Browsing by Issue Date, starting with "2011-02-16"

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耳機聲學模擬系統及最佳化模擬方法
(2011-02-16)
白明憲
;
郭育志
本發明係揭示一種耳機聲學模擬系統及其最佳化模擬方法，其中耳機聲學模擬系統具有耳機前端模擬電路與後端模擬電路，二者係分別模擬耳機前腔體與後音腔等的聲學環境，並且由人工耳模擬電路分別連接耳機前端模擬電路與後端模擬電路，因此即可從人工耳模擬電路之阻抗變化來瞭解耳機腔體內頻率響應的情況。此外，本發明之耳機聲學系統之最佳化模擬方法係以模擬退火法演算法來取得腔體最佳化之參數解，並以耳機聲學模擬系統預測耳機腔體最佳化後之聲壓曲線結果。
Ni2+-Enhanced Charge Transport via pi-pi Stacking Corridor in Metallic DNA
(2011-02-16)
Tseng, Shin-Hua
;
JangJian, Peng-Chung
;
Tsai, Chuan-Mei
;
Cheng, Tsai-Mu
;
Chu, Hsueh-Liang
The mechanism underlying DNA charge transport is intriguing. However, poor conductivity of DNA makes it difficult to detect DNA charge transport. Metallic DNA (M-DNA) has better conducting properties than native DNA. Ni2+ may chelate in DNA and thus enhance DNA conductivity. On the basis of this finding, it is possible to reveal the mechanisms underlying DNA charge transport. The conductivity of various Ni-DNA species such as single-stranded, full complement, or mismatched sequence molecules was systematically tested with ultraviolet absorption and electrical or chemical methods. The results showed that the conductivity of single-stranded Ni-DNA (Ni-ssDNA) was similar to that of a native DNA duplex. Moreover, the resistance of Ni-DNA with a single basepair mismatch was significantly higher than that of fully complementary Ni-DNA duplexes. The resistance also increased exponentially as the number of mismatched basepairs increased linearly after the tunneling current behavior predicted by the Simmons model. In conclusion, the charges in Ni2+-doped DNA are transported through the Ni2+-mediated pi-pi stacking corridor. Furthermore, Ni-DNA acts as a conducting wire and exhibits a tunneling barrier when basepair mismatches occur. This property may be useful in detecting single basepair mismatches.
音訊分離裝置及其操作方法
(2011-02-16)
李宜軒
;
蔡德明
本發明係揭露一種音訊分離裝置及其操作方法。此音訊分離裝置同時使用盲訊號分離和噪音抑制之兩種機制，且僅使用一支麥克風錄製混合的聲音訊號。噪音抑制處理後的訊號與錄製的聲音訊號同時進行盲訊號分離，此方式不僅能避免使用麥克風陣列錄製訊號所產生的空間混疊效應，也能有效還原噪音抑制處理所遺失的語音片段，幫助聽覺障礙者分離目標語音。
基於鄰近覺察之同時傳輸的媒介存取控制協定裝置與方法
(2011-02-16)
王蒞君
;
王中瑋
一種基於鄰近覺察之同時傳輸的媒介存取控制協定裝置與方法，係確認在一無線網路下是否多條通訊連線可以同時被建立，其中一鄰居探索模組使得此無線網路上的每一節點能夠取得它的多步鄰居之範圍內的拓樸資訊，一跨階層觀察模組整合實體與虛擬載波感測並觀察此無線網路下的一媒介存取控制層裡的一控制框的位址欄位，並且比較此控制框之位址欄位裡的資訊與藉由此鄰居探索模組取得的拓樸資訊，來確認此多條通訊連線是否可以被建立以達到同時傳輸。
Ni(2+)-Enhanced Charge Transport via pi-pi Stacking Corridor in Metallic DNA
(2011-02-16)
Tseng, Shin-Hua
;
JangJian, Peng-Chung
;
Tsai, Chuan-Mei
;
Cheng, Tsai-Mu
;
Chu, Hsueh-Liang
The mechanism underlying DNA charge transport is intriguing. However, poor conductivity of DNA makes it difficult to detect DNA charge transport. Metallic DNA (M-DNA) has better conducting properties than native DNA. Ni(2+) may chelate in DNA and thus enhance DNA conductivity. On the basis of this finding, it is possible to reveal the mechanisms underlying DNA charge transport. The conductivity of various Ni-DNA species such as single-stranded, full complement, or mismatched sequence molecules was systematically tested with ultraviolet absorption and electrical or chemical methods. The results showed that the conductivity of single-stranded Ni-DNA (Ni-ssDNA) was similar to that of a native DNA duplex. Moreover, the resistance of Ni-DNA with a single basepair mismatch was significantly higher than that of fully complementary Ni-DNA duplexes. The resistance also increased exponentially as the number of mismatched basepairs increased linearly after the tunneling current behavior predicted by the Simmons model. In conclusion, the charges in Ni(2+)-doped DNA are transported through the Ni(2+)-mediated pi-pi stacking corridor. Furthermore, Ni-DNA acts as a conducting wire and exhibits a tunneling barrier when basepair mismatches occur. This property may be useful in detecting single basepair mismatches.
共平面天線單元及共平面天線
(2011-02-16)
陳富強
;
高誠隆
本發明係揭露一種共平面天線單元及共平面天線。其中利用獨特的後設材料(meta-material)性質，設計一個平衡式一維複合左右手(CRLH)洩漏波天線。以共平面波導為架構，利用金屬-絕緣體-金屬(Metal-insulator-Metal,MIM)電容及接地傳輸線來設計出共平面天線單元並實現一維縮短化複合左右手洩漏波天線。所設計的天線係採用平面印刷電路板技術所實現，且有輕薄短小與低姿態的潮流以及良好的天線輻射特性。
EARPHONE ACOUSTIC SIMULATION SYSTEM AND OPTIMAL SIMULATION METHOD OF THE SAME
(2011-02-17)
BAI, MINGSIAN R.
;
KUO, YU-CHIH
An earphone acoustic simulation system and an optimal simulation method of the same is disclosed. The earphone acoustic simulation system comprises an earphone front end simulation circuit and an earphone back end simulation circuit for simulating acoustic environment of a front cavity and a back cavity inside an earphone, and an artificial ear simulation circuit is connected respectively with the earphone front end simulation circuit and the earphone back end simulation circuit. Variation of an impedance of the artificial ear simulation circuit represents the frequency response in the earphone cavity. Besides, the optimal simulation of the earphone acoustic simulation system utilizes simulated annealing algorithm to obtain the optimal parameter of the earphone cavity, and anticipates the SPL curve related to the optimal earphone cavity through utilizing the earphone acoustic simulation system.
Apparatus And Method For Neighbor-Aware Concurrent Transmission Media Access Control Protocol
(2011-02-17)
Wang, Li-Chun
;
Wang, Chung-Wei
An apparatus and method for neighbor-aware concurrent transmission media access control (MAC) protocol is provided, which determines whether a plurality of communication connections may be established concurrently in a wireless network, where each node in the network obtains the topology information of its multi-hop neighbors via a neighbor discover module. A cross-layer observation module integrates the physical and virtual carrier sensing, observes the address field of a control frame of a MAC layer in the wireless network, and compares the address field information of the control frame against the topology information obtained by the neighbor discover module to determine whether a plurality of connections may be established for concurrent transmission.
COPLANAR ANTENNA UNIT AND COPLANAR ANTENNA
(2011-02-17)
Chen, Fu-Chiarng
;
Kao, Cheng-Lung
The present invention is related to a coplanar antenna unit and a coplanar antenna. By utilizing the unique properties of meta-material to design 1-D balanced CRLH leaky-wave antenna. The antenna can be realized with the coplanar antenna unit consisting of MIM capacitor and grounded inductor. In this invention, all proposed elements are implemented by planar print circuit broad, so the full-space switched beam scanning antenna has shorter length of leaky-wave antenna and good radiation performance.
Spatial and temporal EEG dynamics of dual-task driving performance
(2011-02-18)
Lin, Chin-Teng
;
Chen, Shi-An
;
Chiu, Tien-Ting
;
Lin, Hong-Zhang
;
Ko, Li-Wei
Background: Driver distraction is a significant cause of traffic accidents. The aim of this study is to investigate Electroencephalography (EEG) dynamics in relation to distraction during driving. To study human cognition under a specific driving task, simulated real driving using virtual reality (VR)-based simulation and designed dual-task events are built, which include unexpected car deviations and mathematics questions. Methods: We designed five cases with different stimulus onset asynchrony (SOA) to investigate the distraction effects between the deviations and equations. The EEG channel signals are first converted into separated brain sources by independent component analysis (ICA). Then, event-related spectral perturbation (ERSP) changes of the EEG power spectrum are used to evaluate brain dynamics in time-frequency domains. Results: Power increases in the theta and beta bands are observed in relation with distraction effects in the frontal cortex. In the motor area, alpha and beta power suppressions are also observed. All of the above results are consistently observed across 15 subjects. Additionally, further analysis demonstrates that response time and multiple cortical EEG power both changed significantly with different SOA. Conclusions: This study suggests that theta power increases in the frontal area is related to driver distraction and represents the strength of distraction in real-life situations.
道路角度估測系統及其方法
(2011-02-21)
陳宗麟
;
許齡元
一種道路角度估測系統及其方法，其中，該系統包含：一感測模組及一估測計算模組。該感測模組裝設於一移動體上以量測出一組包括一懸掛系統位移量、一側向加速度、一縱向速度及一橫擺角之系統量測參數。而該估測計算模組包括一擴增卡曼濾波器且具有實施一儲存記憶褪去法及一描述移動體動態方程式之功能，並用來接收該組系統量測參數、一組包括一假設傾斜角及一假設坡度角之待估參數，及一組包括一操縱角度、一油門力道值及一煞車力道值之操作參數的輸入，並產生一道路角度資訊。藉此，僅利用較少感測設備達成同時且精確的道路角度變化估測。
交大e-News第088期
(2011-02-21)
Secretariat
;
國立交通大學秘書室
Synthesis and Physicochemical Characterization of Carbon Backbone Modified [Gd(TTDA)(H2O)](2-) Derivatives
(2011-02-21)
Chang, Ya-Hui
;
Chen, Chiao-Yun
;
Singh, Gyan
;
Chen, Hsing-Yin
;
Liu, Gin-Chung
The present study was designed to exploit optimum lipophilicity and high water-exchange rate (k(ex)) on low molecular weight Gd(III) complexs to generate high bound relaxivity (r(1)(b)), upon binding to the lipophilic site of human serum albumin (HSA). Two new carbon backbone modified TTDA (3,6,10-tri(carboxymethyl)-3,6,10-triazadodecanedioic acid) derivatives, CB-TTDA and Bz-CB-TTDA, were synthesized. The complexes [Gd(CB-TTDA)(H2O)](2-) and [Gd(Bz-CB-TTDA)(H2O)](2-) both display high stability constant (log K-GdL = 20.28 and 20.09, respectively). Furthermore, CB-TTDA (log K-(Gd/Zn) = 4.22) and Bz-CB-TTDA (log K-(Gd/Zn) = 4.12) exhibit superior selectivity of Gd(III) against Zn(II) than those of TTDA (log K-(Gd/Zn) = 2.93), EPTPA-bz-NO2 (log K-(Gd/Zn) = 3.19), and DTPA (log K-(Gd/Zn) = 3.76). However, the stability constant values of [Gd(CB-TTDA)(H2O)](2-) and [Gd(Bz-CB-TTDA)(H2O)](2-) are lower than that of MS-325. The parameters that affect proton relaxivity have been determined in a combined variable temperature O-17 NMR and NMRD study. The water exchange rates are comparable for the two complexes, 232 x 10(6) s(-1) for [Gd(CB-TTDA)(H2O)](2-) and 271 x 10(6) s(-1) for [Gd(Bz-CB-TTDA)(H2O)](2-). They are higher than those of [Gd(TTDA)(H2O)](2-) (146 x 10(6) s(-1)), [Gd(DTPA)(H2O)](2-) (4.1 x 10(6) s(-1)), and MS-325 (6.1 x 10(6) s(-1)). Elevated stability and water exchange rate indicate that the presence of cyclobutyl on the carbon backbone imparts rigidity and steric constraint to [Gd(CB-TTDA)(H2O)](2-) and [Gd(Bz-CB-TTDA)(H2O)](2-). In addition, the major objective for selecting the cyclobutyl is to tune the lipophilicity of [Gd(Bz-CB-TTDA)(H2O)](2-). The binding affinity of [Gd(Bz-CB-TTDA)(H2O)](2-) to HSA was evaluated by ultrafiltration study across a membrane with a 30 kDa MW cutoff, and the first three stepwise binding constants were determined by fitting the data to a stoichiometric model. The binding association constants (K-A) for [Gd(CB-TTDA)(H2O)](2-) and [Gd(Bz-CB-TTDA)(H2O)](2-) are 1.1 x 10(2) and 1.5 x 10(3), respectively. Although the K-A value for [Gd(Bz-CB-TTDA)(H2O)](2-) is lower than that of MS-325 (K-A = 3.0 x 10(4)), the r(1)(b) value, r(1)(b) = 66.7 mM(-1) s(-1) for [Gd(Bz-CB-TTDA)(H2O)](2-), is significantly higher than that of MS-325 (r(1)(b) = 47.0 mM(-1) s(-1)). As measured by the Zn(II) transmetalation process, the kinetic stabilities of [Gd(CB-TTDA)(H2O)](2-), [Gd(Bz-CB-TTDA)(H2O)](2-), and [Gd(DTPA)(H2O)](2-) are similar and are significantly higher than that of [Gd(DTPA-BMA)(H2O)](2-) High thermodynamic and kinetic stability and optimized lipophilicity of [Gd(CB-TTDA)(H2O)](2-) make it a favorable blood pool contrast agent for MRI.
Synthesis and Physicochemical Characterization of Carbon Backbone Modified [Gd(TTDA)(H(2)O)](2-) Derivatives
(2011-02-21)
Chang, Ya-Hui
;
Chen, Chiao-Yun
;
Singh, Gyan
;
Chen, Hsing-Yin
;
Liu, Gin-Chung
The present study was designed to exploit optimum lipophilicity and high water-exchange rate (k(ex)) on low molecular weight Gd(III) complexs to generate high bound relaxivity (r(1)(b)), upon binding to the lipophilic site of human serum albumin (HSA). Two new carbon backbone modified TTDA (3,6,10-tri(carboxymethyl)-3,6,10-triazadodecanedioic acid) derivatives, CB-TTDA and Bz-CB-TTDA, were synthesized. The complexes [Gd(CB-TTDA)(H(2)O)](2-) and [Gd(Bz-CB-TTDA)(H(2)O)](2-) both display high stability constant (log K(GdL) = 20.28 and 20.09, respectively). Furthermore, CB-TTDA (log K((Gd/Zn)) = 4.22) and Bz-CB-TTDA (log K((Gd/Zn)) = 4.12) exhibit superior selectivity of Gd(III) against Zn(II) than those of TTDA (log K((Gd/Zn)) = 2.93), EPTPA-bz-NO(2) (log K((Gd/Zn)) = 3.19), and DTPA (log K((Gd/Zn)) = 3.76). However, the stability constant values of [Gd(CB-TTDA)(H(2)O)](2-) and [Gd(Bz-CB-TTDA)(H(2)O)](2-) are lower than that of MS-325. The parameters that affect proton relaxivity have been determined in a combined variable temperature (17)O NMR and NMRD study. The water exchange rates are comparable for the two complexes, 232 x 10(6) s(-1) for [Gd(CB-TTDA)(H(2)O)](2-) and 271 x 10(6) s(-1) for [Gd(Bz-CB-TTDA)(H(2)O)](2-). They are higher than those of [Gd(TTDA)(H(2)O)](2-) (146 x 10(6) s(-1)), [Gd(DTPA)(H(2)O)](2-) (4.1 x 10(6) s(-1)), and MS-325 (6.1 x 10(6) s(-1)). Elevated stability and water exchange rate indicate that the presence of cyclobutyl on the carbon backbone imparts rigidity and steric constraint to [Gd(CB-TTDA)(H(2)O)](2-) and [Gd(Bz-CB-TTDA)(H(2)O)](2-). In addition, the major objective for selecting the cyclobutyl is to tune the lipophilicity of [Gd(Bz-CB-TTDA)(H(2)O)](2-). The binding affinity of [Gd(Bz-CB-TTDA)(H(2)O)](2-) to HSA was evaluated by ultrafiltration study across a membrane with a 30 kDa MW cutoff, and the first three stepwise binding constants were determined by fitting the data to a stoichiometric model. The binding association constants (K(A)) for [Gd(CB-TTDA)(H(2)O)](2-) and [Gd(Bz-CB-TTDA)(H(2)O)](2-) are 1.1 x 10(2) and 1.5 x 10(3), respectively. Although the K(A) value for [Gd(Bz-CB-TTDA)(H(2)O)](2-) is lower than that of MS-325 (K(A) = 3.0 x 10(4)), the r(1)(b) value, r(1)(b) = 66.7 mM(-1) s(-1) for [Gd(Bz-CB-TTDA)(H(2)O)](2-), is significantly higher than that of MS-325 (r(1)(b) = 47.0 mM(-1) s(-1)). As measured by the Zn(II) transmetalation process, the kinetic stabilities of [Gd(CB-TTDA)(H(2)O)](2-), [Gd(Bz-CB-TTDA)(H(2)O)](2-), and [Gd(DTPA)(H(2)O)](2-) are similar and are significantly higher than that of [Gd(DTPA-BMA)(H(2)O)](2-) High thermodynamic and kinetic stability and optimized lipophilicity of [Gd(CB-TTDA)(H(2)O)](2-) make it a favorable blood pool contrast agent for MRI.
An electrically tunable focusing liquid crystal lens with a built-in planar polymeric lens
(2011-02-21)
Lin, Hung-Chun
;
Lin, Yi-Hsin
;
光電工程學系
;
Department of Photonics
An electrically tunable focusing liquid crystal (LC) lens with a built-in planar polymeric lens with a short focal length (similar to 4.41 to 8.82 cm) is demonstrated. The focal length of the LC lens is contributed by two parts: one is the LC layer and the other is planar polymeric layer. In the image system, the object can be continuously imaged by the LC lens when the object is at the objective distance from 360 to 17 cm as the voltage is switched from 0 to 35 V(rms). The image performance is also demonstrated. The applications are cell phones, and cameras (C) 2011 American Institute of Physics. [doi: 10.1063/1.3559622]
Direct measurement of versatile surface plasmon polaritons excited by split polarization
(2011-02-21)
Lan, Tzu-Hsiang
;
Ho, Chen-Yeh
;
Tien, Chung-Hao
;
光電工程學系
;
顯示科技研究所
We report on the concept, generation, and observation of versatile excited surface plasmon polariton (SPP) patterns via focused split polarization. Unlike the conventional subwavelength features such as holes array, grating, or other protrusion to satisfy the phase matching condition for SPP excitation, we utilized a structured focus to form either counterpropagating interference or a multiple casting plasmonic pattern by means of the arrangement of split polarization and corresponding focus position. The characteristics of the near-field SPP image are in close agreement with the finite-difference time-domain calculation and confirm its feasibility associated with SPP excitations in many areas. (C) 2011 American Institute of Physics. [doi:10.1063/1.3552673]
Transport current carrying superconducting film with periodic pinning array under strong magnetic fields
(2011-02-22)
Rosenstein, B.
;
Shapiro, I.
;
Shapiro, B. Ya.
;
電子物理學系
;
Department of Electrophysics
The transport current carrying dissipative (flux flow) and dissipationless (pinned) vortex configurations and their dynamics are investigated numerically in the framework of the time-dependent Ginzburg-Landau approach. Assuming that magnetic induction is nearly uniform, the model is generalized to include strong inhomogeneous electric fields. Hexagonal array nanoholes of the size of coherence length and density n(pin) was considered for various filling factors [defined as f = B/(Phi(0)n(pin))]. The vortex depinning is closely associated with the appearance of a strongly varying electric field. For the matching field, f = 1, the critical current is maximal and the transition to the resistive state occurs as a coherent depinning of the entire vortex lattice. For a system with interstitial vortices, f > 1, the mechanism of depinning depends on the current direction with respect to the pinning array. There are two qualitatively distinct geometries: the obstacle and channel geometries. In the obstacle geometry lines of interstitial vortices are blocked by strongly pinned vortices, while in the channel geometry the lines move unimpeded confined in channels. It was found that slightly above the critical current the trajectories of the moving vortices are not straight, but rather acquire a snakelike shape enveloping the system of pins. In contrast to f = 1, the transition to a resistive state is not coherent and is going through formation of "snakelike" vortex trajectories. The critical current in the obstacle geometry is significantly larger than in the channel one.
Sensing device
(2011-02-22)
Cheng
;
Pi-Ying
;
Wong
;
Kian-Poh
The present invention discloses a sensing device, wherein a hemispherical container containing a liquid dielectric, and the hemispherical container has more than two pairs of electrodes, and the liquid dielectric can trigger the conduction states of the electrodes. A corrosion-resistant material envelops the container. A precision valve is arranged in the container and used to adjust the level of the liquid dielectric and the sensitivity of the sensing device. A buffer necking part is also arranged in the container and used to prevent from non-expected vibration-induced contact between the electrodes and the liquid dielectric. A leakage-proof detection device envelops the hemispherical container, the liquid dielectric, the precision valve, and the buffer necking part and functions to prevent from the leakage of the liquid dielectric. Thus, the present invention can provide an adjustable multi-directional tilt-sensing device for level control.
ON-CHIP INDUCTOR STRUCTURE AND METHOD FOR MANUFACTURING THE SAME
(2011-02-24)
CHAO, TZU-YUAN
;
HSU, MING-CHIEH
;
CHENG, YU-TING
;
CHEN, CHIH
;
LIU, CHIEN-MIN
The present invention relates to a an on-chip inductor structure and a method for manufacturing the same. The an on-chip inductor structure according to the present invention comprises a substrate, a porous layer, a plurality of conductors, and an inductor. The porous layer is disposed on the substrate and has a plurality of voids; each of the plurality of conductors is disposed in the plurality of voids, respectively; and the inductor is disposed on the porous layer. Because the plurality of conductors is used as the core of the inductor, the inductance is increased effectively and the area of the an on-chip inductor is reduced. Besides the manufacturing method according to the present invention is simple and compatible with the current CMOS process, the manufacturing cost can be lowered.
SURFACE-EMITTING LASER DEVICE
(2011-02-24)
Chen, Shih-Wei
;
Lu, Tien-Chang
;
Kuo, Hao-Chung
;
Wang, Shing-Chung
A surface-emitting laser device includes: a substrate; a low refractive index layer with a refractive index nL and disposed on the substrate; a light emitting layered structure with a refractive index nH, where nH>nL, the light emitting layered structure being formed on the low refractive index layer and having first and second semiconductor layers and a multi-quantum well (MQW) disposed between the first and second semiconductor layers and capable of generating photons having a wavelength λ0; and a two-dimensional photonic crystal (2DPC) formed in the light emitting layered structure and having optical nanostructures arranged into a periodic pattern with a lattice constant a. The nanostructures extend from the first semiconductor layer through the MQW. The 2DPC has a normalized frequency, which is defined as a/λ0, ranging from 0.25 to 0.70.