bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGEMBANGAN ALAT UKUR BEBAN KERJA MENTAL PERAWAT DALAM INTERAKSI ASUHAN KEPERAWATAN
Authors: Mediawati Ati Surya , Nurachmah Elly , Mansyur Muchtaruddin , Eryando Tries
Published: January 2019

ABSTRAKKetika melakukan asuhan keperawatan, perawat perlu berinteraksi dengan klien. Interaksi dapatdilaksanakan dengan baik apabila perawatannya mampu beradaptasi dengan beban kerja mentalyang dimanifestasikan ke dalam gejala fi sik, psikologis, dan perilaku yang ditampilkan. Tujuanpenelitian: mengembangkan alat ukur beban kerja mental saat berinteraksi dengan klien dalampemberian asuhan keperawatan. Metode: Penelitian menggunakan metode deskriptif analitis. Alatukur dikembangkan dengan menggunakan pendekatan interpretasi terhadap skala interval danskala ordinal yang diisi oleh 596 partisipan yang diproses melalui sebelas case processing data.Penelitian dilaksanakan di provinsi Jawa Barat, Jawa Tengah, Sumatra Barat, dan Sulawesi Selatan.Validitas dan reliabilitas variabel persepsi Teruji (p=0,996 sebelum interaksi dan p=0,993 setelahinteraksi), observasi (p=0,844 sebelum interaksi, p=0,711) orientasi (p=0,711), identifi kasi (p=0,769),eksplorasi (p=0,773), resolusi (p=0,820), setelah interaksi (p=0,772), angket klien (p=0,64). Hasil:Hasil pengujian model Con fi rmatory Factor Analysis (CFA) melalui program Lisrel menghasilkanp-value=0,150 (p>0,05) dan RMSEA=0,075 (RMSEA<0,1). Diskusi: Diperlukan dukungan regulasisebagai implikasi dalam penggunaan alat ukur. Simpulan: alat ukur ini vaild dan reliabel sebagaiinformasi diagnostik pengukuran beban kerja mental.Kata Kunci: alat ukur, beban kerja mental, interaksi.ABSTRACTNurses in providing nursing care need to interact with clients. Such interaction can be successfullyperformed if the treatment can adapt to mental workload which is manifested into physical,psychological and behavioral symptoms. Objectives: developing a mental workload instrumentwhen interacting with clients in providing nursing care. Methods: It employed a descriptive analyticmethod. The instrument was developed by employing the approach to the interpretation of scaleinterval and ordinal scale which were fi lled by 596 participants and processed through 11 caseprocessing data. The research was conducted in the provinces of West Java, Central Java, WestSumatra and South Sulawesi. Validity and reliability of the perception variables were tested (p=0.996before the interaction and p=0.993 after the interaction), observation (p=0.844 before the interaction,p=0.711), orientation (p=0.711), identifi cation (p=0.769), exploration (p=0.773), resolution (p=0.820),after the interaction (p=0.772), client questionnaire (p=0.64). Results: The results of Con fi rmatoryFactor Analysis (CFA) usingLisrel software indicated p-value=0.150 (p>0.05) and RMSEA=0.075(RMSEA <0.1). Discussion: Regulatory support is needed as an implication for the use of theinstrument. Conclusion: This instrument is valid and reliable to measure mental workload fordiagnostic information.Keywords: instrument, mental workload, interaction.
Production of biodiesel from vegetable oils and animal fats in waste water
Authors: Duong Thuy Thi Thanh , Pham Kien Trung , Nguyen Phuoc Van , Nguyen Phuong Thi Thanh
Published: January 2019

This study was performed to produce biodiesel from vegetable oils and animal fats in waste water of Park Hyatt Saigon hotel. The survey was performed to determine the optimum reaction condition for converting waste grease into biodiesel. The reaction was conducted at 60, 90 and 120 minutes; the catalyst dosage (NaOH) of 2, 3, 4, 5 and 6 g; ratio of 4:1, 5:1, 6:1, 7:1 MeOH : grease. The reaction temperature was 600C. The optimal reaction conditions were found to be 90 minutes, catalyst dosage of 4 g, ratio of 5:1 MeOH : grease. The efficient conversion achieved 80% biodiesel and 20% crude glycerin.
Evaluation of air pollutant emissions and Modeling of air quality in Saigon Port, Vietnam
Authors: Ho Bang Quoc , Vo Huong Thi Thanh , Chuanak Suwat
Published: January 2019

Saigon Port within the port system of the Vietnam Maritime sector is one the port having highest throughput and productivity in the country. The air quality in the area around the port is polluted. The aim of this study is to calculate air pollutant emissions from ocean-going vessels (OGVs), harbour craft (HC), cargo handling equipment (CHE), road vehicles and power plant within the port. Then the air emissions results are used for modelling air quality in Saigon Port. The results of air quality modelling are used to design emissions abatement strategies. The results of air emission inventories show that total emissions of all pollutants are dominated by OGVs and harbor cranes. Emissions from OGVs are mainly during hotelling due to the long times spent at berth, while harbor cranes emissions are high because of the extended usage and high power rating. The results of air quality modeling using only air emission inventories from the port as input parameter show that concentration of air pollutants is lower than the Vietnamese technical regulation on ambient air quality. Only air emissions from Saigon port don’t pollute the air surrounding area but if combined with other sources of emissions cause air pollution to the surrounding area.
Optimisation of durian peel based activated carbon preparation conditions for dye removal
Authors: Le Phung Thi Kim , Le Kien Anh
Published: January 2019

Agricultural wastes are considered to be a very important feedstock for activated carbon production as they are renewable sources and low cost materials. This study present the optimize conditions for preparation of durian peel activated carbon (DPAC) for removal of methylene blue (MB) from synthetic effluents. The effects of carbonization temperature (from 673K to 923K) and impregnation ratio (from 0.2 to 1.0) with potassium hydroxide KOH on the yield, surface area and the dye adsorbed capacity of the activated carbons were investigated. The dye removal capacity was evaluated with methylene blue. In comparison with the commercial grade carbons, the activated carbons from durian peel showed considerably higher surface area especially in the suitable temperate and impregnation ratio of activated carbon production. Methylene blue removal capacity appeared to be comparable to commercial products; it shows the potential of durian peel as a biomass source to produce adsorbents for waste water treatment and other application. Optimize condition for preparation of DPAC determined by using response surface methodology was at temperature 760 K and IR 1.0 which resulted the yield (51%), surface area (786 m2/g), and MB removal (172 mg/g).
Some methods on flood inudation mappings for Long An province under climate change and sea level rise
Authors: Nguyen Quan Hong
Published: January 2019

Mapping flood inundation can be done by different methods, of which GIS analysis and flood modeling can be considered as the most popular ones. The modeling approach often requires more data but produce more detail results comparing to the GIS. Based on the assessment of current applied methods for building flood inundation map in the Mekong delta provinces in general and Long An in particular as well as based on some recent results of using GIS, 1 D ISIS model and 1-2D Mike Flood model applied in Long An province, the author show advantages as well as disadvantages of each methods and especially the results’ confidence. As the result, the author presents some challenges in mapping flood inundation maps under climate change and sea level rise. Integrating hydraulic construction (e.g. dyke, sluice, storage areas) and adaptation measures in the current and future in the analysis are typical challenges.
Research solutions technical - water technology to reduce the water loss for water supply system of Hochiminh city
Authors: Vo Tuan Anh
Published: January 2019

The HCMC water supply system have built from the French Colonial period, and developed without planning and systematic study during the war time. In the beginning, this system used for the small town Saigon- Gia Dinh. Today, the capacity of water supply system is 1,85 million m3/day and will increase up to 2,5 million in next few year and up to 4-5 million m3/day according with the HCMC water supply system planning approved by Government. The climate change issues, salt water lever increase, polution... affect directly into the raw water resource of the existing and future water treatment plant. Beside that, the big size water supply transmission pipe line and the distribution water supply system of 06 hydrolique zone in HCMC damaged according with time : bad quality and No- update information of pipe system… It bring the real water loss level in HCMC so high up to 40% - 50% .The acceptable technologies & techniques solution to find the leak, optimal management for the water supply system to reduce the water loss is extremely essential, to support the clean water resources for the sustainable development of the HCM City.
The full cost of the water supply services and reasonable levels of cost recovery case study in HoChiMinh city
Authors: Nguyen Hung Thanh , Lam Triet Minh
Published: January 2019

The determination of the full cost of water supply services and the levels of its reasonable cost recovery is very important in the policy decisions related to water supply services and water environmental protection in the face of pressures of water shortage and pollution are increasing. This paper introduces a general framework for the analysis of the full cost of the water supply services and it has applied to analyze, evaluate for a case study in Ho Chi Minh City. This analysis framework focused on three basic components that make up the full cost of water supply services including: (i) the full cost of providing water (financial costs), (ii) opportunity cost of using water (resource cost), and (iii) the environmental cost (environmental and economic damages caused by water sources pollution). On the basis of the evaluated full cost, the levels and mechanism of reasonable cost recovery also be discussed towards three pillars of sustainable development related to water: financial sustainability of water supply services, sustainability in terms of the natural environment, and social adaptability for changes in the water prices.
Evaluation approaches of sludge ultrasonic pretreatment efficiency: a review
Authors: Le Tuan Ngoc , Pham Chau Ngoc
Published: January 2019

Ultrasonic irradiation (US) is a feasible and promising mechanical disruption technique for sludge disintegration, biodegradability acceleration, and anaerobic digestion enhancement. It is clear that many processing factors significantly affect cavitation and consequently the efficiency of sludge pretreatment. Therefore, assessment, comparison, and selection of optimal ultrasonic conditions for actual application of sludge pretreatment are sorely necessary. The objective of this work is to present an extensive review of evaluation approaches of sludge ultrasonic pretreatment efficiency based on physical, chemical, and biological properties of sludge.
Enhancing efficiency of biogas collection from industrial organic sludge
Authors: Nguyen Phuong Thi Thanh , Nguyen Phuoc Van
Published: January 2019

Industrial organic sludge is the concern of society and government levels since this kind of sludge will lead to the pollution of groundwater, surface water, air and the invasion of the food chain, increasing the disease and causing the bad effects on health without collecting and treating thoroughly. For high organic pollutants in sludge, appropriate treatment technology to recover biogas, supply energy for demand of production and living, is one of the current and priority solutions. Research contents in this study were application of pretreatment by hydrolysis process and anaerobic sequencing batch reactor (ASBR) to enhance biogas recovery. The obtained experimental results by hydrolysis through the alkalization process demonstrated that COD removal efficiency reached 62%, collected methane gas increased 4.9 times (360ml/L) compared to confronting sample (directly digestion, without hydrolyzed phase), at pH of 12, for 12 hours of hydrolysis time and after 20 digestion days at room temperature (30 -350C). Research results on anaerobic digestion reactor at organic loading rate of 1,6 kg VS/m3.day showed that COD and VS removal effiencies can reach 61.59 – 62.24, 52.33 – 54.26%, respectively for 20 days. The methane yield obtained 0.343 – 0.402 m3CH4/kgVS (corresponding to 0.523 – 0.628 m3CH4/kg sludge).
Cloning and expression of recombinant human leptin in Escherichia coli
Authors: Le Xuan Mai Huong , Le To Dinh , Dang Thao Thi Phuong , Tran Thuoc Linh
Published: January 2019

Leptin, a peptide hormone, is produced by mature adipocytes and functions primarily in the hypothalamus to reduce food intake and body weight. Recombinant h-leptin has been shown to be effective in obesity treatment. To overexpression of recombinant human leptin in Escherichia coli, the human leptin gene (hob gene) was cloned into the vector pET-28a. When analysis expression of human leptin in E. coli BL21(DE3) strain, it was found that recombinant vector pET-hob expressed h-leptinproteins in cytoplasm, and mainly as insoluble inclusion bodies. This result will be the premise for researching to produce recombinant human leptin protein.
Immunogenicity in poultry of in silico predicted - continuous B-cell epitopes from influenza virus H5N1
Authors: Tran Kim Thi Hong , Tran Thuoc Linh
Published: January 2019

In order to develop vaccine with stable efficiency against easily transforming virus such as influenza H5N1 virus, bioinformatic tools were used to predict conserved epitopes from viral antigens to be used as materials for the development of polyvalent vaccine against this virus. Using this approach, we have successfully predicted B-cell continuous and discontinuous epitopes on conserved domains of HA and NA antigens from H5N1 influenza A virus. To confirm the immunogenicity of these epitopes, genetic manipulating techniques have been employed, to prepare the recombinant epitopes in E. coli as a fusion form with H:1,2 flagellin antigen from Salmonella Typhimurium and with glutathione S-transferase. These recombinant antigens have been collected, purified and used for animal immunizing. This study shows the results in specific immunogenicity of recombinant B-cell epitopes continuous in chickens. Using HI test (Hemagglutination Inhibition Test), we could successfully prove that the antiserum from both of chicken groups immunized with GST-H:1,2-HeBc and GST-H:1,2-NeBc had specific antibodies could inhibit the agglutination of antigens derived from an influenza H5N1 virus strain isolated from infected chickens in Vietnam. The HI titer of anti-GST-H:1,2-NeBc antibodies was 113,00, that is 1,19 times higher than the HI titer of anti-GST-H:1,2-HeBc antibodies (95,00), while the HI titer of antibodies from chickens immunized with commercial inactivated vaccine H5N1 reached 291,58.
Physiological basis of effective controlling Torpedo grass (Panicum repens L.)
Authors: Nguyen Sanh Du
Published: January 2019

Torpedo grass (Panicum repens L.) is a C4 plant species, present on different soil types. The rhizome system and tubers of grass well developed, although flowering but not yet recorded the presence of seeds and seedlings (Yêu cầu tác giả viết lại toàn bộ câu này, không thể sửa được. Lưu ý câu phải có động từ chính). Tuber has high drought tolerance. Regenerative ability of the grass decreases with water content of the tuber. Tuber inability to regenerate shoots when it has water less than 30% of water at first. Repeatedly cut grass will take the tuber reserve depletion, not sufficient to provide for the regeneration bud sprouts. Coordinate disposal of mowing and using systemic herbicides will lead to better results. 6-8 weeks after cutting, the grass grow well with multiple shoots, spraying glyphosate 480 SL or glyphosate trimethyl sulphonium (GTS) at doses of 6-8 l / ha, mixed with urea at concentrations from 1% to 1.5%. This way helps prevent the emergence of shoots from rhizomes and tubers.
Investigation of beta-carotene production from microalgae Dunaliella isolated in Vietnam
Authors: Huynh Hung Hiep , Nguyen Lan Thi My , Le Phuoc Thi My , Pham Ho Thanh
Published: January 2019

Beta-carotene is known as one of nature’s most powerful antioxidants. It is also a major pro-vitamin A nutrient, and simulative effects on the immune system. Nowadays, the microalga Dunaliella is the best commercial source of natural β-carotene since it has a mixture composed mainly of 9-cis isomer which is evident is a better antioxidant than the all-trans isomer. In addition, synthetic β-carotene only contains the all-trans isomer, natural (all-trans) beta-carotene is found together with other carotenoids. In this study, we chose the microalga Dunaliella sp. which is isolated at salter in Vietnam since it could grow more easily in this climate. Therefore, it has a great potential for large-scale culture in Vietnam coast. The research aims at investigating the optimization of cultural conditions and stresses depth for cell growth and β-carotene production of this alga. The obtained results showed that the highest cell density was attained at 2M salt concentration with 2.7 ×106 cell/ml and productivity of dry biomass was 0.321g/l. Furthermore, β-carotene content increased to 9% of dry biomass under high salinities (NaCl 3M) or nitrogen starvation of cultural condition.
Collection of some microbial consortia producing hydrogen from anaerobic wastes
Authors: Pham Hanh Thi Kim , To Anh Thi Ngoc , Nguyen Anh Duong Tam
Published: January 2019

The preparation of hydrogen-producing microbial consortia from three anaerobic digested sludges were carried out by four different pretreatment methods (heat – shock, acid, base and aeration treatment) as well as untreatment. The obtained microbial seeds have been estimated for their stability in fermentative hydrogen production by three consecutive batch fermentations under the same conditions of pH 6.5, room temperature and cultivation time and also investigated the H2 fermentation from different concentrations of glucose and xylose. Three microbial seeds have the most effective H2 production at 5 g/l of glucose or xylose after 48 h cultivation time. The sewage sludge pretreated at 80oC for 30 minutes shows the hydrogen yield of 1.27 mol/mol glucose and 0.82 mol/mol xylose. The sludge in the biogas tank pretreated at 60oC for 30 minutes has the hydrogen yield of 1.27 mol/mol glucose and 0.71 mol/mol xylose. The sludge of the Hoa Binh waste treatment plant pretreated at 60oC for 30 minutes presents the hydrogen yield of 1.31 mol/mol glucose and 0.66 mol/mol xylose.
Effect of high light, heat and carbon dioxide deficiency on photoinhibition of Mimosa pigra L. leaves
Authors: Do Kiet Thuong , Tran Triet , Bui Viet Trang , J. Givnish Thomas
Published: January 2019

High light (2000 μmol/m²/s), heat (40 oC), and CO2 deficiency were used to investigate photoinhibition of Mimosa pigra L. leaves. The results showed that high light caused the increase of stomatal conductance, CO2 fixation, O2 emission, non-photochemical (qN) and electron transport rate (ETR) of Mimosa pigra L. leaves. Leaves Fv/Fm ratio (Demonstrates the ability of PSII to perform photochemistry) slightly decreased under high light and recovered in the dark condition. Heat did not affect on stomatal conductance, CO2 fixation, qN, ETR and Fv/Fm but reduced O2 emission. CO2 deficiency stimulated the increase of stomatal conductance and qN but inhibited CO2 fixation, ETR and decreased Fv/Fm. High light (từ 1600 μmol/m²/s) and heat (từ 39 oC) in nature together caused strong O2 emission from Mimosa pigra L. leaves.
Transformation of callus sugarcane (Saccharum officinarum L.) using Agrobacterium tumefaciens – Mediated method and regeneration of transgenic shoot
Authors: Tran Ha Van , Cung Phuong Hoang Phi , Bui Le Van
Published: January 2019

Sugarcane (Saccharum officinarum L.) is a major industrial crop in the world. The creation of transgenic sugacane varieties contributed to overcome the disadvantages of traditional farming methods. Immature cutting cane stems after 10 days of putting on MS medium (Murashige and Skoog) supplemented 2,4-dichlorophenoxyacetic acid (2,4-D) 3 mg/L triggered the highest rate of explants inducing callus (91.11%). Calli were cultured on MS medium supplemented 6- Benzyladenin (BA) with concentrations of 0, 0.5, 1.0, 1.5, 2.0, 2.5 mg/L for inducing shoot. All six concentrations of BA could induce shoot, but the concentration of BA 1 mg/L was the most suitable. The 4-to-5-week old calli were introduced desired gene by using Agrobacterium tumefaciens, which was affected by acetosyringone concentration, inoculation and co-culture time. Consequently, transformation with acetosyringone 100 μM or 150 μM could be successful and regenerate transgenic shoots with assumed rate 25%.
Cultural exchange in nambo and its role in the development of Vietnam culture
Authors: Tran Them Ngoc
Published: January 2019

The paper begins with the addition of some fundamental concepts used as a theoretical basis for the study of cultural exchanges such as the level of exchanges (strong / weak), the conditions for the openness level of a culture, the power structure of a culture (material power, mental power), etc. Together with the characteristics of the subject, the time and space of the Nambo culture, factual basis is the strength and characteristics of cultural exchanges of the three regions (of Vietnam). In the context of the period of cultural transition from Vietnam’s rural culture to urban culture, from agricultural culture to industrial culture, the Nambo culture has quite a few advantages. Cultural exchange in Nambo helps develop physical strength, especially in the field of economic culture and traffic culture; cultural exchange in Nambo also helps develop mental strength in the field of organizational culture, educational culture, communicative culture, behaving culture, etc. For some aspects, the Nambo culture can be considered the intermediary chain link between Vietnamese traditional culture and Western culture. In this sense, the Nambo culture and cultural exchange in Nambo have played the role of a key factor in promoting and enhancing the efficiency of the development and modernization of Vietnam's traditional culture.
Southern of Vietnam in the context of international integration era
Authors: Vo Sen Van , Tran Tien Nam
Published: January 2019

The Southern part of the country is located directly in the Mekong sub-region with 3-side sea-contact. The location of the area can be considered the “heartland” of Southeast Asia which is very convenient for international trading activities of different countries, especially those from ASEAN including main land and maritime countries. The potentials of the area mentioned above have shown that the Southern part of Vietnam embraces strong geographical, biological and human resources as important conditions for the development of the country. The Southern part has long become great commodity economy area of the country which strongly focusing on exporting as well as contacting and integrating internationally at very early era. In the first decade of the 21st century, the Southern part of Vietnam still plays an important role in the context of international integration and development of the country in the era of industrializing and modernizing. This paper focuses on describing the process of integration of the Southern part of Vietnam in the context of industrialization and modernization era in Vietnam. Consequently, the paper concludes particular traits and foreseen issues regarding the development of the Southern part of Vietnam. Moreover, the role and contribution of this Southern part will be clarified during the common process of industrialization, modernization nation-wide in the new era.
Some comments on national policy of the republic of Vietnam under control of ngo dinh diem (1954 – 1963) for ethnic group in central highlands
Authors: Nguyen Tiep Van
Published: January 2019

Due to the Highlands’ strategic location in terms of politics and military, after the enthronement, President Ngo Dinh Diem implemented the policy of nationalization to annex Highlands into the Territory of Republic of Vietnam. Ngo Dinh Diem Government carried out wrong policies regarding economy, depriving highland villages of the collective ownership of the land mass to perform settled agriculture and habitation, to build up strategic hamlets, all resulting in the unstabibility, disturbance and poverty of the minority communities. The government operated the policy of cultural assimilation in all aspects such as law, culture, education, etc.; at the same time, born the discrimination against public servants, officials, military officers in the Highlands leading to the conflict between the Highlands people, the government and even the Kinh people. The Department of Highlands Affairs, as an advisory body and national policy enforcer, didn’t fulfill its duty, but acting for formality. The consequences of the misguided policies of the Ngo Dinh Diem government was the mail reason leading to the struggling movement of Highlands peoples, making the Highlands’ issues of security and politics all the more unstable.
Evolution of Australian policy to Vietnam
Authors: Do Hanh Thi
Published: January 2019

The relationship between Vietnam and Australia more and more obviously reveals the beneficiality stemming from the demands and capabilities of the two countries. Both positioned in the valley of the Pacific Ocean, the potential and growth of their relationship remains strong in a world of increasingly global and regional reunion and linkage. Optimizing the beneficiality and most effectively exploiting the potential of both countries in their relationship depend on many factors among which total scientific acknowledgement and appreciation of historical process of the relationship are extremely necessary. When does it originate the Australian policy to Vietnam? Which historical epics has it undergone? What is its evolutionary process? And the like? The answers to these questions are the main contents of this paper. The Vietnamese policy to Australia must be set up on the foundation of proper appreciation of this country’s policy to Vietnam and of total perception on the position of Vietnam toward it, on Vietnam’s benefits and exploiting methods in the relationship with this biggest country in Southern Pacific Ocean, etc.
Law of the state board of management of documents during the innovation in Viet Nam (1986 - 2010)
Authors: Do Hoc Van
Published: January 2019

State to improve the system of management, we must first build the full legal provisions on the issuance of documents. On the basis of the resurrection of the legislative process in writing issued by Vietnam for more than 20 years of reform (1986-2010), showing the contents: summary results, evaluate the results, advantages achieved; limitations and shortcomings as well as the experience gained from over 20 years of practical legislation on issuing documents in Vietnam, the specific proposals contribute to building legislation documents issued in the context of state agencies are authorized construction bill issued legal documents.
Con Dao island through the eyes of Saigon ‘s press before 1975
Authors: Duong Linh Kieu
Published: January 2019

For historians, the media is an important historical source. Con Dao is a special province of Vietnam. The paper presents an approach to Con Dao through historical sources of the Saigon press before 1975 to have a more comprehensive view. Through the content as the name implies, through natural, economic, social and cultural conditions, and potential development evaluation, the original intentions of the government of The Republic of Saigon on prison issues and on the terror cannot be changed. Through a number of important events such as the return of prisoners of war from Con Dao in 1973, etc. the author aims to add a view and wish to confirm the value of historical sources of media while approaching and presenting a problem of history, and so on.
To be successful in developing new products - a perspective from the project of manufacturing enterprises in HCMC
Authors: Bui Hung Nguyen , Le Luong Phuoc , Tran Hanh Thi Hong , Nguyen Dang Thi Hong
Published: January 2019

New product development (NPD) is the major driver of profitability, maintains competitive advantage and ensures the survival of companies. Previous studies showed that a high failure rate was found in the projects of new product development, especially in the consumer market. Thus, this study aims at identifying the success factors of new product development projects at the manufacturing companies in Ho Chi Minh City. In accordance with this purpose, a research model is proposed for this study including four success factors: Nature of product, Project activities, Characteristics of market, and Corporate skills and resources. Total 400 questionnaires were sent to respondents who are project managers at the manufacturing companies, and then 123 feed-backs were considered qualified for the data analysis, with the response rate of 30.75 %. The results of this study show that the characteristics of market have the most positive impact on the success of projects in new product development. The nature of products as well as the corporate skills and resources are the two factors which are also found to have positive impacts on the success of projects in new product development. Meanwhile, the project activities also impose positive impacts on the success of the projects; yet, the impact level is less than the other three factors.
Highly attractive models in advertising: What causes negative affect?
Authors: Nguyen Sinh Hoang
Published: January 2019

Highly attractive models (HAMs) have been popularly used in advertising to exert psychological impacts on the message receiver in the hope of increasing advertisement’s effectiveness. The marketing literature is replete with evidence of the positive effects of using HAMs. However, support for their effectiveness is somewhat conflicted. The research attempts to add to the body of general knowledge, specifically through exploring the impact of individual difference variables (model characteristics, product types, comparison motives and culture) on negative effects. This study also investigates whether advertising skepticism determined by culture has an impact on negative effects as a result of a HAM comparison. The methodology uses a 3 [beauty types] x 2 [product types] x 2 [comparison motives] between-subjects experimental design. Respondents for the main study are female students across cultures from international programs and universities in Vietnam. The results supported all hypotheses; except product types shown having no impact on negative effects. The research also confirmed there are interrelationships between culture and skepticism. These findings have implications regarding the potentially negative influence of advertising including HAMs for practitioners, academics and public policy makers.
Development of MBA program-service quality measurement scale
Authors: Nguyen Tho Xuan , Tran Loan Thi Kim
Published: January 2019

The purpose of this study is to develop the education quality measurement scale of Master of Business Administration (MBA) program in Vietnam. Cronbach’s Alpha, Exploring Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) were used to test the model with the support of SPSS and AMOS. The result of this study on the sample of 307 MBA students of Public and Private Universities in Ho Chi Minh City and neighbouring provinces indicates that MBA program education quality measurement scale includes five components: (1) Perceived program quality, (2) Perceived quality of life, (3) Perceived quality of lecturing faculty, (4) Perceived quality of academic facilities, and (5) Perceived quality of outcome.
Permanent Court of Arbitration – La Haye International Court of Justice and the Settlement of East Sea Sovereignty Dispute of Vietnam
Authors: Banh Tuan Quoc
Published: January 2019

On the basis of summarizing the formation and development of the permanent Court of Arbitration – La Haye International Court of Justice in The Hague, Netherlands, the author did some analyses to clarify the Court's role as one of the international bodies regarding dispute settlement which was established the earliest in the history of the modern world. In addition, the in-depth analysis of the issues to which Vietnam pays attention such as order, settlement procedures, legal evidence for which Vietnam should prepare, the advantages and limitations of the permanent Court of Arbitration – the Hague, etc. generalized the fundamental aspects to serve as a basis for reference in selection of international tribunals to settle East Sea sovereignty dispute of Viet Nam.
Vietnam’s macroeconomic instability from monetary policy perpecstive
Authors: Ha Dao Thi Thieu , Pham Trinh Thi Tuyet
Published: January 2019

Macroeconomic instability Indices of Vietnam shows that Viet Nam actually falls in macroeconomic instability. In addition to the effect of external factors such as increased capital inflow fluctuation and global economic crisis, easy monetary and fiscal policy also lead to estate and stock price boom and finally expose Vietnam economy to instability. Among them, monetary policy is one of the main causes leading to this situation because of frequency change in policy, inconsistency of inflation targeting, lack of long-term policies and administrative measures. This paper also points out some policy recommendations for effectively controlling the instability.
Dynamic effects of discrete events of a service experience on global satisfaction across two instances: “hot” and “cold”
Authors: Vo Thuy Thi Ngoc
Published: January 2019

The article demonstrastes how different moments (events) within a multiple service moments have impact to the global customer satisfaction both when measured immediately after the experience (“hot”) vs. after an extended period of time (3 weeks) (“cold”). A real life festival was organized thrice to expose different independent group of participants (n = 593). The results show that the influence of different moments of service experience on overall customer satisfaction depends on their temporal position (beginning, mid, end) & evaluation timing of customer satisfaction. The study provides insights to managers about how to manage different moments in a service experience & when to measure the overall customer satisfaction. The research also shows a framework that demonstrates the link between memorization & customer satisfaction.
Short-Term Model-Based Production Optimization for a Gas Field in North Africa
Authors: Hoffmann Arnaud
Published: January 2019

This paper presents a model-based optimization solution suitable for short-term production optimization of large gas fields with wells producing into a common surface network into a shared gas treatment plant. The proposed methodology is applied to a field consisting of one dry gas reservoir with a CO2 content of 7.3% and one wet gas reservoir with a CO2 content of 2.8% and initial CGR of 15 stb/MMscf. 23 wells are producing, and all gas production is processed in a common gas treatment plant where condensates and CO2 are extracted from the reservoir gas. The final sales gas must honor compositional constraints (CO2 content and heating value). The proposed solution consists of a bi-level optimization algorithm. A Mixed Integer Linear Programming (MILP) formulation of the optimization problem is solved, assuming some key parameters in the gas plant to be constant. Hydraulic performances of the system, approximated using SOS2 piecewise linear models, and condensates and CO2 extraction, captured using simplified models, are included in the MILP. After solving the MILP, the values of the key parameters are calculated using a full simulation model of the gas plant and the new values are substituted in the MILP input data. This iterative procedure continues until convergence is achieved. Results show that the proposed methodology can find the optimum choke openings for all wells to maximize the total gas rate while honoring numerous surface constraints. The solution runs in 30 sec. and an average of 3-4 iterations is needed to achieve convergence. It is therefore a suitable solution for short-term production optimization and daily operations.
New Implementation of Residual Power Series for Solving Fuzzy Fractional Riccati Equation
Authors: Alshorman Moath Ali , Zamri Nurnadiah , Ali Mohammed , Albzeirat Asia Khalaf
Published: January 2019

This paper reveals a computational method using a Residual Power Series Method (RPSM) for the solution of fuzzy fractional riccati equation under caputo fractional differentiability. An analytical solution of fuzzy fractional riccati equation is obtained as a convergent fractional power series. The procedure produces solutions of high accuracy, and some illustrative examples are solved with a different value of orders to show the efficiency of the RPSM.
Model Reduction of Structured Dynamical Systems by Projecting onto the Dominant Eigenspace of the Gramians
Authors: Hasan Shazzad , Uddin M. Monir
Published: January 2019

This paper studies the structure preserving (second-order to second-order) model order reduction of second-order systems applying the projection onto the dominant eigenspace of the Gramians of the systems. The projectors which create the reduced order model are generated cheaply from the low-rank Gramian factors. The low-rank Gramian factors are computed efficiently by solving the corresponding Lyapunov equations of the system using the rational Krylov subspace method. The efficiency of the theoretical results are then illustrated by numerical experiments.
Serangan Karat Daun Kopi (Hemileia vastatrix B et Br) pada Tanaman Kopi Arabika di Perkebunan Rakyat Kabupaten Mandailing Natal Sumatera Utara
Authors: Siska Riza Kusuma Widia , Lubis Lahmuddin , Lisnawati Lisnawati
Published: January 2019

Kabupaten Mandailing Natal merupakan daerah penghasil kopi di Sumatera Utara. Salah satu factor pembatas produksi kopi di kabupaten ini adalah adanya serangan penyakit karat daun yang disebabkan oleh Hemileia vastatrix. Namun informasi sebaran dan keparahan penyakit karat daun kopi di kabupaten ini belum ada.Padaha linformasi ini diperlukan untuk menentukan strategi pengendalian yang tepat. Penelitian ini bertujuan untuk mengetahui keparahan penyakit dan pemetaan sebaranpenyakit karat daun kopi pada perkebunan kopi rakyat di Kabupaten Mandailing Natal. Penelitian dilaksanakan dengan metode purposive random sampling (PRS) di tiga kecamatan masing-masing Kecamatan Pakantan, Puncak Sorik Marapi dan Ulu Pungkut dengan lokasi geografis 0° 10° – 1° 50° LU dan 98° 50° – 100° 10° BT dengan ketinggian tempatantara 861-1353 meter diatas permukaan laut. Hasil penelitian menunjukkan penyakit karat daun kopi telah tersebar pada letak geografis 0°10°-1°50°LU dan 98°50°-100°10°BT dengan keparahan penyakit karat daun kopi tertinggi yaitu 45% terdapat di Desa Huta Namale, Kecamatan Puncak Sorik Marapi, sebaliknya keparahan penyakit karat daun kopi yang terendah terdapatdi Desa Huta Julu, Kecamatan Pakantan yaitu sebesar1%. Faktor suhu, ketinggian tempat dan jarak tanam berkorelasi sangat rendah terhadap tingkat kejadian dan keparahan penyakit karat daun kopi.

Mandailing Natal Regency is a coffee-producing area in North Sumatra. One of the limiting factors for coffee production in this district is the attack of coffee leaf rust disease caused by Hemileia vastatrix. The information on the distribution and severity of coffee leaf rust disease in this district is needed to determine its control strategy. This study aims to determine the severity of the disease and the mapping of the spread of coffee leaf rust disease on people's coffee plantations in Mandailing Natal District. The study was carried out by purposive random sampling (PRS) method in three sub-districts of Pakantan Subdistrict, Sorik Marapi and Ulu Pungkut Peak with a geographical location of 0 ° 10 ° - 1 ° 50 ° N and 98 ° 50 ° - 100 ° 10 ° with the altitude between 861-1353 meters above sea level. The results showed that the coffee leaf rust disease was spread over a geographical location of 0 ° 10 ° -1 ° 50 ° N and 98 ° 50 ° -100 ° 10 ° East with the highest severity of coffee leaf rust disease, 45% in Huta Namale Village, District Sorik Marapi Peak, on the contrary the lowest severity of coffee leaf rust disease is in Huta Julu Village, Pakantan District, which is equal to 1%. Temperature, altitude, and spacing factors are very low correlated with the incidence and severity of coffee leaf rust disease.
Potensi Berbagai Tanaman Sebagai Moluskisida Nabati untuk Mengendalikan Keong Mas Pomacea canaliculata Lamarck (Mollusca: Ampullariidae) pada Tanaman Padi di Rumah Kaca
Authors: Harahap Parlaungan , Oemry Syahrial , Lisnawati Lisnawati
Published: January 2019

Keong mas (Pomacea canaliculata Lamarck) merupakan salah satu hama penting pada tanaman padi yang sampai saat ini belum dapat dikendalikan dengan baik. Pengendalian dengan moluskisida kimia meninggalkan residu pada lingkungan. Oleh karena itu perlu dicari alternatif pengendalian yang ramah lingkungan seperti pengendalian biologi. Penelitian ini bertujuan untuk mendapatkan tanaman yang berpotensi sebagai moluskisida nabati yang dapat digunakan untuk mengendalikan keong mas pada tanaman padi di rumah kaca. Penelitian ini dilaksanakan pada bulan April sampai Juni 2016 di Rumah Kaca Fakultas Pertanian Universitas Sumatera Utara Medan. Metode yang digunakan adalah rancangan acak lengkap non faktorial dengan 6 perlakuan dan 4 ulangan yaitu keong mas (kontrol), serbuk pinang, serbuk tembakau, serbuk sirsak, serbuk mimba, dan moluskisida fentin asetat 60%. Hasil penelitian menunjukkan serbuk pinang dan serbuk tembakau efektif mengendalikan keong mas dengan persentase mortalitas 100% pada 3 sampai 4 hari setelah aplikasi dan mampu mencegah kerusakan rumpun tanaman padi. Kedua tanaman ini berpotensi sebagai moluskisida nabati untuk mengendalikan keong mas.

Golden Snail (Pomacea canaliculata Lamarck) is one of the most important pests in rice fields which until now has not been properly controlled. Control with chemical molluscicides leaves a residue in the environment. Therefore it is necessary to look for the environmental friendly alternative controls such as biological control. This study aims to obtain the plants that have potential as phyto-molluscicides that can be used to control golden snails on rice fields in greenhouses. The method used was a completely non-factorial randomized design with 6 treatments and 4 replications such as golden snails (control), areca powder, tobacco powder, soursop powder, neem powder, and molluscicide fentin acetate 60%. The results showed that areca powder and tobacco powder effectively controlled golden snails with a percentage of 100% mortality 3 to 4 days after application and were able to prevent damage to clumps of rice fields. Both of these plants have the potential to become phyto-molluscicides to control golden snails.
Diversitas Genetik Populasi Tumbuhan Andaliman (Zanthoxylum acanthopodium DC.) Sumatera Utara Berbasis Molekuler
Authors: Putri Lollie Agustina P , Sinaga Ayu O.Y. , Sembiring Indri M S , Setiado Hot , Sinaga Ann , Bangun M K
Published: January 2019

Andaliman adalah tumbuhan yang khas dijumpai di Sumatera Utara dan hanya dikenal untuk masakan Batak serta tumbuh secara liar. Saat ini dikhawatirkan akan menjadi punah karena mengalami penurunan jumlah individu (tidak ada upaya membudidayakan). Diversitas genetik suatu tumbuhan sangat penting karena akan mempengaruhi eksistensinya di alam dan diperlukan untuk program pemuliaan tanaman. Tujuan penelitian ini untuk mengklarifikasi keragaman genetik populasi andaliman Sumatera Utara. Sebanyak 30 aksesi andaliman dari berbagai ketinggian yang digunakan berasal dari 3 populasi yaitu dari Kabupaten Dairi, Tanah Karo dan Simalungun. Analisis molekuler RAPD dilakukan dengan menggunakan 10 primer acak. Kesepuluh primer tersebut menghasilkan 50 pola pita DNA, dengan tingkat polimorfisme mencapai 90 %. Selanjutnya koefisien keragaman genetik dan dendogram filogenetik diperoleh menggunakan software Darwin 6.0 dan GenAlEx 6.502. Hasil ini menunjukkan bahwa 30 aksesi andaliman tersebut dikelompokkan menjadi tiga kelompok. Dalam setiap kelompok terdapat aksesi andaliman yang berasal dari tiga kabupaten tersebut dan dari ketinggian yang berbeda, artinya setiap aksesi andaliman tidak mengelompok berdasarkan daerah dan ketinggian tempatnya. Hasil penelitian ini menunjukkan bahwa 30 aksesi dari tiga lokasi menunjukkan keragaman genetik yang tinggi.

Andaliman is a typical plant found in North Sumatra and is known for Batak cuisine and grows wildly. At present, it is feared that it will become extinct due to a decline in the number of individuals (there is no effort to cultivate). The genetic diversity of a plant is very important because it will affect its existence in nature and is needed for plant breeding programs. This study aims to clarify the genetic diversity of the North Sumatra andaliman population. A total of 30 andaliman accessions from various heights used came from 3 populations, such as from Dairi District, Tanah Karo, and Simalungun. RAPD molecular analysis was carried out using 10 random primers. The ten primary produce 50 DNA banding patterns, with a level of polymorphism reaching 90%. Furthermore, the genetic diversity coefficient and phylogenetic dendogram were obtained using software of Darwin 6.0 and GenAlEx 6.502. These results indicate that 30 andaliman accessions are grouped into three groups. In each group there are Andaliman accessions originating from the three districts and from different heights, meaning that each of Andaliman's accessions does not group based on the area and height of the place. The results of this study indicate that 30 accessions from three locations showed high genetic diversity.
Distribusi Kerapatan dan Kurva Stress-Strain pada Batang Kelapa Sawit
Authors: Hartono Rudi , Erwinsyah Erwinsyah
Published: January 2019

The improvement quality of oil palm trunk could be done by compression. As based on to determining of compressing level, it was need to study the density distribution and stress-strain curve of oil palm wood. The three of oil palm trunk at 23 years old were cut. The specimen for density distribution was taken from 1 m, 3 m and 5 m of height of oil palm wood with dimension 2 cm x 2 cm x 2 cm. The interval of it was 2 cm from the outer on the left to the right side. Then the specimen for stress-strain curve was taken from 1 m of height with interval of 2 cm from the outer to center of trunk. These specimens were taken at water saturated conditions. The result showed that density of oil palm wood was around 0.19-0.43 g/cm 3 . The density distribution at outer side was high, then decreasing toward the center of trunk. The compressing level increased from the outer side to the center of oil palm trunk. In the outer side of oil palm trunk can be compressing until 58% and the center side can be compressed until 71%.