A flexible micro-thermoelectric device from carbon nanotube-epitaxially grown (Bi,Sb)2Te3 nanocrystal

Flexible thermoelectric (TE) materials have attracted increasing interest due to their potential applications in energy harvesting and high-spatial-resolution thermal management. However, a high-performance flexible micro-TE device (TED) compatible with the modern electronics fabrication process has not yet been developed. Here we report a general van der Waals epitaxial growth approach to fabricating a freestanding and flexible hybrid comprised of single-wall carbon nanotubes and highly ordered (Bi,Sb)2Te3 nanocrystals. High power factors ranging from ~1,680 to ~1,020 µW m−1 K−2 in the temperature range of 300-480 K, combined with a strongly depressed thermal conductivity yield an average figure of merit of ~0.81. A prototype flexible micro-TED module consisting of two p-n hybrids was then fabricated, which demonstrated an unprecedented open circuit voltage of ~22.7 mV and a power density of ~0.36 W cm−2 under a ~30 K temperature difference, and a net cooling temperature of ~22.4 K and a heat absorption density of ~92.5 W cm−2.

Problems of adaptation of imported specialized breeds of cattle

The experience of importing Simmental breed from Austria of beef cattle Hereford breed from Novosibirsk region, red steppe breed from the Altay Territory to the Republic of Sakha (Yakutia) is analyzed. Acclimatization of imported livestock to the conditions of the Far North is hard. Of 471 heads of cattle of Austrian Simmental breed imported in 2007, 171 are currently left. The average milk production of cows per head is 2485 litres, the average figure for the Republic is 2364 litres. Of 200 heads of Herefords brought in 20112012, only 32 have remained. A brief description of the milk productivity of the red steppe breed in Yakutia is presented. Milk yield per cow amounted to 2630 litres in six lactations, which is 166 litres higher than the national average. Due to non-compliance with the requirements of the technology of keeping and feeding imported animals, 116 out of 200 imported cows have remained. The hematological parameters of cattle reflecting the state of the body's immune system during acclimatization are given. Adaptation of red steppe cows was difficult, but the hematological parameters corresponded to the physiological norm. Possible ways of developing livestock breeding programme in Yakutia to create a simmentalized Yakut zonal type of cattle, which is distinguished by exceptional adaptive abilities for keeping and feeding conditions, are proposed. Thanks to crossbreeding with Yakut cattle, the acclimatization and further breeding of imported specialized breeds and their crosses is successful. The ways of improving the technology of keeping and feeding cattle on the farms of the Republic are shown.

Development of Projo Bale Model Based on Android Application in History and Local Wisdom Studies of Malang

Lack of research development on history and local wisdom studies of Malang and its integration in learning acitivities is the background of the development of Projo Bale model. Local history is full of relevant local wisdom values to be implanted in learners. The history department as the institution that produce history teachers should teach students with knowledge about local history at least the area of Malang. This Model was compiled in response to the problem. The collaboration between Outdoor Learning and Project Based Learning models with Android app based is a creative effort to leverage technology in historical learning innovations. The stages in this development include 5 phases ranging from analysis, development, design, implementation and evaluation. In the final stage of the evaluation of the model post implementation reached an average figure of 82.75% indicating this model is viable and effective as an innovative model in the study of history.

Simultaneous improvement of power factor and thermal conductivity via Ag doping in p-type Mg3Sb2 thermoelectric materials

Ag doping in Mg3Sb2 leads to an enhanced average figure-of-merit (zT) by simultaneously improving the power factor and thermal conductivity.

Screening Pediculosis dan Oxyuriasis pada Anak-anak TK/KB Al-Kautsar di Kelurahan Mojosongo Kecamatan Jebres Kota Surakarta

Pediculosis is an infection caused Pediculus humanus capitis, Oxyuriasis or enterobiasis or kreminan is an infection caused by pinworms. In 2010 research was conducted by the Department of Parasitology, Faculty of Medicine, University of Indonesia in Jakarta SD Paseban found 19 positive child worms. Study in a boarding school in Tangerang early 2011, 300 students were examined only 9 positive worms. Head of the Center for Environmental Health Engineering & PPM Ministry of Health dr. Hartati Samsudin, MQIH said that based on the survey results, the current Indonesian children suffer from intestinal worms average figure is around 30%. The purpose of this devotion Creating a harmonious relationship between the Community Higher education in an effort to improve the welfare of people in the health field, improving the ability to implement disease control pediculosis. The results of the examination pediculosis done after counseling, so that the students already understand it and understand what is pediculosis, of the 92 students that there were 86 students who signed us check her hair and then we comb using serit if nothing positive was found Pediculus humanus capitis we take and put in pot samples. The test results showed as many as 10 students Pediculus humanus capitis positive.

Comparative case study on website traffic generated by search engine optimisation and a pay-per-click campaign, versus marketing expenditure

Background: No empirical work was found on how marketing expenses compare when used solely for either the one or the other of the two main types of search engine marketing. Objectives: This research set out to determine how the results of the implementation of a pay-per-click campaign compared to those of a search engine optimisation campaign, given the same website and environment. At the same time, the expenses incurred on both these marketing methods were recorded and compared. Method: The active website of an existing, successful e-commerce concern was used as platform. The company had been using pay-per-click only for a period, whilst traffic was monitored. This system was decommissioned on a particular date and time, and an alternative search engine optimisation system was started at the same time. Again, both traffic and expenses were monitored.Results: The results indicate that the pay-per-click system did produce favourable results, but on the condition that a monthly fee has to be set aside to guarantee consistent traffic. The implementation of search engine optimisation required a relatively large investment at the outset, but it was once-off. After a drop in traffic owing to crawler visitation delays, the website traffic bypassed the average figure achieved during the pay-per-click period after a little over three months, whilst the expenditure crossed over after just six months. Conclusion: Whilst considering the specific parameters of this study, an investment in search engine optimisation rather than a pay-per-click campaign appears to produce better results at a lower cost, after a given period of time.[PDF to follow]

The tropospheric scintillation prediction of earth-to-satellite link for Bangladeshi climatic condition

The performance of earth-to-satellite link largely depends on various environmental factors like rain, fog, cloud, and atmospheric effects like ionospheric and tropospheric scintillation. In this paper, the tropospheric scintillation of Bangladesh, a subtropical country, is predicted based on measured climatic parameters, like relative humidity, temperature. In this prediction, ITU scintillation model are used. Four major cities, named Dhaka, Chittagong, Rajshahi and Sylhet, of Bangladesh are selected for prediction of scintillation. From the simulation result, Rajshahi is found to be the most badly affected region by the scintillation fade depth (SFD), which is followed by Chittagong and the SFD is minimum in Dhaka and Sylhet. The difference in SFDs among the considered cities does not vary heavily. It is also found that the SFD varies from 3 dB to 13 dB depending on the frequency in used. Moreover, higher scintillation is found in rainy season of Bangladesh. During this period, the scintillation becomes double of the average figure.

Vocabulary size revisited: the link between vocabulary size and academic achievement

Many researchers have tried to assess the number of words adults know. A general conclusion which emerges from such studies is that vocabularies of English monolingual adults are very large with considerable variation. This variation is important given that the vocabulary size of schoolchildren in the early years of school is thought to materially affect subsequent educational attainment. The data is difficult to interpret, however, because of the different methodologies which researchers use. The study in this paper uses the frequency-based vocabulary size test from Goulden et al (1990) and investigates the vocabulary knowledge of undergraduates in three British universities. The results suggest that monolingual speaker vocabulary sizes may be much smaller than is generally thought with far less variation than is usually reported. An average figure of about 10,000 English word families emerges for entrants to university. This figure suggests that many students must struggle with the comprehension of university level texts.