Medan, Indonesia

University of North Sumatra
Medan, Indonesia

The Sumatera Utara University or is a public university located in the city of Medan in North Sumatera, Indonesia.It is situated in Padang Bulan, in the Medan Baru subdistrict of Medan, close to the City Centre, with a total area of 122 hectares. Due to an increase in student numbers, a new campus is being constructed in Kwala Bekala, 15 km distant, with a 300 hectare campus area.Its rectors serve eight-year renewable terms.USU was established as a Foundation Universitet North Sumatera on June 4, 1952. The first is the Faculty of Medicine Faculty which was established on August 20, 1952, now commemorated as the anniversary USU. President of Indonesia, Sukarno then USU inaugurated as the seventh state university in Indonesia on November 20, 1957. Wikipedia.

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Dalimunthe R.F.,University of North Sumatra | Heldy,University of North Sumatra
IOP Conference Series: Materials Science and Engineering | Year: 2017

This research is to gain an entrepreneurial mind-set and entrepreneurial interests among Posyandu cadres in Karang Berombak Sub-District of Medan Barat Medan in running entrepreneurship. The formulation of the problem is whether the entrepreneurship mind-set of cadres affects the interest in entrepreneurship or not. Methodology : This research is analytic with a questionnaire. There are 34 health cadres of total samples from 18 Posyandu (Maternal & Child Health Centre) which are situated in the Karang Berombak Village by taking sampling technique with purposive random sampling who selected from 18 Posyandu with the provisions've had entrepreneurial experience and has been already 3 years as cadres. Analytic form was used simple linear regression test to see the effects of the influence the mindset of the interest in entrepreneurship. Findings : The results showed that the entrepreneurial mindset affects the interest of entrepreneurship of Posyandu cadres in Karang Berombak village where entrepreneurial mindset consists of the desire to do business, understand finance and financial management, business ideas, a willingness to improve the business, willing to invest in training and to be able to see opportunities. That affects the interests of the entrepreneurial cadres is one of the potential entrepreneurs to boost the economy. Posyandu cadres are also expected to move in increasing family income and build a social entrepreneur from Posyandu. © Published under licence by IOP Publishing Ltd.

Hasibuan R.,University of North Sumatra | Zamzami M.A.,University of North Sumatra
IOP Conference Series: Materials Science and Engineering | Year: 2017

Ginger (Zingiber officinale Roscoe) is an agricultural product that can be used as beverages and snacks, and especially for traditional medicines. One of the important stages in the processing of ginger is drying. The drying process intended to reduce the water content of 85-90% to 8-10%, making it safe from the influence of fungi or insecticide. During the drying takes place, the main ingredient contained in ginger is homologous ketone phenolic known as gingerol are chemically unstable at high temperatures, for the drying technology is an important factor in maintaining the active ingredient (gingerol) which is in ginger. The combination of solar energy and molecular sieve dryer that are used in the research is capable of operating 24 hours. The purpose of this research is to study the effect of operating conditions (in this case the air velocity) toward the drying characteristics and the quality of dried ginger using the combination of solar energy and molecular sieve dryer. Drying system consist of three main parts which is: desiccator, solar collector, and the drying chamber. To record data changes in the mass of the sample, a load cell mounted in the drying chamber, and then connected to the automated data recording system using a USB data cable. All data of temperature and RH inside the dryer box and the change of samples mass recorded during the drying process takes place and the result is stored in the form of Microsoft Excel. The results obtained, shows that the air velocity is influencing the moisture content and ginger drying rate, where the moisture content equilibrium of ginger for the air velocity of 1.3 m/s was obtained on drying time of 360 minutes and moisture content of 2.8%, at 1.0 m/s was obtained on drying time of 300 minutes and moisture content of 1.4%, at 0, 8 m/s was obtained at 420 minutes drying time and the moisture content is 2.0%. The drying characteristics shows that there are two drying periods, which is: the increasing drying rate, and the falling drying rate, while the constant drying rate is not visible. The result of ginger quality shows that there are no significant changes in the organoleptic analysis, the ash content is about 7.52-7.94% and the oil content is 0.79-0.83%. © Published under licence by IOP Publishing Ltd.

Budiman M.A.,University of North Sumatra | Rachmawati D.,University of North Sumatra
IOP Conference Series: Materials Science and Engineering | Year: 2017

This research aims to study the efficiency of two variants of variable-length codes (i.e., Goldbach G0 codes and Even-Rodeh codes) in compressing texts. The parameters being examined are the ratio of compression, the space savings, and the bit rate. As a benchmark, all of the original (uncompressed) texts are assumed to be encoded in American Standard Codes for Information Interchange (ASCII). Several texts, including those derived from some corpora (the Artificial corpus, the Calgary corpus, the Canterbury corpus, the Large corpus, and the Miscellaneous corpus) are tested in the experiment. The overall result shows that the Even-Rodeh codes are consistently more efficient to compress texts than the unoptimzed Goldbach G0 codes. © Published under licence by IOP Publishing Ltd.

Teruna D.R.,University of North Sumatra
IOP Conference Series: Materials Science and Engineering | Year: 2017

Pushover analysis or also known as nonlinear static procedures (NSP) have been recognized in recent years for practical evaluation of seismic demands and for structural design by estimating a structural building capacities and deformation demands. By comparing these demands and capacities at the performance level interest, the seismic performance of a building can be evaluated. However, the accuracy of NSP for assessment irregular building is not yet a fully satisfactory solution, since irregularities of a building influence the dynamic responses of the building. The objective of the study presented herein is to understand the nonlinear behaviour of six story RC building with mass irregularities at different floors and stiffness irregularity at first story (soft story) using NSP. For the purpose of comparison on the performance level obtained with NSP, nonlinear time history analysis (THA) were also performed under ground motion excitation with compatible to response spectra design. Finally, formation plastic hinges and their progressive development from elastic level to collapse prevention are presented and discussed. © Published under licence by IOP Publishing Ltd.

Campbell-Smith G.,University of Kent | Simanjorang H.V.P.,University of North Sumatra | Leader-Williams N.,University of Kent | Linkie M.,University of Kent
American Journal of Primatology | Year: 2010

Human-wildlife conflicts, such as crop-raiding, increase as people expand their agricultural activities into wildlife habitats. Crop-raiding can reduce tolerance toward species that are already threatened, whereas potential dangers posed by conflicts with large-bodied species may also negatively influence local attitudes. Across Asia, wild pigs and primates, such as macaques, tend to be the most commonly reported crop raiders. To date, reports of crop-raiding incidents involving great apes have been less common, but incidents involving orangutans are increasingly emerging in Indonesia. To investigate the interplay of factors that might explain attitudes toward crop-raiding by orangutans (Pongo abelii), focal group discussions and semi-structured interviews were conducted among 822 farmers from 2 contrasting study areas in North Sumatra. The first study area of Batang Serangan is an agroforest system containing isolated orangutans that crop-raid. In contrast, the second area of Sidikalang comprises farmlands bordering extensive primary forest where orangutans are present but not reported to crop-raid. Farmers living in Batang Serangan thought that orangutans were dangerous, irrespective of earlier experience of crop-raiding. Farmers placed orangutans as the third most frequent and fourth most destructive crop pest, after Thomas' leaf monkey (Presbytis thomasi), wild boar (Sus scrofa), and long-tailed macaque (Macaca fascicularis). Although most (57%) farmers across both study areas were not scared of wildlife species, more than a quarter (28%) of the farmers' feared orangutans. Farmers in Batang Serangan were generally more tolerant toward crop-raiding orangutans, if they did not perceive them to present a physical threat. Most (67%) Batang Serangan farmers said that the local Forestry Department staff should handle crop-raiding orangutans, and most (81%) said that these officials did not care about such problems. Our results suggest that efforts to mitigate human-orangutan conflict may not, per se, change negative perceptions of those who live with the species, because these perceptions are often driven by fear. © 2010 Wiley-Liss, Inc.

Nurwahyuni I.,University of North Sumatra | Sinaga R.,University of North Sumatra
International Journal of Pharma and Bio Sciences | Year: 2014

In vitro propagation for bioconservation of threatened Brastagi citrus, local citrus in North Sumatra Indonesia is explained. The aims of bioconservation is to protect Brastagi citrus from diminish in the ecosystem due to the eruption of Mount Sinabung. The studies were conducted through cuting bud propagation to prepare explant sources followed by in vitro propagation to obtain plant seedling. The propagation was carried out by cutting the bud from branch of survive Brastagi citrus and stick onto the bark of sour citrus (Citrus aurantium) root stock. In vitro propagation was conducted experimentally with treatment combinations to obtain seedling of Brastagi citrus for bioconservation. The results showed that cutting bud propagation has successfully conducted to rescue three varieties of Brastagi citrus and to provide explant material for in vitro propagation. The callus were grown in all explants for all treatments. Two types of callus were observed, one in brown color, watery and non embryogenic, and the other was embryogenic callus with green color. The embryogenic callus is nodular that was develops and directly regenerate to plantlet. Growth stimulator in medium culture was significantly influenced callus induction, the growth of somatic embryo, plantlets, leaves, and roots.

Wahab I.,University of North Sumatra
International Journal on Advanced Science, Engineering and Information Technology | Year: 2016

Development's Millennium Development Goal (MDG) on reducing infectious diseases including HIV / AIDS. The program still faces many obstacles, because the problem of HIV / AIDS isrelated to lack of knowledge and understanding of the community. The resistance of the socio-cultural aspects in counselling is happening, especially in Aceh province as religion-based province. In connection with the program to improve public knowledge in the prevention of HIV / AIDS, communication concept developed should always pay attention to the closeness between the aspects of culture, psychological, and social. This study aims to determine the appropriate method of communication in the prevention of HIV / AIDS in North Aceh District by religious leaders (religious teacher) and health counselors. This study is a quasi-experimental (quasi-experimental study pre-test and post-tests design). This study was conducted in North Aceh District covers three districts and each sub-district consists of two villages namely Lhoksukon Subdistrict (Desa Ara Abe and Village Nga), Dewantara subdistrict (Desa Paloh Lada and Village Bangka Jaya), Seunuddon districts (Village Ulee Rubeek West and the village of Ulee Rubeek Timu). This research has been conducted in April-May 2015. Thepopulations were used as much as 14.020 couples of reproductive age and the samples were obtained using a sample size of at least 132, according Lemeshow in every village so that the entire sample of 492 couples of childbearing age. Data were analysed using a pre-test and posttest gain index, while hip dissertation test using Mann-Whitney U. Based on the results showed that the empirically proven that the model of health education approach method with religious leaders (religious teacher) proved more effective than the model of health education undertaken by health counsellors. There are differences in the level of knowledge about the prevention of HIV / AIDS significantly in women of reproductive after the health education provided by religious teacher and health counsellors, (p = 0.001 <0.05). Increased knowledge score Aged Women of Reproductive about the prevention of HIV / AIDS are taught by religious teacher was significantly higher than the score of knowledge of women of reproductive who receive counselling by health counsellors women of reproductive are more enthusiastic to follow counselling that delivered by religious teachercompare to the counselling which delivered by health counsellors. Proximity psychological, emotional, social and culture among women of reproductive age with religious teacher. This is because the religious teacher can customize the material submitted by the communicant sociopsychologic. During this time the role of religious teacher is more on improving the quality of faith and morality, while the implementation in the prevention of various diseases that can be affected the public. It is suggested that the religious teacher should be empowered to educate the public about health through religious approach by using effective communication methods to improve public knowledge.

Nasution H.,University of North Sumatra
Green Building, Materials and Civil Engineering - Proceedings of the 4th International Conference on GreenBuilding, Materials and Civil Engineering, GBMCE 2014 | Year: 2015

The effects of Maleic Anhydrate (MAPP) as compatibilizer on tensile properties and water absorption of Recycle Polypropylene (rPP)/Oil Palm Empty Bunch Fruit (OPEFB) composites were investigated. Several contents of MAPP viz. 2, 4, 6, 8 wt.% were prepared. Corresponding rPP/ OPEFB composite without MAPP addition was also made for comparison. The OPEFB composition was fixed at 30 wt.%, while rPP was 70 wt.% and reduced correspondingly on the addition of MAPP. Composites were prepared in extruder with temperatur of 190 °C. Results indicated an improvement in tensile strength and elongation at break were obtained on the addition of MAPP up to 6 wt.%. It was also revealed that the water absorption was significantly decreased as the MAPP was increased up to 6%. However, the addition of 8 wt.% MAPP was found to reduce these properties. Scanning electron microscopy (SEM) images from the tensile fracture surface supported that the improvement on interface region between matrix and filler have occurred. © 2015 Taylor & Francis Group, London.

Nasution S.Z.,University of North Sumatra
International Journal on Advanced Science, Engineering and Information Technology | Year: 2015

In Indonesia, the Central Bureau of Statistics of North Sumatra Province (2011), estimates that in 2010 the infant mortality rate of 24.5 per 1,000 live births. This figure decreased when compared to the previous year at 26.90 per 1,000 live births. There are several factors influencing the reduction in infant mortality, among others, the availability of various facilities or accessibility factors and health services from skilled medical personnel and the willingness of people to change the traditional life to the norm of modern life in the field of health. this study aims to explore how families with Mandailing culture care for pregnant mother in in term of nutritional support. Informants in this study are Mandailing Natal community. This study found that If there are health workers or health care in they place, pregnant mother will come to check their condition and their nutritional status at health workers during childbirth although later they are more happy assisted by traditional birth attendants or village shaman, it can reduce the complications or problems that the pregnant women who will ultimately reduce maternal mortality and infant mortality rate. Mandailing Natal society is a society that is not closed to new information, the community here is relatively easy in receiving information or a new thing, it's just that sometimes less precise methods of delivery that makes people not obey the things delivered. To improve community health status Mandailing Natal especially pregnant mother and childbirth it is advisable: That the government is aggressively disseminating health programs so that the public is more familiar with the health programs in a way reproduce health workers, especially midwives who will assist communities in improving the health of pregnant mothers especially in term of their nutrition and health services in Mandailing Natal to be more proactive in providing community especially related information to the health of pregnant mothers.

to investigate the safety and effectiveness of dose TU+DMPA hormones in developing potential male contraceptives. suppression of rat sperm concentration through increased apoptotic germ cells by in vivo administration of a long-acting androgen composed of a combination of testosterone undecanoate (TU) and depot medroxyprogesterone acetate (DMPA) was performed. Adult Sprague-Dawley rats received 2.5 mg TU every 6 week and 1.25 mg DMPA every 12 week for 60 week, a regimen known to rapidly reduce testosterone production by the testes and produce azoospermia within 12 week. Sperm concentration data were log transformed before analysis. Results are expressed as the mean±SEM. ANOVA, followed by post hoc test was used to determine differences across time and phase. T test was employed to determine differences between two groups. apoptosis revealed significant increase in apoptotic germ cells (80% when rats were administered with TU+DMPA. Apoptotic germ cells can be found in several spermatogonia (20%), spermatocytes (30%), and spermatids (50%). dose TU+DMPA hormones may be a safe and effective way to develop potential male contraceptives.

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