Peningkatan Hasil Belajar Dengan Media Kartu Kwartet Dalam Keterampilan Menyusun Portofolio

Abstract: Impovement of Learning Result with Quartet Cards Media in Portofolio Skilling Skills. Purpose for this study to know: (1) improvement of reading interest; (2) improvement of learning result; and (3)improvement of portofolio skilling skills. Data are collected through questionnaires, interviews, documents, and observations on instructional (PBM) so that it is included in classroom action research. The result of research are: (1) data of reading interest of social studies subject (IPS) student through learning using quartet card; (2) list of student learning result obtained after learning using quartet card on social studies subject; and (3) student portfolio result after using quartet card.Abstrak: Peningkatan Hasil Belajar dengan Media Kartu Kwartet dalam Ketrampilan Menyusun Portofolio. Tujuan penelitian ini untuk mengetahui: (1) peningkatan minat baca; (2) peningkatan hasil belajar; dan (3) peningkatan keterampilan menyusun portofolio. Data dikumpulkan melalui angket, wawancara, dokumen, dan pengamatan pada PBM sehingga termasuk dalam penelitian tindakan kelas. Hasil penelitian adalah: (1) data peningkatan minat baca IPS siswa melalui pembelajaran menggunakan kartu kwartet; (2) daftar nilai hasil belajar siswa yang diperoleh setelah pembelajaran menggunakan kartu kwartet pada mata pelajaran IPS; dan (3) hasil portofolio siswa setelah menggunakan kartu kwartet

Multiple nonlinear regression model for predicting the optical performances of dielectric crossed compound parabolic concentrator (dCCPC)

As a typical type of three-dimensional compound parabolic concentrator (CPC), dielectric crossed compound parabolic concentrator (dCCPC) has drawn a significant research attention in these years to explore its angular characteristics in solar collection for concentrating photovoltaics and daylighting control in buildings. Optical efficiency and transmittance are the main performance indicators to evaluate a dCCPC which may be base-coated as a receiver or non-coated for daylighting. The most common way to accurately determine the performance of a dCCPC is through ray-tracing simulation which requires advanced optical analysis software and lots of time. To facilitate the annual performance evaluation of dCCPC, this study puts forward several mathematical models for multiple nonlinear regression based on a mass of simulation results. The models can predict the transmittance of non-coated dCCPC and the both of transmittance and optical efficiency of base-coated dCCPC from several sky parameters, respectively. The agreement between predicted and simulated values is generally satisfactory. The coefficient of determination (R2) for each model is higher than 0.94 and the mean square error (MSE) is less than 0.002. Six specific time among the whole year are selected to verify the reliability of the prediction models in practice. The limitation and significance of these models are discussed as well. The regression models provide a convenient and accurate approach to predict the optical performance of dCCPC

An experimental study on the effect of visual tasks on discomfort due to peripheral glare

This article concerns discomfort due to sources of glare in the peripheral visual field. A visual task is needed to maintain foveal fixation at a known location and in past studies the tasks have ranged from a simple fixation mark to a task requiring greater cognitive attention such as reading. It was hypothesized that these different approaches to control visual attention would influence the evaluation of discomfort. This article reports an experiment which compared evaluations of discomfort when using the two visual tasks, a simple circle and a pseudo-text reading task, and two procedures, category rating and luminance adjustment. The results from both procedures confirmed the hypothesis: a lower degree of discomfort was expressed in the pseudo-text trials than in trials with the circular fixation mark

The effect of ambient light condition on road traffic collisions involving pedestrians on pedestrian crossings

Previous research suggests darkness increases the risk of a collision involving a pedestrian and the severity of any injury suffered. Pedestrian crossings are intended to make it safer to cross the road, but it is not clear whether they are effective at doing this after-dark, compared with during daylight. Biannual clock changes resulting from transitions to and from daylight saving time were used to compare RTCs in the UK during daylight and darkness but at the same time of day, thus controlling for potential influences on RTC numbers not related to the ambient light condition. Odds ratios and regression discontinuity analysis suggested there was a significantly greater risk of a pedestrian RTC at a crossing after-dark than during daylight. Results also suggested the risk of an RTC after-dark was greater at a pedestrian crossing than at a location at least 50 m away from a crossing. Whilst these results show the increased danger to pedestrians using a designated crossing after-dark, this increased risk is not due to a lack of lighting at these locations as 98% of RTCs at pedestrian crossings after-dark were lit by road lighting. This raises questions about the adequacy and effectiveness of the lighting used at pedestrian crossings