bluuebunny/crossref_metadata_2025 huggingface dataset:
Cytotoxic activity and apoptosis induction of avocado Persea americana Mill. seed extract on MCF-7 cancer cell line
Authors: Widiyastuti Yuli , Pratiwi Rarastoeti , Riyanto Sugeng , Wahyuono Subagus
Published: February 2019

Avocado Persea Americana Mill. is a commercially important crop and studies have shown that the pulp may have benefits to cardiovascular health, dermatological health and possibly anti-cancer activity. Avocado seeds have several medicinal properties such as anti-hyperglycemic, antimicrobial, antioxidant and anti-inflammation. This study aim to evaluate the effect of avocado seed extract on viability and apoptosis of breast cancer cell line MCF-7. The anticancer effect was evaluated by cytotoxic test using MTT assay and the effect on apoptosis and cell cycle was examined by flow cytometry method. The cytotoxic test showed that chloroform extract had strong cytotoxic activity against MCF-7 cell lines with IC50 value of 94.87 µg/mL. Furthermore, the chloroform extract was partitioned with methanol and yield of soluble methanol fraction (FLM) and non soluble methanol fraction (FTLM). The cytotoxic activity of the methanol soluble fraction (FLM) and non soluble methanol fraction (FTLM) against MCF-7 cell lines was increased with IC50 of 34.52 and 66.03 µg/mL, respectively. Flow cytometry analysis using annexin-V and propidium iodide staining revealed that methanol soluble fraction could induce apoptosis and modulating the cell cycle arrest in MCF-7 cell. This research indicated that avocado seed has a potency to induce apoptosis and as anti-proliferative to MCF-7 cells lines.
In vitro anticancer activity of N-benzyl 1,10-phenanthroline derivatives on human cancer cell lines and their selectivity
Authors: Sholikhah Eti Nurwening , Jumina Jumina , Widyarini Sitarina , Hadanu Ruslin , Mustofa Mustofa
Published: February 2019

This research was conducted to evaluate the anticancer activity of new compounds of benzyl-1,10- phenanthroline derivatives and their selectivity. In vitro anticancer activity of 11 benzyl-1,10-phenanthroline derivatives were conducted on three human cancer cell lines, cervical cancer (HeLa), myeloma (NS-1), and breast cancer (MCF-7) using MTT-based cytotoxicity assay. The cytotoxicity of each compound was assessed to normal Vero cell line by the same method. The in vitro anticancer activity and cytotoxicity was expressed by the concentration inhibiting 50% of the cell growth (IC50), and the selectivity index (SI) was determined by calculating ratio of the IC50 on Vero cell line and the human cancer cell lines. The results showed that among the 11 compounds tested, the (1)-N-(4-butoxybenzyl)-1,10-phenanthrolinium bromide exhibited the best in vitro anticancer activity with an IC50 27.60 ± 2.76 µM on HeLa, 6.42 ± 5.53 µM on NS-1 and 9.44 ± 2.17 µM on MCF-7 cell lines. Its SI were 377.65 ± 39.97 on HeLa, 6158.72 ± 5306.34 on NS-1 and 1140.11 ± 261.85 on MCF-7 cell lines. This study demonstrated that (1)-N-(4-butoxybenzyl)-1,10-phenanthrolinium bromide possessed a potential in vitro anticancer activity on cancer cell lines with high selectivity
Anti-metastatic effect of curcumin analog pentagamaboronon-0-fructose (PGB-0-F) against 4T1 breast cancer cells
Authors: Ertanto Yogi , Utomo Rohmad Yudi , Jenie Riris Istighfari , Susidarti Ratna Asmah , Meiyanto Edy
Published: February 2019

Development of a chemotherapeutic agent and boron carrying pharmaceutical based on triple-negative breast cancer is important due to its metastatic progression. Metastases are often more dangerous than the primary tumor and they are responsible for 90% of all cancer deaths. The purpose of this study was to explore the anti-metastatic activities of the PGB-0 complex with fructose (PGB-0-F) against 4T1 breast cancer cells. A scratch wound healing assay was carried out to determine the migration inhibition ability of PGB-0-F, while MMP-9 expression was analysed using gelatin zymography. The testing of anti-migration activity showed that PGB-0-F inhibited in 4T1 cells, whereas the gelatin zymography assay revealed a suppression of MMP-9 expression. PGB-0-F inhibited closure on 4T1 metastatic breast cancer cells line compared with the control. PGB-0-F decreased the MMP-9 expression level compared with the control. Based on these results, PGB-0-F has the potential to be developed as a chemotherapeutic agent, and especially as an anti-metastatic agent.
Evaluation of potential gene expression as early markers of insulin resistance and non-alcoholic fatty liver disease in the Indonesian population
Authors: Limantara Eunice , Kartawidjajaputra Felicia , Suwanto Antonius
Published: February 2019

Early detection of insulin resistance (IR) or non-alcoholic fatty liver disease (NAFLD) is crucial to preventing future risks of developing chronic diseases. The Homeostatic Model Assessment of Insulin Resistance (HOMA-IR), Liver Fat Score (LFS), and Fatty Liver Index (FLI) are generally employed to measure severity stages of IR and NAFLD. The study of gene expressions could explain the molecular mechanisms that occur early on in IR and NAFLD; thus providing potential early markers for both diseases. This study was conducted to evaluate the gene expressions that could potentially be early markers of IR and NAFLD. All participants (n = 21) had normal blood glucose and were categorized as without hepatosteatosis (n = 10), at higher risk of hepatosteatosis (n = 6), and hepatosteatosis (n = 5). Gene expression analysis was performed using the 2-∆∆CT relative quantification method. There were significant differences in galnt2 (p < 0.002) and sirt1 (p < 0.010) expression between the first and the third tertiles of HOMA-IR; and in ptpn1 (p < 0.012) expression between the first and the second tertiles of LFS. In conclusion, the expressions of galnt2 and sirt1 could be used as early markers of IR, while the expression of ptpn1 could be employed as an early marker of NAFLD.
NMR metabolomics revealed metabolites and bioactivity variation in Torbangun leaves Plectranthus amboinicus L. with different origins
Authors: Yuliana Nancy Dewi , Sugiharto Muhammad Anwari , Lioe Hanifah Nuryani , Goto Masao , Ishikawa Yuko Takano
Published: February 2019

Plectranthus amboinicus has been reported to have antidiabetic and antioxidant activities. Environmental factors might influence the plant’s secondary metabolite profile and its beneficial properties. NMR-based metabolomics was used to show phytochemical variations between specimens of P. amboinicus grown in Japan and Indonesia. The results showed that flavonoids and triterpenes were among the discriminating factors of the variation between the two groups. Targeted comparative analysis of the concentration of the specific flavonoids of the plants using a validated HPLC-MWD method showed that the Japanese samples contained a higher concentration of total flavonoids compared with the Indonesian samples. The Japanese and Indonesian samples contained 1100.6 ± 5.1 and 532.4 ± 1.8 µg/g luteolin, and 584.5 ± 7.4 and 571.7 ± 11.6 µg/g apigenin, respectively. Eriodyctiol was detected only in the Indonesian samples. Contrarily, more intensive DPPH reduction and α-glucosidase inhibition activities were found in the Indonesian samples (IC50 14.4 ± 1.2 and 24.0 ± 0.3 µg/mL for the DPPH assay, 1181.9 ± 113.5 and 4451.4 ± 290.0 µg/mL for α-glucosidase inhibition, respectively). Thus, flavonoids might not be the only group of compounds related to the aforementioned bioactivities. This should be confirmed by further research targeting other groups of compounds, such as triterpenes.
Secretory expression of human insulin precursor in Pichia pastoris employing truncated α-factor leader sequence and a short C-peptide
Authors: Nurdiani Dini , Hariyatun Hariyatun , Kusharyoto Wien
Published: February 2019

In the past ten years, diabetes prevalence has increased rapidly in low- and middle-income countries due to lifestyle changes. This increased number of diabetic patients leads to the escalation of recombinant insulin demand, which is creating a large global insulin market. Pichia pastoris has appeared as an alternative host to produce recombinant proteins. It has excellent qualifications as an expression host for large-scale production of recombinant proteins for therapeutic use. In this study, we attempted to express the insulin precursor (IP) in P. pastoris. We used a synthetic IP-encoding gene constructed in frame with the truncated α-factor secretory signal and a short C-peptide (DGK) linked A- and B-chain of human insulin in a pD902 expression vector. Several zeocin resistant clones were successfully obtained and verified with PCR using AOX1 specific primers for the integration of the expression cassette into the P. pastoris genome and for the identification of Mut phenotypes. The secretion of IP by the Pichia pastoris clone in the culture supernatant was confirmed using SDS-PAGE, where a single band of the secreted IP with a molecular mass above 6.5 kDa was found.
The Struggle is Real: Advocacy, Activism, and Agency in Young Adult Protagonists with Autism
Authors: Matsumoto Vail , Black Rhonda S.
Published: February 2019

While there is much research behind adolescent protagonists developing advocacy, activism, and agency in young adult literature in order to change the trajectory of their lives, fewer studies have examined adolescent protagonists with autism under similar circumstances. The image of the semi-comic, socially tragic autistic teenager is portrayed in the media more often than one who advocates for himself, takes action to be independent, and develops as an agent of change. This paper examines six award-winning young adult novels whose protagonists emerge as young people developing independence despite dealing with the challenges living with autism brings. How they exert this autonomy helps illustrate the multitude of ways in which teens handle frustration, challenges, and helplessness while managing a disability. Readers not only engage with teenagers facing obstacles, but also have the opportunity to develop a better understanding of their peers, a deeper sense of empathy, and empowerment to make changes in their own lives.
An Invisible Reality of Truckers in Bengal—A Field Based Study Report
Authors: Ghosh Niladri Sekhar
Published: February 2019

The industry of roadway is renowned as a strong pillar in the world of transportation. Lots of studies are already done regarding the roadway transport and it related population in various aspects. However, nothing any specific study has been done to reflect the state of the truckers related to long distance driving in West Bengal. This study has bounded in the logistic hub namely region of Calcutta-Mumbi Tuck Terminal Ltd. (In a side of NH-6), West Bengal, India and its surrounding area. During this study it’s observed that most of the truckers are “Upper primary to Secondary (Class-V to Class-X)” qualified and “29 to 39” years aged people. It’s also noticed that they are here in this profession from “6 to 10” years. The statistical databases also indicating that highest percentage of truckers are able to drive “7 to 12” hours in a day (at a time) and mostly of the truckers do it “30 days to 90 days” in a year. However, it is also observed that with the respect of capacity of driving “Year of experience” and “Capacity of driving” both issues are related but not inter-depending.
Creative Economic Development of Pesantren
Authors: Bawono Anton
Published: February 2019

This article mostly focuses on the values performed by pesantren (Islamic boarding school) in taking influence of creative economics within the community. Three factors observed in this paper mainly but may relate to other variables are embedded traditional values, technological resources and the role of ustadz and kyai engaged in the creative economic process. Taking several pesantren in Java and Yogyakarta as research sites, while conducting multiple regression as technique of analysis, this research shows that aforementioned variables have a positive and significant influence on developing creative economic of pesantren. Creative economic of pesantren largely invites more elaborative research, while this research can be a preliminary contribution to the field of new economic challenges within Islamic society.Keywords: pesantren, creative economics, kyai, ustadz
Conventional Home Loan and Islamic Home Financing in Comparative Perspective
Authors: Umardani Dwi
Published: February 2019

This article aims to comparatively discuss conventional home loan (Kredit Perumahan Rakyat/KPR) and Islamic home financing (Pembiayaan Pemilikan Rumah Syariat/PPRS), locating in Bank Central Asia (BCA) and Bank Syariah Mandiri (BSM). Qualitative narrative of formal procedural system of owning home of the mortgages critically analyzed aiming to get clear-cut the differences both loans. This paper confirms that BCA uses the interest system in providing mortgage (KPR) and does not concern on the use of the funds. BSM generally has implemented murabaha scheme (deferred payment sale). For the late paying installments, both banks have applied quite different procedure systems.Keywords: mortgages, home loan, KPR, PPRS
Business Development Strategy Model of SMEs Through SWOT and EFE-IFE Analysis
Authors: Hatta Iha Haryani , Riskarini Dian , Ichwani Tia
Published: February 2019

Considering that the SME entrepreneurs of Gresik Regency are mostly young, educated and experienced, however their businesses are not yet in legal entities. This research situates the SME business development strategy model through SWOT and EFE-EFI analysis, aiming to identify the conditions and models of SME business development strategies to improve their performances. This research has interviewed 40 respondents who were selected in multi stage, and analyzed through SWOT and EFE-IFE analysis. The result of this research explains that the ability of SME entrepreneurs in managing business and the achievement level of marketing performance is good, except the ability to manage finances. In addition, external conditions support these SMEs. Keywords: SWOT, EFE-IFE, business development strategy, SMEs
Halal Emotional Attachment on Repurchase Intention
Authors: Yoga Ika
Published: February 2019

This research examines the position of emotional attachment as a mediation of the influence between halal awareness, halal logos and food ingredients composition on repurchase intention of buying halal products. This research brings sample of those who have consumed or have purchased halal products. Due to the population is unknown, by using the Lameshow formula, a total of 384 respondents were obtained. Halal emotional attachment, as this research shows, is able to play a salient role as a mediator of the influence among three aforementioned variables on repurchase intention.  This research would have been an effort to contribute marketing halal products as a new concept of the emotional attachment. Keywords: halal, Lameshow, marketing halal, repurchase intention
Macro Economic Challenges and Third Party Funds of Islamic Commercial Banks in Indonesia
Authors: Anik Anik , Prastiwi Iin Emy
Published: February 2019

This article aims to determine the effect of inflation, the BI Rate, the exchange rate of the rupiah to the US dollar, and the amount of money supply for Third Party Funds (TPF) in Indonesians’ Islamic Banks during 2013-2016. This research method uses multiple regression analysis with time series data; gathering data from 48 samples of which are monthly data on the variables.  The result of this research find that the inflation and exchange rate variables have no significant effect on TPF, while the BI Rate variable and the money supply have a significant effect on TPF. In doing so, Islamic banking can pay serious attention to the BI rate and the money supply and in this study the BI rate on the direction of TPF. Keywords: inflation, BI rate, exchange rate, Third Party Funds
Seeing A Buddhist Doing Business: An Interview with Sudhamek AWS
Authors: Yulianti Yulianti
Published: February 2019

This paper discusses an interview with Sudhamek AWS, a well-known Buddhist businessman in Indonesia. Through this interview, the author of this article confidently examines how Sudhamek negotiated the practices of Buddhism and business. The author has conducted a structured interview with Sudhamek directly. Having conducting an interview, the author argues that as a businessman, Sudhamek is not just a businessperson but he is a Buddhist who tries to put his understanding of religion into practice especially related to his way of life. This interview has a salient contribution for opening portray of business values in Indonesian businessman world today. Keywords: business, spiritual economics, Buddhism ethics
Macroeconomic Variables on Indonesian Sharia Capital Market
Authors: Nugroho Taufik , Rusydiana Aam S.
Published: February 2019

This article emphasizes to analyze the effect of macroeconomic variables on sharia capital market in Indonesia by using Vector Error Correlation Model (VECM) approach method. The variables used are world oil price, Industry Production Index (IPI) Currency Exchange Rate to Dollar and Consumer Price Index (CPI) in Indonesia. The research show that in the Indonesian Stock Sharia Index (ISSI) model, the VECM in the ISSI model can explain in the short term the IPI variable, world oil price, rupiah to dollar, DJIA and CPI does not affect to ISSI variable. While in the long term, world oil prices are positive climate and Dow Jones Industrial Average (DJIA) variables negatively affect ISSI. In addition, FEVD test the world oil price has more dominant contribution than other variable 6.02%. Keywords: sharia capital market, macroeconomics, VECM, ISSI
Hurdle Rate and Adverse Selection on Escalation of Commitment
Authors: Ridha M. Arsyadi
Published: February 2019

This article tests the effect of hurdle rates and adverse selection on escalation of commitment. Participants consist of 135 junior managers who had passed two course of management. The result indicates that the managers with adverse selection conditions will tend not to continue unfavorable projects. This research also affirms that the managers with adverse selection conditions will be more likely not to continue projects that are not favorable under the conditions of self-set hurdle rates compared to the conditions of organization-set hurdle rates. This article may contribute to empirical evidence of a decline in comprehensive escalation of commitments. Keywords: adverse selection, self-set hurdle rates, organization-set hurdle rates, escalation  of commitment
Fintech Achieving Sustainable Development: The Side Perspective of Crowdfunding Platform
Authors: Piliyanti Indah
Published: February 2019

Crowdfunding has gradually been an emerging financing model of raising small amounts of money from a large number of people, mostly by means of optimizing certain website. The article proposes to explore the development of crowdfunding platform and the prospective of Islamic crowdfunding as the financial solution. The data has been gathered from certain website, under five standards: social network, event, user motivation, incentive versioning, and critical mass. The article reveals that along with other types of crowdfunding platforms, Islamic crowdfunding have disrupted sharia financing in Indonesia, yet the relate rule of financing have not accommodated this great development. Keywords: crowdfunding, Islamic crowdfunding, micro financing
Generation XYZ’s Perception on Zakat Mal and Tax: The Planned Behavior Perspective
Authors: Saragih Arfah Habib
Published: February 2019

The research aims to apply the theory of planned behavior to predict respondents’ intention of offering zakat mal (wealth) and tax payment. The research brings questionnaires, aiming to generate a descriptive research. Technique of analysis being applied is the Partial Least Square (PLS) with SmartPLS software. The descriptive statistics shows that respondents have deep understanding between zakat mal and tax. In addition, the analysis using PLS reveals that attitude, subjective norm, and behavioral control influence one’s intention to pay zakat mal and tax, while behavioral intention affects actual behavior in paying the two. Keywords: zakat mal, tax, planned behavior
Pasar Resisting Mall: a Cross-Cultural Ethnographic of Economic Traditional Market
Authors: Hasanah Noviy
Published: February 2019

Yogyakarta since the late ten years has shifted an economic direction taking impacts on such economic sectors as that of pasar (Javanese traditional market). Pasar, as a daily space for economic interaction of the society to be threatened by the increasingly numbers of malls. This article critically tells the story of Gowok small trader resistance to the existence of a nearby mall. Doing ethnography for several months and in-depth interviews with some small traders, the author who comes from non-Javanese native have reflectively analyzed the cultural economy of the Javanese people. This article argues that market traders of pasar Gowok has transformed the pattern of buying and selling behavior and increased the variety of merchandise. Keywords: mall, Yogyakarta, pasar, traditional market, Javanese
Implanting Religious Practices: Economic Behavior of Kemloko Tobacco Farmers
Authors: Muslich Muslich
Published: February 2019

Tobacco from Kemloko Village has expressively attracted the attention of large companies such as Gudang Garam, Djarum, Sukun, Djambu Bol, Noroyono, and Bentoel. The Kemloko Village Community mostly works as a tobacco farmer, which is as many as 64.8% of total residents. In addition to these economic activities, the people of Kemloko Village are also active in carrying out traditional religious rituals (congregational prayers, tahlil dhikr and grave pilgrimage, ritual recitation, and slametan) led by village kyai. The kyai concurrently plays a role as important figures in the community, where the santri and society learn to adapt the outside realities, including the economic sphere. This article discusses the complex relationship of tobacco economic activity and the religious practices of the Kemloko Village community, arguing that the two factors makes traders (baskets and bosses) take advantage of the religious behavior of the elder kyai (as a source of authority) while the farmers get more profits. Keywords: tobacco farmers, religious practice, kyai, cultural brokerage
Integrated Marketing and Customers’ Decision Saving Funds in Islamic Banks
Authors: Christiyanto Wenda Wahyu , Astutik Mardi
Published: February 2019

Indonesia has a good market potential for Islamic banking business development. However, the market share of Islamic banks is still far behind the conventional ones. Over 5 years, Islamic marketing mix has been integrated with the contemporary marketing mix. This article prudently examines the decision of society to invest their funds in Islamic banks dealing with the integrated marketing mix. Questionnaires had been distributed to 150 respondents of Islamic banks customers. Using analysis of Structural Equation Modeling based on variance (SEM-PLS), this article shows that the integrated marketing mix has taken an influence on customer purchasing decisions, consisting of pragmatism and product, pertinence and promotion, persistence and process. Keywords: SEM-PLS, Islamic banking, integrated marketing
Perceptions and Prevalence of Alcohol and Cigarette Use Among American Indian Adults With Type 2 Diabetes
Authors: Walls Melissa L. , Hautala Dane , Gonzalez Miigis , Greenfield Brenna , Aronson Benjamin D. , Onello Emily
Published: February 2019

IN BRIEF This study examined community perceptions and prevalence of alcohol use and cigarette smoking among American Indian adults with type 2 diabetes. Results revealed normative rates and perceptions of smoking and negative views and low rates of alcohol use. Participants reported high levels of household indoor smoking and comorbid high-risk drinking and smoking. The high smoking rate among the adult American Indians in this study is especially problematic given the increased risk of cardiovascular problems related to both smoking and type 2 diabetes. The results underscore the importance of considering substance use behaviors and beliefs as a component of overall health and well-being for people with diabetes.
Seeing Clearly: Effects of Initiatives to Improve Diabetic Retinopathy Screening at a Pediatric Center
Authors: Lam Carol K.L. , Zborovski Stephen , Palmert Mark R. , Harrington Jennifer
Published: February 2019

IN BRIEF “Quality Improvement Success Stories” are published by the American Diabetes Association in collaboration with the American College of Physicians, Inc. (ACP), and the National Diabetes Education Program. This series is intended to highlight best practices and strategies from programs and clinics that have successfully improved the quality of care for people with diabetes or related conditions. Each article in the series is reviewed and follows a standard format developed by the editors of Clinical Diabetes. The following article describes an initiative to improve retinopathy screening rates at the pediatric diabetes clinic of a large academic teaching hospital in Canada.
Empleo de historietas para reforzar el aprendizaje del nivel superior en UPIBI - IPN / Employment of comic strips as Reinforcement Learning of Higher Education in UPIBI-IPN
Authors: Linares González Engelbert Eduardo , García Monroy Ana Isabel , Martínez Allende Lucero
Published: February 2019

Las estrategias de enseñanza-aprendizaje son instrumentos en los que se apoya el docente para mejorar el aprendizaje de los estudiantes. Las historietas pueden ser una herramienta pedagógica que favorezca el aprendizaje, ya que se basan en la narración de una historia a través de una sucesión de ilustraciones que se complementan con un texto. El objetivo de la historieta en el nivel superior es contextualizar el tema que se está estudiando en clase.En el presente trabajo se observó a 30 alumnos del área de ingeniería mientras elaboraban una historieta. Durante el proceso manifestaron habilidades gráficas y de redacción enfocadas en facilitar el aprendizaje, poniendo en práctica su capacidad analítica y creativa, así como su comunicación oral y escrita.
MANAGING HUMAN RESOURCE THROUGH GREEN POLICY: WAYS OUT AND ITS IMPLICATION
Authors: Hossen Md. Miraj , Begum Mareum , Sultana Fatema
Published: February 2019

This paper attempts to highlight the green policy and its practices for managing the human resource in the organizations and also seeks to ways out some techniques to make green HR policy useful for the organizational practices. In this study, the authors used secondary data through an extensive literature survey form different sources. The significant findings are that all over the world, organizations are trying to practice green management or implementation of green policy for their daily activities as well as to ensure the health and well-being of their human resources. Though the green system is beneficial for both the organizations as well as employees but it costs a lot in the initial stage to meet up the preliminary fixed costs, train the people and to make people ready to work as per green policies. Gathering experiences from different research in advanced countries the authors try to conclude the study by mentioning some ways- how to manage HR through green policy or green human resource management (HRM) techniques.
ISLAMIC MONETARY POLICY AND ITS IMPACT ON REAL SECTOR
Authors: Octaviani Isnaeni , Al Arif Mohammad Nur Rianto
Published: February 2019

The essence of the Islamic economic system is strengthening the real sector. This research aims to analyze the effect of Islamic monetary instrument (such as SBIS, PUAS and Islamic bank financing in the real sector. This research uses the Vector Error Correction Model (VECM) as a method of analysis. The finding revealed that based on the VECM estimation test, in the long term SBIS and Islamic bank financing has a positive effect on the Industrial Production Index (IPI). Meanwhile, PUAS has an adverse effect toward Industrial Production Index (IPI). Besides, based on impulse response function (IRF) test, the shock of SBIS and PUAS responded positively by Industrial Production Index (IPI). Then based on the result of FEVD test, the variable of PUAS in the model of this research has the most significant contribution toward Industrial Production Index (IPI).
INDUSTRIAL DIVERSIFICATION AND FIRM PERFORMANCE OF MANUFACTURING: DOES EFFICIENCY MATTER?
Authors: Setiawan Rahmat , Agustin Riska
Published: February 2019

Industrial diversification is one of the important strategies in developing the firm’s market share which is expected to improve firm’s performance. When a firm wants to diversify the industry, it requires knowledge and efficiency of managers in managing the strategy so that it can increase the benefits of the existence of industrial diversification relationship with firm’s performance. This study aims to examine the effect of efficiency on the relationship between industrial diversification and firm’s performance in manufacturing companies in Indonesia. By using the purposive sampling method and the 2012-2016 study periods, we obtained data from 70 manufacturing companies with a total of 253 observations. We found that industrial diversification had a significant positive effect on firm’s performance. Efficiency as a moderating variable shows that efficiency strengthens the positive relationship of industrial diversification on firm performance.
THE IMPLEMENTATION OF DRINKING WATER SUPPLY SYSTEM IN DECENTRALIZATION ERA
Authors: Hanim Wasifah
Published: February 2019

This study aims to analyze the system of drinking water management in the decentralization era and to to analyze of the difference of community accessibility to drinking water between before and after the era of decentralization. The analytical method used is descriptive method, which is analyzing the implementation of drinking water supply systems (DWSS) in the decentralization era and average difference test to determine the development of community accessibility to drinking water before and after decentralization era. The result shows that decentralization provides a positive development towards the implementation of the drinking water supply system, namely by increasing the number of districts/cities that have DWSS planning documents but statistically the decentralization era did not increase the growth of drinking water coverage.
LEADERSHIP ON EMPLOYEES’ PERFORMANCE TERANG UTAMA ABADI LTD. THROUGH SENSE OF ACHIEVEMENT
Authors: Christian Davy , Melinda Tina
Published: February 2019

Achievement earned by the company is inseparable from the employees’ performance. There are several factors affecting their performance. Two of them are leadership and motivation. The study aims to examine the influence of leadership on the sense of the achievement of the employees of Terang Utama Abadi (TUA) Ltd., the influence of leadership on the performance of the employees at TUA Ltd., the influence of the sense of achievement on the performance of employees at TUA Ltd., and the sense of achievement as an intervening variable on employee at TUA Ltd.. The respondents of this study were fifty-eight employees at TUA Ltd. This study was a quantitative research with structural equation modelling partial least square method. Questionnaires were used to collect the primary data. This study found that leadership and sense of achievement has positive influence on the employees’ performance. Meanwhile, the sense of achievement served as an intervening variable.
SINTESIS DAN KAKTERISASI ATKKS/KOMPON KARET/POLIPROPILENA SEBAGAI BAHAN TERMOPLASTIK ELASTOMER
Authors: Sinaga Angelina Hasian , Ginting Eva Marlina
Published: February 2019

Sintesis dan karakterisasi Abu Tandan Kosong Kelapa Sawit (ATKKS) bertujuan untuk mengetahui sifat mekanik campuran ATKKS/kompon karet/Polipropilena dengan variasi komposisi ATKKS (0,2,4,6,8) phr. Menggunakan alat internal mixer laboplastomil model 30 R150 dengan kecepatan putaran 60 rpm selama 12 menit pada suhu 180oC. Kemudian dilakukan cetak tekan panas dan tekan dingin menggunakan hot press dan cold press lalu dipotong dengan standar JIS K 6781 dan dilakukan uji mekanik menggunakan alat Universal Testing Machine (UTM). Berdasarkan analisa dari hasil pengujian sifat mekanik diperoleh sifat mekanik pada modulus elastisitas mengalami penurunan dengan bertambahnya jumlah komposisi ATKKS, begitu juga dengan kekuatan tarik. Dan mengalami peningkatan perpanjangan putus hingga pada komposisi ATKKS 6 phr.Kata Kunci : ATKKS, Kompon karet, Sifat Mekanik, Polipropilena
ANALISIS SIFAT MEKANIK KOMPON KARET DENGAN BAHAN PENGISI ABU TANDAN KOSONG KELAPA SAWIT
Authors: Saragih M T , Ginting Eva Marlina
Published: February 2019

Penelitian ini bertujuan untuk mengetahui sifat mekanik kompon dengan bahan pengisi Abu Tandan Kosong Kelapa Sawit (ATKKS) yang meliputi kekuatan tarik, perpanjangan putus dan kekerasan. Metode yang dilakukan adalah dengan cara mencampur dan menggiling nanopartikel ATKKS dengan karet SIR 20 hingga homogen dengan menggunakan open mill.Variasi komposisi bahan pengisi ATKKS yaitu 0, 2, 4, 6, dan 8 phr (part per hundred rubber). Analisis kekuatan tarik dan perpanjangan putus pada kompon diuji dengan menggunakan alat uji tarik Tensiometer, sedangkan kekerasan menggunakan Durometer.  Komposisi kompon terbaik terdapat pada sampel dengan bahan pengisi ATKKS 8 phr  dengan nilai kekuatan tarik sebesar 1,2 MPa, nilai perpanjangan putus sebesar 120 % dan nilai kekerasan sebesar 55 Shore A.Kata Kunci : Kompon Karet, Abu Tandan Kosong Kelapa Sawit (ATKKS), Karet Alam
MENENTUKAN POSISI IKAN DAN KEDALAMAN DANAU TOBA DIDAERAH PARAPATKECAMATAN GIRSANG SIPANGAN BOLON KABUPATEN SIMALUNGUNPROVINSI SUMATERA UTARA DENGAN METODE SONAR
Authors: Sitepu Debora Yunika , Hutahean Juniar
Published: February 2019

Penelitian ini bertujuan untuk mengidentifikasi posisi ikan di daerah Danau Toba kedalaman berapa ikan ditemukan menggunakan Garmin Aquamap 80xs, untuk mengetahui kedalaman agar dapat membuat tanda wilayah wisata bagi para perenang guna keselamatan pariwisatawan. Berdasarkan analisis nilai pemetaan penelitian ini menggunakan Metode peneliti menetukan lokasi penelitian, peneliti mempersiapkan alat yang digunakan terlebih dahulu menghubungkan alat-alat yang diperlukan, teknik pengambilan data peneliti menggunakan sensor dengan sonar tersebut diletakkan di samping kapal sehingga terkena air dan menentukan lintasan , analisis data dan interprestasi data peneliti melakukan dari hasil lapangan tiap titik lintasan maka peneliti terlebih dahulu mentransfer data dari Gps ke labtop dengan menggunakan BaseCame Map. Hasil penelitian menunjukkan bahwa daerah pantai bebas Danau Toba terdapat populasi ikan yang paling banyak pada posisi E98 56.105’ N2 40.069’ dari kedalaman 221.9m terdapat posisi ikan dalam kedalaman 100m  pada suhu 26,4  , pada titik ke-7,  dan zona aman renang bagi para wisatawan menjelaskan bahwa pemetaan didaerah pantai bebas memiliki kedalaman 4 meter sampai 10,3 meter dari jarak 2 meter dari pinggir pantai pada bujur 40.000 lintang 56.000, layak untuk berenang. Berdasarkan hasil penelitian ini daerah pantai bebas dihimbau kepada Dinas Pariwisata supaya membuat batas-batas zona aman renang karena jarak 10 meter dari pinggir pantai kedalaman Danau toba tidak teratur atau kedalaman Danau tidak dangkal.Kata Kunci : Sensor Sonar, Posisi Ikan, Zona Aman Renang
AKTIVASI ZEOLIT ALAM SEBAGAI ADSORBEN LOGAM BERAT Mg, Al, dan ZnO MENGGUNAKAN LARUTAN NaOH
Authors: Putri Widi Kapita , Sabani Sabani
Published: February 2019

Hasil zeolit alam yang berasal Tapanuli Selatan (Pahae) yang telah disintesis dengan metode kopresipitasi menggunakan variasi waktu yaitu variasi waktu 120,150, dan 180 menit menjadi nano zeolit. Nano zeolit tersebut kemudian dikarakterisasi dengan X-Ray Diffraction dan Scanning Electron Microscope- Energy Dispertion. Karakterisasi  dengan menggunakan XRD bertujuan untuk menentukan kemurnian dari nano zeolit yang sudah disintesis. Adapun tujuan untuk penelitian ini adalah mengetahui ukuran zeolit, struktur morfologinya, luas permukaannya dan daya adsorbsi zeolit. Hasil karakterisasi dari X-Ray Diffraction menunjukkan bahwa ukuran diameter kristalin nano zeolit variasi waktu 120 menit, 150 menit, dan 180 menit adalah 28,57 nm, 37,18 nm, dan 45,53 nm. Hasil karakterisasi Scanning Electron Microscope- Energy Dispertion dari nano zeolit variasi waktu 120, 150 dan 180 menit menunjukkan bahwa terjadi pengurangan aglomerasi dan permukaan nano zeolit lebih halus. Hasil pengujian Surface Area Analyzer  yang paling optimal terjai pada waktu 150 menit dengan nilai 108.320 m2/g. Sedangkan perhitungan % kesalahan yang paling optimal pada waktu 120 menit dengan 9.1763%.Hasil analisis uji Atomic Adsorption Spectrofotometric menunjukkan bahwa penyerapan kandungan logam atau daya adsorbsi  yang optimal yaitu pada logam Mg variasi waktu 180 menit adalah 99,99 % dibandingkan dengan penyerapan logam menggunakan zeolit waktu 150 menit dan 120 menit yaitu 99,95% dan 99,23%. Hasil karakterisasi dan pengujian dapat dijadikan acuan dalam mengukur potensi Zeolit Alam teraktivasi sebagai media adsorben. Maka dapat disimpulkan penggunaan zeolit sebagai adsorben mampu menyerap logam Mg secara optimal dengan nilai serap 99,99%.Kata Kunci : Zeolit, Metode kopresipitasi, Adsorben
KARAKTERISTIK RESPON TIKUS TERHADAP ALAT PENGHASILGELOMBANG ULTRASONIK BERBASIS ARDUINO UNO
Authors: Ibrahim Ibrahim , S Abd Hakim
Published: February 2019

Telah dilakukan penelitian yang berjudul karakteristik respon tikus terhadap alat penghasil gelombang ultrasonik berbasis Arduino Uno dengan tujuan untuk mengkarakteristikan respon tikus terhadap frekuensi ultrasonik. Alat tersebut didesain dengan dua bagian pokok perangkat, yakni perangkat lunak dan perangkat keras. Perangkat lunak terdiri dari sistem pemrograman arduino. Prinsip kerja alat diawali dengan memilih frekuensi melalui penekanan push button. Kemudian Arduino Uno akan memproses data dengan sistem PWM (Pulse Width Modullation) dan meneruskannya ke IC 386. Gelombang output yang amplitudonya sudah dikuatkan hingga 200 x penguatan kemudian dipancarkan melalui piezzo super  tweeter. Hasil analisis  yang diperoleh besar frekuensi yang mampu mempengaruhi tikus adalah 40 KHz, 50KHz dan 60 KHz pada jarak 2 meter dengan lama pemaparan selama 10 menit, dan frekuensi efisien untuk mengusik tikus adalah 60 KHz.Kata Kunci : Arduino Uno, IC 386, Frekuensi, Tikus
PENGARUH KOMPOSISI SERAT IJUK DAN BATU GAMPING TERHADAP SIFAT MEKANIK BETON
Authors: Limbong Debora , Sirait Makmur
Published: February 2019

Telah dilakukan penelitian dengan tujuan untuk mengetahui sifat mekanik dari beton yaitu  kuat tekan, kuat tarik dan daya serap air setelah penambahan serat  ijuk dan batu gamping dalam campurannya. Penelitian ini dilakukan di Laboratorium beton teknik sipil USU mulai dari bulan juni 2018 sampai dengan bulan Juli 2018. Metode pembuatan  yang dilakukan adalah beton berbentuk silinder dengan ukuran diameter 15 cm dan tinggi 30 cm. campuran beton yang digunakan mengacu pada beton mutu  rendah K175 dengan perbandingan campuran semen : pasir : kerikil adalah 1:2:3. Variasi perbandingan serat ijuk dan batu gamping  yang ditambahkan kedalam campuran beton sebesar 0,5% : 5%, 2%: 15%, 4%: 25% dari agregat halus, dan sampel diuji setelah perawatan 28 hari. Dari hasil pengujian diperoleh nilai kuat tekan tertinggi sebesar 23,3 MPa, nilai kuat tarik tertinggi 2,6 MPa dan daya serap air sebesar 2,28% dari massa keringnya  pada penambahan 0,5%  serat ijuk dan 5% batu gamping dalam campuran beton.Kata Kunci : Palm, Limestone, Compressive Strength, Tensile Strength and Water Absorption
PENENTUAN MINERAL KALSIT DAN DOLOMIT PADA CITRA HASIL THIN SLICE BATUAN KARBONAT MENGGUNAKAN JARINGAN SYARAF TIRUAN BERBASIS MATLAB
Authors: Pohan Siti Hajar , Sani Ridwan Abdullah
Published: February 2019

Telah dilakukan penelitian yang berjudul penentuan mineral kalsit dan dolomit pada citra sayatan tipis batuan karbonat menggunakan metode jaringan syaraf tiruan berbasis Matlab dengan tujuan untuk pengembangan metode petografi thin slice batuan. Pada penelitian ini dilakukan identifikasi mineral kalsit dan dolomit menggunakan metode pengolahan citra hasil thin slice batuan karbonat. Metode pengolahan citra yang digunakan pada penelitian ini adalah metode jaringan syaraf tiruan Extreme Learning Machine (ELM) dan ekstraksi ciri menggunakan metode Gray Level Co-occurrence Matrix (GLCM). Hasil dari penelitian meunjukkan keberhasilan program dapat mengidentifikasi mineral kalsit dan dolomit dengan besar persentase keberhasilan mencapai 90%.Kata Kunci : Kalsit, Dolomit, Matlab, Jaringan Syaraf Tiruan
IDENTIFIKASI PERMUKAAN DAERAH GEOTHERMAL PLTP SARULLA UNIT I MENGGUNAKAN CITRA SATELIT DI KECAMATAN PAHAE JAE KABUPATAN TAPANULI UTARA
Authors: Panggabean Yowlanda , Tampubolon Togi
Published: February 2019

Perubahan lingkungan dapat diidentifikasi dengan memanfaatkan teknologi SIG. Penelitian ini menggunakan data citra satelit Landsat 8 OLI  dengan Path 129 dan Row 058 dengan periode waktu yakni tahun 2010, 2014, 2016, 2017 dan 2018. Metode penelitian yang digunakan pada penelitian ini yakni survey lapangan untuk suhu dan teknik penginderaan jarak jauh yang bertujuan untuk menganalisis perubahan lingkungan. Survey lapangan dilakukan di Kabupaten Tapanuli Utara yang terletak dikoordinat 1° 20’ - 2° 41’ LU dan 98°05’–99°16’ BT. Analisis perubahan lingkungan dilihat dengan adanya perubahan suhu dan vegetasi atau NDVI (Normal different Vegetation Index). Parameter NDVI memiliki nilai secara berurutan yakni 0.6, 0.4, 0.3, 0.25 dan 0.3 yang menunjukkan adanya penurunan tingkat kehijauan vegetasi. Nilai suhu secara berurutan yakni 22.42°C, 26.66°C, 22.08°C, 29.52°C dan 19.53°Cyang menunjukkan adanya peningkatan suhu. Hubungan antara NDVI dan LST berbanding terbalik, apabila nilai NDVI tinggi maka nilai LST rendah, dan sebaliknya apabila nilai NDVI rendah maka nilai LST tinggi.Kata Kunci : Kabupaten Tapanuli Utara, PLTP Sarulla Unit I, Geothermal, Landsat 8 OLI, suhu (LST) dan NDVI.
RANCANG BANGUN SISTEM PENGONTROL LAMPU OTOMATIS BERBASIS ARDUINO UNO R3 DAN SMARTPHONE
Authors: Girsang Zulkifli , Ritonga Winsyahputra
Published: February 2019

Telah dilakukan penelitian rancang bangun sistem pengontol lampu otomatis menggunakan arduino uno R3 berbasis smartphone dengan tujuan untuk menciptakan suatu alat yang dapat mengontrol hidup, mati dan intensitas lampu. Lampu merupakan suatu alat penerang yang digunakan didalam rumah, kantor dan sebagainya. Dengan adanya alat pengontrol lampu otomatis ini, maka pengguna dapat mengontrol hidup, mati serta intensitas dengan menggunakan smartphone, sehingga dapat mengurangi pemborosan pemakaian listrik. Dalam sistem pengontrol yang dirancang menggunakan mikrokontroler arduino uno R3 , bluetooth HC-05, relay, Lcd 16x2, rangkaian diming, dilengkapi juga dengan led indikator relay. Sistem pengontrol dapat dikoneksikan ke smartphone karena telah dilengkapi dengan bluetooth HC-05 sebagai penerima data dari smartphone yang telah diinstal aplikasi pengontrol lampu otomatis. Dalam pengujian sistem pengontrol, bluetooth smartphone dapat terhubung dengan sistem pengontrol mencapai 30 meter tanpa penghalang dan 16 meter dengan penghalang. Pengujian pengontrolan di apikasikan dengan lampu 15 watt dan 3 watt dengan jarak pengujian dimulai 1 meter hingga 15 meter. Berdasarkan hasil pengujian dari sistem pengontrol dapat disimpulkan bahwa system dapat berjalan dan berfungsi dengan baik, setiap perintah dari smartphone dapat diproses mikrokontroler sehingga lampu dapat dikontrol. Aplikasi smartphone dirancang di App Inventor. Saklar pengontrolan terdiri dari penggontrolan menggunakan tombol on dan off, saklar suara, saklar timer dan saklar diming..Kata Kunci : Lampu, Arduino Uno R3, rangkaian diming, Intensitas, App Inventor dan Bluetooth HC- 05
Estás burdas de loco y trabajas burda. Un "nuevo" cuantificador en el español de Venezuela
Authors: Pato Enrique , Casanova Vanessa
Published: February 2019

El presente trabajo se centra en la descripción de burda (de), forma propia del español actual de Venezuela, con un valor cuantificador e intensificador cercano a ‘muy, en cantidad, demasiado’. El primer objetivo es la comprobación de su estatuto adjetival y adverbial, así como las clases de palabras que puede acompañar. Los resultados permiten constatar que las estructuras más frecuentes son burda de + A (burda de dulce) y burda de + N (burda de esfuerzo), antecedidas por los verbos ser, tener y estar. En menor medida, burda deprecede a adverbios de tiempo, lugar y manera (burda de mal). Por otro lado, la construcción burda (‘mucho’) sirve como intensificador verbal (se tardan burda) y adjetival, con un valor cercano a ‘muy’ pero en posposición (pana burda). Después, se intenta descifrar su origen y proceso de gramaticalización. Constatado que su empleo no se restringe solo al ámbito del lenguaje juvenil, se concluye que burda (de) es un marcador de origen, es decir una forma vernácula que contribuiría a definir la identidad “nacional” del hablante.
Experimental bearing capacity of eccentrically loaded foundation near a slope
Authors: Mansouri Tarek , Abbeche Khelifa
Published: February 2019

Based on the response of small-scale model square footing, the present paper shows the results of an experimental bearing capacity of eccentrically loaded square footing, near a slope sand bed. To reach this aim, a steel model square footing of (150 mm × 150 mm) and a varied sand relative density of 30%, 50% and 70% are used. The bearing capacity-settlement relationship of footing located at the edge of a slope and the effect of various parameters such as eccentricity (e) and dimensions report (b/B) were studied. Test results indicate that ultimate bearing capacity decreases with increasing load eccentricity to the core boundary of footing and that as far as the footing is distant from the crest, the bearing capacity increases. Furthermore, the results also prove that there is a clear proportional relation between relative densities –bearing capacity. The model test provides qualitative information on parameters influencing the bearing capacity of square footing. These tests can be used to check the bearing capacity estimated by the conventional methods.