bluuebunny/crossref_metadata_2025 huggingface dataset:
NETWORK COMPETENCE AND FIRM PERFORMANCE: THE MEDIATING ROLE OF ENTREPRENEURIAL INNOVATIVENESS AMONG MALAYSIAN CHINESE ENTREPRENEURS OF WHOLESALE BUSINESSES
Authors: Sulaiman Sajilan  , Shehnaz Tehseen
Published: March 2019

Entrepreneurial innovativeness has been considered as one of the crucial factors for any firm to achieve its superior performances. The aim of this paper is to analyse the mediating effect of entrepreneurial innovativeness in the relationship between network competence and firm performances including financial performance, non-financial performance, and business growth. Data were collected from 150 Malaysian Chinese wholesalers from the states of Selangor and Kuala Lumpur. Non-probability sampling technique was used to get the target respondents. PLS-SEM technique was used to analyse the data. The results revealed positive as well as significant mediating influence of entrepreneurial innovativeness in the relationship between network competence and firm performances. This study also provides future recommendations and managerial implications.
THE ROLE OF SUPPORT ON START-UP SUCCESS: A PLS-SEM APPROACH
Authors: Daisy Mui Hung Kee  , Yusmani Mohd Yusoff  , Sabai Khin
Published: March 2019

A start-up plays a significant role in the economic growth, employment opportunity, incubators for eco-innovation, and create a new market. Despite their important roles towards the economic and social growth, start-ups face difficulty in sustaining and surviving as the failure rate of start-up range between 50% and 95%, especially in emerging countries such as Malaysia. Therefore, it is important for start-ups in developing countries to identify specific support services that determine their success. In this study, we focus on technology-related, market-related, finance-related, and soft-related supports received by start-ups in Malaysia. The present study has collected data from 500 startups in Malaysia who were recipients of the funding from Malaysia government agencies. To the best of our knowledge, this study provides the first statistical test of how start-ups who were business owners or business partners receiving funding or support from the government agencies view the support system. Based on the analysis, this study provides evidence that support matters to start-up success. Technology-related, finance-related, and soft-related supports hold a significant relationship with the start-up success, while surprisingly, market-related support did not have a significant relationship with start-up success. Our results have extended previous research by highlighting the importance of these supports in driving start-up success and indicating how each dimension of these support services either enhances or inhibits start-up success.
MODELLING COMMODITY FUTURES PRICES: THE CASE OF CRUDE PALM OIL FUTURES
Authors: Khalil Ahmed  , Zurina Shafii  , Amir Shaharuddin  , Siti Nurazira Mohd
Published: March 2019

The present paper seeks to fulfil the gap of knowledge in crude palm oil futures (FCPO) by employing unobserved component (UC) methodology. It may perhaps be the first study in Malaysian capital market to examine FCPO prices using UC model. The empirical results indicate that FCPO presents a permanent behaviour. The transitory component exhibits a higher degree of persistence with a periodicity of approximately one year. In addition, the model of the study has proven its ability to capture unobserved characteristics of FCPO’s time series price and has shown a satisfactory performance for the sampled period in terms of fit. This study implicates that understanding the cyclical pattern, duration, and persistence provides important information that would help to create an appropriate strategy to manage risks, smooth and stabilise returns over the FCPO cycle. Such a strategy would ensure the stability and sustainability of the FCPO market.
In‐Season Application of Nitrogen and Sulfur in Winter Wheat
Authors: Dhillon Jagmandeep , Dhital Sulochana , Lynch Tyler , Figueiredo Bruno , Omara Peter , Raun W. R.
Published: March 2019

Core Ideas

Decreased atmospheric deposition has led to increased S consumption in winter wheat.

Sulfur did not increase yield or grain N concentration at any site.

Use of recommended soil testing guides are encouraged.

Decreased atmospheric S deposition in the past 20 yr has led to increased S fertilizer consumption in winter wheat (Triticum aestivum L.). Producers often apply S without any soil test information. Experiments were conducted at Lahoma, Lake Carl Blackwell, and Perkins, OK (2011–2013) to assess the effect of N and S applied preplant and foliar on grain yield and grain N for winter wheat. In 2011–2012, urea ammonium nitrate (UAN) was applied preplant at rates of 40 and 80 kg N ha−1 additionally; UAN and urea‐triazone (NSURE) were foliar‐applied at rates of 10 and 20 kg N ha−1. Sulfur was foliar‐applied as gypsum (CaSO4⋅2H2O) at 6 kg S ha−1. In 2013, trials were altered to apply 40 kg N ha−1 as UAN preplant, and 20 kg N ha−1 foliar‐applied. Gypsum rates were adjusted at 0, 3, and 6 kg S ha−1 preplant, and S (MAX‐IN‐S) at 3 and 6 kg S ha−1 was foliar‐applied. Sulfur did not increase grain yield or grain N concentration at any site. The interaction between foliar S and N and preplant S and N was not significant. Sulfur fertilizer application is less likely to benefit this region unless low levels of soil test S are identified before planting. Use of recommended soil‐testing guides are encouraged. Although S applications are encouraged commercially, no response was observed in these trials, and all were on sites where soil organic carbon was low (<8.5 g kg−1), where the possibility of seeing S deficiency was greater.
Yield and N Utilization of Transplanted and Direct‐Seeded Rice with Controlled or Slow‐Release Fertilizer
Authors: Hou Pengfu , Xue Lixiang , Zhou Yuling , Li Ganghua , Yang Linzhang , Xue Lihong
Published: March 2019

Core Ideas

CSRF application (RBBbasal, RBBBP, SCUBP) increased the NUE in both seedling‐transplanted and direct‐seeded fields.

Yield increase of resin‐blending controlled‐release fertilizer was better than that of sulfur‐coated fertilizer under the two planting modes.

“Base‐panicle” fertilization with RBB and urea was suitable for the seedling‐transplanted mode.

A single basal application of RBB was suitable for direct‐seeded mode for achieving the high yield.

To understand the response of rice yield and N utilization to controlled or slow‐release fertilizers (CSRFs) under direct‐seeded or seedling‐transplanted modes of rice production, a field experiment with rice variety Wuyunjing 23 was performed in 2013 and 2014. Five treatments, including two CSRFs: sulfur‐coated urea (SCU) and resin‐blending controlled‐release fertilizer (RBB), two fertilization modes: single basal application and a split “base‐panicle” (BP) application, and conventional split fertilization (CONV) as a control, were conducted. The results showed that there was no improvement of yield for SCU application compared with CONV in the seedling‐transplanted and direct‐seeded modes in both years. The yield increasing effect of RBB was better than that of SCU under the two planting modes. The interaction effect between the planting mode and fertilizer treatment on the yield was significant. The yield of RBBBP treatment was the highest in seedling‐transplanted fields, reaching 12.04 t ha−1 in 2013 and 13.44 t ha−1 in 2014. By contrast, the yield of RBBbasal treatment was the highest in direct‐seeded rice, although the difference among the treatments was not significant. The CSRF application (RBBbasal, RBBBP, SCUBP) increased the NUE in both the seedling‐transplanted and direct‐seeded fields. Except for the NUE of RBBbasal, which was the highest for direct‐seeded rice in 2013, the RBBBP treatment showed the highest NUE in seedling‐transplanted and direct‐seeded rice in both years. The results indicated that RBB increased the yield and NUE in both seedling‐transplanted and direct‐seeded modes, and the combined panicle urea and RBB was better in seedling‐transplanted fields, while a single basal application with RBB was better in direct‐seeded rice.
Evaluation of Commercial Additives Used with Granular Urea for Nitrogen Conservation
Authors: Goos R. Jay , Guertal Elizabeth
Published: March 2019

Core Ideas

Urease and nitrification inhibitors can reduce N loss from granular urea.

Agrotain Ultra functioned as a urease inhibitor, Nutrisphere‐N, and NZone did not.

Agrotain Ultra reduced ammonia volatilization, Nutrisphere‐N, and NZone had little effect.

SuperU and Instinct inhibited nitrification, Nutrisphere‐N, and NZone did not.

Urea is subject to loss by ammonia volatilization, and, after nitrification, by leaching and denitrification. This study evaluated commercial products marketed as fertilizer additives for granular urea for the purpose of reducing N loss. In a urea hydrolysis study, urea granules were applied to three soils, and hydrolysis measured for 10 d. The urea granules were untreated, or treated with Nutrisphere‐N (Verdesian Life Sciences, Cary, NC), NZone (AgXplore, Parma, MO), or Agrotain Ultra (Koch Agronomic Services, Wichita, KS). Agrotain Ultra was effective in slowing urea hydrolysis, but amending the granules with Nutrisphere‐N and NZone did not slow urea hydrolysis. In a ammonia volatilization study, the treatments were the same, two soils were used, and volatilization was measured over 14 d. Agrotain Ultra was effective in reducing ammonia loss compared to untreated urea granules, but amending the granules with Nutrisphere‐N and NZone had little effect. In a nitrification study, three soils were treated with urea granules, SuperU granules (Koch Agronomic Services, Wichita, KS), or urea granules treated with Nutrisphere‐N, NZone, or Instinct (Dow Agrosciences, Indianapolis, IN). The progress of nitrification was measured after 2 and 4 wk of incubation. SuperU granules, or granules treated with Instinct nitrified more slowly than untreated urea granules, amending urea granules with Nutrisphere‐N and NZone did not slow nitrification. The three experiments do not support the use of Nutrisphere‐N or NZone as fertilizer additives for granular urea, for the purpose of reducing N loss.
Comparing soil test kits with standard lab‐based soil tests for agricultural soils
Authors: Sharma Swati , Chatterjee Amitava
Published: March 2019

Growers often have questions regarding the reliability of the commercial soil NPK test kits for understanding their soil's N, P, and K availability. This article compares and evaluates four soil NPK kits—(i) Rapitest, (ii) LaMotte, (iii) Hanna, and (iv) Hach—with standard laboratory methods for analyzing soil available N, P, and K. Earn 0.5 CEUs in Soil & Water Management by reading this article and taking the quiz at www.certifiedcropadviser.org/education/classroom/classes/649.
Method for Early Generation Soybean Population Selection Using F2 High‐Parent Heterosis Testing
Authors: Hegstad J. M. , Nelson R. L. , Chaky J. M.
Published: March 2019

The germplasm pool for North American soybean [Glycine max (L.) Merr.] is narrow, and identifying novel and useful genetic diversity is time consuming and expensive. The objective of this research was to develop an early‐generation population screening method to select diversity × elite populations. The F2 high‐parent heterosis (F2 heterosis) was used as a tool to identify populations with the greatest potential for producing high‐yielding lines in subsequent generations. For Set 1 populations, six populations were selected for significantly positive F2 heterosis, and six were selected for significantly negative F2 heterosis. When these populations were advanced into plant row yield trials, five out of six populations with positive F2 heterosis had the highest average yield for the top 5% of the lines, and five out of six populations with negative F2 heterosis had the lowest average yield for the top 5% of the lines. For Set 2, two populations with the highest positive F2 heterosis value had significantly higher average population yield and average top 5% selection yield compared with two populations with negative F2 heterosis. Differences in combining ability were evident in both sets of populations, as two populations with one parent in common may have opposite classifications for F2 heterosis. Using F2 heterosis as an early‐generation population selection tool may enable the focus of resources to identify which populations have the best opportunity to develop high‐yielding lines with unique diversity. These data will need to be verified in replicated yield testing over multiple years and locations.
CONSERVING GENIUS LOCI
Authors: Widodo Johannes
Published: March 2019

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Assessing local materials for the treatment of wastewater in open drains
Authors: Jamwal Priyanka , Phillips Daniel , Karlsrud Kim
Published: March 2019

In the present study, three low-cost filter aggregate materials were tested and compared for organic matter and fecal coliform (FC) removal at the laboratory scale. Setups were subjected to synthetic wastewater at two hydraulic loading rates (HLR), i.e. 4 cm/day and 40 cm/day. The hydraulic retention time (HRT) at the two HLRs varied from 4 days to 12 h, respectively. The result obtained shows that the biochemical oxygen demand (BOD5) removal efficiency of aggregate materials decreased with the increase in HLR. Both at high and low HLR, the terracotta aggregate material exhibited maximum BOD5 loading removal and without significant difference for the case of FC removal efficiency for all the three aggregate materials. At higher HLR, cell debris and biofilm loss from the aggregate material contributed to the chemical oxygen demand (COD) levels in the treated water. The terracotta aggregate material provided best organic matter removal at both HLRs. The study demonstrates the potential of incorporating inexpensive and readily available local materials into decentralized, frugal green infrastructure interventions capable of lowering the quantum of harmful biological contaminants in open storm water channels in rapidly urbanizing cities of developing countries, and that the terracotta aggregate material provided best organic removal at both HLRs.
PROTAGONISMO SOCIAL E MEDIAÇÃO DA INFORMAÇÃO
Authors: Gomes Henriette Ferreira
Published: March 2019

Abordagem do protagonismo social, analisando sua relação com a informação, concluindo pela compreensão deste como objetivo do trabalho informacional, situando a mediação da informação como sua ação central. Parte da apresentação das origens conceituais em torno do protagonismo, buscando, à medida que debate as referências acerca do tema, demonstrar a relação do desenvolvimento do protagonismo social com o trabalho informacional, assim como sua posição de meta da atividade da mediação da informação, executada nas suas cinco dimensões e na condição de elemento central desse trabalho. As assertivas apresentadas são resultado do estudo crítico da bibliografia da área da Ciência da Informação que aborda o protagonismo e a mediação da informação, assim como de estudos de filósofos e pensadores que abordam os aspectos sociais e políticos da comunicação e da formação de sujeitos socialmente ativos, permitindo a identificação das relações entre protagonismo e mediação da informação, como também que a mediação consciente favorece o primeiro, concluindo que o apoio ao seu desenvolvimento representa a principal responsabilidade social do trabalho com a informação.
ETHICS AND AESTHETICS CRITERIA AS VALID SUPPORT TO RESEARCH
Authors: De Paula Darlei
Published: March 2019

This article aim to show the aesthetics and ethics values whose relation traces could be found in theological text studies. We use bibliographic review as methodology to this research. Considering these elements and how it was found we ask: how can we validate such elements to understand the theological text? When we are analyzing ethics behaviors can we consider the found results as intrinsic values in such discoveries and can it be compared in different times, in other words, it is available if we bring it out to our time without prejudice considering criteria. We know values and beliefs can change according different times, but the main question that translates our doubt is: how can we consider the ethical and aesthetical values described in different times avoiding damage then to be impartial in the research? In spite of lots of doubts rose, what can support on our research reading are historic and current images we can validate as support line to comparative analysis considering ethics and aesthetics values found. This text will be presented as communication in this event.Key Words: Methodology. Ethics and research. Aesthetics and research. Theological methodology.
RIGHT-WING POPULISM, INFORMATION, AND KNOWLEDGE
Authors: Day Ronald E.
Published: March 2019

‘New media’ information technologies were recently thought to be so intrinsically different from ‘old,’ mass media, technologies that fascism would no longer be possible. Through new media information and communication technologies, the political ‘mass’ was supposedly replaced by the ‘crowd’ or the ‘swarm,’ and an old mass media replaced by a new media serving individual ‘information needs.’ However, extreme right-wing political populism and encroaching fascism today are world-wide phenomena in developed countries, not only despite new media, but partly because of it. How is this possible?
PREFACE
Authors: Lima Clovis Ricardo Montenegro de
Published: March 2019

Preface
CONHECIMENTOS PARA QUE? TRANSFORMAÇÕES DA ORDEM DOS SABERES NO TEMPO
Authors: Crippa Giulia
Published: March 2019

Este artigo busca discutir, dentro da Ciência da Informação, como se orienta o conhecimento em função de suas finalidades. Aborda a relação entre Ciência da Informação e ordem do conhecimento, em uma perspectiva genealógica, observando como se orientam os registros de informação perante a finalidade atribuída ao conhecimento, que se desdobra em sua organização, ao longo da Modernidade (do século XVI à primeira metade do século XX) para entendermos como se estrutura uma organização cientificista do conhecimento. Discute a relação entre heurística e métricas. Observa as mudanças ocorrida entre um sistema de conhecimento fundamentado em bibliotecas e outro atrelado às Tecnologias de Informação e Comunicação. Analisa alguns aspectos da organização do conhecimento nas bibliotecas ao longo da modernidade, destacando alguns elementos constitutivos da confiabilidade dos registros.
EXPEDIENTE
Authors: Lima Clovis Ricardo Montenegro de
Published: March 2019

Expediente
Mobile Health Applications for Prenatal Assessment and Monitoring
Authors: Gyselaers Wilfried , Lanssens Dorien , Perry Helen , Khalil Asma
Published: March 2019

Background:

A mobile health application is an exciting, fast-paced domain that is likely to improve prenatal care.

Methods:

In this narrative review, we summarise the use of mobile health applications in this setting with a special emphasis on both the benefits of remote monitoring devices and the potential pitfalls of their use, highlighting the need for robust regulations and guidelines before their widespread introduction into prenatal care.

Results:

Remote monitoring devices for four areas of prenatal care are reported: (1) cardio-tocography; (2) blood glucose levels; (3) blood pressure; and (4) prenatal ultrasound. The majority of publications are pilot projects on remote consultation, education, coaching, screening, monitoring and selective booking, mostly reporting potential medical and/or economic benefits by mobile health applications over conventional care for very specific situations, indications and locations, but not always generalizable.

Conclusions:

Despite the potential advantages of these devices, some caution must be taken when implementing this technology into routine daily practice. To date, the majority of published research on mobile health in the prenatal setting consists of observational studies and there is a need for high-quality randomized controlled trials to confirm the reported clinical and economic benefits as well as the safety of this technology. There is also a need for guidance and governance on the development and validation of new apps and devices and for the implementation of mobile health technology into healthcare systems in both high and low-income settings. Finally, digital communication technologies offer perspectives towards exploration and development of the very new domain of tele-pharmacology.
Bioactive Medications for the Delivery of Platelet Derivatives to Skin Wounds
Authors: Bonferoni Maria Cristina , Rossi Silvia , Sandri Giuseppina , Caramella Carla , Del Fante Claudia , Perotti Cesare , Miele Dalila , Vigani Barbara , Ferrari Franca
Published: March 2019

Chronic wounds are the result of alterations in the complex series of events of physiological
wound healing. In particular, the prolonged inflammation results in increased protease activity, in the
degradation of extracellular matrix (ECM) and of growth factors (GFs). The relevance of platelet GFs in
maintaining and restoring the complex equilibrium of different moments in wound healing is well recognized.
Moreover, the observed decrease of their levels in chronic wounds suggested a possible therapeutic
role of the external application to the wounds. It has been also pointed out that tissue regeneration
can be more efficiently obtained by the synergic use of different GFs. Platelet derivatives such as platelet-
rich plasma (PRP) and platelet lysate (PL) are able to release GFs in a balanced pool. Their therapeutic
use in regenerative medicine and wound healing has been therefore more and more frequently proposed
in clinical trials and in the literature. The development of a suitable formulation able to control
the GFs release rate, to protect the GFs, and to assure their prolonged contact with the wound site, is of
paramount importance for the therapeutic success. The present review considers some formulation approaches
for PRP and PL application to wounds.
Next Generation Medical Management of Postpartum Hemorrhage
Authors: Phillips Jaclyn M. , van den Anker John N. , Ahmadzia Homa K.
Published: March 2019

Background:

Postpartum hemorrhage remains a significant contributor to morbidity and mortality of
women of childbearing age worldwide. Trends in both incidence and severity of postpartum hemorrhage are
increasing which makes it imperative to identify drugs that could target prevention and/or treatment of these
postpartum hemorrhages for women living in high, middle and low-income countries.

Methods:

We have reviewed current advances in the medical management of postpartum hemorrhage focusing on
non-uterotonic therapy. We specifically describe the use and mechanism of action of tranexamic acid (TXA) and
fibrinogen concentrate. Furthermore, we address the existing data for using these medications in postpartum hemorrhage,
highlighting both strengths and limitations.

Results:

This review describes a new generation of medications that are promising for the prevention and/or
treatment of postpartum hemorrhage. For patients at risk for significant hemorrhage, TXA has been shown to
reduce intraoperative blood loss and can be given as a prophylactic agent. For the treatment of postpartum hemorrhage,
early use of TXA has the potential to reduce mortality. In addition, some data exists supporting the use of
fibrinogen concentrate, though more studies are required to help formulate guidelines for its use.

Conclusion:

A promising new approach for the management of severe postpartum hemorrhage is using medications
that alter coagulation. More data are needed to describe ideal patient populations, dosing, the time of administration,
and infusion rate.
Steroids and Postoperative Complications in IBD
Authors: López-Sanromán Antonio
Published: March 2019

Corticosteroids are frequently used in the management of Inflammatory Bowel Disease. Although
they can be very useful, their potential adverse effects have to be kept in mind. One of the
situations in which these drugs should be avoided, if possible, is the perioperative setting. If a patient
reaches surgery while on steroids, surgical complications will be more likely to occur, both infectious
and non-infectious. Attention should be paid to this fact, within a multidisciplinary approach, that also
takes into account other factors, such as nutrition.
Mapping the Access of Future Doctors to Health Information Technologies Training in the European Union: Cross-Sectional Descriptive Study (Preprint)
Authors: Giunti Guido , Guisado-Fernandez Estefania , Belani Hrvoje , Lacalle-Remigio Juan R
Published: March 2019

BACKGROUND

Health information technologies (HITs) such as electronic health records (EHR) and telemedicine services are currently used to assist clinicians provide care to patients. There are many barriers to HIT adoption, including mismatches between investments and benefits, disruptions in the workflow, and concerns about privacy and confidentiality. The lack of HIT training of health professionals as a workforce is an increasingly recognized and understudied barrier.

OBJECTIVE

The purpose of this study is to describe what courses on HIT topics are available at the graduate level for future health professionals in the European Union (EU) and to explore possible determining factors for their exposure to these courses.

METHODS

A cross-sectional descriptive study of EU medical schools was performed to explore the prevalence of HIT courses. The curricula of all identified higher learning institutions that offer a medical degree were manually explored to identify graduate-level courses that offer specific training on HIT topics. HIT topics were defined as courses or subjects that provided knowledge on the design, development, use, and implementation of HIT. Associations among potential factors such as population, yearly medical graduates, total number of physicians, EHR presence, and gross domestic product (GDP) were explored.

RESULTS

A total of 302 medical schools from the 28 member states of the EU were explored. Only about one-third (90/302, 29.80%) of all medical degree curricula offered any kind of HIT course at the graduate level; in the medical schools that offered HIT courses, the courses were often mandatory (58/90, 64.44%). In most EU countries, HIT courses are offered in less than half of the medical schools, regardless of the country’s GDP per capita. Countries with the highest percentages of HIT course presence have the lowest GDP per capita. There seems to be a weak inverse correlation (–0.49) between the two variables (GDP per capita and HIT course presence). There is a trend between the availability of medical human resources and an increase in the presence of HIT courses, with Romania, Croatia, and Greece as outliers in this respect.

CONCLUSIONS

The current state of medical training in the EU leaves much room for improvement. Further studies are required for in-depth analysis of the content and manner of instruction that would fit present and future needs of HIT.
The House of the Little Tooth Diniz: An Oral Health Educational Project
Authors: Dias Maria do Rosário
Published: March 2019

Dental caries is currently one of the major public health problems, given its high incidence among 6-12-year-old children. This age group of children is considered a priority group, due to the transitional period of the replacement of deciduous teeth. This article intends to present a ludic-pedagogical instrument for oral health education, targeted at these children, based on the learning of problems related to oral health through a story narrative and associated pictograms. By means of a health education manual with several pictorial representations of dentistry clinical acts, we intended to imagetically reinforce the therapeutic adherence of children to Paediatric Dentistry as well as oral health prevention care, which are considered determinant factors for oral health success amongst children. The choice of a handbook format for this purpose was considered a health education pedagogical strategy with added value to the Paediatric Dentistry appointment setting, granting patients an active and leading role in their therapeutic path. The handbook can also be of use to younger children, through parental storytelling, establishing a dyadic communication between parents, educators and professionals.
Science, Technology, and Medicine have Progressed Immensely during the Last Five Centuries, yet Mankind Is Threatened by Self-Destruction
Authors: Balaban Alexandru T.
Published: March 2019

During the last 5900 years, creative human minds have dispelled false beliefs about our universe, as well as chemical, physical, and biomedical phenomena. Life expectancies in most inhabited parts of our world have increased appreciably. A brief survey of those who contributed to the progress of science, technology, and understanding is presented. Yet, primitive instincts and ambitions still dominate our world, and conflicts threaten to destroy life on this planet by way of nuclear weapons. Societies are ruled by politicians and militaries, for scientists are “on tap, but not on top”. The contrast between reason-based progress and instinct-based aggression is mind-boggling.
Структура каналов для считывающей электроники кремниевых детекторов
Authors: Воронин А.
Published: March 2019

Одна из особенностей считывающей электроники (СЭ) аппаратуры для экспериментов в области физики высоких энергий и других классов приборов, использующей кремниевые системы детектирования ионизирующих излучений, – многоканальность. В статье рассмотрены основные структурные решения для СЭ и факторы, влияющие на выбор структурной схемы многоканальной детектирующей системы.
Программные и аппаратные преобразования ближнего поля в соответствии с требованиями к измерениям в свободном пространстве систем связи 5G
Authors: Дерат Б. , Роуэлл К. , Танкелюн А. , Шмитц С.
Published: March 2019

Рассмотрены программные и аппаратные преобразования ближнего поля, которые можно использовать для измерения в свободном пространстве характеристик систем связи 5G. Отмечены преимущества различных методов преобразования.
Energi Alternatif Melalui Getaran Beban Mekanis
Authors: Putra Dimas Ramadhan , Oktoricoento Jhav Sund , Sahrudin Sahrudin , Mujirudin Mohammad , Ramza Harry , Heriyani Oktarina , Maddu Akhiruddin
Published: March 2019

Kebutuhan listrik selalu meningkat seiring berjalannya waktu. Listrik merupakan salah satu kebutuhan sangat penting yang digunakan untuk memudahkan kehidupan manusia, misalnya untuk penerangan saat malam hari, menjalankan peralatan rumah tangga serta untuk berbagai pekerjaan manusia lainnya.Penelitian ini memuat tentang pemanfaatan getaran beban mekanis yang berasal dari sepeda motor sebagai sumber getaran dan piezoelektrik digunakan sebagai media konversi getaran dengan beban yang berbeda-beda sebagai penghasil sumber energi. Penelitian ini dilakukan dengan membuat model prototipe skala kecil yang diuji dengan multimeter digital DT830B.Data yang didapat dari pengujian sensor piezoelektrik menunjukan ketika penyusunan secara seri, daya keluaran yang dihasilkan paling tinggi 19.4888 µW dengan beban maksimum 186 kg, sedangkan untuk penyusunan sensor secara parallel daya yang dihasilkan mencapai 61.5043 µW dari beban 186 kg sebagai indikasi getaran beban mekanis yang diberikan.
Perancangan Internet Supervisory Control dan Data Acquisition (I –Scada) Universitas Bung Hatta
Authors: Dani Febry Rachma , Candra Feri , Soesilo Eddy
Published: March 2019

I-SCADA merupakan suatu sistem pengendalian alat jarak jauh berbasis web atau menggunakan jaringan internet, dengan kemampuan memantau dan mengendalikan data-data dari alat yang dikendalikan. Teknologi I-SCADA memungkinkan mengontrol dan memonitoring secara langsung kondisi tersebut. Dalam sistem monitoring dan pengontrolan ini dilakukan pengukuran besaran listrik seperti arus, tegangan, daya dan faktor daya serta mengontrol unit-unit beban pada Universitas Bung Hatta Kampus Proklamator III ruangan A11 (IT ROOM). Adapun tujuan penelitian ini adalah untuk membuat alat pengontrol dan monitor energi listrik ruangan A11 (IT Room) Kampus Proklamator III Universitas Bung Hatta dari jarak jauh berbasis web. Alat yang dibuat terdiri dari komponen – komponen seperti sensor arus, sensor tegangan tegangan ,relay, Arduino Mega, Modul Ethernet Shield serta dilengkapi dengan fasilitas server web. Masing-masing komponen diuji sebelum dirangkai menjadi sebuah sistem. Dari hasil enam kali pengujian didapatkan error 0 % dan waktu komunikasi 1.16 detik- 1.30 detik.
Perancangan Conveyor Mini untuk Pemilahan Buah Berdasarkan Ukuran yang Dikendalikan oleh Mikrokontroller Atmega16
Authors: Harahap Partaonan , Oktrialdi Benny , Cholish Cholish
Published: March 2019

Berkembang dan bervariasi, untuk memenuhi kebutuhan tersebut industri membutuhkan suatu alat yangdapat mengontrol dan mengendalikan proses permesinan secara otomatis sehingga mempermudah danmenghemat tenaga manusia. sebagian besar industri menerapkan sistem control menggunakanMikrokontroller sebagai alat kontrol kerja produksi, seperti  alat conveyor untuk pemilahan buah berdasarkan ukuran yang dikendalikan oleh Mikrokontroller ATMEGA16, dengan menggunakan sensorultrasonic sebagai pengukur ukuran objek dan kombinasi photodioda dan motor servo dapat mendeteksikeberadaan objek lalu dapat mensortirnya. Perancangan conveyor pada penelitian ini menggunakan jenis Belt Conveyor dengan komponen utama roller dari bahan pvc, kerangka dari bahan akrelit, sabuk (Belt) dari bahan lakban, motor dc sebagai penggerak sabuk juga roda gigi (pulley) dan Terdapat 3 buah motor servo yang difungsikan untuk memilah buah jeruk berdasarkan ukuran kecil, sedang, dan besar. Perancangan conveyor yang dilengkapi pemilah benda ini dapat dibuat dengan menggunakan ATMEGA 16 sebagai kontrolernya. Sensor ultrasonic HC-SR04 berfungsi dengan baik untuk mengukur ukuran objek, dan kombinasi photodioda dan motor servo dapat mendeteksi keberadaan objek lalu dapat memilahnya. Kemudian data dicacah oleh mikrokontroller dan ditampilkan pada layar LCD.
Perancangan Sequencing Chiller untuk Menstabilkan Temperatur Suhu Ruangan Menggunakan Programmable Logic Control (PLC)
Authors: Septian Dendy Achmad , Roza Emilia , Rosalina Rosalina
Published: March 2019

Penggunaan chiller sebagai pendingin ruangan sudah banyak digunakan di perkantoran maupun industri. Belum adanya automatisasi pada alat pendingin menyebabkan muncul kendala suhu yang dihasilkan pendingin masih naik turun tergantung keadaan cuaca. Selain itu jumlah chiller yang digunakan juga tidak bisa dikontrol sehingga kalori yang digunakan menjadi maksimal yang menyebabkan pemakaian listrik menjadi besar juga. Perancangan sequenching chiller menggunakan PLC ini, bertujuan agar suhu yang dihasilkan oleh sequencing chiller stabil pada 27oC dan energy yang digunakan berkurang hingga 50%. Hasil pengujian dari perancangan bahwa setelah menggunakan PLC suhu dalam ruang dapat dikontrol stabil pada 27 derajat celcius.Dari 3 chiller yang tersedia pada mesin pendingin dengan PLC bisa dikontrol jumlah yang dipakai sehingga dapat menghemat 50% energy listrik yang digunakan.
Profesi Engineer dan Strategi Mengatasi Kecemasan Berbahasa Inggris
Authors: Wijirahayu Suciana , Irawan Rifki
Published: March 2019

One of the reasons why the participants lack speaking skill is they felt anxious when communicating in English in a real situation, especially with foreigners. There are eight participants in this research joined in house training in one of the company in Jakarta-Indonesia The research is mainly qualitative with some descriptive statistics which employed some data collection techniques: two questionnaires, interview, classroom observation, and document analysis. The data were analyzed by ways of reducing, displaying, and interpreting data.  Four participants detail expression related to their Foreign Language Anxiety (FLA) will be illustrated and discussed.  The results of the study were most of the participants experience a high level of test anxiety, the sources of anxiety coming from people’s view, preparation, procrastination, expectation, negative consequences/ negative thinking, personal problem, time pressure, format usage, students’ age, students’ familiarity with the testing condition, testing situation factors, and not mastering the skill. The participants’ coping strategies are various which are mostly cooperating.
Rancang Bangun Sistem Pengenalan Citra untuk Tingkat Kematangan Buah Pepaya California Berdasarkan Warna Berbasis
Authors: Mirani Thia , Sinduningrum Estu , Dzikrillah Ahmad Rizal
Published: March 2019

Pepaya (Carica papaya L.) merupakan komoditas buah tropika utama.  Untuk mengetahui tingkat kematangan buah pepaya California petani masih melakukan secara visual, dengan cara membelah buah pepaya. Dengan merancang teknologi ini memungkinkan mengindentifikasi kematangan buah pepaya California berdasarkan cirri warna dengan bantuan ponsel. Metode ekstraksi ciri yang digunakan dalam mengidentifikasikan adalah ekstraksi fitur warna (R, G, B), yang akan di implementasikan kedalam ponselmenggunakan sebuah aplikasi berbasis Android. Bahasa yang digunakan adalah Java. Serta menerapkan metode algoritma Min-Max sebagai metode pengambilan nilai warna RGB. Penulis menguji cobanya dengan menggunakan tingkat pencahayaan yang berbeda dan tingkat pengambilan gambar dengan zoom in, zoom out dan pengambilan gambar normal untuk mengetahui tingkat kematangan buah pepaya berdasarkan warna pada kulitnya. Penulis menguji coba kesesuaian antara hasil analisis aplikasi dengan kondisi aktual. Dari hasil pengujian, didapatkan bahwa analisis aplikasi ternyata sesuai kematangan buah dengan kondisi aktual buah pepaya California mentah, matang atau busuk.
Penjadwalan Hafalan Alquran dengan Algoritma Genetika
Authors: Alfaraby Abdul Aziz , Hilda Atiqah Meutia , Kamayani Mia
Published: March 2019

Jadwal merupakan tahapan yang paling menentukan keberhasilan suatu hafalan Alquran.  Hal ini dikarenakan jadwal adalah tahap ketergantungan antar aktivitas yang membangun secara keseluruhan. Pemecahan masalah jadwal yang baik dari suatu hafalan Alquran merupakan salah satu faktor keberhasilan dalam pelaksanaannya, dan menerapkan algoritma genetika untuk memecahkan masalah dalam jadwal  hafalan Alquran serta dapat menjadi solusi dalam menangani masalah dalam mengatur jadwal secara otomatis. Algoritma genetika merepresentasikan kandidat solusi optimasi jadwal ke dalam kromosom-kromosom secara acak, lalu dievaluasi menggunakan fungsi fitness dan seterusnya dilakukan seleksi. Metode seleksi yang digunakan dalam penelitian ini adalah metode seleksi roda roulette, kemudian dilakukan pindah silang dan mutasi. Pada setiap generasi, kromosom dievaluasi berdasarkan nilai fungsi fitness. Setelah beberapa generasi maka algoritma genetika akan menghasilkan kromosom terbaik, yang merupakan solusi optimal. Pengujian yang dilakukan meliputi pengujian blackbox. Hasil dari sistem jadwal hafalan Alquran menggunakan algoritma genetika adalah jadwal kegiatan-kegiatan dalam sebuah hafalan dalam waktu satu minggu, dan berdasarkan hasil pengujian performansi yang dilakukan sebanyak 6 kali dapat disimpulkan bahwa algoritma genetika membutuhkan waktu yang lama jika nilai iterasinya besar, karena dalam algoritma ini terdapat proses penggenerasian.
Pengaruh Gaya Lift Terhadap Sudut Serang Airfoil Naca 0013 dengan Ansys Fluent
Authors: Hidayat M. Fajri , Nofendri Yos
Published: March 2019

Dunia Kedirgantaraan di Indonesia yang semakin lesu, butuh Peneliti-peneliti bertalenta di bidang Aerodinamika agar bisa mengangkat kembali nama baik dan harga diri Bangsa. Penelitian saya kali ini bertemakan studi bidang aerodinamika dari potongan melintang sayap pesawat terbang type Airfoil NACA 0013 dengan mencari sudut serang yang tepat untuk Take Off. Tujuan Penelitian ini adalah untuk menentukan sudut serang terbaik dari Pesawat saat Take Off. Metode yang saya gunakan dengan penerapan Simulasi CFD menggunakan Software ANSYS-Fluent versi 14.5 dengan Workbench. Hasil yang di dapat dari penelitian ini akan ditabulasikan dalam tabel dan grafik hubungan antara Gaya Lift terhadap Sudut Serang. Dengan mengambil variabel sudut serang sebanyak 9 variabel yaitu 0o, 3o, 6o, 9o, 12o, 15o, 18o, 21o, dan 24o. Dari hasil Simulasi didapat Sudut Serang terbaik untuk tipe NACA 0013 adalah 21o dengan harga Gaya Lift sebesar 61,650 N.
Pengujian Kinerja Detridge Wheel sebagai Pembangkit Listrik Tenaga Air Head Sangat Rendah
Authors: Luhung Rizal Andi , Mugisidi Dan , Fikri Agus , Heriyani Oktarina
Published: March 2019

Penelitian ini bertujuan untuk mengukur kinerja kincir air tipe Detridge wheel yang menggunakan head sangat rendah sebagai tenaga penggerak. Detridge wheel pertama digunakan untuk mengukur kecepatan aliran pada irigasi sawah, seorang peneliti pernah menguji kincir air ini dengan simulasi Computational Fluid Dynamics (CFD) efisiensi maksimal yang dihasilkan adalah 60 %. Penelitian ini menggunakan material plat baja tebal 1,8 mm dan multiplek sebagai runner kincir air. Air disirkulasikan dengan variasi debit yang berbeda menggunakan pompa menuju bangunan air dan kembali lagi ke tangki penampung. Parameter yang diukur adalah putaran (rpm), gaya (N), kecepatan aliran air ( ) dan ketinggian air (m). Pada keenam variasi debit, efisiensi tertinggi dengan debit pertama yaitu 43,314 %. Daya air sebesar 1,862 watt dan daya kincir air yang dihasilkan 0,806 watt. Semakin tinggi kenaikan debit menyebabkan rugi-rugi yang terjadi juga semakin besar.
Desain Komposisi Bahan Komposit yang Optimal Berbahan Baku Utama Limbah Ampas Serat Tebu (Baggase)
Authors: Nuruddin Mochammad , Santoso Rahmat Agus , Hidayati Roziana Ainul
Published: March 2019

Bahan baku atau material komposit sebagai alternatif bahan baku non logam dipilih karena memiliki sifat ketahanan korosi yang lebih baik, karakteristik yang dapat dikontrol serta berat yang lebih ringan dan biaya produksi yang murah.  Upaya yang dilakukan melalui inovasi desain  bahan baku utama komposit yang memiliki keunggulan serta lebih aman dan ramah terhadap lingkungan. Salah satu jenis serat alam yang sangat potensial adalah ampas serat tebu (baggase). Ampas serat tebu merupakan limbah dari proses pengolahan gula yang pemanfaatannya kecil, diperkirakan sebanyak 40 % dari ampas tebu tersebut belum dimanfaatkan secara optimal. Penelitian ini bertujuan untuk desain atau rancangan komposisi bahan baku atau material level optimal komposit dari limbah ampas serat tebu sebagai serat penguat utama material komposit dengan kombinasi  alternatif  bahan baku pendamping berupa serat batang/pelepah pisang dan serat/sabut kelapa sehingga dalam penelitian  ini diistilahkan Tree in one of material komposit. Tahapan penelitian diawali dengan penerapan metode desain robust (Taguchi)  dari indentifikasi variabel penelitian hingga pelaksanaan eksperimen dengan penentuan level faktor kualitas dan ortogonal array yang sesuai serta dengan replikasi 2 kali, Adapun hasil penelitian yang diperoleh adalah desain komposisi level optimal pada eksperimen ke-4 dimana komposisi bahan baku 70%, 10%, 20%  ( Matrik + Filler) dengan  posisi struktur serat Searah, perekat yang sesuai memakai resin epoxy diperoleh rata–rata kekuatan bending sebesar  8,2404 MPa dan rata-rata kekuatan tarik sebesar 2,992748718 MPa, tentunya perlu dilakukan treatment spesifik untuk penelitian lanjutan yang lebih sempurna  agar  produksi komposit yang dihasilkan dapat ditingkatkan kualitasnya.
Pengaruh Overall Heat Loss Coefficient Terhadap Hasil Output solar still
Authors: Cahyani Regita Septia , Mugisidi Dan , Rifky Rifky , Heriyani Oktarina
Published: March 2019

Penelitian ini bertujuan untuk mengetahui pengaruh koefisien kehilangan panas keseluruhan terhadap hasil output yang terjadi pada solar still. Penelitian ini menggunakan material stainless still tebal 1,6 mm dan kaca penutup tebal 3mm dengan kemiringan terhadap alat solar still 30 ̊. Pengujian dilakukan mulai pukul 08.00 WIB sampai 17.00 WIB selama 3 hari, dengan beberapa parameter yang di ukur seperti suhu kaca bawah (Tgi), suhu air (Tw), kecepatan angin (v), intensitas radiasi matahari (I(t)s) yang terdapat dalam sistem alat solar still. Dari hasil pengujian yang dilakukan overall heat loss coefficient  tertinggi yaitu sebesar 50,7 W/m2.K.. Semakin tinggi coefficient top heat loss sangat mempengaruhi coefficient heat loss overall sehingga hasil output tidak mengalami kenaikan.
Proses Pirolisis Sampah Plastik dalam Rotary Drum Reactor dengan Variasi Laju Kenaikan Suhu
Authors: Cahyono Muhammad Sigit , Liestiono Maria Ratih Puspita , Widodo Cahyo
Published: March 2019

Sampah plastik merupakan salah satu jenis sampah yang bisa menimbulkan pencemaran lingkungan jika tidak bisa ditangani dengan baik. Salah satu metode untuk mengatasi masalah tersebut adalah dengan mengubahnya menjadi bahan bakar alternatif melalui proses pirolisis. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh laju kenaikan suhu terhadap rendemen dan kualitas produk pirolisis sampah plastik di dalam Rotary Drum Reactor. Bahan baku yang digunakan adalah sampah plastik berupa tas kresek hitam yang bersih dan kering. Bahan tersebut dimasukkan ke dalam reaktor untuk dipanaskan sampai suhu 3500C selama satu jam menggunakan steam-atomizing burner. Variabel dari penelitian ini adalah laju kenaikan suhu di dalam reaktor, yaitu 5, 10, dan 150C/menit. Hasil penelitian menunjukkan bahwa semakin tinggi laju kenaikan suhu, rendemen minyak yang dihasilkan juga semakin besar. Rendemen terbesar yaitu 46% yang dicapai pada laju kenaikan suhu 150C/menit. Hasil uji laboratorium menunjukkan bahwa karakteristik minyak hasil pirolisis mendekati sifat-sifat minyak solar, sehingga bisa dijadikan alternatif bahan bakar mesin diesel di masa depan.
The influence of endothelial hyperplasia on pseudoprogression development in patients with glioblastoma
Authors: Petrovic Marko , Ilic Rosanda , Milicevic Mihailo , Peulic Miodrag , Grujicic Danica
Published: March 2019

Introduction/Objective. Pseudoprogression represents an enlarging contrast-enhancing lesion that occurs after chemoradiation and stabilizes with time without any changes in the therapeutic procedure. This phenomenon is highly significant, because it can have influence on further therapeutic procedures; however, precise criteria for pseudoprogression diagnosis have not yet been defined. The main goal of this study is to examine the endothelial hyperplasia influence on pseudoprogression. Methods. We analyzed a group of 106 patients with glioblastoma who had undergone surgical treatment from 2010?2012, at the Clinic of Neurosurgery, Clinical Center of Serbia, who received Stupp protocol. Pre- and post-treatment imaging was evaluated using RANO criteria. Lesions that improved or stabilized were defined as pseudoprogression, and lesions that progressed were defined as true progression. Endothelial hyperplasia was identified based on the hematoxylin and eosin pathohistological examination. Results. Thirty-two (30.2%) of the patients were diagnosed with pseudoprogression. Endothelial hyperplasia was observed in 51 (48.1%) of glioblastoma tissue samples, and 28 (87.5%) of all the patients with pseudoprogression were found to have endothelial hyperplasia. The group of 51 (68.9%) patients without pseudoprogression did not show the presence of endothelial hyperplasia. Statistical analysis showed significantly higher incidence of pseudoprogression in patients with endothelial hyperplasia. (?2 = 26.269, p < 0.01) Conclusion. Taking into account that there are no precise diagnostic methods that could determine the presence of endothelial hyperplasia with certainty, it could be an indicator, as a pathohistological entity, of a higher likelihood of pseudoprogression, which could be used in everyday clinical practice. In order to reach definite conclusions, we believe it is necessary to conduct prospective controlled studies with larger sample sizes.