Frequency switchable dual-band branch-line coupler

In this paper, silicon switches are implemented in the design of frequency switchable dual-band branch-line coupler. Frequency switching is achieved by increasing the power of the laser applied to the highly resistive silicon wafer and changing the properties of silicon under optical illumination. The advantages of this approach are high-speed switching, electromagnetic transparency (no interference) and thermal and electrical isolation between the coupler and the control circuit. A frequency shift of 35% and 10% has been achieved from all switches off to all switches on in lower (900 MHz) and upper (1800 MHz) frequency bands, respectively

An optically reconfigurable dual-band branch-line coupler with artificial transmission lines

This paper demonstrates switches that achieved a frequency shift of 30% from all switches off to all switches on in both frequency bands. This study shows the advantages of this approach such as high-speed switching, electromagnetic transparency, and thermal and electrical isolation between the coupler and the control circuit. The use of the artificial transmission lines significantly decreases the overall size of the circuit

General Equations for the Induced Phase Shift in Resonant Electro-Optic Modulators

We derive general equations to calculate the electrooptically induced optical phase shift in resonantly enhanced modulators. The equations are useful in designing modulator electrodes with optimal length and optimal mismatch between electrical and optical velocities. We demonstrate the existence of an optimal velocity mismatch depending on the resonant mode used.Peer Reviewe

Investigating factors affecting photoconductive microwave switch performance using 3D em simulation

A series of 3D EM simulation models are presented in order to determine the effect that conductivity profile, passivation layer and connection method have on the transmission performance of a photoconductive microwave switch. The use of 3D EM simulation can help quantify the benefit and impact of different approaches before the manufacture stage. The aim is to find methods to reduce insertion loss of the switch to provide maximum efficiency when the device is integrated into reconfigurable applications. Results show improvement to the transmission is possible by altering passivation thickness and designing optical feed to maintain signal planarity

Dynamic scheduling of maintenance activities under uncertainties.

International audienceCompetencies management in the industry is one of the most important keys in order to obtain good performance with production means. Especially in maintenance services field where the dierent practical knowledges or skills are their working tools. We address, in this paper, the both assignment and scheduling problem that can be found in a maintenance service. Each task that has to be performed is characterized by a competence level required. Then, the decision problem of assignment and scheduling lead to find the good resource and the good time to do the task. For human resources, all competence levels are dierent, they are considered as unrelated parallel machines. Our aim is to assign dynamically new tasks to the adequate resources by giving to the maintenance expert a choice between the robustest possibilities

ANALISIS FOUR WAVE MIXING DENGAN PENGUAT SEMICONDUCTOR OPTICAL AMPLIFIER PADA JARINGAN DENSE WAVELENGTH DIVISION MULTIPLEXING

Four Wave Mixing Four Wave Mixing (FWM) adalah suatu efek ketidaklinieran fiber optik. FWM dapat diminimalkan pada sistem dense wavelength division multiplexing dengan menggunakan amplifier Semiconductor Optical Amplifier (SOA) dengan mengatur parameter SOA, yaitu Optical Confinement Factor (OCF) dan differential gain. Penelitian ini menunjukan differential gain pada 3,0 x 10-20 m 2 menghasilkan level daya FWM minimal. Nilai parameter OCF berbanding lurus terhadap level daya FWM dan bit erro rate. Semakin besar OCF, semakin besar pula level daya FWM dan bit error rate yang dihasilkan, sehingga dapat menurunkan kinerja sistem. Nilai OCF maksimal yang dapat diberikan kepada sistem adalah 0,7 dengan Bit error rate 5,73 x 10-10 untuk Postline, 9,35 x 10-14 untuk Inline, dan 9,28 x 10-14 untuk Preline. Kata kunci : Dense Wavelength Division Multiplexing, Differential Gain, Four Wave Mixing, Optical Confinement Factor, Semiconductor Optical Amplifier

Protein, amino acid, and peptide supplementation for the treatment of sarcopaenia

Sarcopaenia is an age-related disease affected by many factors, nutrition being one. Reduced protein intake and decreased diet quality are correlated with sarcopaenia. Protein, amino acid, or peptide supplementation is a commonly used clinical practice to increase protein intake. However, whether supplementation plays a key role in preventing and treating sarcopaenia and whether it needs to be combined with other interventions is worthy of study. This review focuses on protein, amino acid, and peptide supplementation for the prevention and treatment of sarcopaenia

［資料］第19回・第20回総合学術文化学会学術研究会の報告

第19回学術研究会 ・浅野　麗「石牟礼道子「詠嘆へのわかれを」が目指すこと」第20回学術研究会 ・安形　輝「亞書の謎」・小野　永貴「アクティブ・ラーニングを促進する学習環境づくりと授業支援の実践」・小川　直之「『トリスタンとイズー』におけるドラゴン