Desain Intensitas Penerangan dengan Tipe Jenis Lampu untuk Kegitan Praktikum di Laboratorium Mesin Listrik dan Pengukuran

Lighting planning in a laboratory room is one of the factors in designing to produce good and energy efficient lighting. To carry out all activities in the room of a laboratory, sufficient lighting intensity is needed, so that it can be carried out optimally, especially with regard to practicum work carried out in the laboratory for the benefit of the learning process. In terms of quality, lighting in a room is in the form of strong lighting or illumination level. The purpose of this research is to design, identify and evaluate the recommended lighting intensity / quality with the lighting standards from the existing lamp data installed in the electrical and measurement laboratory. The results of the measurement research for the Electrical Machinery and Measurement Laboratory obtained that the average light intensity for the work point of the practicum table is 127 lux, so that the light intensity is still low according to the SNI 16 - 7062 - 2004 standard with a measuring point of even lighting distribution obtained by 137 lux. If the light intensity of a laboratory is not fulfilled, it will result in inconvenience for students in carrying out the measurement practice, especially for practicum electrical circuits by calculating the value of the ring resistor. For this reason, the intensity of lighting in the laboratory room must be designed to meet the recommended lighting standards for a laboratory, namely 300 lux, namely by adding the number of 8 points of TL Philips Lifemark 36W / 54-765 lamps,or 8 points of 25 W / 2600 lumens LED lamps, or 6 Philips CLF 55 W / 3465 lumen type light point.

DEVELOPMENT OF A MODEL LAMP BASED ON LED MATRIX

The work is devoted to the development of a lamp based on an LED matrix with varying chromaticity and illumination level. The following main components are used in the work: an addressable LED matrix WS2812b 1616 LED, Arduino Nano, a TTP223 touch button, a 5V 2A power supply. The basis for the lamp is a plumbing pipe with a diameter of 50 mm and a part of a pipe with a diameter of 40 mm; for the manufacture of a prototype, a matte shade from a conventional lamp was used. The working temperature of the matrix is from –25° to + 80° Celsius. Working at temperatures below – 25°, the tape may work poorly or not execute controller commands at all. For lighting effects and, in general, for the operation of the lamp, the code was written on the Arduino, and flashed into the Arduino Nano. The proposed lamp design can be used as decorative lighting for residential buildings.

Effect of Ambient Illumination, Screen Resolution and Zoom Level on Performance of Typing on Computers

Objective: This work aims to investigate effect of the ambient illumination, screen resolution and Zoom levels on visual-related task performance. The job used in this research is typing on computers. Speed of typing paragraph and typing quality were defined as the task performance. Background: In recent years, computers play a remarkable role in nearly everyone’s daily life. We use computers for various purposes and under a wide range of ambient illumination. High illumination level usually results in some problems. Adjusting screen resolution and zoom level are common solutions contra problems for visibility due to unsuitable illuminations. Method: Ambient illuminations were examined 114, 230, 340, 420 and 520 lx. Screen resolution scales were diverse to cover all range of regulate ability pliable by characteristics of the offering used; 768*1024, 720*1280 and 768*1366. Zoom levels was tested 50, 100, 150 and 200%. Results: Based on this study, can be found that, the more effective illumination level on average typing time was 340 followed by 420 lx. Average typing time decrease with increasing screen resolution, the minimum average typing time observed at 720*1280 and 168*1366 screen resolution. Change the zoom level of text show significant effect on typing time, which the average typing time decreases with increasing zoom level. The minimum typing time observed at 100 and 150% zoom level. Experimental results for all S/N ratio, mean, and standard deviation (real) response values show that, illumination level, screen resolution and zoom scale are the significant parameters among all controllable factors that influence the avearge typing time. Based on S/N Ratio the optimum parameters was 114 lx illumination level and 768*1024 screen Resolution and 50% zoom level. Based on standard deviation the optimum parameters was 114 lx illumination level and 768*1366 screen Resolution and 150% zoom level. Based on the means the optimum parameters was is 230lx illumination level and 768*1366 screen Resolution and 100% zoom level. Conclusion: The provision of suitable illumination, screen resolution and zoom levels that feedback to enhancing the performance of typing performance on computers. Application: This study can inform in-computer typing offices and policy makers concerned with human factors and work-study.

Effects of test experience, closed-arm wall color, and illumination level on behavior and plasma corticosterone response in an elevated plus maze in male C57BL/6J mice: a challenge against conventional interpretation of the test

The elevated plus maze test is a widely used test for assessing anxiety-like behavior and screening novel therapeutic agents in rodents. Previous studies have shown that a variety of internal factors and procedural variables can influence elevated plus maze behavior. Although some studies have suggested a link between behavior and plasma corticosterone levels, the relationships between them remain unclear. In this study, we investigated the effects of experience with a battery of behavioral tests, the wall color of the closed arms, and illumination level on the behavior and plasma corticosterone responses in the elevated plus maze in male C57BL/6J mice. Mice were either subjected to a series of behavioral tests, including assessments of general health and neurological function, a light/dark transition test, and an open field test, or left undisturbed until the start of the elevated plus maze test. The mice with and without test battery experience were allowed to freely explore the elevated plus maze. The other two independent groups of naïve mice were tested in mazes with closed arms with different wall colors (clear, transparent blue, white, and black) or different illumination levels (5, 100, and 800 lx). Immediately after the test, blood was collected to measure plasma corticosterone concentrations. Mice with test battery experience showed a lower percentage of open arm time and entries and, somewhat paradoxically, had lower plasma corticosterone levels than the mice with no test battery experience. Mice tested in the maze with closed arms with clear walls exhibited higher open arm exploration than mice tested in the maze with closed arms with black walls, while there were no significant differences in plasma corticosterone levels between the different wall color conditions. Illumination levels had no significant effects on any measure. Our results indicate that experience with other behavioral tests and different physical features of the maze affect elevated plus maze behaviors. Increased open arm time and entries are conventionally interpreted as decreased anxiety-like behavior, while other possible interpretations are considered: open arm exploration may reflect heightened anxiety and panic-like reaction to a novel situation under certain conditions. With the possibility of different interpretations, the present findings highlight the need to carefully consider the test conditions in designing experiments and drawing conclusions from the behavioral outcomes in the elevated plus maze test in C57BL/6J mice.

Fabrication, Illumination Dependent Electrical and Photovoltaic Properties of Au/BOD-Pyr/n-Si/In Schottky Diode

4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based BOD-Pyr compound was synthesized according to the literature and  HOMO and LUMO energies of the BOD-Pyr were calculated by DFT/B3LYP/6-311G(d,p) method using on Gaussian 09W. Au/BOD-Pyr/n-Si/In Schottky diode were fabricated using thermal evaporation and spin coating technique. The electronic and photovoltaic properties of Au/BOD-Pyr/n-Si/In photodiode have been investigated by current-voltage (I-V) measurements at dark and under various illumination intensities. The calculated ideality factor and barrier height of the diode in dark were found to be 2.84 and 0.75 eV, respectively. These parameters were also obtained under 100 mW/cm2 illumination level as 1.55 and 0.87 eV, respectively. The values of open-circuit voltage and short circuit current density were obtained as 0.26 V and 0.56 mA/cm2 under the illumination level of 100 mW/cm2. These all findings suggest that Au/BOD-Pyr/n-Si/In device can be used as photodiode in optoelectronic applications.

DEEP LEARNING BASED MASK DETECTION IN SMART HOME ENTRIES DURING THE EPIDEMIC PROCESS

In this study, "smart home" systems were designed against Covid-19 virus, which negatively affects life all over the world, and viruses that may become epidemics later. Our homes need to be more hygienic and safe than yesterday. One of these hygiene rules is the masks that cover our nose and mouth. It is very important to use a mask to prevent further spread of the virus. Whether or not the people in smart homes are wearing masks at home will be diagnosed with the deep learning method. Hosts will be warned if they do not have masks. Brightness level control card and illuminator have been added to smart home entrances to better identify people's faces. With PID, the illumination level is fixed at the desired value, and with IOT technology, people can follow the illumination level at the smart home entrance from the mobile application.