LCD Computer Research Articles

Teachers’ Strategies in Teaching English Vocabulary by Using the EWA Application

This study investigates teachers' strategies for applying the EWA application in the classroom. Using qualitative methods, data were collected from teachers through observation, interviews, and documentation. The documentation consisted of materials from teachers who used the EWA application, while structured interviews provided detailed insights into their experiences teaching English vocabulary with the app. The results highlight two main strategies: Cooperative Learning and the Clustering Method. In Cooperative Learning, students share and exchange vocabulary, promoting peer-to-peer learning. The Clustering Method involves using pictures to prompt students to identify related vocabulary, enhancing visual learning. Both strategies actively engage students and make learning enjoyable due to the EWA app's interactive and visually appealing features. However, internet connectivity issues pose challenges. Teachers utilize LCD projectors and computer labs to overcome these, ensuring that lessons proceed smoothly. This study concludes that using Cooperative Learning and the Clustering Method with the EWA application can significantly enhance student participation and enjoyment in learning English vocabulary.

Technological innovation based on biomass waste with controlled features for cassava drying agrotechnology

Indonesia is the largest cassava producer in the world. In 2020, cassava production will be 18.3 million tons. The aim of this research is to find an innovation in the field of cassava processing using environmentally friendly biomass energy. The method used is to design an innovative biomass energy-based cassava drying technology tool using a controlled system. The tool is tested in the laboratory using experimental methods to produce a prototype. tools that can be directly applied in the field. The results of the research showed that the time used during the drying process with variations in the coconut shell mass of 400 grams for 136 minutes, then continued with a mass of 600 grams for 109 minutes had succeeded in obtaining dry cassava products, with an average temperature during drying. room 40 to 60 °C with minimum humidity ranging from 24 to 49 percent. All observation data can be displayed on an LCD screen or computer with controlled features. Conclusion: In the end, this research has applications in the cassava processing industry in every region, both in Indonesia and in any region, offering an innovative approach to biomass energy-based cassava processing technology with controlled features.

Utilization of Electrical Energy in Lecture Building at Universitas Bangka Belitung

Electrical energy has become necessary in supporting human life activities, one of which is in higher education institutions. Universitas Bangka Belitung, as one of the public universities in the Province of Bangka Belitung Islands, currently has 12 lecture buildings to provide the best academic services in the 20 available undergraduate programs. Through measurements carried out during lecture activity hours in a few weeks at the main panel in 12 lecture buildings, also obtained the average current, average voltage, and average real power in the R phase, S phase, and T phase. lecture building with sampling data every 15 minutes. Based on measurements, the entire lecture building’s electrical energy consumption is in the range 2-5 kWh with electronic equipment used, including air conditioning, LCD computer projectors, and room lighting

A PVC Geodesic Dome Planetarium

A planetarium is an invaluable tool for teaching introductory astronomy, but one that few astronomy educators have ready access to. Here we describe a do-it-yourself planetarium that can be built with modest funding. There have been other planetarium construction projects described in the literature and online, most of which use cardboard to make multiple faces, which are then fastened together to form a dome that serves as the planetarium projection surface. Our design uses a skeletal dome that supports a hemispherical cloth projection screen. A computer LCD projector, reflecting off a diverging half-dome security mirror on the interior edge of the dome base, serves as the starfield projector. The open-source sky simulation software Stellarium has the necessary features to pre-distort the sky image appropriately so that, after reflection from the diverging mirror, the dome is properly filled.

Optical air-gap exfiltration attack via invisible images

In this paper, we evaluate an optical covert channel in which sensitive information (textual or binary) is exfiltrated from air-gapped computers through the LCD screen. Our experiments show that low contrast and fast blinking images which are invisible to human subjects, can be recovered from photos taken by a local camera. Consequentially, we show that malware on a compromised computer can obtain sensitive data (e.g., files, images, encryption keys, passwords), and project it onto a computer LCD screen, invisible and unbeknownst to users. An attacker can reconstruct the hidden data using a photo taken by a local camera. In order to demonstrate the feasibility of this type of attack and evaluate the channel's stealth, we conducted a battery of tests with 40 users. We also examined the channel’s boundaries under various parameters, with different types of encoded objects, at several distances, and using several kinds of cameras.

Restoration of high-sensitivity and adapting vision with a cone opsin

Inherited and age-related retinal degenerative diseases cause progressive loss of rod and cone photoreceptors, leading to blindness, but spare downstream retinal neurons, which can be targeted for optogenetic therapy. However, optogenetic approaches have been limited by either low light sensitivity or slow kinetics, and lack adaptation to changes in ambient light, and not been shown to restore object vision. We find that the vertebrate medium wavelength cone opsin (MW-opsin) overcomes these limitations and supports vision in dim light. MW-opsin enables an otherwise blind retinitis pigmenotosa mouse to discriminate temporal and spatial light patterns displayed on a standard LCD computer tablet, displays adaption to changes in ambient light, and restores open-field novel object exploration under incidental room light. By contrast, rhodopsin, which is similar in sensitivity but slower in light response and has greater rundown, fails these tests. Thus, MW-opsin provides the speed, sensitivity and adaptation needed to restore patterned vision.

AMALAN PENGGUNAAN BAHAN BANTU MENGAJAR (BBM) MENERUSI PENGINTEGRASIAN KEMAHIRAN BERFIKIR ARAS TINGGI (KBAT) DALAM KALANGAN GURU PENDIDIKAN ISLAM SEKOLAH RENDAH NEGERI PERAK THE PRACTICES OF USING TEACHING AIDS (BBM) THROUGH AN INTEGRATION OF HIGHER ORDER THINKING SKILLS (KBAT) AMONG ISLAMIC EDUCATION TEACHERS IN PRIMARY SCHOOLS IN PERAK

This study aims to identify the practices of using teaching aids (BBM) among Islamic Education teachers in the teaching and learning process (PdP) based on Higher Order Thinking Skills (KBAT). This study was conducted in eight primary schools in Perak involving interviews with teachers of Islamic Education (GPI), headmasters, assistant headmasters and students. Components of teaching aids (BBM) are viewed through three main components which are Pattern Routine, Pattern Ancillary and Non-Pattern through the integration of teaching and learning which involves KBAT based on the elements of application, analysis, evaluation and invention. The results of the interview are governed by N'vivo Version 7 software to produce a matrix table theme and related practices of BBM among GPI of primary schools in Perak based on KBAT. The results show that there are 12 types of BBM used in the GPI's PdP with different pattern used. Much emphasis is given to the Pattern Routine while Pattern Ancillary and Non-Pattern just become the support material in the KBAT-based of PdP. The Pattern Routine consists of textbook, LCD computer, whiteboard and A4 paper while the Ancillary consists of handout (manila cards), mahjong paper, reference books and scan card. The Non-Pattern consists of newspapers, charts, films and radio cassette.

Penggunaan Media Pembelajaran Mahasiswa Jurusan Teknik Sipil Selama Program Pengalaman Lapangan (PPL)

This study aims to determine the use of learning media by civil engineering students during field experience program. This research was conducted at the Department of Civil Engineering, State University of Jakarta. The time period of research is January-June 2011. The research population is Civil EngineeringStudents UNJ Even Semester, 2010/2011 Academic Year. The sample used are 20 PPL students from 35 Department of Civil Engineering PPL students who did field experience program and 60 vocational school students. This research used survey method with descriptive approach. Questionnaire instruments are used in collecting the data. The instruments were tested first before used in research. Test results showed that 21 questions are valid and reliable (rtabel = 0.532). The analysis of data is using qualitative descriptive techniques with percentage.The results showed that PPL students using instructional media in accordance with the learning purposes that are analyzing the concepts and relationships,memorizing, requires higher-level thinking, and implementing physical procedures. In addition, PPL students have usedall learning media such asprinting media, programs (power point), boards, real thing, video with media devices LCD projector and computer / laptop. In this case the largest percentage is to use the board media and the smallest percentage isto use video media.The conclusion of this study is that all PPL students of Civil Engineering were usinglearning media appropriate to the learning objectives

A novel technique of using computer imaging for efficient detection of M. tuberculosis in acid-fasta stain procedure

Tuberculosis is an emerging infectious disease in Taiwan which nearly 15,000 newly diagnosed cases are reported each year. The most economical method for laboratory diagnosis of pulmonary tuberculosis is based on the bacteriological examination of sputum smears stained by the Acid- Fast stain method for acid fast bacilli (AFB). Thus, microscopic examination of specimens for AFB plays a key role in the initial diagnosis, monitoring of treatment, and eligibility for release from isolation. However, laboratory technicians often time are overwhelmed with large quantity of smears and under pressure of limited time allowed to issue the results. In this study, we propose a novel technique to transfer microscopic image of AFB from the eyepiece to a large size computer LCD screen via a digital camera embedded on the microscope.

Reading in 2110 – reading behavior and reading devices:a case study

PurposeThe purpose of these experiments is to find out whether and how reading behavior might be influenced by reading devices.Design/methodology/approachIn total, three experiments, the first one more independent from the second and third, investigate how European Library and Information Science students react to electronic reading devices, unfamiliar as they are with them. The second and third experiments explore implications such as reading rate, concentration and symptoms of fatigue in conjunction with electronic reading devices. Test objects were the Sony eBook Reader, the IREX iLiad, LCD computer screens, Laptops and the Smart Phone HTC Touch HD in comparison with printed documents and books.FindingsContrary to common opinion, the results indicate a trend that concentration and/or reading rates do not suffer from reading on electronic reading devices. Further, it was found that influences on reading rate and concentration are posed rather by the individual reading behavior of a person, as well as by the nature of a text (scholarly or novelistic), than by the reading devices used.Research limitations/implicationsProblems included the limited means to acquire technical support. The first experiment, in particular, suffered from inadequate equipment such as audio recordings that were too quiet. The value of the statistics is limited by the small number of test subjects and test runs. Additionally, the test persons had differing experience in reading with an electronic device. Two had used an electronic reading device before, whilst the others never had.Originality/valueBased on the findings in recent literature, experiments such as this have rarely been conducted. Research in this particular field, i.e. print vs screen reading performance in adults, is sparse in recent history and more often done through examining personal preferences. To the knowledge of the authors, the research has never been done from the perspective of Library and Information Science (LIS). The preliminary results question common assumptions and theses.

Automated alternation flicker for the detection of optic disc haemorrhages

Optic disc haemorrhages are associated with active glaucomatous neurodegeneration and ongoing visual field loss. We sought to determine whether automated alternation flicker enhances the detection of disc haemorrhages in serial images from patients with glaucoma when compared to side-by-side photographic evaluation and single-image display. Serial sets of optic nerve photographs of 394 eyes from 234 patients followed for glaucoma at the authors' institutions were included in this study. Eyes with disc haemorrhages were graded for difficulty level and randomized along with nondisc haemorrhage control images into one of three presentation groups (automated alternation flicker, side-by-side or single image). Seven graders viewed all images and assessed for the presence or absence of disc haemorrhages. The sensitivity of automated alternation flicker for disc haemorrhage detection (0.878) was higher than side-by-side (0.705; p = 0.002) and single photographs (0.757; p = 0.01). There was no specificity difference between pairs of presentation groups (all p ≥ 0.7). Automated alternation flicker was a more sensitive method for disc haemorrhage detection than the current clinical standards and may have an important role in the management of glaucoma.

The take-anywhere, do-anything display

The paper presents a commercial LCD computer display (3Qi) produced by the Pixel Qi company that offers e-paper's power savings and readability in sunlight. Pixel Qi's first production display is a 10-inch screen with 1024 by 600 pixels in the full-color mode. It's the first LCD screen that's optimized for mobile computing, in which the most common activity is the reading of text-in e-mail, code, or on a Web site. In adequate light, you can easily read and write without wasting any battery power on the backlight.

Photometric stereo using LCD displays

This paper considers the problem of shape-from-shading using nearby extended light sources. The paper reviews a number of methods that employ nearby illuminants, and describes a new technique that assumes a rectangular planar nearby distributed uniform isotropic illuminant. It is shown that such a light source illuminating a small Lambertian surface patch is equivalent to a single isotropic point light source at infinity, in the absence of shadowing. A closed-form solution is given for the equivalent point light source direction in terms of the illuminant corner locations. Equivalent point light sources can be obtained for distinct illuminant patterns allowing standard photometric stereo algorithms to be used. An extension is given to the case of a rectangular planar illuminant with arbitrary radiance distribution. Experimental results are shown demonstrating the application of the theory to photometric stereo using illumination from a LCD computer monitor. Details on the photometric calibration of the illumination source and image acquisition device are provided.

Detection of Artificial Occlusal Caries in a Phosphor Imaging Plate System with Two Types of LCD Monitors Versus Three Different Films

The aim of this study was to determine diagnostic performance of a storage phosphor plate system Digora Optime (Soredex, Helsinki, Finland) with two types of LCD monitor in the detection of artificial caries when compared to Ultraspeed (D), Ektaspeed Plus (E), and Insight (F) radiographic films. Seventy extracted human molars-with artificial caries-were radiographed under identical standardized conditions using (1) a storage phosphor plate system Digora (Soredex, Helsinki, Finland), (2) Insight, (3) Ektaspeed Plus, and (4) Ultraspeed (Carestream Health Inc, Rochester, NY). All digital images and radiographs were examined by three observers for the presence or absence of artificial caries using a five-point confidence scale. Digital images were evaluated both on a LCD computer monitor (Philips 170S, Holland) and medical monitor-3 megapixel monochrome display (Me355i2, Totoku, Tokyo)-with brightness and contrast enhancement. Observer responses were evaluated using ROC analysis and other measurements for diagnostic accuracy. Storage phosphor images with medical monitor demonstrated higher mean A (z) values (0.70 +/- 0.08) than digital images with computer monitor and conventional films. Storage phosphor images with medical monitor presented the highest score, 0.97, 0.90, 0.94, for each observer, respectively. Also, true positive observations (0.82) and positive likelihood ratios (2.71) were higher in enhanced storage phosphor images with medical monitor. Caries detection of mechanically created lesions by experienced radiologists is roughly comparable when examining D-speed film images and Digora images on both the computer and medical LCD monitors, and appears to be poorer on E- and F-speed film images.

Focus on nanoscience and nanotechnology

Focus on nanoscience and nanotechnology

Characteristics of a 12-Domain MVA-LCD

A multi-domain (12-domain) vertical alignment liquid crystal display (MVA-LCD) device is proposed and its electro-optic characteristics evaluated through a 3-D simulator. The MVA-LCD exhibits advantages in wide viewing angle, high transmittance, fast response time, and small color shift when a pair of wide view crossed circular polarizers is employed. Potential applications of this MVA-LCD for high quality LCD TVs and computer monitors are emphasized.

Bending Angle Effects on the Multi-Domain in-Plane-Switching Liquid Crystal Displays

The electro-optic properties of a multi-domain in-plane switching liquid crystal display (IPS LCD) are investigated through a three-dimensional (3-D) simulator, which combines the finite element and finite difference methods for fast solutions. The bending angle between the chevron-shaped electrodes makes an important contribution to the operating voltage and response time, and suppresses the color shift. Using optimized uniaxial compensation films, the viewing cone of the multi-domain IPS LCD is widened to /spl plusmn/80/spl deg/ at 100:1 contrast ratio. These properties are especially desirable for LCD TV and computer monitor applications.

The Symmetry Property of a 90° Twisted Nematic Liquid Crystal Cell

Abstract A set of symmetry properties of a 90° twisted nematic (TN) cell under rotation of polarizers has been observed both cxpcrimentally and theoretically for the first time. These symmetry properties can he explained by an argument based on rotation and time reversal transformations. The use of these symmetry properties allows one to answer the long time puzzle as to whether the e-mode TN cell, in which the transmission axis of the entrance polarizer is parallel to the entrance rubbing direction, is superior to the o-mode TN cell, in which the transmission axis of the entrance polarizer is perpendicular to the entrance rubbing direction, for both normally white and normally black cases. In addition, these symmetry propertics provide us with a useful test for any existing TN LCD computer simulation program.