bluuebunny/crossref_metadata_2025 huggingface dataset:
Cardiac Surgeons’ Practices and Attitudes toward Addiction Care for Patients with Substance use Disorders
Authors: Nguemeni Tiako Max Jordan , Mszar Reed , Brooks Cornell , Bin Mahmood Syed Usman , Mori Makoto , Vallabhajosyula Prashanth , Geirsson Arnar , Weimer Melissa B.
Published: May 2021

Introduction

Rates of injection-drug use associated infective endocarditis (IDU-IE) are rising, and most patients with IDU-IE do not receive addiction care during hospitalization. We sought to characterize cardiac surgeons’ practices and attitudes toward patients with IDU-IE due to their integral role treating them.

Methods

This is a survey of 201 cardiac surgeons in the U.S who were asked about the addiction care they engage for patients with IDU-IE along with questions pertaining to stigma against people who use drugs (PWUD). Descriptive statistics and multivariable logistic regression were used to identify patterns in surgeons’ practices and determine associations between attitudes toward substance use disorder (SUD) and beliefs about medications for opioid use disorder (MOUD).

Results

A minority of surgeons have access to specialty addiction services (35%) in their hospital, but when available 93% consult them for patients with IDU-IE. A quarter of surgeons reported thinking that SUD is a choice and do not believe MOUD have a role in reducing IDU-IE recurrence. Conversely, 69% of surgeons agreed with the disease model of addiction and were four times more likely to believe that MOUD has a role in reducing IDU-IE recurrence (aOR 4.09, 95% CI 1.8–9.27, p = 0.001).

Conclusion

Access to addiction specialists is limited in most hospital settings, but when available, most surgeons report consulting them and supporting MOUD. However, a significant proportion of surgeons hold non-evidence-based attitudes toward SUD and PWUD. This suggests that lack of education and stigma may affect the care of patients with IDU-IE, highlighting the need for education about, and destigmatization of addiction within health systems.
Policy integration, policy design and administrative capacities. Evidence from EU cohesion policy
Authors: Domorenok Ekaterina , Graziano Paolo , Polverari Laura
Published: May 2021

Although policy integration research has been burgeoning over the past decade, numerous blank spots exist in our understanding of the rationale, the policy-making implications and implementation challenges of integrated policy designs. This study aims at improving our knowledge in this field by reflecting on the relevance of administrative capacities for the development and implementation of integrated policies. Based on an in-depth analysis of the implementation of European Union (EU) policies for sustainable urban development in two meso-level authorities (Scotland and Veneto), evidence is provided that both administrations have introduced a range of capacity-building provisions in order to enable the replacement of sectoral policies with a comprehensive integrated strategy. However, the specific policy and governance settings designed with the purpose of enhancing administrative capacities differed significantly between the two contexts, largely depending on public administrations’ strategies and on the salience of EU policies in the respective political arenas.
Degenerate asymmetric quantum concatenated codes for correcting biased quantum errors*
Authors: Fan Ji-Hao , Li Jun , Chen Han-Wu , Liu Wen-Jie
Published: May 2021

In most practical quantum mechanical systems, quantum noise due to decoherence is highly biased towards dephasing. The quantum state suffers from phase flip noise much more seriously than from the bit flip noise. In this work, we construct new families of asymmetric quantum concatenated codes (AQCCs) to deal with such biased quantum noise. Our construction is based on a novel concatenation scheme for constructing AQCCs with large asymmetries, in which classical tensor product codes and concatenated codes are utilized to correct phase flip noise and bit flip noise, respectively. We generalize the original concatenation scheme to a more general case for better correcting degenerate errors. Moreover, we focus on constructing nonbinary AQCCs that are highly degenerate. Compared to previous literatures, AQCCs constructed in this paper show much better parameter performance than existed ones. Furthermore, we design the specific encoding circuit of the AQCCs. It is shown that our codes can be encoded more efficiently than standard quantum codes.
Importance of heavy quark longitudinal structure function measurements at future circular collider energies
Authors: Boroun G. R.
Published: May 2021

In this article, we consider the ratio of structure functions for heavy quark pair production at low values of

. The importance of this ratio for charm and beauty pair production is examined according to the Hadron Electron Ring Accelerator (HERA) data. The behavior of these ratios is considered due to the hard pomeron behavior of the gluon distribution function. The results are in good agreement with the HERA data. Expanding this data to the range of new energies underscores the importance of these measurements for heavy quarks. The ratio of charm and beauty structure functions at the proposed Large Hadron electron Collider (LHeC) is considered as a function of invariant center-of-mass energy. For top pair production this ratio is extracted with known kinematics of the LHeC and Future Circular Collider electron-hadron (FCC-eh) colliders. Comparison of the results obtained for the ratio of top structure functions in LHeC and FCC-eh are proportional to the specified inelasticity

range.
Transport Vehicle Maintenance Optimization
Authors: Redreev G V , Luchinovich A A , Boltovsky S N
Published: May 2021

The successful maintenance of transport vehicles in operable condition is facilitated by the proper assessment of their technical condition and forecasting its changes. The efficient operation of vehicles is only achieved if the changes in the engine load in the forecast cause changes in the dynamics of technical condition parameters. Besides, forecasting can help reduce vehicle repair costs. The forecasts are based on vehicle component, assembly, and subsystem failure statistics over a certain period. We must understand that the overall failure values include both gradual and sudden ones. While classifying failures as gradual or sudden when performing repairs is not challenging, forecasting sudden failures is quite difficult. We suggest failure forecasting methods based on the statistical sampling and in line with the following assumptions: Gradual failures are associated with the intensive operation of vehicles and their changes are proportional to the changes in vehicle operation duration. Sudden failures do not depend on the vehicle workload but have an inverse effect on it: the more sudden failures there are, the less useful work vehicles can perform. Thus, it is possible to describe the changes in gradual and sudden failures over time. It can expand the theoretical understanding of vehicle operation and provide repair forecasting tools to operators and maintenance companies.
The Need to Digitalize the Potentially Productive Fuel and Energy Balance in the Western Economic Zone of the Sakha Republic (Yakutia)
Authors: Elyakova I D , Elyakov A L , Pakhomov A A , Fedorova E Y , Gogoleva I V
Published: May 2021

The article presents and justifies the development of a digital potentially productive fuel and energy balance of the Sakha Republic (Yakutia) in the context of settlements in the conditions of digital transformation of the economy. The problems traditional FEB regions creation are identified and the advantages of implementing a digital FEB of the region in the efficiency, complexity of analysis and forecasting in the long term are justified. The main stages of its development are proposed and the expected results are justified. As a result of the study, recommendations for its practical development and effective application are presented, taking into account operational current management and response, as well as realistic forecasting in the long term.
Study on prediction model of coalbed methane extraction production in goaf of Yuecheng Mine
Authors: Wang Ran , Dai Linchao , Jiang Wangang
Published: May 2021

A large number of mined-out areas are formed in the production of coal mines, which contain rich coalbed methane resources. If the coalbed methane resources in the mined-out areas are allowed to escape into the atmosphere, it will not only cause a waste of resources, but also pollute the environment and affect the underground production safety. Therefore, it is of great significance to the utilization of coalbed methane resources in the mined-out areas. However, due to the complex environment of mined-out area, the research on the prediction of coal bed methane extraction production in mined-out area has been few, and the coal bed methane extraction amount in mined-out area has a large randomness, so it can not be accurately predicted. Therefore, according to the actual pumping situation of YCCD-02 well in Yuecheng Mine, combined with the pumping curve of surface well, the prediction model of coalbed methane pumping production in goaf was calculated, and the accuracy was verified by the evaluation results of goaf resources.
Discussion on casing damage situation and prevention methods in a block
Authors: Zhang Dandan
Published: May 2021

With the development of A oilfield and the constant adjustment of water injection scheme, affected by geological, engineering and development factors, the casing of oil and water wells will be damaged to varying degrees. Casing damage not only leads to the normal production of this well, but also needs to invest a lot of money for overhaul and renewal. At the same time, it will destroy the original injection-production system in this area and accelerate the production decline. Therefore, it is of great significance to study the causes of casing damage and its prevention technology for preventing casing damage and improving injection-production relationship. In this paper, a fault block in A oilfield is taken as the research object. By analyzing the present situation of casing damage in this block and the distribution law of casing damage wells in plane and longitudinal direction, combining with lithology and pressure conditions, the causes of casing damage are analyzed, and finally the countermeasures are put forward to improve the oilfield development effect and ensure the sustainable development of A oilfield.
Study on oil-water distribution law of Saertu reservoir in T66 block of Aogula oilfield
Authors: Zhao Yue
Published: May 2021

T66 block of Aogula Oilfield is a block structure area, in which faults are relatively developed, with different oil-water systems in different fault blocks, obvious oil-water interbedding phenomenon in longitudinal direction, no unified oil-water interface and complex oil-water distribution. In order to solve this problem, the oil-water layer identification and oil-water distribution law of reservoirs in this area are studied by using drilling data and resistivity correction model, and the oil-water interpretation chart is established. The analysis shows that the whole area is controlled by fault-structure, and the oil-water difference between the two sides of the fault is large, which is obviously blocked by the fault, and the fault cutting controls the oil-water distribution Local fault blocks are controlled by structure-lithology, and the whole reservoir of high fault blocks is well developed, showing the characteristics of high oil and low water, while the reservoir of low fault blocks is discontinuous, showing the characteristics of lithologic upward dip and pinchout and lens controlling oil and water.
Analysis of measures to improve the technical level of late development of high water cut oilfield
Authors: Liu Xiaona
Published: May 2021

Oilfield exploitation has the characteristics of bad environment and complex construction. Under the background of changing oil reserves and structure, how to use advanced exploitation technology to ensure the development direction of Oilfield on the basis of gradually improving oil recovery is an important problem faced by oilfield enterprises. Therefore, the oilfield in the late stage of high water cut must improve the ability of technical personnel In order to ensure the long-term high efficiency and stable production of the oilfield, we should adopt advanced production technology, tap the potential of remaining oil in the later stage of oilfield development, control the production decline and water cut rising speed.
Research on Sand Body Description and Perforation Plan Optimization of Off-surface Reservoir in Block a of X Oilfield
Authors: Zhang Yuanyuan
Published: May 2021

Based on the previous understanding of off-surface reservoirs of closed coring wells in Block B of X Oilfield, this paper selects the “four injection and nine production” test well group in Block A as the research object, and studies the distribution characteristics of dominant bands in off-surface sand bodies. The results show that the off-balance-sheet reservoirs can be vertically subdivided into two types and seven sub-types of sand body connectivity patterns, and the understanding of sand body connectivity is deepened by finely depicting sedimentary facies belts on the plane. On the basis of the above research, according to the sedimentary environment and distribution characteristics of the dominant zones, the perforation scheme of the tertiary infill wells is further optimized, and the three principles of “no shooting in the inner front, type I and II selective shooting in the outer front, and type III and IV full shooting in the outer front” are defined, which provides a new research direction for effectively controlling the rapid rise of water cut in the initial stage of new wells and further tapping the potential of the off surface remaining oil.
Application effect analysis of fracture net fracturing technology in a certain block
Authors: Wang Shuang
Published: May 2021

During the development of a certain block in Chaoyanggou Oilfield, there are many contradictions, such as high water injection pressure and fast rising speed, difficult to establish effective displacement of oil and water wells, poor oil well efficiency, difficult to establish effective displacement by conventional fracturing and water injection development, low single well output after fracturing and poor effect of measures. In view of these problems, we conducted fracture network fracturing test in a certain block to explore effective measures to improve single well production in low permeability reservoirs, in order to provide reference for future measures to tap potential and increase efficiency.
Fracture propagation simulation and construction parameter optimization of eruptive phase volcanic rock
Authors: Zhou Changlin , Zhou Lang , Zhang Huali , Li Li , Wang Rui , Jing Ming , Zeng Rong
Published: May 2021

A large number of volcanic gas reservoirs are developed in the Sichuan Basin. Up to now, 92 wells have been drilled into Permian volcanic rock, which have good prospects for exploration. Among them, large areas of volcanic facies are distributed in the Sichuan Basin. The uneven distribution of pores in volcanic rocks of eruptive facies and the large difference in rock mechanics combination between different lithofacies make it difficult to develop volcanic gas reservoirs of eruptive facies effectively. Therefore, studying the characteristics of eruptive facies volcanic rocks and reservoir reconstruction schemes is very important for the later development of volcanic rocks Significantly, this paper builds a finite element model of a volcanic rock reservoir of the effusion facies based on the geological characteristics of the volcanic rock of the effusion facies, and optimizes the construction parameters in terms of construction displacement, fracturing fluid volume, and proppant. The research results show that, the injection pressure of the spouting phase under different stress difference conditions exhibits oscillating characteristics. The stress difference between the barrier and the reservoir is positively related to the injection point pressure and fracture fracturing. The recommended construction displacement is 4.5-5.5m3/min and the fracturing fluid dosage is 400-500m3, and the amount of proppant is between 30-40m3. The research content of this article is of great significance for the effective development of volcanic gas reservoirs in eruptive facies.
Prediction Method of TOC Content in Mudstone Based on Artificial Neural Network
Authors: Liu Dongxu
Published: May 2021

Total organic carbon (TOC) content prediction is an important index for evaluating geochemical characteristics of source rocks. Although the methods based on multiple regression and shale content index classification regression can predict TOC content of mudstone in different layers, the models are relatively simple and the results are not accurate. In this paper, the prediction method of artificial neural network is used to predict TOC content of Neogene source rocks in Liping area, Qaidam Basin. The results show that: (1) the correlation between TOC prediction curve and parameters of logging curve is significant; (2) the TOC prediction curve has obvious fluctuation, reflecting the strong heterogeneity of the stratigraphic organic matter; (3) the predicted TOC value is closer to the measured value. Using this method to predict TOC content can be widely used for oil and gas exploration and development in future.
Analysis of potential tapping and efficiency increasing measures of reservoir measures in late stage of oilfield development
Authors: Liang Chen , Gao Liqun , Liang Wang , Lei Yang , Zan Wei , Feng Li , Ma Zihan
Published: May 2021

In the process of oilfield development, with the continuous development of resource exploitation and oil transportation, the later exploitation is likely to reduce the potential energy of the oilfield, which has a serious impact on the oil exploitation. In order to make our oilfield development efficiency has been significantly improved, and effectively improve the comprehensive development and utilization efficiency of our oilfield, we must continue to use the oilfield potential enhancement technology. In the actual production process, we need to combine a variety of technologies, such as hydraulic transmission pressure fracture, water plugging, acidification and other technologies. Through the comprehensive utilization of these technologies, we can reduce the water content of comprehensive oil wells in the oilfield, effectively improve the production of the oilfield, bring greater economic benefits to the society, and promote the long-term, stable and healthy development of China’s oilfield.
Experimental Study on Gas Extraction Effect of Conventional Drilling in Coal Mining Face
Authors: Zhang Di , Yao Zhuangzhuang , Zhao Meicheng
Published: May 2021

In order to study the effect of conventional drilling gas extraction technology, combined with the observation results of upward drilling and downlink drilling field test in 81309 working face of Baode Mine. The analysis of field test data shows that under the same gas control effect, the average gas concentration and gas purity of uplink drilling are higher than that of downlink boreholes. In the extraction range, the average pumping concentration of uplink boreholes is 1.134 times higher than that of downlink boreholes, while the average pure gas flow rate of uplink boreholes is 1.296 times higher than that of downlink boreholes. The test results show that the uplink conventional drill Hole has better pumping concentration stability and extraction effect than downlink conventional drilling.
Research on Interwell Detection Based on Pseudo Random Electromagnetic Method
Authors: Li Dawei , Luo Lintao , Gao Qingnan , Sun Huafeng
Published: May 2021

At present, a large amount of oil reserves exist in underground oil reservoirs in the form of remaining oil. Therefore, to improve oil recovery, it is necessary to increase the recovery rate of remaining oil, and the well is a main area of remaining oil, so the detection of interwell reservoirs is of great significance. In view of this, this article first gives the general plan of the pseudo-random electromagnetic method for cross-well exploration, and analyzes the principle of the pseudo-random signal correlation identification technology based on the Wiener-He Fu equation; secondly, analyzes the common pseudo-random sequence Characteristics; again, based on the use of line source theory, a cross-well detection model is established, and the feasibility of the built model is verified; then the conductivity changes, buried depth changes and thickness changes of anomalous bodies are used for non-uniform wells. The influence of the electric potential distribution of the probe model; finally, the difference of each impulse response is analyzed.
Determination of available phosphorus in alkaline soil by molybdenum blue spectrophotometry
Authors: Lin Xue , Zhang Jingyu , Chen Hong , Han Lu
Published: May 2021

A rapid and accurate method for the determination of available phosphorus in alkaline soil by molybdenum blue spectrophotometry was established. The alkaline soil samples were extracted by Olsen method. The effects of absorption wavelength, amount of chromogenic agent, amount of reducing agent and colour reaction time on the determination results were investigated. The results showed that the optimal conditions were as follows: the maximum absorption wavelength was 700 nm, the amount of chromogenic agent was 1 mL, the amount of reducing agent was 1 mL, and the colour reaction time was 15 min. The linear range of phosphorus concentration was 0.3 μg/mL ~ 1.8 μg/mL, and the recoveries ranged from 88.67 % to 92.17 %. The method is simple, sensitive and accurate.
Analysis of Influencing Factors and Evolution Law of Surface Anti-slide Performance of SMA-13 Based on Expressway Physical Engineering
Authors: Zhu Yongqiang , Wu Shaoming , Liu Feng , Xu Xinquan
Published: May 2021

Relying on the physical projects of Guangdong Province Chaohui expressway, Wushen expressway Renbo Section and Foqingcong expressway, based on asphalt and asphalt mixture test and on-site SFC test detection, through mathematical statistics, the factors affecting the skid resistance of SMA-13 asphalt mixture are obtained. At the same time, based on the observation of anti-skid performance of SMA-13 asphalt pavement from one year after construction to one year after opening to traffic, the change law of anti-skid performance of SMA-13 asphalt pavement from post-construction, temporary pass, acceptance and opening to traffic is obtained. The research results show that factors such as asphalt binder, mineral aggregate synthesis gradation, different oil-stone ratios and aggregate processing technology are possible factors that affect the anti-skid performance of SMA-13. The early anti-skid performance of SMA-13 asphalt pavement usually cannot meet the acceptance standard of SFC=54. However, the SMA pavement after construction can be spread with 3∼5mm gravel to improve its early anti-skid performance, and the on-site treatment effect is better.
Study Characteristics of Asphalt Concrete Lapis Aus (HRS-WC) By Using Sand Pumice For Material Substitute
Authors: Rizal M , Darwis M , Ridwan I
Published: May 2021

Tidore Islands has the potential of natural resources in the form of the availability of plenty of floating sand. This study was conducted to determine the effect of the use of floating sand as a substitute for sand on the characteristics of asphalt concrete mix wear (HRS-WC). This study uses the methods of The Asphalt Institute, Indonesian National Standards (SNI), and General Specifications 2018-Section 6.3. Percentage variation used in replacement material is 15% of normal sand: quicksand 15%, normal sand 7.5% : 7.5% quicksand, normal sand 11.25% : 3.75% quicksand and sand floating 11.25% : normal sand 3.75%. For find out the Marshall characteristics of the HRS – WC (Hot Rolled Sheet-wearing course) mixture by using a substitute for floating sand aggregate. Results of testing marshall with sand floating 11.25% sand normally 3.75% indicates the value of the stability of the highest = 1361.43 on levels of bitumen 6%, sand normal 15% to the value of the stability of the highest = 1408.6 at the level of asphalt 5.5%, the highest stability value = 1435.9 at 7% asphalt content, the highest stability value = 1472.2 at 6.5% asphalt content, and the highest stability value = 1687.8 at 6% asphalt content. And the average value of stability is 1473,19.
Feasibility Study of Micro Hydro Power Plant in Oboi River, Tutuling Village, East Halmahera Regency
Authors: Misbah Z K , Rizal M , Sahril R S M
Published: May 2021

Restricted electricity is one of the resistors in improving development and empowering communities, especially in rural areas. The utilize of MHP as an alternative energy because its cost friendly, user friendly, environmentally friendly, and material friendly. Those are expected to be the proper solutions to overcome inadequate accessibility of rural communities, such as in Tutuling village, East Halmahera Regency. This study uses the frequency distribution method and is tested using a probability test to calculate rainfalls. The buoy method for calculating river discharge and Rational method for calculating flood discharge known as Flow Characteristicto calculate the mainstay discharge while Geometric Method aims to calculate the Projection of Population Amount. Based on the results of the research and analysis of calculations on the Feasibility Study of Potential Micro Hydro Power Plants in the Oboi River. It can be concluded that the river discharge available at MHP in Tutuling Village Q river = 2,3171 m3/sec with reliable discharge Q reliability = 2.2545 m3/sec and effective fall height (Head) H = 30 meters with the amount of power generated by Pnet = 219.2342 kW. The total number of houses that have been electrified is 894 houses. Moreover, finding how many houses that capable of being raised in the future for about 2 decades ahead is the ultimate aim of this research. As a result, the calculated population is projected to address the number of households (houses), which likely to electrified for over 20 years to come is approximately 661 households.
Porosity Analysis and Compressive Strength of Normal Concrete with Synthetic Wood Waste Filler Additives
Authors: Kartini Wahyu , Sumaidi
Published: May 2021

To improve the quality of normal concrete often used additional materials such as fillers, to reduce the cavities in the concrete (porosity). Fillers can fill pores in concrete due to gaps from aggregates, if the empty space is reduced, the compressive strength value of the concrete will increase because the cavities in the concrete can result in cracks during loading. The filler used is synthetic wood waste from PT Dominic NISI which makes multiboard from cement. Synthetic wood fillers are not reactive with water, because the silica content in this filler comes from cement which has been reactive when making synthetic wood, therefore this filler is only as a filler in concrete. The optimal value of porosity testing was 9.774% with variations in the addition of 15% synthetic wood waste filler, has decreased porosity by 7.914% compared to concrete without synthetic wood waste filler. While the optimal value of compressive strength with the addition of synthetic wood waste filler at 10% variation of 41.594 Mpa, an increase of 27.09% compared to concrete without synthetic wood waste filler.
Decision Support System for Departemen Selection for Prospective Students using the Naïve Bayes Method and Analytical Hierarchy Process Model at Faculty of Engineering Universitas Musamus
Authors: Zubaedah R , Lintang M , Pratama Putra Nasra
Published: May 2021

For prospective new students often feel confused in choosing majors to continue their education at the University. The faculty of engineering is one of the favorite faculties for prospective students but sometimes most feel confused choosing what majors are in accordance with their academic abilities, so that the selection of majors often follows the choice of their closest friends or their parents’ choices. The selection of inappropriate majors will affect the future of the prospective new student. For this reason, prospective new students must know their academic abilities and interests. With a decision support system for determining majors, it is hoped that it can help prospective new students to find out the greatest potential of the choice of majors in accordance with their academic abilities and talents. Decision Support Systems made implementing the Naïve Bayes method to find out which prospective new students can potentially enter one of the departments in the technical faculty other than that the use of the Analytic Hierarchy Process model is used to find out the right choice of majors. The Naïve Bayes method refers to the rules for admitting new prospective students, which will obtain the probability formula yes and the probability formula no, to be used in calculations with data samples. The AHP model refers to the value of subjects that are tested or tested on the admission test for prospective new students. Calculations using Naïve Bayes for student data samples for the 2019-2020 school year, using 10 sample data on prospective students, obtained 3 students who did not enter the department of engineering or have no academic potential to enter the department of engineering. While other students who entered were calculated using the AHP Model, and obtained 1 student whose majors were not appropriate. While other students have chosen the right majors according to their academic abilities. In the end this Decision Support System can be used to find out which potential new students are potential and who have no potential and can also provide recommendations for the selection of the right majors in accordance with the academic abilities of prospective new students.
One Line Soft Keyboard with T9-keys Layout Proposal on Smartwatch Touch Screen Device
Authors: Mandyartha Eka Prakarsa , Atmaja Pratama Wirya , Wahanani Henni Endah , Swari Made Hanindia Prami
Published: May 2021

A smartwatch is a mini-sized digital computer device that functions apart from being a watch and can also perform intelligent computing tasks. Due to screen size limitations, a smartwatch requires special design techniques on its input and output to allow interaction with its users. Text entry is often required by many applications, but because the smartwatch screen is small, text entry techniques commonly used on personal computers are impractical when applied to smartwatches. In this study, we introduce a design concept proposal for a soft keyboard called One Line Soft Keyboard with T9-Keys Layout. The soft keyboard design concept is expected to reduce the space on the keyboard on the smartwatch screen, along with the use of widely used button layouts that are familiar to users.
Impacts of Addition Electrical Distribution Substation Allocation on Overloading Feeder
Authors: Hardiantono Damis , Mangera Paulus , Letsoin Yohanes , Ponadi Acep
Published: May 2021

Percentage of maximum loading on distribution transformers according to the provisions does not exceed 80% of the capacity of the transformer. If the loading is more than 80%, it can disrupt the quality and continuity of the distribution of electric power to consumers. The analysis aimed to: determine the amount of voltage drop and power loss that occurs before the installation of the addition electrical distribution substation. The analysis done by taking a case study on existing distribution substation(named MRK 051), its have 4 (four) electrical line services (line A, line B, line C and line D) and addition electrical distribution substation (named: MRK 267) at Muli feeder in PT. PLN (The National Electricity Company) Region Merauke. Impact of addition electrical distribution substation was conducted by using analytical mathematic to compare two variable: drop voltage and power losses. The result revealed that: drop voltage at MRK 051 before addition electrical distribution substation allocation are valued meanly more than 10% and power losses are 1,22 kW (kilo-Watt) at line C. After addition electrical distribution substation allocation, drop voltage reduced to smaller than 10% and power loss reduced to 1,06 kW (kilo-Watt) at line C.
Mobile robot painted dashed lines as road markings
Authors: Wahyuni Sri , Budiarto Hairil , Jamilah Nafizatul
Published: May 2021

Painting road markings is one of the infrastructure works that can provide road markings on roads. The fuzzy method is used as a value to determine the midpoint of the width of the road and the robot is on the middle side of the road, then produces a velocity value on the robot that is maintained by the PID method. The result is that the robot can detect the sidewalk with an ultrasonic sensor on the difference of the right sensor error 0.2 cm and the left sensor 0.5 cm through comparison of detection by the sensor and the ruler. The robot can maintain speed and the output value produced by fuzzy speed is 30, then used as input by the PID method with constant values Kp = 2.5, Ki = 0, and Kd = 0.8. The process of painting using a roll model paint tool produces a length of painting 29-31 cm and a long line breaking range of 25-27 cm with a white line width of 8.5-9 cm.
Water Treatment Installation Network Design In Kali Veda Housing - Merauke
Authors: Paresa J , Utary C , Riadi MS
Published: May 2021

The rapid population growth that makes Merauke Regency need to be anticipated, especially in the amount of waste that can damage infrastructure such as roads, bridges, drainage, good health. To find out the dimensions of a wastewater installation by considering the capacity of the house needed from a house in the planning location. The research method used is the calculation, calculation and design According to the population to Obtain the population, the dimensions of construction of the WWTP and the design results According to the population. The results of the study of wastewater in the residential area of Kali Veda in Merauke vary greatly, ranging from floating in light gray, brown to black, starting from the smell of waste water (replace). The amount of wastewater is determined to be 60-80%. The value of community sanitation in the score is not good Because The ideal average value (Mi) is <37.25 with a value of 37.13%. Communal wastewater with a plan for 20 years. The population is 1,875 people, the criteria is 80 L / person / day. The average discharge is 42 liters / day / person, peak discharge is 75.6 liters / day / person. Processing capacity of 142.8 m3 in 2037. The design of the fat separator volume is 29.54 m3, the reservoir Leveling / wastewater design has a volume of 47.27 m3, the initial settling tank has a volume of 29.54 m3, settling volume 29, 54 m. Filter media is used as a medium for the plastic material, durable, has a large specific area, light and Also has a large volume of the cavity so that the deadlock media is very small. The pipe diameter of (black water) is 100 mm, material from PVC, Pipe diameter (gray water) is 100 mm, material from PVC. The diameter of the main pipe is 150 mm.
Hoist Tulangan Machine Maintenance Design Using Lean Maintenance Method (Case Studi Of Pt. Xyz)
Authors: Azhari Winan , adi Muhammad As’ , Dewi Alina Cynthia , Mahfud Halim
Published: May 2021

PT. XYZ is a company engaged in manufacturing concrete. There are many machines that used in this company, one of them is the Reinforcement Hoist machine. The Reinforcement Hoist machine is the engine with the highest downtime on line 8 during 2019 with 90 hours. The maintenance system that applied in this company is corrective maintenance. To implement a preventive maintenance system, researcher has used the Lean Maintenance method to find the MTTF value for each component and analyzing maintenance activities by Maintenance Value Stream Mapping (MVSM).The purpose of this research was to determine the critical components of the Reinforcement Hoist machine using FMEA, determine the reliability value of machine using RBD, determine preventive scheduling using selected distributions, and calculate maintenance efficiency using the Lean Maintenance method. From the results of the FMEA critical components are the Gearbox and End Carriage components. The Reliability Value of the Reinforcement Hoist engine is 85.69% with MTTF Gearbox component every 3 days and the End Carriage component every 6 days. The results of the Maintenance Efficiency of the Gearbox component are 49.59% and the End Carriage component is 61.35%.
The Behavior of Square Crash Box in Various Cross-Section Subjected yy High-Velocity Impact
Authors: Hardi Witono
Published: May 2021

The application of thin-walled tubes as energy-absorbing equipment has been recognized in various structural systems. The structure absorbs energy by converting kinetic energy to plastic deformation energy. This study will investigate the crash box with several square cross-section ratios about the ability to absorb impact energy.

The specimens are made of thin aluminum tubes, 2 mm of thick, 150 mm of length, and the cross-section is a square with 50 mm x 50 mm of size. The size of the square cross-sections is varied by maintaining a fixed circumference. The steel impactor crash into the axial direction specimen by 80 m / s of velocity. The elastic deformation, plastic deformation, and the reaction force occurred due to the collision. The simulation is completed by ANSYS WORKBENCH based on the finite element method.

The experiments obtained the maximum deformation, the reaction force, and plastic deformation energy. The square cross-section 50 mm × 50 mm (ratio = 1) the deformation is 49,442 mm. The greater the ratio, the greater the deformation occurs. The reaction force is also getting larger with a larger ratio. On the other hand, the energy absorbed from plastic deformation is getting smaller. It has been agreed that the cross-section ratio = 1 is the best performance of the impact energy absorption.
Heat Transfer Analysis of Recuperator for Waste Heat Recovery Purpose Using LMTD & NTU Method
Authors: Pandey Agraj , Dubey Kaushalendra Kumar
Published: May 2021

The dumped heat from captive industry like power generation plant, steel plant, refineries, etc. has tremendous potential for multiple energy effect like cooling, power and heating effect. The novel thermodynamic system has been invented for waste heat recovery (WHR) purpose as organic Rankine cycle, kalian thermal system, etc. The recuperator type heat exchanger (HEx) can support for WHR at category of medium and high-grade heat discharge. The design and operating parameters of recuperator is essential for complete development and its thermodynamic analysis. The proposed title of research deals with the heat transfer modeling using LMTD & NTU approach with the help of MATLAB R2017 analytical tool. And ANSYS is used for design work of mentioned heat exchanger. The major outcomes of this paper are maximizing the heat transfer rate, improve overall efficiency by operating parameters, and HEx effectiveness. The shell and tube material, diameter, number of turns of tubes.
Validation of Valve Coefficients Using Experimentation and Numerical Analysis
Authors: Kumar K. , Komble S. , Thorat S. , Korgaonkar P. , Bartakke V. , Sonje P. , Chavan O. , Kavire K.
Published: May 2021

Today’s demanding projects calls for a quality valve that is effective in controlling the flow in the closed conduit with optimum flow velocity and least energy losses in the system. Proper selection of valve requires information on maximum and minimum flows and the head loss for wide range of applications. Hence a comprehensive research study was carried out on an improvised tricentric butterfly valve of 100 mm NB over a conventional type of butterfly valve and globe valve at different percentages of openings to determine the flow performance characteristics at CWPRS, Pune. These studies highlight the improved performance of the tricentric butterfly valve over the conventional valve. The findings exhibit the exceptional performance and advantage of equal percentage flow control loop characteristics of a new tricentric valve over the conventional type S-shape flow performance characteristic curve and the linear characteristics of the globe valve. The tricentric valve has demonstrated in the opening range between 15° and 75° showing an equal percentage characteristic. The minimal pressure drop in these valves, causes significant energy savings over a broad range of control applications like water distribution systems, power generation, refineries, chemical, and desalination. The validation by experimental data with CFD is obtained with reasonable near-optimum results for valve coefficients.
Development of a cost-effectiveness model for a Mixed Municipal Waste Incinerators for Waste-to-energy (WtE) in small town
Authors: Gotal Dmitrović L , Čerepinko D
Published: May 2021

Waste-to-energy (WtE) or energy-from-waste (EfW) is the process of generating electricity and/or heat from the treatment of waste. Most WtE processes generate electricity and/or heat directly through waste combustion. According to the waste management hierarchy this method is better than disposal but worse than recycling. Many large cities use this method because it reduces the waste problems. In this paper, a cost-effectiveness model for Mixed Municipal Waste Incinerators is developed for a town, dealing with waste management methods problems for decades. Model development begins with the development of a cause-and-effect model, better known as the Ishikawa diagram. The paper develops mathematical dependences for: the dependence of specific investments on the capacity; the dependence of investment price on the capacity; the dependence of investment price on the capacity; the dependence of operating and maintenance costs on the capacity and the dependence of total plant efficiency on the capacity.
A combination of water hyacinth (Eichhornia crassipes) and coffee grounds as a growth substrate for use in arid areas
Authors: Le Quang Huu , Nguyen Huong Thi , Nguyen Au Hai
Published: May 2021

There is a strict requirement to reduce the environmental impact of the water hyacinth and coffee grounds and an urgency to find solutions to boost farming in arid regions. In this experiment, growth substrates containing different ratios of water hyacinth and coffee grounds were used to support potted flower growth to evaluate their effectiveness as soil replacements. Two substrates were prepared by the combination of water hyacinth and coffee grounds ratios of 50:50 and 70:30, and then their physicochemical properties were measured. The growth, biomass production, and micro and macroscopic nutrient uptake of cockscomb flower (Celosia argentea var. cristata) were also determined. The findings suggest that the addition of organic raw materials improved phytonutrients and increased substrate pH and electrical conductivity (EC) of growing medium. The experimental growth substrates did not negatively affect plant growth. Overall, the results have shown that the application of water hyacinth and coffee grounds in growth substrates reduces their negative impact on the environment and increases the amount of arable land in arid, water-scarce areas with poor soil quality.
Estimating the flexural strength of concrete using compressive strength as input value in a deep learning model
Authors: Guzmán-Torres José A. , Domínguez-Mota Francisco J. , Alonso-Guzmán Elia M.
Published: May 2021

The flexural strength is a critical parameter for designing many concrete structures such as rigid pavements, beams, and bridges. The standard test for concrete is the compressive strength due to its ease of implementation. There are many proposed methods for estimating flexural strength values with enough accuracy, although it is necessary to enhance the accuracy for this estimation, and this research suggests the use of artificial intelligence methods to accomplish this goal. Artificial Intelligence has been one of the most efficient approaches for estimating material parameters because of its efficient performance. This research presents the development of a data-driven Deep Neural Network for predicting the flexural strength in concrete based on just the compressive strength test. The proposed model analyses a concrete mixture with starch and a fluidizer. The model employs a Rectified Linear Unit function and a Sigmoid function in its architecture as activation functions and a considerable perceptron’s number. Results from the analysis show an excellent accuracy of over 90%, which is remarkable. This approach showed satisfactory performance in flexural strength prediction for the analysed concrete mixture.
Shifts in hydroclimatology of US megaregions in response to climate change
Authors: Heidari Hadi , Arabi Mazdak , Warziniack Travis , Kao Shih-Chieh
Published: May 2021

Most of the population and economic growth in the United States occurs in megaregions as the clustered metropolitan areas, whereas climate change may amplify negative impacts on water and natural resources. This study assesses shifts in regional hydroclimatology of fourteen US megaregions in response to climate change over the 21st century. Hydroclimatic projections were simulated using the Variable Infiltration Capacity (VIC) model driven by three downscaled climate models from the Multivariate Adaptive Constructed Analogs (MACA) dataset to cover driest to wettest future conditions in the conterminous United States (CONUS). Shifts in the regional hydroclimatolgy and basin characteristics of US megaregions were represented as a combination of changes in the aridity and evaporative indices using the Budyko framework and Fu’s equation. Changes in the climate types of US megaregions were estimated using the Fine Gaussian Support Vector Machine (SVM) method. The results indicate that Los Angeles, San Diego, and San Francisco are more likely to experience less arid conditions with some shifts from Continental to Temperate climate type while the hydroclimatology of Houston may become drier with some shifts from Temperate to Continental climate type. Additionally, water yield is likely to decrease in Seattle. Change in the hydroclimatology of Denver and Phoenix highly depends on the selected climate model. However, the basin characteristics of Phoenix have the highest sensitivity to climate change. Overall, the hydroclimatic conditions of Los Angeles, San Diego, Phoenix, Denver, and Houston have the highest sensitivity to climate change. Understanding of future shifts in hydroclimatology of megaregions can help decision-makers to attenuate negative consequences by implementing appropriate adaptation strategies, particularly in the water-scare megaregions.
Load estimation and vibration monitoring of scale model wind turbine blades through optical fiber sensors
Authors: Cazzulani Gabriele , Cinquemani Simone , Benedetti Lorenzo , Belloli Marco
Published: May 2021

Experimental activities on wind turbine models allow to speed up their design as well as the development of robust and effective control algorithms. Intending to have large information on load distribution on the blades, this work presents an experimental setup of a model wind turbine blade instrumented with two different types of optical fiber sensors (FOS). The first one is a traditional chain of Fiber Bragg Grating sensors, able to measure a large number of strain values; the second is based on Optical Backscatter Reflectometry (OBR), able to provide a continuous strain measurement. The experimental setup is calibrated to estimate load distribution along the blade and the two technologies are compared. The results of the experimental campaign suggest that optical fiber sensors could represent an interesting solution for real-time continuous load monitoring purposes.