。
適用於資料切換多工之方法及裝置
(2012-04-21)
王忠炫
;
李順吉
一種適用於資料切換的多工方法，包括輸入一連續資料，其中此資料包括多個超級訊框，且每一個超級訊框包含多個框架。區分這些超級訊框成多個奇數部份及多個偶數部份之超級訊框。重新排列每一個奇數部份之超級訊框所包含之多個框架，其排列方式為依據其包含之這些框架所需求的位元錯誤率(BER)由大到小或由小到大排列。重新排列每一個偶數部份之超級訊框所包含之多個框架，其排列方式為依據其包含之框架所需求的位元錯誤率由小到大或由大到小排列。以及使用一編碼器對重新排列過後的超級訊框進行編碼。
看護系統
(2012-04-21)
蔡奇謚
;
黃富聖
;
林振暘
;
林志昇
;
陳俊瑋
本發明之看護系統可透過環境中的遍佈式感測網路定位出被看護者所在的位置，即時偵測到被看護者是否發生意外，並發送訊息通知家屬或醫護人員，自主式機器人主動移動至被看護者身邊，傳送即時影像至遠端的電腦或PDA，家屬或醫護人員能快速得知被看護者的情況，讓發生緊急狀況的被看護者能儘快得到救援。
實現輸出具有三倍頻正交信號之電路及方法
(2012-04-21)
郭建男
;
陳煥昇
一種實現輸出具有三倍頻正交信號之電路與方法，係應用於相位正交之二個輸入信號，其先利用倍頻器接收該二個輸入信號並分別產生二個倍頻信號，再藉由混波器將相對應的輸入信號以及該倍頻信號進行混波，俾分別產生具有頻率為輸入信號之頻率之三倍且相位正交之二個輸出信號，藉此，無需甚大之輸入信號振幅，即可提供功率消耗較低、頻寬範圍大且可實現為任意製程上之高頻信號源之三倍頻正交信號。
A new method for investigating infrared spectra of protonated benzene (C6H7+) and cyclohexadienyl radical (c-C6H7) using para-hydrogen
(2012-04-21)
Bahou, Mohammed
;
Wu, Yu-Jong
;
Lee, Yuan-Pern
;
應用化學系
;
應用化學系分子科學碩博班
We use protonated benzene (C6H7+) and cyclohexadienyl radical (c-C6H7) to demonstrate a new method that has some advantages over other methods currently used. C6H7+ and c-C6H7 were produced on electron bombardment of a mixture of benzene (C6H6) and para-hydrogen during deposition onto a target at 3.2 K. Infrared (IR) absorption lines of C6H7+ decreased in intensity when the matrix was irradiated at 365 nm or maintained in the dark for an extended period, whereas those of c-C6H7 increased in intensity. Observed vibrational wavenumbers, relative IR intensities, and deuterium isotopic shifts agree with those predicted theoretically. This method, providing a wide spectral coverage with narrow lines and accurate relative IR intensities, can be applied to larger protonated polyaromatic hydrocarbons and their neutral species which are difficult to study with other methods. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3703502]
南寮海風　吹動熱情肚皮舞
(2012-04-22)
林儀
;
Department of Communication and Technology
;
傳播與科技學系
新竹雖然被許多人視為一個小小的科技城，但是只要願意放下繁雜的工作，在優閒的假日午後到戶外走走，就可以找到一些不一樣的小驚喜。
總編輯的話
(2012-04-22)
張繼云
;
Department of Communication and Technology
;
傳播與科技學系
第一三三期喀報共有二十四篇文章，經過一段時間的累積，同學們對於多媒體的應用漸為熟悉，本周有十一篇文字報導、八個flash作品、三個圖片故事、一則廣播新聞與一則影像創作，內容非常豐富多元。
將的汙名　來自何方
(2012-04-22)
陳燕珩
;
Department of Communication and Technology
;
傳播與科技學系
八家將是台灣民俗廟宇活動的一部份，要延續這些傳統邊緣文化，除了面臨經濟、世代交替及文化轉型等多面向問題，社會長期以來對家將文化的汙名化，更導致八家將的負面形象始終難以翻轉，成為台灣傳統藝陣發展中的限制。
金錢的魔力　人民的力量
(2012-04-22)
陳祐元
;
Department of Communication and Technology
;
傳播與科技學系
《A錢大玩家》跟《憤怒的葡萄》皆是同名書籍改編的電影，乍看之下是兩部毫無關係的作品，但是電影中描述的觀點，全都圍繞著金錢與生活，又有幾分神似。
觸動我心的音樂旅程
(2012-04-22)
劉玉蘋
;
Department of Communication and Technology
;
傳播與科技學系
從開始接觸音樂到現在，對音樂產生種種的愛和糾結，我的音樂之旅實在值得回味。
韓式獨立音樂捎來輕韓風
(2012-04-22)
朱筱微
;
Department of Communication and Technology
;
傳播與科技學系
韓國獨立音樂的發展，在韓國高度工業化的流行文化體系中，得到良好的保護與推廣。眾多獨立樂團在學校中蓬勃發展，進而至首爾各地的咖啡館、俱樂部與夜店等年輕人的聚集地，藉由表演發跡。