bluuebunny/crossref_metadata_2025 huggingface dataset:
The Reform of Teaching Management Mode Based on Artificial Intelligence in the Era of Big Data
Authors: Diao Shanhui
Published: June 2020

To integrate AI into teaching management can optimize teaching tools, improve teaching efficiency, and ultimately improve teaching quality, so as to cultivate more excellent talents in line with market demand. The purpose of this paper is to study the reform of teaching management mode based on artificial intelligence in the era of big data. After understanding the characteristics of teaching management in the era of big data, this paper studies the reform of management mode of intelligent teaching and intelligent learning. Taking a comprehensive university as the research sample, this paper discusses the impact of MOOC on university teaching management through questionnaire survey and focus interview, and puts forward new ideas on how to better adapt to the development of education in the new era. The results show that the number of dissatisfied students is generally higher than the number of satisfied students in the freedom of major choice, curriculum choice, teacher choice and learning style choice. Only 16.09% of the students think that they have a high degree of freedom in these aspects. MOOC relies on advanced information technology to form a vivid information collection, which can help the management of college students change from unified management to personalized management.
Effect of Cam Angular Velocity on Working Efficiency of Fuel Engine
Authors: Wang Xuehui , Wang Tao , He Xiulan , Ma Zhihong
Published: June 2020

The intermittent working process of fuel entry and injection will cause the pressure in the high-pressure fuel pipe to change, causing deviations in the amount of injected fuel, which will affect the engine’s operating efficiency. Taking a high pressure oil pump system as an example, the feasibility of using constant pressure to improve the working efficiency of the high pressure fuel system is studied. First, a series of simplified assumptions are made for the model. Secondly, use MATLAB software to make cam mechanism diagram. A cam angular velocity model based on pressure stability was established using the fuel quality of one injection of the injector and the fuel quality of one cam rotation. Calculate the number of times the cam needs to rotate to get the time that the cam needs to rotate once, so as to determine the high stability of the cam. The angular velocity required for tubing pressure was obtained.
Discussion on the Construction of Stroke Treatment Network under the Background of Big Data
Authors: Shao ZhengGong
Published: June 2020

Stroke, also known as cerebrovascular disease, is one of the diseases with high morbidity, mortality, disability rate and recurrence rate in China. According to the epidemiological survey data released by the Chinese association of stroke, there are 14.94 million stroke patients in China, with a prevalence of 11.14.8 per 100,000 and a incidence of 246.8 per 100,000.Cerebrovascular diseases kill 1.54 million people every year, with a mortality rate of 114.8 per 100,000.It is very important for stroke patients to receive thrombolytic recanalization within “golden hour”. The purpose of this paper is to analyze how the current network model of regional heart and brain therapy is implemented and how to integrate scattered stroke data locally into a complete national data network. Stroke centers can use information analysis technology to identify potential stroke patients and provide timely treatment for stroke patients. This is also a new direction of stroke treatment that this paper aims to explore.
Innovation of Product Quality Supervision--From the Perspective of Standardization
Authors: Xu Qing , Liu Xize
Published: June 2020

Product quality supervision is the basic means to promote the production of products and operators to improve product quality. Standardization, as an institutional tool for the modernization of national governance system and governance capacity, has been paid more and more attention In recent years. In practice, standardization has been integrated into all aspects of economic and social development. This paper is based on the perspective of standardization. The research status of product quality supervision is analyzed. The status quo of standardization of product quality supervision is reviewed. On this basis, the innovation path and method of product quality supervision are put forward from the perspective of standards, which can provide reference for better exerting the role of standardization in product quality supervision.
Information Teaching Ability of EFL Teachers in Application-oriented College
Authors: Zeng Weiwei
Published: June 2020

This research carries on the investigation to the college teachers’ technology teaching ability clarified the actual situation. The research analyzes the restrictive factors that influence the development of the information teaching ability of the EFL teachers in colleges. The research using random sampling questionnaire surveys and interviews, from three dimensions: information technology teaching awareness, attitude, knowledge, skills, design and implementation. Aimed at investigating information technology teaching ability of foreign language teachers who come from 4 application-oriented college in Wuhan. The research based on descriptive, differential and correlation analysis of questionnaire data, from the teacher self-efficacy, construction and development of foreign language information-based teaching resource system, matching new teaching evaluation system, targeted, diversified and continuous training. The research expounds the concept, strategies to improve the information technology teaching ability of applied EFL college teachers.
A Comparative Study on the Effectiveness of Online Automatic Scoring of English Writing in Juku Correction Network and Mosoteach APP under Blended Teaching Mode
Authors: Qian Juan , Wang Zhihong
Published: June 2020

The rapid development of modern information technology has brought great changes to People’s Daily work and life, and the extensive application of network information technology in modern English teaching will bring about a series of innovations to the traditional English teaching mode. Based on the Blended English teaching model under the network environment, this paper attempts to clarify and present the advantages and disadvantages of two different online corrective software for college English writing teaching. Taking College English writing texts as the research object, this paper uses SPSS 19.0 data statistical software to compare and analyze the results of online automatic scoring of College English writing by Juku Correction Network and Mosoteach APP. Thus it is concluded that the Mosoteach APP is more convenient in assistant means of English writing teaching, while Juku Correction Network is more objective in the aspect of the effect of composition criticism, which will provide some reference for improving the quality of Chines college English teaching.
Action Research on Flipped Classroom Model in Chinese Context of English Linguistics Teaching
Authors: Wang Zhihong , Qian Juan
Published: June 2020

The traditional teaching model of English linguistics is not suitable for the current English major in China. Teachers should create the suitable ones in their context. Under the guidance of action research, an empirical study was conducted to investigate the feasibility of flipped classroom model in teaching English linguistics with a view to constructing the model based on Mosoteach Management System and exploring efficient teaching strategies. Findings demonstrate that flipped classroom model helps promote students’ learning abilities and comprehensive quality, and improve teaching effects as well. Modern teaching methods characterized by information technology puts forward a new requirement for teachers’ growth in professional quality.
Distribution of particulate matter (PM10) concentration in seven townships of Yangon, Myanmar
Authors: Yi Ei Ei Pan Nu , Aung Win Yu , Nway Nay Chi , Thant Zarli , Yagishita Mayuko , Ishigaki Yang , Nakajima Daisuke , Win-Shwe Tin-Tin , Mar Ohn
Published: June 2020

Particulate matter (PM) plays a crucial role in air quality deterioration in urban areas. Myanmar is a developing country in Southeast Asia and still in an early phase of urbanization. Yangon is the most populated and urbanized region in Myanmar, hosting 15% of the total population. Reports on particulate pollution in Yangon are limited as well as not up to date. Therefore, the present study aimed to assess distribution of PM10 in Seven Townships of Yangon. The result indicates a significant difference (p<0.001) in PM10 concentrations among the morning (185±85 μg/m3), the afternoon (64±35 μg/m3) and the evening (129±50 μg/m3) respectively. PM10 concentrations at different times of the day except the morning period were within USEPA guideline value for PM10 (150 μg/m3, 24h mean).
Static Energy Consumption Analysis for Android Applications
Authors: Dai Zhimin , Wang Wei , Wu Yi
Published: June 2020

Energy consumption of mobile application software is an important factor influencing the battery life of smart phone terminals. Currently, for the tens of thousands of Android software, we propose a static visual detection and classification method based on application energy consumption. Compared with the high-precision and complex application component energy consumption model, this model analyzes the bytecode images generated by the dex and xml files in the Android apk and trains them with deep learning methods. The energy consumption level of two kinds of different mobile terminal software can be obtained, which can quickly estimate the energy consumption of mobile terminal when the application is runing. Experimental results show that the model’s classification accuracy of energy consumption estimation is 50.49%, which can help mobile end users to easily predict the battery power consumed by applications.
Study on the stability of tubing under pressure operation
Authors: Tang Shiguo , Li Bin , Wang Xueqiang , Yang Bo , Dong Liangliang , Yang Hai , Liu Yanyan , Zhong Hua , Li Kun
Published: June 2020

The operation with pressure is to carry out the lifting and lowering of the tubing or oil rod without releasing the pressure. Compared with traditional downhole operation, the operation with pressure can ensure the upward and downward of the string without pressure relief. The effective plugging of the inside of the oil pipe and the annulus of the oil jacket is the main characteristic of the operation under pressure. When the tubing is lifted, the interior of the tubing is sealed and blocked due to the downhole pressure, it will generate upward force on the tubing, which will make it difficult to run the tubing. The project uses a down-pressure device to assist the down-flow of the tubing. If the down-pressure is too large, buckling instability occurs, which increases the construction difficulty for the down-run operation. Combining elasto-plastic mechanics buckling instability theory and finite element simulation method to study the compression stability of tubing under pressure. The variation law of critical buckling force of tubing diameter, length and wall thickness under pressure is analyzed by numerical model, which provides the basis for equipment design and process plan formulation.
A Study on the Process Regulation of Dairy Wastewater Treatment Based on the on-line Monitoring System
Authors: Wang Tao , Lu Qianyun , Wang Dingcheng , Yao Deng , Chuang Li
Published: June 2020

In order to avoid the pollution of dairy product processing wastewater and the waste of online water quality monitoring data, a research on the regulation technology of dairy product processing wastewater treatment based on the online monitoring data of effluent water quality was carried out. This experiment is based on a UASB-A/O treatment process pilot scale of a dairy processing wastewater treatment station, and the relevant kinetic parameters are measured to determine the correlation between the effluent water quality indicators and process operating parameters such as sludge load and sludge age. Use this relationship to guide the process parameter adjustment and improve the effluent water quality. The research results show that there is a good correlation between effluent Se and external operating parameters such as sludge load, sludge age and DO, and the optimal control range of sludge load is 0.0766∼0.0998 kgBOD/(kgMLSS·d); The optimal control range of sludge age is 33∼38 d.And when the sludge concentration (MLSS) changes between 2800∼3500 mg/L, the effluent water quality is better. According to the obtained process control method, the pilot plant is adjusted accordingly, and the effect is significant. Water quality indicators such as effluent Se and ammonia nitrogen change significantly, and the effect of nitrogen and phosphorus removal becomes better, which meets the needs of practical engineering.
Study on the Shut-in Time Law after Volume Fracturing of Glutenite Reservoir——Taking the Horizontal Well of Mahu 1 Well Area as an Example
Authors: Xin WU , Meng-yang ZHAO , Xu-dong LUO , Zhi-xiong SUN , Shi-jing ZHENG , Yi LI
Published: June 2020

Two horizontal wells have been put into operation in the Mahu 1 well area, the difference in geology and engineering between Mahu 1 well area and Ma 18 and Ma 131 well area is small, but the pressure and output drop rapidly after putting into production. Aiming at this problem, the micro-mechanism analysis is carried out, through the analogy with the neighboring area, and the reasonable shut in time is calculated through the derivation of theoretical infiltration rate formula. The results show that the reasonable closing time after horizontal well fracturing in the Mahu 1 well area is 18 days. Through the analysis of the mine test, the infiltration method and pressure drop method can accurately predict the reasonable shut-in time after fracturing, the research results have played a good guiding role in the production of horizontal well volume fracturing.
Development process of animal image recognition technology and its application in modern cow and pig industry
Authors: Liu Ting ting , feng Wu Ding , Wang Li yun
Published: June 2020

The construction of digital farms had emerged since 2018. It used computer image processing and pattern recognition technology to study cow and pig recognition through interdisciplinary research. This paper introduced specific cases about using image recognition technology to build modern cow and pig farms. Then reviewed the research on animal image recognition technology and had the following research directions: iris recognition, retinal recognition, nose pattern recognition and face recognition. In the end this article proposed how to “DIY” classification for pigs.
Effect of Oxygen Bias Pressure in Furnace on Structure and Adsorption Properties of Bamboo Charcoal
Authors: Wenhao Wang , Zhiwei Wu
Published: June 2020

In this paper, the effect of oxygen bias on the structure and adsorption properties of bamboo charcoal was studied using oxygen sensor by controlling of oxygen partial pressure in the furnace. The chemical structure and microstructure of bamboo charcoal were analyzed by infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The adsorption test for bamboo charcoal showed that the adsorption capacity of nitrophenol first increased and then decreased with the decrease of oxygen bias pressure, and the maximum adsorption capacity (222.542 mg/g) was obtained for bamboo charcoal that been prepared at a oxygen bias pressure 3.910 x 10-4 Pa. Therefore, oxygen content must be considered in bamboo carbonization process.
The influence of lithofacies features of the Permian natural bitumen-saturated reservoir rocks on groundwater formation conditions
Authors: Ibrahimov R L , Korolev E A , Eskin A A , Garaeva A N , Barieva E R
Published: June 2020

The reservoirs rocks of natural bitumen deposits of the Lower Permian system and the Kazanian stage of the Tatarstan territory are considered. The relationship of groundwater composition in bitumen reservoirs with lithologic features of water-saturated rocks is shown. Rocks compositions contribute to formation of three water classes in oil deposits: hydrocarbonate, sulfate and chloride. Hydrocarbonate waters lie over erosion downcutting of rivers in the most elevated territory part. Their origin is associated with hydrolysis and carbon-dioxide leaching of the Permian terrigenous rocks. Inland waters of hydrocarbonate-sodium (soda) composition of bitumen deposits are located above local drainage basis. They are formed as a result of sulfate reduction processes in deposits. The inland waters of sulfate composition of calcium and sodium groups are characteristic of deposits located below the drainage basis. Their origin is associated with dissolution of gypsum and anhydrites, as well as with ion exchange reactions between the calcium of the solution and the sodium which absorbed by rock complex. Chloride waters associated within the eastern side of the Melekess Depression, where there is an active hydrodynamic relationship between the Permian system aquifers and chloride-calcium salt brines of the Carboniferous rocks. The nature of the distribution and presence of aquifers in deposits is determined by the lithological features of reservoir formation.
Characterization of Modified Polyurethane Foam Adsorbents for Mercury Adsorption Applications
Authors: Darmadi  , Lubis M R , Saputra R , Alfarabi M D , Sarah S , Adisalamun
Published: June 2020

The use of modified polyurethane foam adsorbents for mercury adsorption applications can reduce the impact of mercury pollution. This study aims to study the characteristics of adsorbents made from castor oil, MDI (Methylene diphenyl diisocyanate), glycerol, distilled water and modified by the addition of zeolite and bentonite. Polyurethane foam which has optimum performance is further characterized to determine physical and chemical properties, including: functional groups (FTIR), morphology (SEM) and area (BET). The results of FTIR Characterization showed that in polyurethane foams without modification there was a C = O group which is a typical group in the polyurethane group shown in wavenumber (1654-1516 cm−1, 1680-1514 cm−1, and 1593-1516 cm−1) Whereas in zeolite modified polyurethane foam there is a C = CH group with a wavenumber of 3008 cm−1 which is a typical group for zeolite whereas in bentonite there is a C = CH group with a wavenumber of 3007 cm−1 which is a typical group for bentonite. The results of SEM characterization show that zeolite modified polyurethane foam has a smooth and flat structure with small pores and polyurethane foam with bentonite has irregular or irregular particle shape. The average BET area obtained in the PUF modification is 1.3778 m2 g−1. Whereas for the smallest BET area obtained at synthetic PUF 19.1 gr + Zeolite 40% for 0.773 m2 g−1, the area is influenced by the comparison of composition from polyurethane foam synthesis.
The treatment effect of tensile strength on polypropylene filled with silica from rice husk ash
Authors: Guswara F Y , Ihsan F , Aprilia S , Zuhra  , Fitriani
Published: June 2020

Polypropylene (PP) is a plastic that can be utilized in many sectors such as food wrappers and eyeglass lenses. Polypropylene which is filled with silica from rice husk ash can improve it is mechanical properties. The purpose of this study was to examine the effect of the addition rice husk ash on the mechanical properties of polypropylene composite. The extracted silica filtered with 325 mesh sieve. Silica was analyzed using Scanning Electron Microscopy (SEM), Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX), Fourier Transform Infra-Red (FTIR), X-ray Diffraction (XRD), and X-ray Fluorescence (XRF). Polypropylene composite is made using a simple mixing method. Polypropylene composite film filled with silica from rice husk ash was analyzed using tensile strength and elongation at break as well as functional group tests (FTIR) and composite structure (SEM). The result of this study was (1) Silica extracted from rice husk ash produced higher silica purity which is 21.93 % weight, (2) The extracted silica was in crystalline form, (3) The silica in polypropylene film was in siloxane form and (4) Polypropylene composite film with the addition of 2 % silica has the highest tensile strength and elongation at break (5.36 kgf/mm2 and 5.00 %).
Pulp and paper industry: An overview on pulping technologies, factors, and challenges
Authors: Rullifank K F , Roefinal M E , Kostanti M , Sartika L , Evelyn
Published: June 2020

The pulp and paper sector currently plays important part in the world’s economy. In this paper, we present a review of pulping technologies to convert logs or wood chips and non-woody materials into pulp for use in papermaking which consist of mechanical, chemical and semi-mechanical. It also talks about the history of papermaking and various important factors involved in producing high quality pulp and paper such as H-factor (time and temperature), alkaline charge, liquor to wood ratio, and sulphidity. This paper also discusses about challenges facing by the pulp and paper industry or processes, namely high use of energy and chemicals, as well as generation of liquid and solid wastes of large quantities. This paper will be handier for those who are new to the field of pulping research for paper production.
Peat water treatment by adsorption using kaolin-based geopolymer
Authors: Utama PS , Olivia M , Prawiranegara BA , Agusti ID , Pinem JA , Darmayanti L , Saputra E
Published: June 2020

Geopolymers have zeolite-like chemical compositions, which has some characteristics such as wide surface area and excellent stability so that it can be used for adsorbents for peat water treatment. In this research, the kaolin based geopolymers were applied as an adsorbent for processing the peat water into clean water. The variable used in this research were adsorbent mass (1; 1.5; 2; and 2.5 g), and time (30; 60 and 90 minutes). The results indicated that the kaolin-based geopolymers were very efficient in removing color and organic content. The optimum condition was mass adsorbent of 1 g and time of 30 min, and the result was 100% for removing color and 98.77% for removing organic content.
Precursor effect on the Fe-doped cryptomelane (Fe-OMS-2) prepared via one-step sol-gel route as heterogeneous Fenton catalyst for degradation of methylene blue
Authors: Awaluddin A , Amiruddin E , Anggraini R , Indriyani N , Siregar SS
Published: June 2020

The pristine cryptomelane (OMS-2) and Fe-OMS-2 (1%, 5%, and 10%) have been successfully synthesized by a one-step sol-gel method and characterized by XRD, SEM, BET surface area and AAS. The incorporation of Fe (III) within the structure of OMS-2 leads to an increase in surface area, pore-volume, and catalytic activity for the degradation of methylene blue (MB) and a decrease in the content of K+ and average of pore diameter. The catalytic test indicated that the catalytic activity of Fe-OMS-2 1% is considerably higher that of pure OMS-2. The highest degradation of MB is 93.5% achieved using Fe-OMS-2 1% after 120 minutes of degradation time, the initial concentration of MB of 20 ppm, the catalyst concentration of 0.125 mg and the H2O2 volume of 15 mL. The enhanced catalytic activities of Fe-OMS-2 compared to pristine OMS-2 for catalytic degradation of MB are associated with an increase in surface area, pore-volume, and smaller particle size. The results from catalytic studies imply that the metal doping is an effective strategy to enhance the catalytic activities of OMS-2 for degradation of MB.
Cathodic protection on stuctures of carbon steel using sacrificial anode methode for corrosion control
Authors: Komalasari  , Evelyn  , Situmeang I D R , Heltina D
Published: June 2020

The pipes for land or sea are generally made of carbon steel and susceptible to corrosion. Cathodic protection can be used to control metal corrosion in water and soil. Cathodic protection is a metal surface protection system bypassing adequate direct current to the metal surface and converting sacrificial anode area on the metal surface into cathodic region. The aim of this research was to study the effect of cathodic protection in controlling the corrosion rate of carbon steel and determine the best immersing time for sacrificial anode in 25,000 ppm sodium chloride solution to protect the cathode. Zinc was used as the sacrificial anodes for the cathodic protection. Then, the effect of immersion time (10, 20, and 30 days) and distance of the anode from the cathode (1, 2, and 3 cm) were investigated. The best protection for corrosion was obtained at immersion time of 10 days and electrode distance of 1 cm, allowing corrosion rate of 0.694 mpy with an efficiency of 81.8%.
Morphology and filtration performances of polyether sulfone membrane modified with carbon and Fe2O3
Authors: Arisandi R. , Fathurrahman A , Fahrina A. , Razi F , Jalil Z , Arahman N
Published: June 2020

Membrane separation technology has been widely applied in various industrial sectors. Some modification on membrane composition and structure is conducted to improve membrane filtration performance and mitigate fouling phenomena. Fouling on membrane surfaces lead to decrease permeabilty, increase energy consumtion, and shorten membrane life time. The aim of this study is to manufacture PES membrane which involved inorganic additives consits of Carbon and Fe2O3particles to mitigate fouling tendency. All of membranes were prepared using phase inversion method with dissolving PES polymer into dimethyl formamide (DMF). The result membranes were characterized using Scanning Electron Microscopy (SEM) to investigate morphological structure and breaking strength to determine mechanical property. Membrane filtration performance were tested using soy protein solution in cross-flow system. The results showed that the addition of inorganic particles in PES membrane caused the increasing of pores which lead to increase pure water flux from 15.14 L/m2.h to 58.67 L/m2.h. Fouling mitigation test towards soy protein also showed that carbon and Fe2O3particles enhanced membrane flux recovery ratio from 64.5 to 76%. Furthermore, the inorganic particles presence in PES membrane also improved the tensile strength of membrane up to 128 Mpa.
Utilization Palm Shell Bioelastomeric as Composite Foams for the Removal Hg2+ in Liquid Waste
Authors: Munawarah N N , Gani A , Mahidin
Published: June 2020

Efforts to deal with waste using the adsorption method showed effective results. However, it was discussed of the sorbent after the remediation process is cumbersome. An alternative to overcome this problem can be done by fixing the adsorbent into a solid form consisting of a porous polymer without changing its chemical affinity with metal ions. In this study, the adsorbent used was bioelastomeric containing activated charcoal from palm shell waste and elastomeric, which would then be contacted with Hg2+ metal ions. The process variable in this study was the composition of heavy metal Hg2+ 8, 12, 16, 20, and 24 mg/L with the contact time until it reached equilibrium. Based on the calculation, the palm shell bioelastomeric used three adsorption isotherm models, Freundlich isotherm (R2 = 0.991), Langmuir isotherm (R2 = 0.967) and Dubinin-Radushkevich isotherm (R2 = 0,871). The results showed that the efficiency of adsorption of heavy metal Hg2+ with bioelastomeric palm shell was almost close to 100%. In conclusion, palm shell bioelastomeric can be a potential adsorbent with a high heavy metal removal ability.
Production Anti Diabetes Flour from Tanjung Fruit (Mimusops elengi L)
Authors: Maula R , Nurhaliza  , Nurlaila  , Mukhlishien  , Sofyana  , Syamsuddin Y
Published: June 2020

Flavonoids are phenol compounds found in various types of vegetables, cereals and fruits. Phenol compounds have activity as antidiabetic substances. Tanjung fruit waste, contains flavonoid compounds. The purpose of this study was to extract flavonoid compounds from the fruits and to investigate the effect of temperature and drying time on the quality of the flour produced. The flour products obtained were analysed for the levels of fat, ash, water, protein and carbohydrate content, and the results were compared with standard values. The results of the analysis showed that the best flour was obtained from a process with drying time and temperature conditions of 40 minutes and 100°C, respectively. In this condition, 65% flour is produced from raw materials that met the SNI-01-3751-2006 standard of wheat flour, has a long durability from mold and microbial growth, bright colour and soft texture. Flavonoids obtained from the extraction were 105.01 mg QE / mg extract. Giving flour to white mice with the dosage of more than 1 g/kg body weight showed significant reduction of its blood glucose level.
Canning of Traditional Acehnese Food Made by Dried Little Tuna (Euthynnus affinis) Using Two Sterilization Methods
Authors: Anwar S H , Poena A A R M , Muzaifa M , Hasan H
Published: June 2020

Dried fish of Euthynnus affinis which is also known as “little tuna” or “tongkol” is called ikan kayu in Bahasa Indonesia or keumamah in Acehnese. Keumamah is similar with Japanese katsuobushi which is prepared from dried and smoked bonito. Traditional dishes which made from keumamah are quite many and the one that is famous among Acehnese is called keumamah tumis (cooked keumamah or CK) which is cooked with special Acehnese herbs and spices. This study aimed to determine the effect of sterilization methods on the quality of canned CK. Two variables examined were the treatment of fish as raw material, i.e., B1 = boiled and sun-dried little tuna, B2 = boiled and fried little tuna and the sterilization method: M1 = water bath sterilization for 120 minutes and M2 = sterilization using pressure canner at 115 °C for 60 minutes. Heat penetration study and calculation of sterilization time (Fo value) were conducted using thermocouple data logger for canned CK sterilized using pressure canner. Proximate, total plate count (TPC) analysis and pH were done for fresh fish. Canned CK were analyzed for proximate, peroxide value, and microbiological analysis (TPC). The results showed that the canned CK had an average water content of 49.85%, ash, protein and fat content were 2.18%, 17.74%, and 21.0%, respectively. The pH was 4.85, Peroxide Value (PV) of 5.87%, and the products’ TPC were < 1 x 101 colony/g. Heat penetration study indicated that the Fo for canned CK sterilized at 115 °C for 60 minutes was 5.76 min and at 100°C for 120 minutes was 0.54 min.
The Effects of Magnesium Hydroxide (Mg(OH)2) on the Characteristics and Performance of Polyethersulfone Membranes (PES) for Water Treatment
Authors: Fathanah U , Machdar I , Riza M. , Arahman N , Lubis M R , Nurfajrina F , Yolanda A , Wahab M Y
Published: June 2020

Surface water is commonly used as a source of clean water, but increasingly, surface water is contaminated with various foulants. Humic acids (HAs) are a natural organic matter predominant in ground and surface waters. HAs can reduce the quality of water. This study aims to investigate the results adding magnesium hydroxide, or Mg(OH)2, to modify polyethersulfone (PES) membranes by determining the characteristics and performance of the membranes. The mixed-matrix membranes were prepared using PES and various amounts of modified Mg(OH)2 (0%, 1%, and 1.5% wt) as nanoparticle additives. A scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), and water contact-angle analysis were used to characterize the membranes, followed by a membrane performance test (flux, permeability, and selectivity of the membrane) using a dead end ultrafiltration module. It can be concluded that Mg(OH)2 can improve the hydrophilicity of PES membrane with decreasing the water contact angle from 84.2° (pure PES membrane) to 68° (modified membrane), where ultrafiltration membranes with the highest permeability coefficient are obtained at 1.5% wt of Mg(OH)2 with a value of 41.94 L/m2.h.bar and a rejection percentage of 67.72%.
Landfill Leachate Management in Indonesia: A Review
Authors: Emalya N , Munawar E , Rinaldi W , Yunardi Y
Published: June 2020

Municipal solid waste has become a major environmental issue in Indonesia, due to the increase of population and quantity of waste, leachate production, lack of management and lack of public awareness. Landfill leachate generation and its treatment have been one of the main focus in the landfill management. Normally, leachate is formed through the seepage of water by external sources such as drainage, rain water and so on through the garbage in the landfill. Leachate contains suspended and dissolved solid pollutants, chemicals both organic and inorganic of high concentrations such as ammonia, nitrates, nitrites, sulfides, heavy metals, nitrogen and others. With such high concentration of pollutants, leachate is highly potential to pollute the groundwater and the environment. This paper presents an overview of landfill leachate management in Indonesia, discussing the characteristics of the leachate from different landfills throughout the country on the basis of the reported literatures, current practice of landfill leachate treatment in the country, and technological development of leachate treatment for possible implementation in the future.
Effect of Polyvinyl Pyrolidone Additive on the Characteristics and Performance of Polyether Sulfone Membrane for Reducement of Fe in Water
Authors: Sofyana  , Syamsuddin Y , Mulyati S , Razi F
Published: June 2020

Decreasing the iron (Fe) content in raw water until it reaches the permitted threshold value can be done with filtration using membranes. In this study, the fabrication of membrane for Fe removal was done by using polyethersulfone (PES) as polymer and Polyvinyl Pyrrolidone (PVP) as additive. The addition of PVP aims to increase membrane swelling degree. The asymmetric membrane was prepared by phase inversion method with composition 18 wt% of PES and PVP with a concentration variation of 1; 1.5, and 2 wt%. Variations in the concentration of PVP added to the membrane influence the resulting membrane. Increasing the concentration of PVP shows an increase in the value of permeability, SEM results from modification membranes also show the different morphological structures. The results of the FTIR analysis show that the fabricated membranes have different functional groups. The swelling degree of PES, PES/PVP1, PES/PVP1.5, and PES/PVP2 membranes are increased with a value of 153 to 323%, while the overall porosity value is 62 to 142%. Membrane performance on iron content with 30 ppm feed concentration gives an optimum rejection value of 98.5%.
Adsorption Behaviour of Hazardous Dye (Methyl Orange) on Cellulose-Acetate Polyurethane Sheets
Authors: Iqhrammullah M , Marlina  , Nur S
Published: June 2020

Cellulose Acetate-Polyurethane (CA-PU) copolymer has been successfully prepared by a simple blending method and examined for its adsorption capacity against Methyl Orange (MO). Functional group characterization using Fourier Transform-Infrared (FTIR) confirms the urethane linkage formation as well as the presence of several essential functional groups (such as; O-H, C=O, and aromatic ring). Surface morphology changes are also observed using Scanning Electron Microscopy (SEM), where a smoother and porous structure is obtained in CA-PU. The adsorption isotherm is examined with Langmuir, Freundlich, Halsey, and Harkin-Jura models. MO adsorption on CA-PU sheets fits Freundlich isotherm (R2 = 0.9722) with KF = 279.45 mg/g. Kinetics studies of the adsorption with pseudo first-order and pseudo second-order plots exhibit that chemisorption is the adsorption limiting-rate.
CO2 emission management in palm oil industries in Indonesia: a review
Authors: Sylvia Novi , Yunardi  , Husin Husni , Muslim Abrar
Published: June 2020

Within a few decades, Indonesia has become the largest palm oil-producing country, leaving Malaysia behind. It is undeniable that palm oil has significantly contributed to the economic growth of the country. However, the negative impacts of the palm oil industry are also evident, such as deforestation, environmental pollution, and social conflicts. The palm oil industry has been known as one of the big greenhouse gasses producers, including CO2. Regardless of the pressure from the European Union, the Government of Indonesia (GOI) has committed to sustaining the palm oil industry since there are millions of workforces depend on their livelihood from these industries. Concerning the negative impacts, the GOI requests that each palm oil company has to follow the Indonesian Sustainable Palm Oil (ISPO) certification. So far, around 20% of all palm oil industries in the country have received an ISPO certificate. It is expected by 2023, all palm oil industries have been certified by ISPO since this regulation is mandatory. Implementing all ISPO guidelines in the palm oil industry is not only capable of sustaining the industry but also protecting the environment through the reduction of CO2 and other greenhouse gasses. This paper will review the CO2 management in the palm oil industry in Indonesia in the present situation, connected with ISPO as well as RSPO (Roundtable Sustainable Palm Oil).
Physical characteristic management and palatability of processed mung bean sprout for duck
Authors: Pujaningsih Retno Iswarin , Mangisah Istna
Published: June 2020

This research was conducted to observe three forms of processed mung bean sprouts on physical characteristic and palatability in 6 weeks male ducks. Mung bean sprouts were feed in the form of fine, fresh and fermented. Completely Randomized Design was used in this study as experimental design with 3 treatments and 4 replicates. Water activity, water absorption and palatability were measured as variables. The outcomes of this study showed that treatments significantly influenced water activity and mung bean sprouts palatability (P<0.05), respectively. High significantly difference was found among treatments in water absorption (P<0.01). It can be inferred from the research that to improve palatability, duck feed must contain water content between 11.5-14.46%. Mung bean sprout waste can be provided in the form of fresh or even fermented for the duck. According to its water activity, diet consist of mung bean sprout waste in the form of dried mash is recommended to be stored for a relatively longer period of time compare to the other treatments.
Utilization of durian seeds as a substitute for corn in the laying hen feed on consumption and nutrient digestibility for improving local
Authors: Mangisah I , Ismadi V D Y B , Wahyono F , Suthama N , Sukamto B , Pujaningsih R I
Published: June 2020

The objective of this study was to evaluate the effects of durian seed meal as a substitute for corn in the ration on feed and nutrient consumption, egg weight, and production. The study was conducted for six weeks. The material used is laying hens strain Lohmann Brown age 42 weeks as much as 120 birds. The study used Completely Randomized Design (RAL) with four treatments and five replications; each replication consisted of 6 birds. The treatments were the use of durian seed meal as a substitute for corn as much as 0, 3, 6, and 9%. Data were analyzed by ANOVA. The results showed that durian seed meal as a corn substitution significantly affects the parameter observed except feed and protein consumption. In conclusion, corn can be replaced with durian seed meal maximally by 6% without decreasing productive performance of laying hens
Analysis the cause of leakage and repair of floor plates diesel fuel tank 20-D-2 at PT BADAK NGL Indonesia
Authors: Isbah I , Mangestiyono W
Published: June 2020

PT. BADAK Natural Gas Liquefaction or better known as PT. BADAK NGL is a liquefied natural gas (LNG) company in Indonesia with installed capacity 22.5 MPTA of LNG. PT BADAK NGL has LNG, LPG, condensate, and diesel fuel storage tanks. There are two diesel fuel tanks available for supporting diesel equipment such as turbine diesel, marine boats, and vehicles. One of the diesel fuel tank, named 20-D-2, was constructed in 1975 based on standard API 650-Welded Tanks for Oil Storage. In 1996, after being operated for 21 years, plate replacement was needed on the tank floor and had been done as well. But in 2017, during five years of periodic inspection, severe corrosion was found again on the plate of the tank floor. In this paper, the effort to investigate the failure and plate repairment was reported. Visual observation at internal and external side on the plate of the tank floor was conducted based on NDT method (Non Destructive Testing) testing with MFL (Magnetic Flux Leakage). Plate thickness measurement of tank floor was also conducted with UT (Ultrasonic Testing). In addition, chemical analysis of residual fuel on the tank was performed to investigate sulphur concentration that potentially corrodes the plate. Scanning Electron Microscopy (SEM) was also performed to investigate the plate surface that has been corroded. Based on the analysis above, it was known that the leakage of 20-D-2 tank floor was caused by pitting corrosion, general corrosion and crevice corrosion due to rainwater that accumulated on the bottom of tank floor. Direct contact among rain water-soil-plate of tank floor was identified as the main cause of the leakage of tank floor. After leakage mechanism was identified as well, an appropriate method could be formulated to repair the tank to avoid the leakage.
Optimization of biogas production from water hyacinth by liquid anaerobic digestion (L-AD) using response surface methodology
Authors: Syafrudin  , Nugraha W D , Matin H H A , Margaretha F , Budiyono
Published: June 2020

In this biogas research from water hyacinth, we are using Central Composite Design and full factorial design. Enzyme (X1), C/N ratio (X2) and total solid (X3) is three experimental variables were selected as controlled factors. Performed on a laboratory scale and at room temperature with 16 runs for 60 days measured every two days. The variables were set at 3-9% for Enzyme concentration, C/N at between 20-50, and concentration of TS between 5-15% (LAD condition). Based on the research that has been done, the optimum conditions for the biogas production process from water hyacinth in Liquid State Anaerobic Digestion (LAD) conditions use Response Surface Methodology (RSM) in the variable range are the C/N ratio 30-40, 6% enzyme, and for TS was not significant factor. Following the run in the central composite experimental design, these values correspond to run number 10 with variable C/N ratio 35, enzyme 6% and TS 1.59% with biogas production 202.51 mL/g TS.
Effects of cup lump natural rubber as an additive on the characteristics of asphalt-rubber products
Authors: Bahruddin  , Arya W , Yanny S , Alfian M
Published: June 2020

Asphalt penetration 60/70, which is widely used for road construction in Indonesia, is the cause of road deterioration due to high traffic loads and climate changes. Therefore, the addition of polymer additives can be one of the solutions to improve the quality and service period of asphalt. The aim of this research is to study the effect of cup lump natural rubber content on the characteristics of asphalt-rubber products. The mixture of asphalt-rubber is made by melt the cup lump at 130°C, then mixed it with asphalt at 170°C. The result showed that the addition of cup lump would decreased the penetration and weight loss properties, but increased the properties such as softening point, ductility, and Marshall stability of asphalt-rubber products. The optimal addition of cup lump was at 12% with penetration 52,4 dmm, softening point 63,5°C, ductility 142 cm, weight loss 0,068%, and Marshall stability 1904,36 kg.
Landfill mining dominated by organic solid waste: a review on its benefits, potential and challenges to recovery landfills in growing cities in Indonesia
Authors: Zaulfikar  , Sudarno  , Budiyono
Published: June 2020

One of serious impacts of increasing human population in cities is the availability of land, strategic land in particular becomes rare and as a result, its value increases rapidly. Another impact is the amount of solid waste produced which also continues to increase sharply. Although the perception and knowledge of the community regarding solid waste is improving, it does not necessarily change their paradigm, mindsets and behaviors in minimizing solid waste, the landfill is still the final solution to solid waste. In general, the carrying capacity and supporting capacity of landfills in the cities have reached the maximum limit and must be closed immediately. Initially the locations of the landfills were far from city centres, but now generally they are in densely populated urban areas. Procurement of new landfill is constrained by regulations, costs, technical and social issues. NIMBY syndrome (not in my back yard) is the culmination of public rejection, and has even become a vertical conflict between the community and the government. The study of landfill mining, particularly the study of benefits, potential and challenges in choosing landfill mining, which is dominated by organic solid waste, is an interesting study to explore. The use of compost landfill mining as an organic fertilizer for plants, or as biocover is a logical argument for recover or extend the service life of old landfill.
Combined surface hardening of parts for friction pairs of gas turbine engines
Authors: Tabatabai D S Moeni , Boytsov A G , Kuritsyna V V , Kazantsev S A
Published: June 2020

The paper presents an analysis of the methods of surface hardening of parts. The authors experimentally worked out and determined the technology of combined hardening of parts of friction pairs of hydraulic pneumatic units, which allows increasing the efficiency and reliability of the units. In order to increase the life and reliability of precision friction pairs, the production feasibility of combining spark alloying and diamond smoothing has been substantiated. Technological and software for the formation of regular micro reliefs, surface reinforcement with combined processing are proposed.
Automation of scientific and technical expertise procedures in the methodology of technological audit of aircraft manufacturing
Authors: Kuritsyna V V , Kuritsyn D N , Shahrivar S M , Kazantsev S A
Published: June 2020

The work is devoted to issues of conceptual, informational and software problems of expert assessment of the current state, problems and development potentials of technological and production systems. The purpose of the research is to develop methods and tools for variative forecasting of operational characteristics of aircraft manufacturing facilities and automation of audit procedures for complex technological systems. The originality of this method is the use of the principles of technological inheritance of quality parameters of parts in the process of processing under the influence of technological energy and their relationship to performance characteristics. The advantage is the ability to define process controllers in the image of progressive technological operations of forming and modification of precision surfaces in order to ensure a guaranteed increase in operational efficiency by their flexible integration into production systems. A hierarchical model of the technological system implemented in the MatLAB Simulink visual modeling environment is proposed. The operation of the process controller is shown by the example of a diamond smoothing operation aimed at increasing the service life of precision friction pairs. The developed methods and tools are a tool for forming an evidence base for evaluating the technological potential, reliability, stability, and repeatability of technological processes in the total quality management system.