App Development for Internship and Empowering Programs Using Cluster Detection Data Mining during PPKM (Restriction on Community Activities): A Case Study on Universitas Pendidikan Muhammadiyah Sorong of Indonesia

Internship and community service (KPM) were annual compulsory programs conducted by Universitas Pendidikan Muhammadiyah Sorong as the implementation of students’ tridharma, which were academic activity, research, and empowerment. These programs aimed at enabling students get experiences at schools, business field, and industrial field; implement knowledge, and could interact directly with community. The process of registration, allocating students and lecturers, submitting report and grading were still conducted manually. Thus, it resulted people crowd that resulted in a cluster for covid 19 spread. This research intended to develop an app for internship and empowerment programs where the decision making used cluster detection data mining. This app was expected to ease and fasten the registration process and break the crowd since it was accessed outside of campus area. Research method used was System Development Life Cycle) Model Prototyping. The app development consisted of: (1) need collection and analysis, (2) designing, (3) prototyping, (4) trial or evaluation test, and (5) implementation. Blackbox testing was the app trial test used to try the menus and procedures function to indicate that it have been up to the operational procedure standard. The black box test resulted that there was no functional error in the whole app for internship and empowerment programs.

Deployment of State-of-the-Art Horizontal Pumping System HPS Technology in Two Water Wells to Avoid ESP Workovers

The objective of this paper is to present the findings obtained from a detailed engineering evaluation resulting from trial testing two state-of-the-art surface horizontal pumping systems (HPS's) in two water supply wells. The two horizontal pumping systems were deployed as an alternative to downhole electrical submersible pumps (ESPs) to provide the benefits of eliminating ESP workover costs, modularity regarding wellsite deployments, and enhanced maintenance operations. For this trial test evaluation method, two HPS's were deployed to boost water production to the water injection plant (WIP). To ensure a thorough evaluation, the trial test well candidates were designed to accommodate both a subsurface ESP as well as a surface HPS to provide an accurate comparison, and representation, between the different artificial lift methods. The trial test and comparison method described in this paper focused primarily on the following items; maintenance and well intervention requirements, evaluation of operational availability, including potential for cavitation and effects of interference, maximum production rates, as well as root cause engineering evaluations for mechanical seals and cooling unit auxiliary motors. Various best practices and mitigation measures were identified and are presented in this paper. With regard to the results, it was observed that each artificial lift method comprised a set of advantages and disadvantages. The decision on which type of technology to use can be dependent on several factors. Overall, the HPS's demonstrated the ability to supply water production to the WIP. The HPS did experience operational challenges in providing higher production requirements. Additional challenges were also observed in the sealing mechanism as well as the auxiliary cooling unit. Precautionary pump tripping automated protocols were taken to prevent pump cavitation due to sub-optimal intake pressure resulting from possible interference. The HPS, unlike the ESPs, did not require any workover as it is located at the wellsite and therefore resulted in substantial cost savings and was easy to maintain due to its surface application. In summary, this paper adds a new and very beneficial evaluation of HPS's, and highlights best practices and lessons learned to the existing body of literature. The new information discussed in this paper is highly beneficial to engineering selections of artificial lift methods and to the successful implementation of HPS's in the industry.

DEVELOPING AN E-BOOK BASED INTRODUCTION TO ECONOMICS LEARNING MATERIALS USING ALDIKO CLASSIC APPLICATION FOR SOCIAL SCIENCES STUDENTS

This research has a long-term purpose: to implement the study of introduction to economics effectively and efficiently. The learning materials developed were the non-printing type using the Aldiko Classic application so that the students do not have to spend more money to buy the printed learning material. The students just have to download the application (for free) in Playstore and install the learning materials of introduction to economics developed in such application. It was expected that the social sciences education students better understand the learning materials taught by the lecturer using the e-book and ease them to study independently. The stages in developing the e-book based learning material are as follows: 1.) analysis stage (analysis) covers the analysis of learning sources and learning material requirement, 2.) design stage (design) is to determine the learning material framework, cover learning material, layout, references, and creating assessment instrument of learning material, 3.) Development stage (Development) covers developing an e-book based learning material, experts validation and revision, 4.) implementation stage (implementation) is the trial test of learning material which has been validated, 5) Evaluation stage (Evaluation) is the stage to analyze weakness and strength of learning material which has been tested to students. The research results are 1) the development of an e-book based introduction to economics learning material has excellent feasibility because it has been conducted validation with an average score of 83% (valid). 2) the learning material of e-book based introduction to economics was declared practical to be used by the students based on the results of the response questionnaire with an average score of 77% (practical).

Development of Board Game Media in Art Culture and Craft Learning at 5th Grade of Elementary School

Indonesia has a variety of cultures including traditional dances that students must know and which need to be socialized in learning. This socialization is carried out through education that is packaged as attractively as possible, namely media in the form of games (board game), especially for students. This study aims to introduce and memorize the dance culture of Indonesia in fifth grade at the elementary school level. To find out how the process of media development and how the quality of the media. This research is a type of ADDIE model research proposed by Tegeh which consists of four stages, includes analyze, design, implementation, and evaluation stage. The research subjects were fifth grade elementary school students in the academic year 2021/2022, based on field trials the results of expert validity research were in the very valid category with an overall average of 89%. The results of these student responses show a total score of 47 out of a maximum total score of 52. After being analyzed and presented as a percentage, the score is 90% with a very valid category. Based on field trials, researcher conducted tests on students with the results of classical learning completeness as much as 86%. Based on the results of data analysis in general, it can be concluded that SBdP learning using the Board Game media that has been developed greatly supports the learning process. With this, it can also be seen from the number of students who have completed the trial test on the material about traditional dance in Indonesia.

Determining the causes, prevention and elimination of unstable modes of gas turbochargers of marine diesels

Annotation – With commissioning of the “Socofl Star” ship’s series, negative occurrences relative to surging of the Main Engine (ME) «Hanshin Diesel» 6LF46 turbochargers (TC) VTR 401-2. To elimination of a surging, it was necessary reduce loading of ME to the safe level. This action caused the ship’s speed to fall from 11 – 10 to 4 knots which resulted in worsening of the ship’s maneuverability characteristics and lead to the failure to provide the ship’s service speed stipulated in the contractual arrangements. Existence of this problem instigated the shipowner to charge us as experts with the mission of carrying out appropriate investigations and working out recommendations as to how to prevent and eliminate surging of TC. This task was solved on the m/v “Socofl Star”. Based on results the ME shop test and trial test of the vessel and also the saved-up data of work of ME in various conditions of swimming, the analysis of the causes of a surge of the TC was made. It is established that small values of safety factor of stability of the compressor of TC on a surging – KCT which are not allowing to ensure effective functioning of TC on the main modes of loading of ME are its reason. For increase in area of steady work of TC it is necessary to reduce the hydraulic resistance of components of the Air-Gas Path (AGP) of the ME which can be realized by changes in a design of units of air supply and gas exchange or reduction of productivity and extent of increase in pressure of air in the compressor of TC. Under operating conditions vessels an optimal solution an objective is removal of a part of blowing-off air after compressor of the TC. The air can be discharged into the flue gas header after the waste heat recovery boiler or directly into the atmosphere. This allowed the shipowner not to make constructive changes to the components of the AGP of ME and TC. The description of the operated unloading device controlled remotely on removal of air which ensures effective functioning of TC and ME that is confirmed by results of natural tests and the subsequent operating experience of vessels of the “Socofl Star” series is provided.

An optimization procedure for the soil behavior identification using pressuremeter results

The soil parameters identification procedure is usually a trade-off between sophisticated soil model behaviour and the large number of parameters to identify. Such procedure that can accomplish both of these objectives is highly desirable, but also difficult. This paper presents a methodology for identifying soil parameters that takes into account different constitutive equations. For identifying the generalized Prager model parameters, associated to the Drucker and Prager failure criterion, using an in-situ pressuremeter curve, we have proposed a procedure that is based on an approach of inverse analysis. This approach involves the minimizing the function representing the area between the experimental curve and the simulated curve, obtained by fit in the model along the in-situ loading path. A comparative study between two optimization processes is proposed. The first is based on the technique of the simplex by Nelder and Mead, while the second is based on the decomposition of the pressuremeter curve in three distinct areas. After a brief description of an existing computer program called Press-Sim, which has been written in Fortran for analyzing a cavity expansion using the finite element method, a short explanation is given about the two optimization procedures considered in this article. Then, for a chosen site where soil strength parameters are measured, the comparative study has been performed for both methods at four different depths. For the determination of the angle of friction, the two procedures yield very close values and are in a good agreement with that given by the triaxial test, while for the cohesion, they both diverge from each other on both sides of the value measured by the trial test.

Functional Threshold Power Estimated from a 20-minute Time-trial Test is Warm-up-dependent

This study investigated the influence of different warm-up protocols on functional threshold power. Twenty-one trained cyclists (˙VO2max=60.2±6.8 ml·kg−1·min−1) performed an incremental test and four 20-min time trials preceded by different warm-up protocols. Two warm-up protocols lasted 45 min, with a 5-min time trial performed either 15 min (Traditional) or 25 min (Reverse) before the 20-min time trial. The other two warm-up protocols lasted 25 min (High Revolutions-per minute) and 10 min (Self-selected), including three fast accelerations and self-selected intensity, respectively. The power outputs achieved during the 20-min time trial preceded by the Traditional and Reverse warm-up protocols were significantly lower than the High Revolutions-per-minute and Self-selected protocols (256±30; 257±30; 270±30; 270±30 W, respectively). Participants chose a conservative pacing strategy at the onset (negative) for the Traditional and Reverse but implemented a fast-start strategy (U-shaped) for the High revolutions-per-minute and Self-selected warm-up protocols. In conclusion, 20-min time-trial performance and pacing are affected by different warm-ups. Consequently, the resultant functional threshold power may be different depending on whether the original protocol with a 5-min time trial is followed or not.

Tasamuh Based E-Module Developtment in The Fiqih Subject for 10th Grade Students in Islamic Senior High School

The aim of this study is to produce the teaching material product in the form of tasamuh based e-module in the fiqih subject that have the accurate materials, feasible design, and materials that suitable for the 10th grade students of Madrasah Aliyah. The research method used in this study is Research and Development with the development model by Borg & Call (1983) which has been simplified, they are 1) Research & Information Collection, (2) Planning (3) Develop Preliminary Form of Product, (4) Preliminary Field Testing, and (5) Main Product Revision. This study reveals that; (1) the final product of this development is tasamuh based fiqh e-modul with the materials about corpse’s management in the perspective of 4 madzhab, (2) The result of the 2 material experts‘ trial test about the material accuracy contained in the teaching materials got the percentage of 90.83%, it shows that the accuracy of teaching materials is very accurate, (3) The result of the 2 media experts’ trial test about the design feasibility got the percentage of 91.6%, it shows that the teaching materials has the very feasible design, (4) the result of the fiqih teachers’ trial test showed the percentage of 88.33%, it shows that the developed e-module is suitable for the 10th grade students of Madrasah Aliyah.

On-Farm Evaluation of Nozzle Types for Peanut Pest Management Using Commercial Sprayers

Growers have rapidly adopted auxin-resistant cotton and soybean technologies. In Georgia, growers who plant auxin-resistant cotton/soybean are required to utilize nozzles that produce larger (coarser) droplets when spraying auxin herbicides to minimize potential off-target movement of pesticides. Consequently, these nozzles are also used in peanut (an important rotational crop with cotton) since changing nozzles between crops is uncommon for growers. However, larger droplets can result in reduced spray coverage which may lead to less effective pest control. Therefore, seven on-farm trials were conducted in commercial peanut fields using commercial sprayers from 2018 to 2020 across four different locations in Georgia to compare the spray performance of air-induction (AI) nozzles that produce very coarse to ultra coarse droplets (VMD50 ≥ 404 microns) with non-AI (conventional flat fan) nozzles that produce medium to coarse droplets (403≥VMD50≥236 microns) for pest management in peanuts. For each trial, test treatments were implemented in large replicated strips where each strip represented a nozzle type. For nozzle comparison, XR and XRC represented non-AI nozzles while TADF, TDXL, TTI, and TTI60 represented the commonly used AI nozzles in these trials. Spray deposition data for each nozzle along with disease ratings, weed and insect control ratings were collected in all on-farm trials. Peanut yield was collected at harvest. Results indicated that the AI nozzles produced larger droplets than the non-AI nozzles in all nozzle tests; however, the spray coverage varied among the nozzle types. Nozzle type did not influence pest (weed, disease and insect) control, or peanut yield (p≤0.10) in any of the on-farm trials. These results suggested that peanut growers can utilize these coarser droplet nozzles for pest management in fields with low to average pest pressure during the season. Future research on nozzle evaluation needs to investigate the influence of droplet size, carrier volume, and pressure on coverage and canopy penetration.

THE ROLE OF SOFTWARE TESTING FOR TEAM DEVELOPMENT

The peculiarities of software product testing processes while working in the Scrum-team were studied. The types of testing characteristic of the flexible testing technique are singled out, that make it possible to make the testing process constantly integrated into teamwork, both at the stage of requirements formation and design, and at the stage of coding and generation of test sets. This is possible by making the tester's recommendations in the process of creating user stories, planning the release of the software version in terms of testing and defects, planning a sprint based on user stories and defects, performing a sprint with continuous testing, regression testing after sprint ends and reporting of results of testing. The article highlights the stages of the flexible testing process in the Scrum team. It is proposed to automate the process of flexible testing for a training team project in the Visual Studio software environment based on Team Foundation Server. Author demonstrates an example of automation of the process of flexible testing by dividing it into four quadrants to comply with the principles of working on a flexible methodology of software development. In the first quadrant there is a study of the quality of the internal code of the software product, the modular testing. To implement modular testing in Visual Studio, a new solution is created in order to generate a class for testing, where the conditions for testing are prescribed in the body of the class. The second quadrant implements the principles of system testing. At this stage the features of creating such a test artifact as test cases are demonstrated. That provides for the fulfillment of certain conditions to verify the functionality of the developing software product; linking between created test cases to user stories presented as team project tasks Product Backlog. The study demonstrates an example of manual testing using a special tool Microsoft Test Manager, which allows you to create plans, add and update test cases, perform manual tests. In the third quadrant, it was performed a trial test in Microsoft Test Manager and it was created another test artifact - error reports. The fourth quadrant automatically tests non-functional software requirements.