bluuebunny/crossref_metadata_2025_split huggingface dataset:
Surgical treatment of vascular ring resulting in the formation of left aortic arch
Authors: Sinelnikov Yu. S. , Shekhmametyev R. M. , Vronsky A. S. , Lazarkov P. V. 
Published: March 2022

Highlights. The described clinical case of surgical treatment of congenital anomaly of the aortic arch is of high interest to specialists due to the relatively late manifestation of symptoms, low incidence of the anomaly, prior surgical treatment of congenital heart disease in medical history, and characteristics of surgical intervention.Background. The described clinical case reports successful treatment of vascular ring formed by right aortic arch with aberrant left subclavian artery. The described clinical case of surgical treatment of congenital anomaly of the aortic arch is of high interest to specialists due to the relatively late manifestation of symptoms, low incidence of the anomaly in the population, prior surgical treatment of congenital heart disease in medical history, and the outcome of surgical treatment - newly formed left aortic arch.
PROGRAM INTERVENSI BUDAYA KESELAMATAN DAN KESEHATAN KERJA DALAM MENUMBUHKAN PERILAKU SADAR KESELAMATAN DAN KESEHATAN KERJA DI JURUSAN TEKNIK KENDARAAN RINGAN
Authors: Hermanto Didik , Rahmansyah Muhammad Shalahuddin 
Published: March 2022

Angka kecelakaan kerja dapat diminimalisir dengan mengidentifikasi faktor-faktor yang mempengaruhi terjadinya peningkatan angka kecelakaan kerja. Diharapkan bahwa penerapan program intervensi budaya keselamatan dan kesehatan kerja dalam menumbuhkan perilaku sadar keselamatan dan kesehatan kerja di jurusan teknik kendaraan ringan dapat menjadi solusi dan mengurangi angka kecelakaan kerja khususnya di Indonesia. Model keselamatan dan kesehatan kerja yang sesuai dengan karakter peserta didik SMK adalah model Health belief model . Health belief model merupakan sebuah model perilaku sehat yang mudah diterapkan dan diterima oleh masyarakat Indonesia , sehingga akan menciptakan sebuah perilaku budaya keselamatan dan kesehatan kerja (K3) dalam menjalankan pekerjaan atau kehidupan.
PENGARUH CHARACTER BUILDING, LINGKUNGAN BELAJAR DAN SELF EFFICACY TERHADAP KESIAPAN KERJA SISWA KELAS XII TEKNIK KENDARAAN RINGAN OTOMOTIF DI SMKN 1 TRENGGALEK
Authors: Aji Yudisworo , Partono Partono , Irdianto Windra 
Published: March 2022

Tujuan penelitian ini untuk mengetahui pengaruh secara persial variabel Character Building terhadap kesiapan kerja, lingkungan belajar terhadap kesiapan kerja dan self efficacy terhadap kesiapan kerja serta pengaruh secara simultan variabel Character Building, lingkungan belajar dan self efficacy terhadap kesiapan kerja. Dengan metode penelitian kuantitatif dengan jenis deskriptif. Populasi yaitu siswa kelas XII TKRO SMKN 1 Trenggalek, berjumlah 143 siswa dengan sampel 107 siswa menggunakan teknik proporsional random sampling. Instrumen penelitian yaitu angket dan dokumentasi. Uji instrumen dengan uji validitas dan reliabilitas, analisis data dengan analisis statistik deskriptif, analisis regresi linier berganda, uji asumsi klasik dengan uji normalitas, uji multikolinearitas, dan uji heterokedastisitas. Uji hipotesis meliputi uji t, uji f. Koefisien determinasi (R2) dan sumbangan efektif. Maka dari hasil analisis data diperoleh hasil bahwa terdapat pengaruh yang signifikan Character Building terhadap kesiapan kerja, pengaruh yang signifikan lingkungan belajar terhadap kesiapan kerja, pengaruh yang signifikan self efficacy terhadap kesiapan kerja dan pengaruh signifikan Character Building, lingkungan belajar dan self efficacy terhadap kesiapan kerja siswa kelas XII TKRO di SMKN 1 Trenggalek.
PENGARUH KATALITIK KONVERTER TERHADAP INTENSITAS SUARA DAN KONSUMSI BAHAN BAKAR PADA MOTOR SEBARIS 4 SILINDER 4 LANGKAH 1500 CC KONVENSIONAL
Authors: Naufal Bahiyal , Poerwanto Eko Edi , Irdianto Windra 
Published: March 2022

Tujuan penelitian untuk mengetahui pengaruh katalitik konverter terhadap intensitas suara dan konsumsi bahan bakar pada motor sebaris 4 silinder 4 langkah 1500 cc konvensional. Objek menggunakan mobil Toyota Kijang KF50 dengan perlakuan berupa variasi putaran rpm sebesar 1500, 2500, dan 3500 rpm serta penggunaan katalitik konverter (pakai dan tidak pakai). Data dianalisis statistik dengan uji Two-way Analysis of Variant (ANOVA) dengan taraf kepercayaan 95% (α = 0,05) didahului dengan uji normalitas data (Shapiro-wilk) dan uji homogenitas (Levene test). Hasil setelah dianalisis Two-way ANOVA menunjukkan bahwa katalitik konverter berpengaruh sinifikan terhadap intensitas suara dengan nilai 0,00 < 0,05 dan konsumsi bahan bakar senilai 0,00 < 0,05 pada motor sebaris 4 silinder 4 langkah 1500 cc konvensional. Hasil uji lanjut Tukey, perlakuan intensitas suara pada putaran mesin 1500 rpm menunjukkan pengaruh paling signifikan terhadap penurunan intensitas suara sebesar 77,075 dB dan konsumsi bahan bakar sebesar 76 mL.
Utilizing High Density Polyethylene (HDPE) Synthetic Aggregate as a Chip Sealing Material in Improving Skid Resistance
Authors: Rahmawati Anita 
Published: March 2022

There are four main factors causing traffic accident : human factor, vehicle factor, road factor and environment factor. Accident data from Poltabes Yogyakarata in 2007 showed that road factor causes accident is 2.45%. In effort to achieve traffic safety, the infrastructure must be considered in the first list. This research is dealing with “Utilizing High Density Polyethylene (HDPE) Synthetic Aggregate as a Chip Sealing Material in Improving Skid Resistance”. The purpose of this research is to understand the effect of chip sealing using HDPE synthetic aggregate on the skid resistance, so that the surface pavement can provide good service for traffic and road users and the quantity of accident can be reduced. In this research the skid resistance was measured using British Pendulum Tester such that the its skid resistance is also called British Pendulum Number (BPN). BPN is a measured based on 3 variations of aggregate weight being spreaded, that are 240 grams, 271 grams and 304 grams. The result of BPN will be correlated with the wet accident ratio, friction coefficient and stopping distance. The BPN values being obtained are 55.96, 55.6 and 53.4, respectively. The BPN was found to increase with the increase of aggregate weight in chip seal mixture. It was revealed that BPN with chip sealing using HDPE could be increased by approximately 10 % in comparison with that without chip sealing. In addition, chip sealing using HDPE can reduce the accident ratio by 47.32 %, improve the traffic safety by 47.32 %, and shorten the stopping distance. The greater friction coefficient the lower stopping distance, and the lower stopping distance the better traffic safety.
Pengaruh Fraksi Volume Serat terhadap Sifat-sifat Tarik Komposit Diperkuat Unidirectional Serat Tebu dengan Matrik Poliester
Authors: Berli P. Kamiel M. Budi Nur Rahman , 
Published: March 2022

Sugar cane fiber has not optimallybeen used as reinforcement of compositematerial. So far, bagasse has been used as firewood-substitute, raw material for papers, and brake lining. The purpose of this study is to investigate the effect of fiber volume fraction, Vf, on tensile strength of unidirectional sugar cane fiber/polyester composites. The material being used was sugar cane fiber, 268 SHCP BQTN polyester resin and catalyst . Fibers were soaked in alkali (NaOH) 5% for 2 hours in order to remove their impurities. Composite panels were made with a printing press and the volume fractions of the fiber were 0%, 10%, 20%, 30% and 40%. Prior to being cut into specimens, the panels were subsequenlypost-cured at a temperature of 60 0C for 4 hours. Tensile testing wa carried out according to theASTM D638 standard, and fracture area photo macrographs of selected sampleswere analysed in order to find out the characteristics of fracture. It was found out that increasing the fiber volume fraction resulted in thedecrease of tesilestrength and strain,butincrease of the modulus of elasticity . The highest average tensile strength and strain was obtained at Vf = 0% (31.44 MPa and 9,11%), and a tensile modulus of elasticity was at Vf = 20% of 426.92 MPa. The observations on the photo macrographs showed thatcomposite fracture predominantly occuredspecimens withVf = 30%, and single fracture combined withfiber pull-out was identified for those ofVf = 0%, 10%, 20% and 40%.
Perbaikan Balok Beton Bertulang dengan Metode Jacketing dengan Bahan Ferosemen Akibat Beban Siklik pada Beban Ultimit
Authors: Muslikh Bagus Soebandono , Andreas Triwiyono, 
Published: March 2022

A large number of buildings construction was made of reinforced concrete structure, composed of concrete and steel. The reinforced concrete structure elements could experience damage due to earthquake, from light to heavy failure, such as heavy bending-shear crack near the beam column joint. It is necessary, therefore, to repair the structure adopted good method and workability. The specimens were part of exterior beam-column joint model. Cyclic lateral load was applied to simulate earthquake load. This research used 3 specimens: US-1, the shear damage specimen as the result of first-step loaded test, then are repaired by using 1 layer rectangular galvanized welded wire mesh became R-US.1. US-2, the shear damage specimen as the result of first-step loaded test, then are repaired by using 2 layers rectangular galvanized welded wire mesh became R-US.2. UBB, the bending damage specimen as the result of first-step loaded test, then are repaired by using 2 layers rectangular galvanized welded wire mesh became R-UBB. The result showed that the retrofitted on ultimate load by using jacketing ferrocement increased the ultimate strength capacity of 91,667%(US-1 to R-US.1), 81,818%(US-2 to R.US.2) and 28,571%(UBB to R-UBB) respectively. Increasing the hysteretic energy were 215, 66%(US-1 to R-US.1), 273,11%(US-2 to R.US-2) and 389, 84%(UBB to R-UBB). The ductility of retrofitted specimen 6,64(R-US.1) and 12,72(R-US.2). The initial stiffness of retrofitted specimens decreased 60%(US-1 to R-US.1), 40%(US-2 to R-US.2) and 18%(UBB to R-UBB).
Kuat Geser Tanah Pasir yang Distabilisasi Menggunakan Aspal Cair SC60-70
Authors: Elfira Resti Mulya Willis Diana , 
Published: March 2022

Soil is one of the most important parts in construction work. Soil being found in the field are vary in terms of its properties, and its quality usually does not meet the specified requirements for building construction on it including sandy soil. Sandy soil does not have cohesion value (c), so its shear strength is very low and can lead to collapse. Because of that, it needs to be stabilized to improve the parameter of soil shear strength which are friction angle value (φ) and cohesion value (c). Stabilizing material being used in this research is asphalt, in order to improve cohesion and soil density. Asphalt being used in this research is emulsified asphalt SC 60-70 which is Asphalt Cement (AC) dissolved in diesel oil. In this research, the shear-strength of sandy soil stabilized with emulsified asphalt SC 60-70 was analyzed by means of direct shear-strength testing. It can be concluded from the result that friction angle tends to increase with the increase of the asphalt content. It can also be shown that the lowest friction angle value was found being at 0% asphalt content, 35,753°, while the biggest friction angle value was found being at 5% asphalt content, 38,970° (increased 10,169%).
Audit Keselamatan Jalan pada Jalan Yogyakarta-Purworejo KM 35-40, Kulon Progo, Yogyakarta
Authors: Hardianto R. Mayuna Wahyu Widodo , 
Published: March 2022

Among 2008 until 2010, Polsek Temon Kulon Progo recorded that there are 197 traffic accidents in arterial road which connecting Yogyakarta and Purworejo. Because of the frequent occurence of accidents at that road, it is necessary to analyze the cause of traffic accident. Road Safety Audit is needed to identify the highly-risky situation or the potency of accidents happened.This study used checklists and focused on the answer ‘no’ and also identified the other supporting infrastructures that do not meet the standard and technical requirements. Primary data were obtained from field observations by measuring spot speed and supervising traffic facilities along the way, while the secondary data in the form of traffic accident’s data from 2008 until 2010 were obtained from Polsek Temon. The result showed that from 2008 until 2010 at Yogyakarta-Purworejo road KM 35-40 as many as 197 events occurred with 75 person were seriously injured and another 142 people were lightly injured. The number of accident victims who died were male and the highest number of accident victims under the age of 35 years. Most accidents occured at KM 39, and in the morning (86 events). The cause of the accidents was mostly human (137 events). Pedestrians Accident is as many as 6 cases, and head-on is as many as 14 cases. It is also found that road-shoulders were still used as parking area or selling gasoline, as well as placing some flyers. The absence of special lanes for bicycles or other vehicles such as rickshaws, lack of sidewalks so that pedestrians use the road shoulder as a means of foot walking, shoulder width on the ringth and on the left of the road is not symmetrical, and also the -lack of drainage maintenance caused puddles occurs during the rainy season. Placing of power and telephone poles and lines is quite appropriate, but trees that was on the shoulder of the road still needs to be checked regularly so as not to interfere with the sight-distance of road users.
Studi Kelayakan Investasi Proyek Perumahan pada Proyek Pembangunan Perumahan Aura Tirta Graha Banjarnegara
Authors: Priyo Mandiyo 
Published: March 2022

The aim of this study is to evaluate the cash flow and the feasibility of the building investment project of Perumahan Aura Tirta Graha Banjarnegara. The data used in this study were collected from the contractor. The collected data were classified into two groups: primary and secondary data. The primary data cover the direct detailed examination of the research objectives. The data were collected by doing interview and observation. On the other hand, the secondary data were the historic data dealing with the plan and implementation of the project. In this study, there were several methods carried out in measuring the criterion of investment feasibility, i.e.: Break Event Point (BEP), Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), and Profitability Index (PI). Evaluation results show that every method demonstrated various performance of the investment appropriateness. From the analysis, it can be concluded that the development plan of Perumahan Aura Tirta Graha Banjarnegara has been carefully analyzed and properly implemented.
Unjuk Kerja Resapan Air Hujan
Authors: Barid Burhan , Nugroho Prasetyo Adi , Huda Asri Lutfi 
Published: March 2022

Nowadays, the environmental problems that often occur are flood in wet season and drought in dry season. This happens because the rainwater runoff cannot seep into the ground well and the ground water level is decreased. Excessive surface runoff can be reduced by a simple water infiltration wells on the land. To determine the efficiency of absorption well, a model was created using infiltration rainfall simulator unit to create the condition of heavy rain. This study aims to analyze the relationship between times and several parameters: soil moisture, the changes in the groundwater table, the runoff time, the volume of rainfall infiltration, and to determine the reliability of models with changes in water table. The study was conducted using the infiltration model unit which was made of steel plate with a size of 170x170x200 cm3. This model is divided into three spaces. The first space, which its size is 150x150x200 cm3, has two tests. The first one is labeled as A test and filled with medium silt with the elevation of -150 cm. The B test is filled with medium clay with the elevation of -125 cm. The second space, with the dimension of 170x20x200 cm3, is used to control the ground water level. The third space is used for measuring absorption capability and has dimension of 30x30x100 cm3. This model has nine holes on each side for measuring soil moisture and the 12th hole underneath is used for measuring changes in ground water level. After the artificial rain descended for 120 minutes, soil moisture and ground water level changes measured in every 10 minutes.
Pengeringan Tembakau dengan Sistem Hybrid
Authors: Muhammad Nadjib Dwi Aries Himawanto , 
Published: March 2022

Productivity of tobacco crop may be affected by several factors, one of which is the weather that can influence the tobacco drying process. Providing a customized tobacco dryer may help solving these problems. The study begins by designing a solar energy and biomass (tobacco stem waste) combustion followed by manufacturing and data collection of dryer performance. It can be concluded that the dryer for 140 minutes can reduce the moisture content of fresh tobacco leaves to 64%.
Analisis Pelayanan Penumpang Kereta Api Prambanan Ekspres (Prameks) Trayek Yogyakarta - Solo
Authors: Bambang Dwi Bowo Wisnu Wahyu Widodo , 
Published: March 2022

The aim of this study is to find out the service quality to passenger the train of Prambanan Ekspres (Prameks), passengers perception about the train, and the reason for choosing the train. Data of passenger characteristic and service quality to passengers were collected by using questionnaire distributed to 379 passenger. To analyze the results questioner used Excel. Quality of services provided by PT . KAI is quite satisfactory for the passengers. Prambanan Express The Train is the most desirable public transport for traveling Yogyakarta - Solo, because travel costs are cheaper , practical , safer and more comfortable than any other transport.
Pengaruh Ukuran dan Kedalaman Geotekstil Teranyam Tipe HRX 200 terhadap Daya Dukung Ultimit dan Penurunan Tanah Lempung Lunak
Authors: Budi Kurniawan Thirayo Anita Widianti , Azmania , 
Published: March 2022

Geotextile as one of improvement material in soft clay soil has been widely used. This study aims to examine the effect of geotextile dimention and placement depth on ultimate bearing capacity, settlement and Bearing Capacity Ratio of soft clay soil. This test was conducted on a series of square plate foundation loading of 10 cm width on clay soil sample and installing one layer of geotextile-improvement inside with several dimention variations and geotextile depth. Clay soil is on soft condition taken into a box model made of steel plate with the dimention of 120 cm x 120 cm x 100 cm. The result of this research shows that dimension and depth of geotextile affected the bearing capacity and settlement of soft clay soil. There were improvement in ultimate bearing capacity of as high as 3 times higher for geotextile 3Bx3B; 4 times higher for geotextile 4Bx4B; 5 times higher for geotextile 5Bx5B and 6 times higher for geotextile 6Bx6B comparing with bearing capacity of non supported-clay soil. Decreasing of settlement on clay soil was observed on the 3Bx3B improvement (twice lower), and 3 times lower, 4 times lower and 5 times lower for 4Bx4B, 5Bx5B, 6Bx6B, respectively. Geotextile which placed at a depth of 0.4 B and 0.8 B resulted in increased ultimate bearing capacity by 3.13 times. Dimension and depth geoxtile also affect the value of BCR. The highest BCR was on the dimention 6Bx6B on the depth of 0.6 B.
Pengembangan Energi Panas Bumi yang Berkelanjutan
Authors: Gendut Suprayitno Andiesta El Fandari, Arief Daryanto, 
Published: March 2022

Electricity consumption in Indonesia increases rapidly in line with population growth. Electricity contribute to promote prosperity and public welfare as well as encouraging increased economic activity. Electricity has played an important role as one of the vital infrastructure that has support of political and economic as a priority. These situations make electricity demand continue to rise. On the other hand, electricity production from fossil fuels have not being able to meet high electricity demand. In accordance with government policies to accelerate infrastructure electricity development without ignoring its sustainability then electricity supply is currently focused on renewable energy development. One of renewable energy is geothermal. As the world’s third largest geothermal electricity producer, it is very unfortunate if that great potential from geothermal development and its utilization still not optimal. This article discusses how the sustainable geothermal energy development in Indonesia. Geothermal energy development as one of the renewable energy becomes very important to be discussed related to fossil fuel reserves are finite, price fluctuations in energy which influenced by world economic and political situation and rising levels of greenhouse gas emission from fuel combustion.
Sifat Mekanis dan Struktur Mikro Pengelasan Gesek Baja Tahan Karat Austenitik AISI 304
Authors: Febri Irwanto Aris Widyo Nugroho, Totok Suwanda, 
Published: March 2022

The aim of this study is to investigate experimentally the microstructural properties and welding strengths of the friction welded joints using austenitic stainless steel (AISI 304) base metal. The experiments were carried out using a beforehand designed and constructed experimental friction welding set-up. Firstly, the welding experiments were under different friction pressure (1,38-4,14 MPa) and upsetting pressure (6,90-8,27 MPa). Later, the strengths of the joints were examined by tension test and the results were compared with those of the base metals. Microstructures in the interfaces of the joints were also obtained and examined. The results show that porosities were observed in bondline zone for all specimens. As the friction pressure increased, the fully plastically deformed zone becomes increased. Tensile test results indicated that, generally the joint strength is increased with an increase of the friction pressure and the upsetting pressure. The friction welded joint strenght were found to be lower than that of the base metal. The detailed fractographic observation confirmed that the brittle rupture occurred at the joint zone.
Perancangan Perangkat Lunak untuk Ekstraksi Ciri dan Klasifikasi Pola Batik
Authors: Soesanti Indah 
Published: March 2022

The popularity of batik patterns in Indonesia has varied. Industrial modern devices in imaging have supported batik pattern recognition and classification. The important of product pattern information could not naturally visible. The information about batik pattern can be achieved by using the appropriate software design of image processing for extracting the features. One of the potential procedures is the unsupervised classification method based on specific feature. In this research, the specific feature extraction based on the eigenimage of batik pattern was done. In the final step, the nearest distance eigenimage between reference batik image and test batik image was used to identify the batik from the classical pattern field point of view. The results of batik image identification conformed 96.67% with the reference batik images.