Electronic transport in a Cantor stub waveguide network

We investigate theoretically, the character of electronic eigenstates and transmission properties of a one dimensional array of stubs with Cantor geometry. Within the framework of real space re-normalization group (RSRG) and transfer matrix methods we analyze the resonant transmission and extended wave-functions in a Cantor array of stubs, which lack translational order. Apart from resonant states with high transmittance we unravel a whole family of wave-functions supported by such an array clamped between two-infinite ordered leads, which have an extended character in the RSRG scheme, but, for such states the transmission coefficient across the lead-sample-lead structure decays following a power-law as the system grows in size. This feature is explained from renormalization group ideas and may lead to the possibility of trapping of electronic, optical or acoustic waves in such hierarchical geometries

The effect of illumination compensation methods with histogram back projection for camshift application

This paper presents the results of a factorial experiment performed to determine the effect ofillumination compensation methods with histogram back projection to be used for objecttracking algorithm continuous adaptive mean-shift (Camshift). Since Camshift tracking can beused for distance approximation of an object, a precise tracker algorithm is required. Thisstudy compared two types of illumination compensation methods using Design of Experiment(DOE) in the presence of illumination inconsistency. Based on the results, it was found thatselecting two channels as reference in histogram back projection weakens the accuracy ofCamshift tracking whereas the combination of both methods produces results that are moredesirable.Keywords: object tracking; camshift; vision system; DOE

Narratives of War: How Somali Women Story Their Experiences of War

Background: The literature on refugee experiences of war is problem saturated, viewing these experiences as ‘traumatic’, leading to a range of “mental health problems” including post-traumatic stress disorder (PTSD), and those who experience them as ‘victims’. This is based on Western worldviews and ignores local and community constructions of experience. Resilience theorists provide a relative departure from problem-based constructions of refugee stories but rely heavily on the concept of trauma, privileging powerful medicalised Western worldviews legitimatised by “scientific claims”. Research specifically exploring the narratives of refugees’ firsthand experience of war is scarce. Methodology: This research used a narrative analytic methodology from a feminist social constructionist perspective to understand how four Somali women refugees who have not used services in the UK, recount their experiences of war. Findings: Participants’ personal injury did not mean as much to them as did their views about shattered Somali identity, loss of belonging, neighbours and community. They linked recovery to mended relationships with God and community and put emphasis on forgiveness and their roles as peace makers and witnesses to gross human rights violations. The conceptual and semantic challenges of these findings to Western culture, based on concepts of self and resilience, are discussed. The implications for psychology practice, research and policy are also explored

Perancangan Media Komunikasi Berbasis Web Untuk Pembelajaran

Pesatnya perkembangan ilmu pengetahuan dan teknologi telah membawa dampak kepada pendidikan, tidak terkecuali di Indonesia. Program pendidikan yang bersifat konvensional sukar dipertahankan seutuhnya, karena tersedianya media dan informasi baru yang semakin banyak dan bervariasi. Salah satu media yang perkembangannya semakin melesat adalah penggunaan komputer. Penggunaan komputer sebagai sarana pendidikan dimungkinkan karena banyak potensi yang dapat dimanfaatkan dari komputer tersebut. Penelitian ini mencoba melihat efektifitas dan efisiensi pembelajaran dengan merancang media komunikasi berbasis web. Situs pembelajaran Universitas telah diujicobakan terhadap tiga puluh mahasiswa. Sebanyak 96% menyatakan program ini sangat menarik dan sangat membantu dalam kegiatan pembelajaran. Selain itu 90% menyatakan program ini dapat mengatasi kebosanan terhadap perkuliahan di kelas dalam bentuk metode ceramah. The rapid development of science and technology has affected education, including in Indonesia. Conventional education programs are difficult to be maintained completely, because the availability of new information media is becoming increasingly numerous and varied. One more shot of media development is the use of computers. The use of computers as a means of education is possible because a lot of potential that can be used from that computer. This study tries to see the effectiveness and efficiency of learning by designing a web-based communications media. The e-learning site has been tested to thirty students. As many as 96% said the program is very interesting and very helpful in learning activities. In addition 90% stated that this program can overcome the boredom of lectures in the classroom in the form of the lecture method

Interaksi Dinamis Variabel Makroekonomi Terhadap Return Saham Di Bursa Efek Indonesia

: This study aims to analyze how the effect of macroeconomic variables on stock returns in Indonesia. Stock returns in this study using two approaches, JCI and LQ45. The selection of macroeconomic variables in this study is an adaptation of the research which using a variable index of industrial production, money supply (M2), SBI rate and the exchange rate against the dollarto determine the risk of the domestic macroeconomic and usingthe federal funds rate variable to determine the risk of macroeconomic abroad in the form of U.S. mone­tary policy shocks. Techniques of analysis in this study using time seriesVAR (Vector Auto­regresive). The data used in this study are monthly time series data. The results of this study indicate that monetary sector has a direct impact on stock price movements in Indonesia com­pared to the realactivity indicated by the absence ofa direct effect of changes in the indus­trial production index for the stock price index movement either JCI nor LQ45. This study also indicate the U.S. monetary policy shock directly affects stock returns in Indonesia Stock Exchange (IDX)

Efficient graphene-based photodetector with two cavities

We present an efficient graphene-based photodetector with two Fabri-P\'erot cavities. It is shown that the absorption can reach almost 100% around a given frequency, which is determined by the two-cavity lengths. It is also shown that hysteresis in the absorbance is possible, with the transmittance amplitude of the mirrors working as an external driving field. The role of non-linear contributions to the optical susceptibility of graphene is discussed.Comment: 10 pages, 8 figures. published version: minor revisio

The performance of modified jatropha-based nanofluid during turning process

The industry's extensive use of petroleum-based metalworking fluid (MWF) harms the environment and humans. The production of bio-based MWF, especially from crude jatropha oil (CJO), has therefore taken numerous initiatives. This aimed to formulate newly modified jatropha oil (MJO) with the addition of 0.05wt.% hBN and 0.05wt.% MoS2 as the nanofluid for MWF. The performance of the nanofluids was determined through the turning process in terms of cutting temperature, workpiece surface roughness, tool life and tool wear of the tool lubricated by the nanofluids. The performance of the nanofluid samples was compared with the synthetic ester (SE). From the results, after conducted 100mm axial cutting length MJO+hBN+MoS2 recorded the lowest in cutting temperature and surface roughness compared to all samples. The result shows that MJO+hBN+MoS2 has longer tool life (6500mm) compared to SE (6000mm). Abrasion and adhesion were observed as the dominant tool wear mechanism. In conclusion, MJO+hBN+MoS2 shows better machining performance and has the potential to be an environmentally friendly metalworking fluid

Factors Affecting Farmer Motivation in Requesting Duck Farm Credit: a Case Study in Cirebon, West Java, Indonesia

Objectives of study was to observe and to analyze the farmer motivation in requesting farmer credit(bank loan) for duck, based on farmer characteristics and communication behavior. Sample was chosenamong duck farmers in Kroya village, Cirebon. Characteristic factors were: age, part-timer farmer, farmsize, experience, education, and income. While the communication behavior factors werecommunicating with extension worker or credit officer, and participating in social problems. Farmermotivation to apply credit impacted by their characteristics, such as educational level, income and age.Communication behavior, such as participating in extension activities and social organization,were moreimpacted to apply credit, than farmer characteristics. Communication activities can be used to persuadefarmer to apply credit

IR optical fiber-based noncontact pyrometer for drop tube instrumentation

The design of a two color pyrometer with infrared optical fiber bundles for collection of the infrared radiation is described. The pyrometer design is engineered to facilitate its use for measurement of the temperature of small, falling samples in a microgravity materials processing experiment using a 100 meter long drop tube. Because the samples are small and move rapidly through the field of view of the pyrometer, the optical power budget of the detection system is severly limited. Strategies for overcoming this limitation are discussed

Detection of quantum light in the presence of noise

Detection of quantum light in the presence of dark counts and background radiation noise is considered. The corresponding positive operator-valued measure is obtained and photocounts statistics of quantum light in the presence of noise is studied.Comment: 4 pages, 1 figure; misprints correcte