Generation of Geometric Extra Phase and Accompanying Temporal Effects in Asymmetric Optically Compensated IPS-LCDs and FFS-LCDs

This paper reports the generation of an extra phase and the accompanying temporal effects in an asymmetric optically compensated in-pane-switching (IPS) liquid crystal (LC) system and a fringe-field-switching (FFS) liquid crystal display (LCD) exhibiting a twofold faster response speed in the switching-off process compared with that in single and symmetric IPS-LCDs and FFS LCDs for the first time. To explain the experimental results, we derived an approximate analytical formula for the optical output intensity that includes an extra phase advancement and conducted simulations to achieve normally black operation using a dynamic optical retarder.

Терагерцовое стимулированное излучение при оптическом резонансном возбуждении германия, легированного мелкими донорами

The mechanisms responsible for terahertz stimulated radiation under resonant intracenter excitation of shallow donors in bulk germanium are considered to be the inversion laser mechanism (ILM) and electron stimulated Raman scattering (e-SRS). The e-SRS cross-section was estimated in the case of resonant excitation of odd levels of a shallow arsenic donor in germanium. The output intensity under resonant excitation of germanium doped with arsenic is calculated. It is shown that at an intensity exceeding the threshold for e-SRS, there should be a competition of mechanisms leading to a decrease in the intensity of ILM, which can be detected by the dependence of the output intensity on time.

Multiple Filamentation Effects on THz Radiation Pattern from Laser Plasma in Air

An experimental study of few filaments interaction impact on the terahertz radiation pattern has demonstrated that interaction of two close propagating beams leads to formation of a superfilament-like structure with on-axis terahertz yield. Mutual delay between two beamlets tilts the output intensity front of THz emission.

Detection of Emanated Light at the Modified Clad Region (Sno2) of the Optical Fiber for Methanol Gas Sensing

A leakage detecting sensor (radiation mode (or) double fiber mode) is proposed to monitor the light rays propagates from the surface of the modified clad region (SnO2 ) of the optical fiber. The output intensity increases and decreases for the varying gas concentration (0-500 ppm) with the presence of different gases (methanol, ethanol, acetone and ammonia) at room temperature. The received output intensity from the clad modified surface increases for ammonia and methanol, whereas, it decreases for acetone and ethanol gases for the increase in the gas concentration. However, in the transmitting mode (single fiber mode) the output light intensity decreases for all the gases with varying gas concentration. The output gas sensitivity of the proposed sensor (double fiber mode) is compared with the transmitting mode sensor and the sensor shows superior response for methanol over other gases. The dynamic characteristics of the sensor are reported.

Effect of Time Delay on Laser-Triggered Discharge Plasma for a Beyond EUV Source

We demonstrate the beyond extreme ultraviolet (BEUV) emission by a laser-triggered discharge source with the laser-current delay between 0.6 µs and 3 µs. The spectra at different electron temperatures are simulated theoretically, and the spectra at different laser-current delays are measured experimentally. The theoretical and experimental results show that the lower vapor velocity at longer laser-current delay time is beneficial for increasing the steady-state time of plasma at high temperature, thereby increasing the output intensity and spectral purity of 6.76 nm. The radiation intensity of 6.76 nm (0.6% bandwidth) increases about 240% when the delay increases from 0.6 to 3 μs.

Dynamical effects on superradiant THz emission from an undulator

Superradiant emission occurs when ultra-relativistic electron bunches are compressed to a duration shorter than the wavelength of the light emitted by them. In this case the different electron contributions to the emitted field sum up in phase and the output intensity scales as the square of the number of electrons in the bunch. In this work the particular case of superradiant emission from an undulator in the THz frequency range is considered. An electron bunch at the entrance of a THz undulator setup has typically an energy chirp because of the necessity to compress it in magnetic chicanes. Then, the chirped electron bunch evolves passing through a highly dispersive THz undulator with a large magnetic field amplitude, and the shape of its longitudinal phase space changes. Here the impact of this evolution on the emission of superradiant THz radiation is studied, both by means of an analytical model and by simulations.

Penentuan Pemberian Reward Bagi Karyawan Berprestasi di Lingkungan Universitas Indo Global Mandiri dengan Algoritma C45

<p class="SammaryHeader" align="center"><strong><em>Abstract</em><em> </em></strong></p><p><em>Determination of the top performers in the Environment University of Indo Global Mandiri is determined based on an assessment of performance. The performance assessment is carried out consisting of knowledge of the work, creativity, planning, implementation instructions, execution of the job descriptions, work quality, cooperation and attitudes toward other employees, initiative, reliability, presence, attitude work, perseverance, and honesty. C45 algorithm is an algorithm that is used to form the decision tree. With the decision tree is generated from the algorithm C45 can build a decision support system that has the ability to analyze the selection of outstanding employee, in which each of the criteria employees compared to one another so as to provide output intensity value priorities and produce a system that provides an assessment of each employee so that will get the most feasible given the employee reward or appreciation.</em><em> </em></p><p><strong><em>Keywords :</em></strong><em> C45 Algorithms, Decision Trees, Outputs, Rewards</em></p><p align="center"><em> </em></p><p align="center"><strong><em>Abstrak</em></strong><strong><em> </em></strong></p><p><em>Penentuan karyawan berprestasi di Lingkungan Universitas Indo Global Mandiri ditentukan berdasarkan penilaian kinerja. Penilaian kinerja yang dilakukan terdiri dari pengetahuan tentang pekerjaan, kreativitas, perencanaan, pelaksanaan instruksi, pelaksanaan deskripsi tugas, kualitas kerja, kerjasama dan sikap terhadap karyawan lain, inisiatif, kehandalan, kehadiran, sikap pekerjaan, keuletan, dan kejujuran. Algoritma C45 merupakan algoritma yang digunakan untuk membentuk pohon keputusan. Dengan pohon keputusan yang dihasilkan dari Algoritma C45 dapat membangun sebuah sistem pendukung keputusan yang mempunyai kemampuan menganalisa pemilihan karyawan berprestasi, dimana masing-masing kriteria karyawan dibandingkan satu dengan yang lainnya sehingga memberikan output nilai intensitas prioritas dan menghasilkan suatu sistem yang memberikan penilaian terhadap setiap karyawan sehingga akan mendapatkan karyawan yang paling layak diberi reward atau penghargaan.</em></p><p><strong><em>Kata kunci</em></strong><em>: Algoritma C45, Pohon Keputusan, Outputs, Rewards</em></p>

Forecasting Events in the Chaotic Dynamics of a Fiber Laser

Being able to forecast events is of great importance in many fields, from brain behavior to earthquakes or stock markets. Because each dynamical system has intrinsic features, different statistical tools have to be used for each system. Here we study the time series of the output intensity of a fiber laser with an ordinal patterns analysis, and we look for temporal correlations in order to statistically forecast the most intense events. We set two thresholds, a low one and a high one, to distinguish between low intensity versus high intensity events. We find that when the time series is performing events below the low threshold it shows some preferred temporal patterns before performing events above a high threshold.