Medan, Indonesia

University of North Sumatra

www.usu.ac.id
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.


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.


Buchari,University of North Sumatra | Matondang N.,University of North Sumatra
AIP Conference Proceedings | Year: 2017

This study was conducted to determine the level and impact of noise on pupils' learning performance that was observed through a survey at State Elementary School (SDN 060882), which is located on the corner of Abdullah Lubis Street and Pattimura Medan Street. The study was done by measuring the noise level using the Threshold Limit Value (TLV) by taking 24 locations as the measurement points. The results indicated that the noise levels exceeded the standard TLV >55 dBA as regulated in the Decree of the Minister of Environment No. KEP/48/MENLH/11/1996. According to the data processing, the noise level at school was 70.79 dBA. The classrooms were classified into noisy zones based on the Noise Mapping. Those in Red Zone which noise level were in the range of (69-75 dBA) were Class IIIa, Class IVb, and Class VI. In addition, those in Yellow Zone which were in the range of (65-69 dBA) were Class II, Class IIIa, Class IVa and Class V. The noise brought the physiological impact in the forms of dizziness that had the highest percentage of 22% and emotional and uncomfortable feeling of 21%; the communication impact of teacher's explanation disturbance of 22%; and Pupils' learning performance was evidenced to decline of 22%. Some improvements are suggested to reduce the noise such as the reposition of windows, acoustic material to cover the classrooms' wall, and bamboo trees or grasses as the barried around the school area. © 2017 Author(s).


Nasution A.,University of North Sumatra | Khairunnisa,University of North Sumatra | Tanjung H.R.,University of North Sumatra
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2015

Objective: To analyze the impacts of pharmacist counseling on adherence to medications and reduction in systolic and diastolic blood pressures (SBP/DBP) of hypertensive outpatients. Methods: A retro-prospective cohort study was undertaken to evaluate the impacts of two-month period counseling on medication adherence and SBP/DBP of hypertensive patients (n=47) insured by Social Security Organizing Body in primary health centers (Medan Deli, Helvetia, Darussalam, and Teladan) in Medan. Inclusion criteria were patients diagnosed with hypertension, age ≥ 18 years, and under treatment of antihypertensive drugs. A questionnaire was used to assess characteristics of the patients, antihypertensive drugs provided, and BP. The eight-item Morisky Medication Adherence Scale (MMAS-8) of each patient was assessed. Characteristics of the patients and antihypertensive drugs provided were descriptively analyzed. Impacts of counseling on medication adherence and SBP/DBP of the patients were analyzed using Wilcoxon test. All analyses were performed using Statistical Package for the Social Sciences (SPSS, version 19, Chicago, IL, USA) (p value <0.05 was considered significant). Results: Characteristics of the patients: male, 23.4%, female, 76.6%, mean age, 61.22 ± 9.90 (years). MMAS-8 score improved significantly from 4.58 before counseling to 6.28 after counseling, p = 0.000. There was a reduction in SBP from 160.49±23.15 mmHg before counseling to 149.04 ± 21.02 mmHg after counseling, p = 0.001. DBP also reduced from 91.23 ± 12.82 mmHg before counseling to 87.14 ± 9.94 mmHg after counseling, p = 0.014. Conclusion: Counseling improves adherence to prescribed medications and BP in hypertensive patients. © 2015, IJPPS. All rights reserved.


Lubis I.,University of North Sumatra | Nasution Mahyuddin K.M.,University of North Sumatra
Journal of Physics: Conference Series | Year: 2017

Transport equipment has the potential to contribute to environmental pollution. The pollution impact on the welfare of the environment. Thus, the potential of the environment needs to be raised to block the pollution. A design based on probability models of the determining factors in the environment should be a concern. This paper aims to reveal the scenarios as the beginning to express the clues, and based on surveys have been had the ability to choose a design. © Published under licence by IOP Publishing Ltd.


Nasution M.K.M.,University of North Sumatra
Journal of Physics: Conference Series | Year: 2017

The best tool currently used to access information is a search engine. Meanwhile, the information space has its own behaviour. Systematically, an information space needs to be familiarized with mathematics so easily we identify the characteristics associated with it. This paper reveal some characteristics of search engine based on a model of document collection, which are then estimated the impact on the feasibility of information. We reveal some of characteristics of search engine on the lemma and theorem about singleton and doubleton, then computes statistically characteristic as simulating the possibility of using search engine. In this case, Google and Yahoo. There are differences in the behaviour of both search engines, although in theory based on the concept of documents collection. © Published under licence by IOP Publishing Ltd.


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.


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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