bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical study on the symmetric and asymmetric orientation of the crack branching in 2D plate
Authors: Dahlan H , Rusli M , As’ad A , Bur M
Published: May 2020

The phenomenon of crack branching is one of the typical fracture behaviours. The effect of crack branching orientation is investigated in this paper. By considering a static branched crack in a 2D plate under uniaxial traction, the numerical study is carried out for two study cases. The first study case is the symmetric crack branching in which the various crack branching length and orientation have the same value between both crack branching. The second case is the asymmetric case crack branching. In this case, both crack branching length has a particular constant value, Moreover, the orientation of first crack branching is constant and then the second one has various values. The stress intensity factors of the crack tips are calculated for both study cases. It is revealed for the symmetric case; the increasing of the crack branching length will increase the value of stress intensity factors KI for various orientations of crack branching. In contrast, the stress intensity factors KI will tend to decrease along with the increasing of the crack branching orientation. Moreover, the stress intensity factors KI of first crack branching will increase, but the stress intensity factors KI of second crack branching will decrease along with increasing of the second orientation crack branching for the asymmetric case. Furthermore, the direction the stress intensity factors KII will prone to change along with the increasing of the crack branching orientation. The stress intensity factor KII tends to increase along with the increasing of the crack branching orientation as well as the increasing of the crack branching length for the symmetric case. And then the increase of constant angle of first crack branching will increase significantly the stress intensity factors KII of the first crack tip along with the increasing of the second crack branching angle for the asymmetric case.
Evaluating and optimizing performance of shell and tube heat exchanger using excel-solver
Authors: Sujono S , Dewi A K , Soegiarto T S
Published: May 2020

Heat exchangers in the oil and gas industry play an important role as heat exchangers. In this research, shell-and-tube heat exchanger was chosen because this type of heat exchanger is the most widely used in the industry in general and in the oil and gas industry in particular. This research was conducted to determine the performance of shell and tube type heat exchangers in terms of thermal and hydraulic. Data acquisition is done by observing in the field. So that the data processing and calculation results are obtained as follows: Fouling factor operation 0.02823 (hr.ft2.F/Btu) higher than design 0.00485 (hr.ft2.F/Btu), Shell side pressure drop of 19.73 psi has over the maximum permissible of 10 psi, so it is time for cleaning, tube side pressure drop of 1.47 psi is still under the maximum permissible of 10 psi the effectiveness of the operation is 57.47% less than design value of 68.73%, and the simulation using excel-solver on the dirt (operating) condition result is effectiveness can be increased to 79.93%, shell side and tube side pressure drop 6.2 psi and 9.98 psi, shell side and tube side velocity 0.98 ft/s and 9.5 ft/s respectively.
Off-grid solar power plant for refrigeration system: A case study in Bandung, Indonesia
Authors: Setyawan A , Sutandi T
Published: May 2020

The tropical climate in Indonesia promises the availability of solar energy year-round. However, the utilization is very limited. This paper discuses an experimental investigation on the use of solar energy for supplying a refrigeration machine using an AC mini freezer with power input of 85 W supplied by 200 Watt-peak solar panel. The experiment was carried out in Bandung, Indonesia, and showed that the average energy density of solar radiation is 445 W/m2 while the average output of the panel is 106.4 Watts. The daily average energy supplied to the battery is 1182 Wh, sufficient for continuous operation of the freezer in 13.9 hours. If the machine has an on/off cycle with a usage factor of 56.8%, as in the experiment, the energy could operate the machine within 24.4 hours.
Development of an algorithm code concept to match the diesel engine and turbocharger
Authors: Gifari M M A , Sriyono S , Mubarak I , Noor R A M , Permana T
Published: May 2020

Not all turbochargers can utilize exhaust gases from diesel engines. The turbocharger must match with the diesel engine. Two methods for match between turbocharger and diesel engine are developed by Patil and Stones. The purpose of this research is to develop algorithm code that describe a matching concept between the turbocharger and diesel engine based on the steps taken by Patil and Stones. The algorithm has to decide whether one turbocharger match the engine with using engine specification data and turbocharger performance maps as input. One keyword to match is the mass flow rate, this parameter become consideration whether turbocharger match with diesel engine. The results show that the Patil code concept (algorithm) can make limitation area for the turbocharger, but after entering the performance map of turbocharger, it turned out that the turbocharger criteria entered were in the same place and outside the criteria. The result of Stones concept is the turbocharger performance map can cover the operation engine area.
Terrain genetic unit for spring-based regional development in mountains in Indonesia
Authors: Usman D N , Hirnawan F , Widayati S , Sriyanti S
Published: May 2020

This research was carried out in the Mount Mandalawangi region of West Java Province. The research objective is to explore the potential sources of springs in supporting the development of the region so as to encourage the economic potential of the community. The methodology used was geological mapping, spatial mapping, mapping of socio-economic conditions, mapping of water demand levels, which were evaluated using the Terrain Genetic Unit method. The area around Mount Mandalawangi is a relatively fertile area has ±36 points of springs, the discharge ranges from 0.00003 m3/sec-0.587 ltr/sec. The dominant lithology is the Mandalawangi (Qmm) Mountain consisting of glass tuffs containing pumice, and lava composed of pyroxene andesite to basalt. The results of the study using the Terrain Genetics Unit method there are 3 zones that have the potential to develop springs based on the region, Andesite Plateau, Corrugated Hills of Lapili Volcano and Corrugated Hills of Tuff Breccia Interference. The analysis is that regional development can be planned to the maximum by prioritizing the source of spring with a note that there needs to be an arrangement for the source of existing springs.
Deformability analysis of anisotropic rock
Authors: Wijaksana I K
Published: May 2020

Evaluating anisotropic mechanical properties can helps to predict the behavior of rock materials in analysis, design, and construction, and improves the quality and safety. This research discussed laboratory testing and analytical methods to determine the four values of elastic constants of transversely isotropic slate rock. In this study, a combination of experimental and analytical methods has been used to determine the four elastic constants of transverse isotropic rocks in the laboratory. Analytic calculations were performed to determine the elastic constants of rock material with the assumption of linear, elastic, homogeneous, and transversely isotropic. The strain value was determined at of 50% of peak stress on stress-strain curves. Multilinear regression analysis with least squares estimation method was used in determining the linear equation to get to the four elastic constants of the rock. The results of uniaxial compression tests revealed that for the slate rock, the deformability in the direction that is normal to the plane of transverse isotropy (θ = 85°) is greater than that is parallel to the plane of transverse isotropy (θ = 5°) or, in other words, E1 > E2.
Hydrological monitoring in open PIT mining areas using geodatabase attribute in Geographic Information Systems (GIS)
Authors: Isniarno N F , Aziz G , Iswandaru I
Published: May 2020

In open mining systems, the most important problem in mining production activities is surface water management, where surface water management is an integrated water management activity with the aim of minimizing the negative influence of surface water which consists of mine drainage methods, mine drainage, sediment separation and control. Geographic Information Systems (GIS) can be used for hydrological analysis using spatial data, especially in calculating runoff discharges from surface water. The method used in calculating runoff discharge is in the form of daily rainfall data. This rainfall data can show the influence of the catchment area which is useful for knowing precisely and accurately the runoff water discharge. Geographic Information Systems (GIS) are used to calculate variables in rational formula equations by overlay analysis. Information about digital-based hydrological conditions is very useful as a means of decision making and policies undertaken in monitoring hydrological conditions in open mines. By using a geographic information system (GIS) with a geodatabase attribute, it can be used to view general conditions in a mining area in monitoring hydrological conditions. So it is very appropriate to be used as hydrological monitoring in the mining area in making decisions that are fast, precise and accurate. Apart from that the geodatabase attribute can see the actual conditions of a mining area.
Identification of characteristics of the Kutawaringin Gold Ore Vein, Bandung, Indonesia, based on its alteration level in the bond work index test
Authors: Solihin S , Pramusanto P , Guntoro D
Published: May 2020

The infiltration of hydrothermal solutions through structures that form veinlets with different alteration levels and variations in physical strength, will influence the consumption of grinding energy during processing operations. This research uses a gold ore vein sample from the Kutawaringin area, Bandung Regency. The sample, analyzed in the field by microscopic analysis, was tested in petrography and mineragraphy in the laboratory, so that it was found to be moderate and low alterated. By taking into account the mineral composition, especially the percent of quartz minerals which when tested for Bond Work Index samples of PO and FR codes require greater energy consumption than those of the GL and KA code samples. This condition has an impact on the selection of the type of grinding equipment, if the alteration of gold ore vein is far more than the low alteration, more feasible choices based on the most vein, so it is more energy efficient. Although it results in decreased grinded production per unit time for low alteration types.
Analysis of velocity groundwater in unconfines aquifer zone using infiltration measurement
Authors: Isniarno N F , Amukti R , Nurhasan R , Rahmagustiar A , Prahasta G I
Published: May 2020

The presence of ground water is strongly influenced by the presence of recharge zones. Changes in land use can affect the availability of ground water due to changes in the rate of groundwater flow into the ground. One of the causes of flooding and inundation, this occurs because the reduction in the catchment area is accompanied by a decrease in the infiltration rate coupled with an uneven distribution of rainfall throughout the year, thus triggering inundation problems. In this study by analyzing the value of groundwater flow velocity in the free aquifer zone. The study area has various hydraulic conductivity values with values ranging from 0.69 cm / minute to 0.02 cm / minute. The very high category is in the southern part of the research area with an area of 150 Ha, the high category is in the West, East, South and North research area with an area of 21,355 Ha, and the rather high category is in the northern part with an area of 740 Ha. The study area has various infiltration velocity values ranging from 0.22 cm / minute to 1.41 cm / minute. The fast category is in the South and North parts of the research area with an area of 17,355 Ha, the rather fast category is in the North and West parts of the research area with an area of 4152 Ha. Potential groundwater catchment areas are limited by areas consisting of breccia’s, pasufufaan, or clay tuffs, fast infiltration rates - rather fast, and high hydraulic conductivity - very high. The main groundwater catchment potential zone has an area of 10,417.63 Ha, while the additional groundwater catchment potential zone has an area of 11,673.24 Ha.
Development of data communication trainer with hands-on and remote laboratory hybrid system
Authors: Jayanto N D , Pantjawati A B , Haritman E , Mulyanti B , Nurhidayatulloh N , Pratama L A
Published: May 2020

Data communication is the process of sending data that involves two or more devices connected to the network. This is influenced by several factors, depends on the type of data and data conversion media. The data conversion component can be in the form of RS232, which uses max232 IC as a conversion from TTL to Serial data or vice versa. This tool is a development of a data communication trainer where can see the characteristics of data communication via graphic LCD. Input from the trainer can be in the form of logic sent through the LCD touchscreen and received by the microcontroller. The data input will enter an Arduino, as a control component. The Arduino will process the input data and send it out as signal corresponding to the input data along with the signal characteristics. This tool is also equipped with an IoT system where input data can be put in from the internet network, and the output signal will appear on the page provided. The application of IoT to this tool makes it a hybrid system where can be accessed either directly in the lab, or via the internet.
Remote desktop system in IoT and HTML 5-based virtual laboratory for HMI (Human Machine Interface) practicum and hydraulic simulation
Authors: Jayanto N D , Kustija J
Published: May 2020

A virtual laboratory is a facility that allows access to laboratory equipment from anywhere and anytime while connected to the internet. Remote desktop systems are the basis of the development of a virtual laboratory where users can access hardware connected to the lab computer from anywhere with the agreed time. The virtual laboratory can overcome the problem of the imbalance of the number of tools available in the lab with the number of students who will do the practicum, especially the PLC, HMI, and hydraulic simulation. For accessing the lab computer, this tool uses web-based HTML and VNC (Virtual Network Computing) techniques. On the server computer, the ThinVNC server is installed, and the user, password, and port are set. ThinVNC functions as a tool that makes it easy for users to access the lab because it merely provides a web browser that supports HTML 5 such as chrome, firefox, and edge without having to install any browser plugins and does not need to install RDP, so tablet or smartphone can access the lab. When it is connected, the user can access the available lab equipment and can see the results made because there are cameras that monitor the course of the practicum.
Implementation of Building Information Modelling (BIM) Revit to meet the needs of the construction industry
Authors: Aryanti F N , Busono R R T , Siswoyo S
Published: May 2020

This research aims to know the students’ Revit operating ability on beginner level competency in extracurricular activities, in order to fulfill the needs of the Indonesia construction industry. This research was conducted by 30-second grade students of DPIB Vocational High School 2 Garut. The research method was class action research, conducted in three cycles. In the first cycle, the percentage of students learning achievement in mastering Revit was only reached Architecture 85%, Annotate 57%, and View 43%. In second cycle, students achievement increased to Architecture 90%, Structure 79%, Annotate 58%, Massing & Site 88%, and View 43%. While in the third cycle, the percentage significantly increased to Architecture 90%, Structure 82%, Annotate 87%, Masing & Site 88%, and View 86%. The average score of Revit mastery in the first cycle reached 60 (not competent category). In the second cycle, the result of Revit’s average scores increased to 77 (competent quite category). And in the third cycle, the average score significantly increases to 88 (included competent category). The conclusion of this research showed the Revit implementation on beginner level competency in Vocational High School 2 Garut had fulfilled the needs of the Indonesia construction industry.
Seismic multiattribute for predicting reservoir properties: Case study of globigerina limestone reservoir, Madura Strait
Authors: Prakoso A , Haris A
Published: May 2020

Hydrocarbon exploration requires comprehensive understanding of geological and geophysical properties of subsurface reservoir. Therefore, subsurface rock properties determination, which include total and effective porosity, clay content, and water saturation, is a very important, particularly for reservoir target. In term of spatial coverage, subsurface rock properties are then distributed by using seismic multiattribute, which is performed in two approaches – linear multivariate regression and probabilistic neural network (PNN). Linear multivariate regression seismic multiattribute assumes that the relation of seismic attributes and reservoir property is linear, while probabilistic neural network, seismic multiattribute assumes non-linear relationship. This research employed linear multivariate regression using internal attribute of seismic data to predict several rock properties. Transformation of seismic internal attribute to rock properties was attained by a series of weights derived by least-squares minimization. To estimate the reliability of the derived multiattribute transform, cross validation is used where each well is systematically removed from the training set, and the transform is rederived from the remaining wells. The prediction error for the hidden well is then calculated. The validation error, which is the average error for all hidden wells, is used as a measure of the likely prediction error when the transform is applied to the seismic volume. This method was applied to Globigerina Limestone reservoir in Madura Strait that resulted in good prediction of reservoir properties. Result of this research is used for quantification of remaining lead and prospect in the field area. Furthermore, the predicted subsurface rock properties are used as input to optimize in developing well in the proven fields.
Calculation of neutronic parameter design for MTR reactor core using safety control rods
Authors: Surbakti T , Pinem S , Suparliana L , Yogatama F
Published: May 2020

Indonesia has three research reactors that are old, so it needs to be considered designing new research reactor. This new research reactor uses compact core, MTR type, low enrichment of 235U and a new fuel, U7Mo/Al. The advantage of using this new fuel is that it can be fabricated with high density up to 16 gU/cm3. However, on this research a density of uranium was varied from 4.5 -8.3 gU/cm3. The reactor core comprises 16 fuels and 4 control rods inserted into a 5 x 5 grids. Inside the core there are irradiation facilities comprising 4 holes at the edge and 1 in the middle of the core for radioisotope production. The reactor core is also equipped with 2 safety control rods to increase the safety of the reactor operation for one cycle. This research gets an optimal core configuration with maximum radioisotope production. Analysis was performed by calculating using the WIMSD-5B and Batan-FUEL computer programs. Optimal core design a cycle length of not less than 20 days and the reactor can be operated safely with a power of 50 MW producing a thermal neutron flux greater than 1.0x1015 n /cm2s. The calculation results show that for fuel loading a density of 6.52 gU /cm3 will obtain a thermal neutron flux of 1.03 x1015 n/cm2s. The cycle length can reach 32 days. It meets safety and acceptance criteria; however, it still requires a more negative reactivity of the control rod for safe operation at 50 MW compared to other densities.
Application of animation video to improve student learning outcomes in estimating construction costs
Authors: Rahmatunnida R , Busono R R T , Ardiansyah A
Published: May 2020

This research was conducted to improve student learning outcomes in Estimated Construction Costs at SMK Negeri 2 Garut which is still low. The low student learning outcomes may be caused by the learning process that always used static visual learning media. Thus, in this study dynamic visual application in the form of animated video is considered to be able to provide a more concrete understanding to students when compared to static visuals. The research method used in this study was the R&D method with quantitative approach, one group pretest-posttest pre-experiment. The results showed that the animation video was valid with a validation value of 88.33% by the content expert and 97.92% by the media expert that falls under very valid criteria and could be used without revision. In addition, the response of 6 students during a small-scale trial was 82.41% that falls under very good criteria. In the large-scale trial phase with 30 respondents, the animated videos application get an average score of 80.61% that falls under very good criteria. However, student’ learning outcomes after the implementation of animated videos application have enhanced, which are classified as low criteria. This can be seen from the value of N-Gain produced which is equal to 0.14.
Development of authentic assessment maintenance motorcycle chassis system
Authors: Rusalam N R , Soemarto S , Munnawar W
Published: May 2020

The development of transportation in the 4.0 industry is growing rapidly, especially the development of automotive transportation. One of the developing automotive transportation is a motorcycle. motorcycle has several systems, one system on a motorcycle transportation, namely: the chassis system. The chassis system (frame) on a vehicle is one of the most important components in a vehicle. Simple maintenance can be one of the causes of damage or corrosion of the framework of the chassis system. How to properly care for a motorcycle can be obtained through training or learning. Training and learning can be obtained by attending a vocational school majoring in Motorcycle Business Engineering. The Department of Motorcycle Business Engineering provides learning in various fields of both maintenance and repair. Learning in schools cannot be separated from the grading system so it needs an appropriate grading system. One of the assessments that are suitable for learning the care of the chassis system is authentic assessment. Authentic assessment in schools needs to be developed so that graduates can meet the demands of the business world and the industrial world. Authentic assessment is an assessment of real of cognitive, psychomotor and affective aspects. The development of authentic assessment of the care of the chassis system through stages: the preparation of a grid of questions that are adjusted to competence in the cognitive aspects, the preparation of worksheets and assessment rubrics on the psychomotor aspects.
Analysis of the important role of competency of business enterprises in the industrial work practice in era 4.0
Authors: Marniati M , Wibawa S C
Published: May 2020

Advances in digital technology 4.0 become an opportunity for prospective college graduates as initial capital for entrepreneurship. College students can maximize academic competence and entrepreneurial skills through interaction with various partners during industry practice especially in the field of fashion. one of the technologies that can be utilized in the fashion industry is the use of Computer-Aided Design (CAD). The purpose of this study to determine the important role of fashion entrepreneur competence in industrial work practice in era 4.0. This study uses a quantitative approach, using the T-Test and Explanation Factor Analysis. The findings of this study are (1) industrial work practices in individual business units (boutiques, fashion houses, and fashion designers) are more effective than institutionalized business units (sewing courses, fashion design courses, and confectionary businesses), (2) entrepreneurial education has very high effectiveness in preparing practice by applying information technology to design using Computer-Aided Design (CAD).
Gaps in automotive laboratory facilities in vocational high schools with vocational technology education colleges
Authors: Asniwaty A , Sumarto S , Abdullah A G , Setiawan A
Published: May 2020

The gap in laboratory facilities between tertiary institutions and vocational high schools can hinder the process of learning good practices conducted by teachers and students. The challenge for schools to achieve vocational education goals is to provide adequate laboratory facilities. The purpose of this paper is to first determine the conditions and availability of automotive practice laboratory facilities in vocational high schools and vocational education colleges. Second, knowing the gap between the automotive practice laboratory facilities in vocational high schools and vocational technology education colleges, especially in workshop equipment and special service tools (SST). Data collection was carried out at two public vocational high schools and one public tertiary institution in West Java, using a checklist and interviews with the head of the workshop and head of the vocational high school study program, interviews were also conducted with the head of the automotive college laboratory workshop. This study concludes that the gap in practice laboratory facilities between vocational high schools and vocational technology education colleges can occur in terms of the number and condition of practical tools, while the age of a tool does not affect the practical learning process as long as the tool is still suitable for use.
Curriculum development of vocational electrical engineering to accommodate industry revolution 4.0
Authors: Ishak S A , Sukardi S
Published: May 2020

The curriculum is an important component of education which has a role to prepare students to face opportunities and challenges in the future. Nowadays, the industry revolution 4.0 era has a major influence on the educational changes. In developing the curriculum as a whole, adjusting to the latest conditions and demands of the working world in the form of upskilling and reskilling projections, as well as the students’ needs. The purpose of this study was to describe the direction of developing a vocational curriculum in order to accommodate the demands of industry revolution 4.0 as an innovative content curriculum in vocational electrical engineering education. Method this study was qualitative approach with literature review. The results obtained showed that the curriculum development of vocational electrical engineering education must pay attention to the latest trends of the working world which can lead students to work independently and be able to develop the 4C soft skills (critical thinking, creativity, collaboration and communication) skills as a complement to the hard skills which basically leads to the presence of the complex and collaborative measure to prepare students to compete in the working world and accommodate the demands of industry revolution 4.0.
Project-based learning efficacy in vocational education: Literature review
Authors: Megayanti T , Busono T , Maknun J
Published: May 2020

A shift in-demand skill in the workforce at the cognitive level and the need to adapt is a challenge for vocational graduates. Therefore a strategy is needed to enhance the 21st-century skills in vocational education. One of the strategies is implementing an active learning model such as Project-Based Learning. This article aim is to gather, summarize and integrate the quality of empirical evidence supporting links between Project-based Learning (PBL) and 21st-century competency framework. This study conducted with a systematic literature review. The data was collected from textbooks, journal articles, and internet searches. The result shows there are a lot of evidence of project Based Learning positive impact in fostering students skill in accordance to 21st-century competency framework including critical thinking, problem-solving, communication ability, collaboration ability, and creativity. The result also shows that several factors that could limit the effectiveness of PBL implementation including the teacher’s role, students’ roles, and other factors including equipment and the environment.
The investigation of teaching style: Electrical engineering teachers’ views in vocational high schools
Authors: Ramli I , Abdullah A G , Kustija J , Sumarto S
Published: May 2020

Conceptually, practical and structured teaching techniques will produce complex teaching skills and as the primary means of change that must be possessed by a teacher. This research is survey research method. The instruments used were interviews and questionnaires. Participants as informants consisted of 16 vocational teachers from 4 Vocational High Schools in Bandung. The conclusion of this study is that the teaching style applied by the electrical engineering teacher in the Vocational High Schools is a conventional teaching style based on the data obtained which is 43%. The teachers uses a classical teaching style that conveys old values and the teacher determines the subject matter by himself without asking students for opinions so that it is not in accordance with the interests of students, and there is no role of students in the teaching process so students only play a passive role. Therefore, teachers should change their teaching styles by using teaching styles that are more centered on 21st century learning which have diverse teaching styles so that students do not easily feel bored in learning and make students more involved in every aspect of learning activity so students will be trained to active in learning.
Improving student learning activities through tournament team’s games on engineering mechanics subjects
Authors: Nainggolan I A , Widaningsih L , Minggra R
Published: May 2020

Lack of variation in implementing learning method makes students do not participate actively and are bored within teaching and learning process, thus there should be a new teaching model that is intended to improve students’ active participation. This research investigated on how carefully cooperative learning model by applying Teams Games Tournament, which is to find out whether the model can improve students’ level of activity in mechanical technique subject of modelling and information design department in SMKN 1 Sumedang. The research was classroom action research conducted in two cycles. Furthermore, observation report, students’ active participation, field notes and tests as the instruments. The sample of this study was thirty five of tenth grade of DPIB 4 students who were taking mechanical technique class. The findings revealed that there is a significant improvement in students’ active participation and students’ learning outcomes. The writer saw that if students are engaged in the teaching and learning process, there will be an improvement in their learning outcomes. In addition, students’ level of activity improves in the following aspects: visual activities, oral activities, listening activities, writing activities, motor activities, mental activities, and emotional activities. The study concludes that cooperative learning model, by applying TGT model, can be recommended as one of alternative learning models which can improve students’ level of activity and students’ learning outcomes.
Measurement reliability inter-assessors in industrial practice activities
Authors: Rijanto T , Soeryanto S , Handayani N
Published: May 2020

This study aims to obtain the measurement reliability among vocational learners’ assessors in industrial practice activities. The study was conducted in Indomobil Nissan Datsun workshop. There were 32 participants from various vocational schools in East Java, both from public and private schools. Assessors consists of two people, namely the mechanic chief (foreman). The performance attributes assessed are 10,000 km periodical maintenance which includes first safety, preparation for service, and periodical maintenance service. Periodical maintenance services include (1) interior inspection, (2) exterior inspection, (3) engine room inspection, (4) suspension and wheel inspection, (5) underside vehicle inspection, and (6) final inspection. The results showed that the inter-assessors reliability was equal, rxy = 0.99. It means that the attribute scores obtained from the two assessors have the relatively similar position to the observed attributes.
Student’s green skills in agricultural vocational school
Authors: Handayani M N , Ali M , Wahyudin D , Mukhidin M
Published: May 2020

Nowadays labour market demands employees with green skills due to green economy transformation. Students of agricultural vocational school as prospective workers have to hold these skills. This study was designed to identify students’ green skills in agricultural vocational secondary schools at study program of agricultural food processing technology. Five aspects that make up green skills based on past research were examined in this study. Data were collected through a set of questionnaires intended to gauge perceptions involving 195 students from different agricultural vocational schools in West Java Province, Indonesia. The result revealed that mean score for overall green skills was fair enough. However, it needs to be increased to produce competitive graduates in accordance with employer needs. Moreover, three aspects of green skills, namely management of waste, communication skills and innovation skills to respond green challenges are lower than the mean score. Findings of this study are the initial step in describing green skills of agricultural vocational students due to the limitations of this related research. More studies should be conducted to better understand and stimulate the integration of green skills into agricultural vocational curriculum to improve students’ green skills.
Work based learning in motorcycle classroom part 2
Authors: Hafid D , Djohar A , Abdullah A G , Komaro M
Published: May 2020

This research was conducted with the aim to analyze schools of vocational education (SMK) which uses Work Based-learning (WBL) Models. This research was conducted by direct observation of students of Merdeka Soreang Vocational School Competencies in Motorcycle Business Engineering by comparing the competencies between students who use the WBL model with students who do not use the WBL model. The basic assumption of this research is practical competence will describe student to understand knowledge, attitude and skills when work in work shop. Whereas, the hypothesis of writer it that “ there are significant differences of competences between students who use the WBL learning model with students who do not use the WBL model. The method used in this research is analytical descriptive method. From the results of the study found that there are no differences in aspects of knowledge, but from the attitude and skill effects there are differences between the two classes.
Innovation assessment with employability skills for vocational students in the electrical field
Authors: Sulistiyo E , Wibawa S C
Published: May 2020

The mobility of students and the workforce between countries provides a challenge for universities to gain recognition from the global community on the results of their vocational education. This study aims to determine the outputs of the aspects of the quality of Project Base Learning (PjBL) learning outcomes which include: basic electronics and electrical knowledge, products, innovative, and creativity from the employability skills assessment model through PjBL to be better. The results refer to the assessment of employability skills through the PjBL showing that out of 100 students as respondents had a sensitivity of 85%; think newest and think adaptively 79%; 77% social intelligence; transdisciplinarity-literacy 85%; literacy ability 81%; design mindset 78%; cognitive management load 82%; virtual collaboration 84%; computational thinking, 88%. The implication that the implementation of Project Base Learning on students can be applied and validated properly.
Preparedness of vocational high schools in the face of earthquake disasters in Lembang fault area, Indonesia
Authors: Nurbani K , Abdullah A G , Surahman U
Published: May 2020

In the effort to reduce the risk of earthquake hazards in the Lembang Fault area, it is necessary to understand the level of preparedness in dealing with earthquake, especially for those who are in disaster prone areas. This study aims to find out the perception of high schools on the dangers of earthquake, as well as the preparation conducted by the schools such as campaign and simulation for preparedness if an earthquake happened, prepare a gathering point, prepare technological devices to provide earthquake disaster warnings to students, including preparation of school building resilience in facing earthquake happening in the Lembang Fault area. The result of this research indicates that the responses obtained from the interview conducted at SMK 45 Lembang and Pembangunan Negeri Agriculture Vocational High School Lembang identified that most of them know and aware that their own school is located within the Lembang Fault line and of the danger of earthquakes in the future. However, the schools have not done much preparation, including no earthquake hazard detection technology, there are also obstacles in the construction of earthquake resistant school standards that become one of the points of the lack of preparedness in dealing with earthquake disaster.
Fashion pattern maker of software application development
Authors: Rizkiah M , Widiaty I , Mulyanti B
Published: May 2020

This paper presents the software used to make patterns in making fashion patterns. The design was accepted in the form of literature reviews, journals related to pattern making software collected using search engines such as Elsevier, Sciencedirect, Google Scholar and Crossref. The purpose of this study is to collect and analyze articles relating to pattern making using software, which are expected to be able to 1) Facilitate pattern construction, 2) open media development, 3) develop pattern making systems. Based on the articles collected the results obtained from the pattern making system helped the fashion industry to improve fashion designs for pattern development as well as human models were introduced to rebuild 3D humans in computer systems. A surface leveling algorithm was developed to transform 3D designed fabrics into 2D supported patterns for production. The hope for the future rules that match the style in the design discipline.
Single-molecule chemistry. Part I: monitoring oxidation of G in oligonucleotides using CY3 fluorescence
Authors: Sobek Jens , Schmidt Marco , Grossmann Jonas , Rehrauer Hubert , Schmidt Lucas , Schlapbach Ralph
Published: May 2020

Single-molecule hybridisation of CY3 dye labelled short oligonucleotides to surface immobilised probes was investigated in zero-mode waveguide nanostructures using a modified DNA sequencer. At longer measuring times, we observed changes of the initial hybridisation fluorescence pulse pattern which we attribute to products created by chemical reactions at the nucleobases. The origin is a charge separated state created by a photoinduced electron transfer from nucleobases to the dye followed by secondary reactions with oxygen and water, respectively. The positive charge can migrate through the hybrid resulting in base modifications at distant sites. Static fluorescence spectra were recorded in order to determine the properties of CY3 stacking to different base pairs, and compared to pulse intensities. A characteristic pulse pattern change was assigned to the oxidation of G to 8-oG besides the formation of a number of secondary products that are not yet identified. Further, we present a method to visualise the degree of chemical reactions to gain an overview of ongoing processes. Our study demonstrates that CY3 is able to oxidise nucleobases in ds DNA, and also in ss overhangs. An important finding is the correlation between nucleobase oxidation potential and fluorescence quenching which explains the intensity changes observed in single molecule measurements. The analysis of fluorescence traces provides the opportunity to track complete and coherent reaction sequences enabling to follow the fate of a single molecule over a long period of time, and to observe chemical reactions in real-time. This opens up the opportunity to analyse reaction pathways, to detect new products and short-lived intermediates, and to investigate rare events due to the large number of single molecules observed in parallel.
Expanding Basic Entomological Knowledge by Using Mosquito Surveillance Bycatch
Authors: Hribar Lawrence J
Published: May 2020

Examination of bycatch in traps used for adult mosquito control surveillance and bycatch in larval sampling jars, over the past 21 yr, has revealed a number of new distribution records for arthropods. The literature is reviewed, and new distribution information is presented for 98 species of Diptera, 35 species of Copepoda, 14 species of Lepidoptera, and 1 species each of Hemiptera, Hymenoptera, and Amphipoda. Among the new information generated are new records for the United States, new records for Florida, range extensions, a new phoretic association, and at least eight undescribed species, five of which have been described and named. Examination of bycatch can provide basic identification on species distribution and seasonal abundance that might otherwise go undetected. About one-third of Florida mosquito control programs that responded to a survey indicated that bycatch from surveillance was examined. There was a moderate association between presence of a biologist or entomologist on staff and examination of bycatch. Florida mosquito control programs may be able to help fill knowledge gaps related to the state’s arthropod fauna.
Occupational Noise Exposure and Vestibular Schwannoma: A Case-Control Study in Sweden
Authors: Aarhus Lisa , Kjærheim Kristina , Heikkinen Sanna , Martinsen Jan Ivar , Pukkala Eero , Selander Jenny , Sjöström Mattias , Skare Øivind , Straif Kurt , Mehlum Ingrid Sivesind
Published: May 2020

It has been suggested that the association between self-reported occupational noise exposure and vestibular schwannoma (VS), found in several studies, represents recall bias. Therefore, we aimed to study the relationship in a large case-control study using occupational noise measurements. We performed a case-control study using data from Sweden for 1,913 VS cases diagnosed in 1961–2009 and 9,566 age- and sex-matched population controls. We defined occupational history by linkage to national censuses from 1960, 1970, 1980, and 1990. We estimated occupational noise exposure for each case and control using a job-exposure matrix. There was no association between occupational noise exposure and VS. Among subjects assessed as ever exposed to occupational noise levels of ≥85 dB (214 cases and 1,142 controls), the odds ratio for VS per 5 years of exposure was 1.02 (95% confidence interval: 0.90, 1.17). Workers with noise levels of ≥85 dB for at least 15 years (5-year latency period), showed no increased risk of VS (odds ratio = 0.98, 95% confidence interval: 0.73, 1.31) compared with those who had never been exposed to noise levels of 75 dB or higher. In summary, our large study does not support an association between occupational noise exposure and VS.
Involvement of pharmacist-reviewed urine cultures and sexually transmitted infections in the emergency department reduces time to antimicrobial optimization
Authors: Olson Amber , Feih Jessica , Feldman Ryan , Dang Cathyyen , Stanton Matthew
Published: May 2020

Purpose

To streamline workflow of the culture review process in the emergency department (ED), a transition from a nurse-driven to a pharmacist-initiated process was implemented.

Methods

This was a single-center retrospective study conducted at an adult urban level 1 trauma academic medical center. The pharmacist-initiated culture review process was compared to the previous nurse-initiated process. The primary objective was time from final culture result to patient contact by an advanced practice provider. Secondary objectives included incidence of treatment failure and hospital admission within 30 days of ED visit.

Results

A total of 283 patients met inclusion criteria: 144 patients in the pre-intervention group and 139 patients in the postintervention group. Patients were contacted a median time of 15.7 hours (95% confidence interval [CI], 9.88-18.83) earlier for definitive urinary tract infection antibiotic therapy and 46.7 hours (95% CI, 33.34-61.62) earlier for definitive sexually transmitted infection therapy in the pharmacist-initiated workflow compared to the nurse-initiated workflow (P < 0.001). Treatment failure occurred in 0.01% of patients in the postintervention group and 6.3% in the pre-intervention group (P = 0.01). Hospital admission within 30 days of the ED visit occurred in 0% of patients in the postintervention group and 4.2% in the pre-intervention group (P = 0.03).

Conclusion

Pharmacist-initiated culture review in the ED at an academic medical center reduced time from final culture to patient contact for optimal antibiotic therapy and decreased hospital admission and treatment failure rates. A change in the culture review workflow involving pharmacists appears to have a positive impact on clinical outcomes.
Pharmacokinetics of linezolid for methicillin-resistant Staphylococcus aureus pneumonia in an adult receiving extracorporeal membrane oxygenation
Authors: Nikolos Peter , Osorio Justin , Mohrien Kerry , Rose Christina
Published: May 2020

Purpose

We present a case of a 55-year-old man post right lung transplantation receiving ECMO for treatment of respiratory failure secondary to methicillin-resistant Staphylococcus aureus (MRSA) pneumonia.

Extracorporeal membrane oxygenation (ECMO) is a frequently utilized support therapy for patients with cardiac and/or respiratory failure. Dosing of medications during ECMO can be challenging due to several factors, including sequestration of medications within ECMO circuits, alterations in volume of distribution, and changes in drug clearance. The patient was initiated on empiric antibiotics, then switched to linezolid at a dose of 600 mg every 8 hours. Linezolid plasma concentrations were collected 30 minutes prior to the sixth administered dose and 30 minutes following the 1-hour infusion of the sixth dose, which resulted in values of 0.4 and 1.7 μg/mL, respectively. The ratio of 24-hour area under the curve (AUC0-24) to minimum inhibitory concentration (MIC), assuming a MIC of 2 μg/mL, was calculated using the extrapolated maximum concentration (1.9 μg/mL) and minimum concentration (0.35 μg/mL), resulting in an AUC0-24/MIC value of 10.8. Due to subtherapeutic linezolid plasma concentrations, ceftaroline was initiated and continued for a total of 18 days. To our knowledge, this is the second report to describe inadequate plasma concentrations of linezolid during ECMO.

Conclusion

In the case described here, linezolid at a dose of 600 mg every 8 hours did not achieve target plasma concentrations in a patient receiving concomitant venovenous ECMO support.