bluuebunny/crossref_metadata_2025 huggingface dataset:
Challenge and Hindrance IS Use Stressors and Appraisals: Explaining Contrarian Associations in Post-Acceptance IS Use Behavior
Authors: Maier Christian ,   Corresponding author, University of Bamberg, Germany, Laumer Sven ,   Friedrich-Alexander Universität Erlangen-Nürnberg, Germany, Tarafdar Monideepa ,   Isenberg School of Management, University of Massachusetts Amherst, USA, Mattke Jens ,   University of Bamberg, Germany, Reis Lea ,   University of Bamberg, Germany, Weitzel Tim ,   University of Bamberg, Germany
Published: March 2022

Post-acceptance IS use is the key to leveraging value from IS investments. However, it also poses many demands on the user. Drawing on the challenge-hindrance stressor framework, this study develops a theory to explain how and why IS use stressors influence post-acceptance use. We identify two different types of IS use stressors: challenge IS use stressors and hindrance IS use stressors. We hypothesize that they are appraised through challenge IS use appraisal and hindrance IS use appraisal, respectively, through which they influence routine use and innovative use. We evaluate our hypotheses by surveying 178 users working in one organization and analyze the data collected using consistent partial least square (PLSc). We find that challenge IS use stressors positively influence routine use and innovative use via challenge IS use appraisal. Hindrance IS use stressors negatively influence routine use via hindrance IS use appraisal. We then dive deeper into these findings using a two-step fuzzy set qualitative comparative analysis (fsQCA), identifying the presence of challenge IS use stressors and challenge IS use appraisal as necessary conditions for high innovative use. We also reveal that the presence of hindrance IS use stressors and hindrance IS use appraisal only influences routine use and innovative use in the absence of challenge IS use stressors and challenge IS use appraisal. We discuss the practical relevance and transferability of our findings based on a comprehensive applicability check. Our findings advance IS scholarship of IS use stress and post-acceptance use by showing how routine use and innovative use emanate from IS use stressors.
A Strategic Group Analysis of Competitor Behavior in Search Advertising
Authors: Nie Cheng ,   Iowa State University, USA, Zheng Zhiqiang (Eric) ,   University of Texas at Dallas, USA, Sarkar Sumit ,   University of Texas at Dallas, USA
Published: March 2022

Firms compete intensely in sponsored search. Their bidding strategies hinge on understanding who competes with whom, how they compete, and how consumers react to competing advertisements. In this context, we investigate how firm competition impacts consumers’ click-through behaviors in search advertising from a strategic group perspective. Using search results from Google and consumers’ clickstream data, we found strong negative externality for competitors within the same strategic group relative to competitors across strategic groups: firms reap fewer click-throughs when an advertisement of another firm from the same strategic group is also displayed in search results, relative to when other displayed advertisers are not from the same group. This indicates that when competitors from the same strategic group are likely to appear in the results of a sponsored search auction, the focal firm would be better off avoiding head-to-head competition in the auction. However, we did not find empirical evidence of such firm behaviors, suggesting myopia or the inability of firms to avoid such competition. We also show that when multiple firms from the same strategic group appear in search results, the closer the focal firm is located to such competing firms, the more click-throughs the firm accrues. This suggests that firms should stay close to their within-group competitors when they compete in the same search auction. Further, our empirical results indicate that firms are indeed doing so. Using another set of data from Google AdWords reports, we show that our findings are also robust to multi-keyword bidding scenarios. These findings represent the first attempt to understand the impact of strategic groups in search advertising and provide interesting implications for advertisers and search engines.
Mining Online Social Networks: Deriving User Preferences through Node Embedding
Authors: Vaghefi Mahyar Sharif ,   College of Business Administration, University of Texas at Arlington, USA, Nazareth Derek L. ,   Lubar School of Business, University of Wisconsin-Milwaukee, USA
Published: March 2022

In the last decade, online social networks have become an integral part of life. These networks play an important role in the dissemination of news, individual communication, disclosure of information, and business operations. Understanding the structure and implications of these networks is of great interest to both academia and industry. However, the unstructured nature of the graphs and the complexity of existing network analysis methods limit the effective analysis of these networks, particularly on a large scale. In this research, we propose a simple but effective node embedding method for the analysis of graphs with a focus on its application in online social networks. Our proposed method not only quantifies social graphs in a structured format but also enables user preference identification, community detection, and link prediction in online social networks. We demonstrate the effectiveness of our approach using a network of Twitter users. The results of this research provide valuable insights for marketing professionals seeking to target personalized content and advertising to individual users as well as social network administrators seeking to improve their platform through recommendation systems and the detection of outliers and anomalies.
Meta-Analysis of the Unified Theory of Acceptance and Use of Technology (UTAUT): Challenging its Validity and Charting a Research Agenda in the Red Ocean
Authors: Blut Markus ,   Durham University Business School, UK, Chong Alain Yee Loong ,   Nottingham University Business School–Ningbo, China, Tsigna Zayyad ,   Nottingham University Business School–Ningbo, China, Venkatesh Viswanath ,   Pamplin College of Business, Virginia Tech, USA
Published: March 2022

There are both formal and informal cries that UTAUT and, by association, the stream of research on technology adoption has reached its limit, with little or no opportunities for new knowledge creation. Such a conclusion is ironic because the theory has not been sufficiently and suitably replicated. It is possible that misspecifications in the various replications, applications, and extensions have led to the incorrect conclusion that UTAUT is more robust than it really is, leaving limited opportunities for future work. Although work on UTAUT has included important variables, predictors, and moderators, absent a faithful use of the original specification, it is impossible to assess the true nature of the effects of the original and additional variables. The present meta-analysis uses 25,619 effect sizes reported by 737,112 users in 1,935 independent samples to address this issue. Consequently, we develop a clear current state-of-the-art and revised UTAUT that extends the original theory with new endogenous mechanisms from different, other theories (i.e., technology compatibility, user education, personal innovativeness, and costs of technology) and new moderating mechanisms to examine the generalizability of UTAUT in different contexts (e.g., technology type and national culture). Based on this revised UTAUT, we present a research agenda that can guide future research on the topic of technology adoption in general and UTAUT in particular.
Inventing Together: The Role of Actor Goals and Platform Affordances in Open Innovation Data-Centric Knowing
Authors: Abhari Kaveh ,   Fowler College of Business, San Diego State University, Davidson Elizabeth J. ,   Shidler College of Business, University of Hawai'i at Manoa, Xiao Bo ,   Shidler College of Business, University of Hawai'i at Manoa
Published: March 2022

With the ubiquity of the internet and social media platforms, open innovation (OI) opportunities now extend to individuals with creative ideas and interests in innovation. Understanding why individuals are willing to engage in open innovation and how their diverse goals affect their participation is important for assessing the viability of various OI models and to inform platform design. In this paper, we develop a theoretical model that examines the impact of three categories of human goals extrinsic, intrinsic, and internalized extrinsic on actors continuous intentions to participate in three general categories of open innovation behaviors: ideation, collaboration, and socialization. The model also considers how perceived platform participation affordances mediate the influence of goals on these innovation behaviors. We validate this goals-affordances-behavior model via a field survey of participants on a social product development (SPD) platform. By theorizing and empirically examining how goals influence participation in the SPD context, our study advances knowledge about open innovation behaviors, provides a foundation for future research across various OI models, and highlights practical insights for OI platform design.
A Test of Protection Motivation Theory in the Information Security Literature: A Meta-Analytic Structural Equation Modeling Approach in Search Advertising
Authors: Mou Jian ,   Pusan National University, Republic of Korea, Cohen Jason ,   University of the Witwatersrand, South Africa, Bhattacherjee Anol ,   University of South Florida, USA, Kim Jongki ,   Pusan National University, Republic of Korea
Published: March 2022

Information security is one of the important domains of information systems research today, with protection motivation theory (PMT) one of its most influential theoretical lenses. However, empirical findings based on PMT are often inconsistent and inconclusive. To reconcile these inconsistent findings, we conducted a meta-analysis to investigate the relationships among PMT constructs while also considering additional contextual constructs that are not specified in PMT. Ninety-two published studies were meta-analyzed and estimated using structural equation modeling. Our results provide support for three of the five predictors of security motivation intention, as postulated by PMT, mixed support for perceived vulnerability, and no support for response cost. We found that coping appraisal variables of response efficacy and self-efficacy have the largest average effects on security behavior. In addition, cultural attributes of collectivism and individualism moderated some of the pairwise correlations, PMT-theoretic relationships were generally stronger in personal contexts than in workplace contexts, and the intention-behavior relationship was strongest in workplace and compliance settings. Our results contribute to the information security literature by providing guidance for future PMT-related research and by demonstrating how meta-analysis and structural equation modeling can be combined to test theories in information systems research.
Effects of angiotensin II receptor blockers on the course of the disease in patients with stable ischemic heart disease
Authors: Kochergina A. M. , Kochergin N. A.
Published: March 2022

Highlights. The review synthesizes the results of clinical studies on the use of sartans. This topic is highly relevant due to the antihypertensive, metabolic and organ-protective effect of sartans, which can positively affect the course of coronary atherosclerosis.

Abstract. Angiotensin II receptor blockers (sartans) are widely used to treat cardiovascular diseases. This class of drugs has antihypertensive and metabolic effects and organ-protective capabilities. Currently, sartans are of high interest due to their pleiotropic effect: improved lipid metabolism, antidiabetogenic action, nephroprotection, and, as a result, reduced total cardiovascular risk. The article presents an overview of clinical data on the use of sartans in patients with ischemic heart disease, the mechanisms of organ-protective effects and prospects of using this class of drugs for total cardiovascular risk reduction. The following data sources were used: e-Library, ClinicalTrials.gov, PubMed, trialbulletin.com, smartpatients.com, BioPortfolio.com.
The possibility of using pharmacological antiarrhythmic therapy and modulated kinesotherapy as a primary prevention of atrial fibrillation in patients with metabolic syndrome and with premature atrial complexes: prospective study
Authors: Olesin A. I. , Konstantinova I. V.
Published: March 2022

Highlights. The results of primary prevention of atrial fibrillation by using antiarrhythmic drug therapy and modulated kinesitherapy in patients with metabolic syndrome with premature atrial complexes are presented.

A significant decrease in the development of the disease was revealed in patients with metabolic syndrome and risk of atrial fibrillation within a year after the examination with the help of pharmacological antiarrhythmic therapy of atrial ectopia and modulated kinesotherapy as primary prevention in comparison with therapy aimed at correcting blood pressure, glucose and blood lipids.

Aim. To assess the possibility of using antiarrhythmic drug therapy (DT) and modulated kinesitherapy (MK)  in patients with metabolic syndrome (MS) and premature atrial complexes (PAC) as the primary prevention of atrial fibrillation (AF).

Methods. 426 MS patients with PAC aged from 58 to 72 years (mean 66.4±0.7 years) were included in the study. All patients had a high probability of developing primary AF within 1 year after the enrollment. Antiarrhythmic DT with class I–III  drugs was used as the primary prophylaxis of AF in 149 (34.97%) patients, MK  – in 121 (28.40%), the correction of blood pressure, glucose and blood lipids – in 156 (36.63%). All patients were followed up for one year and the end point of observation was the maintenance of sinus rhythm or AF registration.

Results. Various clinical forms of AF were recorded in 26.45, 31.54% and 95.51% of patients with MS during primary prevention with the help of pharmacological AAT, UA and correction of its potentially modifiable components (arterial pressure, glucose and blood lipids), respectively, during the year after the examination.

Conclusion. The use of both antiarrhythmic DT of I–III classes, and MК as a primary prophylaxis of AF in patients with MS with PAC and the risk of AF development within one year after the first examination made it possible to reduce the frequency of the arrhythmia by the correction of blood pressure, glucose and blood lipids.
Determinants of arterial hypertension control in the hypertensive population receiving medical therapy
Authors: Kaveshnikov V. S. , Serebryakova V. N. , Trubacheva I. A.
Published: March 2022

Highlights. The leading factor of ineffective arterial hypertension (AH) control in the population taking medications was the number of metabolic risk factors (RF). In addition, in men, the odds of reaching the blood pressure targets were lower if there was a history of kidney disease and bronchitis, and higher, if statins and hypotensive drugs were taken together, respectively. In women, heart rate equal or higher than 75 beats/min and total carotid atherosclerotic plaque thickness were associated with lower and a visit to a physician in the past year - with higher odds of effective hypertension control, respectively.

Aim. Analysis of factors associated with reaching blood pressure targets in hypertensive population taking medications.

Methods. We examined men and women of 25-64 y.o., randomly drawn from general population, having hypertension and receiving medications. All participants underwent standardized cardiac screening, including a survey on a number of socio-demographic, psychosocial, behavioral variables, traditional and metabolic cardiovascular risk factors, life quality. We measured anthropometric and blood pressure variables, "intima-media" thickness, presence and total thickness of carotid atherosclerotic plaques. Analysis included data from 480 respondents. Parametric and nonparametric statistics were used. To analyze relationships, multivariable logistic regression was used. An error probability <5% was considered statistically significant.

Results. After adjustment for age, wealth level, cardio-vascular deseases and the number of antihypertensive drugs, the following factors increased the chances of effective treatment for hypertension in men - statins, positive answer to the question “Do you feel pain or discomfort?” on the EQ5D scale. Lower odds for detecting target blood pressure levels were associated to the count of metabolic syndrome components according to IDF criteria except arterial hypertension (0-4), kidney disease, previous bronchitis, age. A direct association with the effectiveness of treatment for hypertension in women was shown by a visit to the doctor during the past year, and the opposite - the number of metabolic syndrome components, heart rate ≥75 per minute and the total thickness of carotid atherosclerotic plaques, respectively.

Conclusion. Lack of hypertension control was associated to metabolic risk factors count, age, kidney disease, heart rate ≥75 per minute, previous bronchitis, lack of visit to a doctor over the past year, as well as total thickness of carotid atherosclerotic plaques. The situation can be improved by deliberately losing weight, taking statins by all people at very high and high risk, and seeing a doctor regularly. It is necessary to further study the factors that hinder achievement of blood pressure targets, as well as methods aimed at the prevention and effective correction of metabolic disorders.
Map analysis of morbidity and mortality from blood circulatory system diseases of the population of the Russian federation (2010-2019)
Authors: Sharapova O. V. , Kicha D. I. , Gerasimova L. I. , Rukodaynyy O. V. , Fomina R. V. , Evzerikhina A. V. , Barsukova E. V.
Published: March 2022

Highlights. For the first time, mapping models of morbidity and mortality from the blood circulation system diseases for assessing the performance of the health protection system in federal districts of the Russian Federation were proposed. The method makes it possible to identify low-quality health systems, and outsider regions, where it is necessary to develop measures in order to identify modifiable and non-modifiable risk factors and improve the performance of health care system both in federal districts and in the Russian Federation as a whole.

Aim. To develop mapping models of morbidity and mortality from the blood circulation system diseases (BCSD) and to propose indices for assessing the performance of the health care system in different federal districts of Russia over a 10-year period (from 2010 to 2019).

Methods. Reporting forms of federal statistical observation in the field of public health were used.

Results. The incidence of BCSD among the population of the Russian Federation has been steadily increasing over the past two decades, increasing 2.047-fold from 2000 to 2019, while the mortality rate of the Russian population decreased 2.073-fold over the same period. Mapping models of morbidity and mortality from BCSD have been developed and indices for assessing the performance of the health protection system in different federal districts of Russia over a 10-year period (from 2010 to 2019) have been proposed.

Conclusion. The mapping of low and ultra-low incidence rates of BCSD combined with high and ultra-high mortality rates from BSC among the population of the federal districts indicates low detection rates and low performance of the primary health care system in detecting BSC among the population assigned to receive primary health care according to the territorial principle. The correlation of indicators of general morbidity and mortality from HIPC in relation to health care resources allows timely assessment and finding resources in those areas that contribute to the maximum efficiency of medical organizations at minimum cost.
Comparison of classifications and justification of the need for transdisciplinary consensus to take into account the prevalence and mortality associated with chronic heart failure
Authors: Samorodskaya I. V. , Larina V. N. , Chernyavskaya T. K. , Kakorina E. P.
Published: March 2022

A significant number of studies on chronic heart failure (CHF) are published worldwide. However, the issue of uniform criteria and approaches to accounting for ambulatory care and mortality associated with this pathology in patient accounting systems has remained resolved, meaning the data and indicators obtained in different regions and countries are not comparable. The aim of the article is to substantiate the need for discussion in the Russian Society of Cardiology on the possibility, principles and methodology of uniform accounting of ambulatory care, hospitalizations and deaths associated with chronic heart failure in healthcare using the classifications of heart failure applied in clinical practice.
Antithrombotic therapy in patients with atrial fibrillation after percutaneous coronary interventions
Authors: Krestyaninov O. V. , Badoian A. G. , Naydenov R. A. , Baystrukov V. I.
Published: March 2022

Highlights. The article analyzes the current evidence base for anticoagulant and antiplatelet therapy in patients with atrial fibrillation undergoing percutaneous coronary interventions, and future perspectives of such therapy.

Abstract. A number of patients undergoing percutaneous coronary intervention may require intensification of antithrombotic therapy. These include patients with atrial fibrillation. The difficulty of treatment of this group of patients consists in the achievement of a certain level of hypocoagulation, which will be sufficient for the prevention of acute ischemic events, mainly associated with the implanted coronary stent, but will not lead to the clinically relevant bleeding. Achieving this balance requires a careful and personalized approach to prescribing a variety of combination (antiplatelet and anticoagulant) therapy regimens. The article provides an overview of modern antithrombotic therapy regimens in this group of patients, their evidence base and promising directions for improving such therapy.
PENGARUH TINGGI BADAN DAN TINGGI MOBIL TERHADAP KELELAHAN KERJA KARYAWAN CUCI MOBIL DI BENGKEL RESMI KOTA MALANG
Authors: Tricahyo Bayu Hendri Mardian , Marji Marji , Partono Partono
Published: March 2022

Tujuan penelitian adalah: 1) Mengetahui pengaruh tinggi badan terhadap kelelahan kerja karyawan cuci mobil di bengkerl resmi, 2) Mengetahui pengaruh tinggi badan dan tinggi mobil terhadap kelelahan kerja karyawan cuci mobil di bengkel, 3) Mengetahui pengaruh tinggi mobil terhadap kelelahan kerja karyawan cuci mobil di bengkel resmi. Data dikumpulakan melalui observasi dan kuisoner, dianalisis mengunakan regresi linier berganda. Hasil penelitian adalah Tinggi badan, Tinggi mobil berpengaruh terhdap kelelahan kerja karyawan cuci mobil dibengkel resmi di kota Malang.
PEMANFAATAN QUIPPER SCHOOL BERBASIS BLENDED LEARNING TERHADAP HASIL BELAJAR PADA KOMPETENSI MENERAPKAN CARA PERAWATAN DIFFERENTIAL DI KELAS X TKR SMK PGRI 3 MALANG
Authors: Zahro Awalia Habibatuz , Poerwanto Eko Edi , Putra Andika Bagus Nur Rahma , Partono Partono
Published: March 2022

Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa dengan menggunakan Quipper School. Jenis penelitian merupakan penelitian kuantitatif jenis eksperimental semu dengan pre-test dan post-test.  Instrumen yang digunakan adalah instrumen pembelajaran berupa Rencana Pelaksanaan Pembelajaran (RPP).. Analisis data dengan uji Independent Sample T Test. Hasil Penelitian menunjukkan bahwa Quipper School memiliki beberapa kelebihan untuk membantu proses pembelajaran, media Quipper School yang dihasilkan berbasis bleanded learning dan dapat meningkatkan hasil belajar siswa, dan pemanfaatan Quipper School lebih efektif dalam meningkatkan hasil belajar siswa pada kompetensi menerapkan cara perawatan differential di kelas X TKRO SMK PGRI 3 Malang dibandingkan dengan media slide presentasi.
PENGARUH PENAMBAHAN ZAT ADITIF MINYAK CENGKEH PADA BAHAN BAKAR BENSIN OKTAN 90 TERHADAP EMISI GAS BUANG DAN DAYA MESIN VARIO PGM-FI 150CC
Authors: Putra Emdi Ramadana , Sholah Agus , Mindarta Erwin Komara
Published: March 2022

Penelitian ini bertujuan untuk mengetahui perngaruh penambahan zat aditif minyak cengkeh pada bahan bakar bensin oktan 90 terhadap emisi gas buang dan daya mesin  vario PGM-FI 150cc. Rancangan penelitian yang digunakan dalam penelitian ini adalah kuasi eksperimen dengan desain Randomized Control-Group Only. Berdasarkan analisis data, didapatkan bahwa nilai signifikansi hasil uji hipotesis menunjukkan angka 0,000 yang artinya nilai signifikansi < 0,05. Sehingga, disimpulkan bahwa ada perngaruh penambahan zat aditif minyak cengkeh pada bahan bakar bensin oktan 90 terhadap emisi gas buang dan daya mesin  vario PGM-FI 150cc.
PENGEMBANGAN ALAT PENDETEKSI KERUSAKAN BEARING RODA BERBASIS MIKROKONTROLER ARDUINO UNO R3 DENGAN SENSOR GETARAN PIEZOELEKTRIK
Authors: Kristanto Diky Meirico , Nauri Imam Muda , Ihwanudin Muhammad
Published: March 2022

Perkembangan di dunia otomotif sekarang ini semakin lama semakin  berkembang dengan pesat. Para pemilik industri kendaraan saling memberikan kualitas kendaraan yang aman dan nyaman bagi para pengendaranya. Keselamatan  pengendara juga sangat perhatikan saat melakukan perjalanan., pada kendaraan terdapatkomponen yang diam dan bergerak yang akan dihubungkan dengan bantalan atau sering di sebut bearing, bearing berfungsi untuk membatasi gerak relatif antara dua atau lebih komponen mesin agar selalu bergerak pada arah yang diinginkan. Salah  satu  yang  harus  dicermati  pada  kondisi kendaraan  adalah  gejala  kerusakan pada  bearing roda tersebut. Dalam perawatan dan pemeriksaan bearing kendaraan biasanya para mekanik hanya mengandalkan indra pendengaran yang mana dituntut kepekaannya dan membutuhkan waktu lama untuk menemukan bearing roda sisi man yang mengalami kerusakan. Seiiring perkembangan elektronika maka dikembangkannya mikrokontroler untuk memaksimalkan proses pemeriksaan pada bearing yang mengalami kerusakan, mikrokontroler yang digunakan adalah Arduino UNO R3 dan dikombinasikan dengan sensor getaran piezeolektrik untuk pembacaan getaran yang dihasilkan pada bearing yang mengalami kerusakan.
PENGARUH VARIASI IGNITION TIMING MENGGUNAKAN ECU PROGRAMMABLE TERHADAP PERFORMA MESIN PADA SEPEDA MOTOR 150CC SOHC BERPENDINGIN AIR
Authors: Rahmaddaani Maulana , Poerwanto Eko Edi , Irdianto Windra
Published: March 2022

Penelitian ini dilakukan untuk mengetahui perbedaan daya dan torsi yang dihasilkan dari sepeda motor 150CC SOHC berpendingin air antara yang menggunakan ignition timing 5O, 6O,dan 7O. Pada rancangan penelitian ini menggunakan metode eksperimental dengan teknik analisis data one-way anova. Subjek dalam penelitian ini adalah Yamaha New Vixion.Dari hasil penelitian yang telah dilakukan adalah sebagai berikut:1) daya yang tercapai ignition timing 5O sebesar 15,93HP, selanjutnya saat dimajukan pada ignition timing 6O sebesar 16,98HP,dan saat dimajukan lagi pada ignition timing 7O daya mengalami penurunan menjadi 16,38HP. Daya tersebut terdapat pada puncaknya di 8500 RPM 2) torsi yang tercapai ignition timing 5O sebesar 14,22NM, selanjutnya saat dimajukan pada ignition timing 6O sebesar 14,94NM , dan saat dimajukan lagi pada ignition timing 7O torsi mengalami penurunan menjadi 14,6NM. Torsi tersebut berada pada puncaknya di 7500 RPM. Dari hasil penelitian ini dapat diambil kesimpulan apabila melakukan perubahan di bagian ignition timing.
PENGARUH VARIASI CLEARANCE PRIMARY PULLEY TERHADAP DAYA, TORSI DAN KONSUMSI BAHAN BAKAR PADA SEPEDA MOTOR MATIC 150CC
Authors: Uthama Chesyar Bhima Aprillian Dartin P. , Sumarli Sumarli , Putra Andika Bagus Nur Rahma
Published: March 2022

Penelitian ini bertujuan mengetahui pengaruh daya, torsi dan konsumsi bahan bakar pada sepeda montor matic Honda VARIO 150 cc melalui variasi clearance primary pulley. Metode penelitian yang digunakan adalah Eksperimen Semu dengan model disain Randomized kontrol-grup only design. Berdasarkan hasil analisis data daya dihasilkan nilai signifikansi 0,008. Pada pengujian torsi didapatkan nilai signifikansi sebesar 0,015. Pada pengujian konsumsi bahan bakar didapatkan nilai signifikansi sebesar 0,027. Dengan demikian hasil analisis data melihatkan bahwasanya nilai signifikansi <0,05, maka ditarik kesimpulan ada pengaruh yang signifikan variasi clearance primary pulley terhadap daya, torsi dan konsumsi bahan bakar. Hasil pengujian menunjukkan clearance primary pulley 33mm memiliki daya dan torsi tertinggi dan konsumsi bahan bakar terendah pada kecepatan 80 km/h dan 100 km/h.
PENGARUH STROKE UP TERHADAP DAYA, KONSUMSI BAHAN BAKAR DAN EMISI GAS BUANG PADA SEPEDA MOTOR HONDA MEGA PRO
Authors: Mutaqin Muhammad Faza , Partono Partono , Poerwanto Eko Edi
Published: March 2022

Penelitian ini untuk mengetahui pengaruh penggunaan metode stroke up dengan besar perubahan 3,5 mm dan 7 mm pengaruh yang di cari adalah daya, konsumsi bahan bakar dan emisi gas buang. Penelitian ini dilakukan dengan metode kuasi eksperimen dengan variable terikat adalah daya, emisi gas buang dan konsumsi bahan bakar seta variable bebasnya adalah stroke up 3,5 mm dan 7mm. Data diambil sebanyak 3 kali pada setiap perubahan variable dan selanjutnya diambil rata–rata pada putaran idle sampai dengan putaran limit, dari hasil penelitian terdapat perbedaan daya antara mesin standar, mesin stroke up 3,5 mm dan mesin dengan stroke up 7 mm, dengan daya maksimal mesin standar menghasilkan 13.63 HP pada putaran 10.000, stroke up 3,5 mm menghasilkan 14.58 HP pada putaran 9000 dan stroke up 7 mm menghasilkan 15.37 HP pada putaran 9000, terdapat perbedaan konsumsi bahan bakar. Mesin stroke up lebih tinggi jika menggunakan sistem suplai bahan bakar standar mengakibatkan mesin memiliki rasio pembakaran yang miskin, walaupun dari hasil pengukuran CO menunjukkan hasil yang baik namun karena campuran udara dan bahan bakar terlalu miskin yaitu produksi NOx semakin tinggi dan mesin lebih cepat panas. Untuk emisi gas buang HC cenderung mengalami penurunan jika stroke up semakin tinggi.
PENGGUNAAN MODEL JIGSAW DALAM PEMBELAJARAN MATERI PEMELIHARAAN SASIS SEPEDA MOTOR UNTUK MENINGKATKAN PRESTASI BELAJAR SISWA KELAS XI TEKNIK BISNIS SEPEDA MOTOR DI SMKN 1 PAKONG
Authors: Alimi Moh. Nanang , Sholah Agus , Ihwanudin Muhammad
Published: March 2022

Model pembelajaran yang digunakan di SMKN 1 Pakong tidak sesuai dengan pembelajaran kurikulum 2013 yang membebankan siswa lebih aktif daripada seorang guru. Salah satu Model pembelajaran yang selaras dengan kurikulum 2013 adalah model pembelajaran jigsaw. Siswa belajar bukan hanya mendegarkan secara teori namun pada model pembelajaran jigsaw siswa dituntut lebih aktif dalam proses pembelajaran. Penelitian ini tergolong pada penelitian eksperimen semu (quasi-experimental design). Dengan rancangan kelompok non-ekivalen. Desain kelompok kontrol non-ekivalen melibatkan dua kelompok yang subjeknya sama, desain kelompok kontrol non-ekuivalen memiliki banyak kesamaan dengan desain kelompok yang tidak diberikan perlakuan, perbedaanya hanya pada pengambilan subjeknya. Teknik pengumpulan data dilakukan melalui 2 tahap yaitu tes awal (pretest) dan tes akhir (Posttest). Uji normalitas untuk mengetahui data terdistribusi normal atau tidak dengan uji One Sample Kolmogoruv-Smirnov Test dengan menggunkan SPSS. Untuk pengujian homogenitas diuji F dengan menggunkan program SPSS. Penelitian ini menghasilkan kesimpulan bahwa Prestasi belajar siswa pemeliharaan sasis sepeda motor siswa kelompok siswa yang berkemampuan awalnya tinggi lebih unggul dari pada kelompok siswa yang berkemampuan awal sedang, dan rendah.
PENGARUH PERUBAHAN PANJANG ALUR ROLLER TERHADAP DAYA DAN AKSELERASI PADA SEPEDA MOTOR MATIC 125 CC CBS ISS
Authors: Pangestu Wiyan Dwi , Nauri Imam Muda , Mindarta Erwin Komara
Published: March 2022

Penelitian ini bertujuan untuk mengetahui apakah ada pengaruh dari perubahan panjang alur roller terhadap daya dan akselerasi pada sepeda motor Honda Vario 125 cc PGM-FI CBS ISS. Pendekatan penelitian yang digunakan dalam penelitian ini adalah pendekatan penelitian kuantitatif dengan desain quasi-experiment yang melibatkan variabel bebas dan variabel terikat. Berdasarkan hasil penelitian ini daya yang dihasilkan oleh primary pulley standard pada putaran rpm 8000 ialah sebesar 10,281 HP sedangkan dengan menggunakan primary pulley yang sudah di custom menghasilkan daya sebesar 10,905 HP. Sementara untuk akselerasi kendaraan yang dihasilkan ketika menggunakan primary pulley standard dari kecepatan 0-100 km/jam ditempuh dengan percepatan 2,05 m/  sedangkan untuk primary pulley custom dengan kecepatan yang sama ditempuh dengan percepatan 2,09 m/ . Dengan demikian perubahan panjang alur roller ini tidak menghasilkan perbedaan daya dan akselerasi yang signifikan.
PERBEDAAN PENGGUNAAN IGNITION COIL STANDAR DAN RACING DILENGKAPI DENGAN CAPASITOR TERHADAP DAYA DAN EMISI GAS BUANG PADA SEPEDA MOTOR 110 CC ESP
Authors: Krissensen Itok Endirga , Harly Muchammad , Paryono Paryono
Published: March 2022

Penelitian bertujuan untuk 1) mengetahui perbedaan daya yang dihasilkan oleh mesin a)dengan menggunakan coil standar tanpa pemasangan capasitor b)dengan menggunakan coil racing tanpa pemasangan capasitor c)dengan menggunakan coil standar dengan pemasangan capasitor d)dengan menggunakan coil racing dengan pemasangan capasitor dan 2)mengetahui perbedaan emisi gas buang karbonmonoksida (CO) dan hidrokarbon (HC) a)dengan menggunakan coil standar tanpa pemasangan capasitor b)dengan menggunakan coil racing tanpa pemasangan capasitor c)dengan menggunakan coil standar dengan pemasangan capasitor d)dengan menggunakan coil racing dengan pemasangan capasitor. Hasil penelitian yang telah dilakukan ini diharpakan dapat sebagai dasar pengembangan coil pengapian dan selain itu dapat digunakan sebagai kajian pustaka pada bidang dunia otomotif. Penelitian ini menggunakan uji analisis Two Way Anova dengan prasyarat, data telah diuji normalitas dan homogenitas. Analisis yang dilakukan meliputi penjelasan tentang variasi igniton coil dengan penambahan capasitor dan tanpa penambahan capasitor terhadap daya dan emisi gas buang. Pengujian daya dilakukan di AHASS Asia Motor Pakisaji, sedangkan uji emisi gas buang dilakukan di SMK Negeri 1 Blitar. Untuk uji daya dan emisi gas buang dilakukan pada putaran mesin 3000-7500 RPM dengan kelipatan 500 dengan pengulangan pengujian sebanyak 4 kali. Hasil dari penelitian ini adalah terdapat perbedaan penggunaan ignition coil standar dan racing dilengkapi dengan capasitor terhadap daya dan emisi gas buang pada sepeda motor 110 cc esp.
STUDI TENTANG KEBERADAAN SARANA DAN PRASARANA BENGKEL TEKNIK KENDARAAN RINGAN DI SMKN 2 PASURUAN
Authors: Cahyono Andik , Sholah Agus , Partono Partono
Published: March 2022

SMK adalah salah satu lembaga yang mempunyai tujuan untuk mencipakan sumber daya manusia yang terampil dalam bidangnya masing masing. Penelitian ini bertujuan untuk menngetahui tingkat kelayakan sarana dan prasarana bengkel Teknik Kendaraan Ringan SMK Negeri 2 Pasuruan ditinjau dari Permendiknas No. 40 Tahun 2008. Rancangan penelitian menggunakan metode pendekatan kuantitatif deskriptif. Pengambilan data dilakukan dengan wawancara dan observasi lapangan. Subjek dalam penelitian ini adalah semua sarana dan prasarana yang ada di bengkel teknik kendaraan ringan SMK Negeri 2 Pasuruan. Hasil penelitian menyetakan kelayakan sarana sebagai berikut : Perabotan termasuk dalam kategori layak. Peralatan termasuk dalam kategori layak. Media Pendidikan Termasuk dalam kategori layak. Perlengkapan Lain termasuk dalam kategori layak. Kalayakan prasarana sebagai berikut : Ruang kerja mesin termasuk dalam kategori layak. Ruang kerja kelistrikan termasuk dalam kategori layak. Ruang kerja chasis dan pemindah tenaga termasuk dalam kategori layak. Ruang penyimpanan dan isntruktur termasuk dalam kategori layak.
PENGEMBANGAN MEDIA PEMBELAJARAN E-LEARNINGBERBASIS EDMODOPADA KOMPETENSI DASARPEMELIHARAAN UNIT FINAL DRIVE UNTUK SISWA KELAS XI SMK ISLAM “PANCA HIDAYAH” TULUNGAGUNG
Authors: Nasuha Dyan Sadham , Suhartadi Syarif , Sumarli Sumarli
Published: March 2022

Penelitian ini merupakan penelitian pengembangan (research and development/R&D) yang menggunakan desain Sugiyono. Terdapat 10 langkah pengembangan model ini, yaitu: (1) Mengidentifikasi Kebutuhan, (2) Pengumpulan Data, (3) Desain Produk, (4) Validasi Desain, (5) Revisi Desain, (6) Validasi Produk, (7) Revisi Produk, (8) Ujicoba Lapangan, (9) Revisi Produk, (10) Produksi Massal. Instrumen pengumpulan data menggunakan angket yang disebarkan kepada ahli materi, ahli media, kelompok kecil dengan 6 responden (siswa), dan uji lapangan dengan 25 responden (siswa).
PENGARUH TEMPERATUR AIR YANG DIDINGINKAN AC DAN TEMPERATUR AIR RADIATOR TERHADAP OUTPUT DAYA THERMOELECTRIC GENERATOR
Authors: Pranoto Asep , Nauri Imam Muda , Sumarli Sumarli
Published: March 2022

Penelitian ini bertujuan untuk mengetahui pengaruh beda temperatur air yang didinginkan AC dan temperatur air radiator terhadap output daya thermoelectric generator. Penelitian ini menggunakan metode eksperimental pada 12 buah thermoelectric generator yang dirangkai seri, dipasang pada mesin Honda Jazz i-VTEC. Air radiator dengan temperatur 80-90  sebagai pemanas thermoelectric dan air yang didinginkan AC dengan temperatur 17-27  sebagai pendingin. Hasil penelitian didapatkan beda temperatur minimum 53  menghasilkan 0,0007 Ampere, 2,52 Volt dan 1,764 miliWatt. Kemudian dengan beda temperatur maksimum 73  menghasilkan 0,00246 Ampere, 4,35 Volt dan 10,701 miliWatt. Kesimpulan penelitian ini yaitu ada pengaruh beda temperatur terhadap output daya thermoelectric generator.
PENGARUH PERBEDAAN TEKANAN BAHAN BAKAR TERHADAP DAYA DAN EFISIENSI BAHAN BAKAR PADA SEPEDA MOTOR AUTOMATIC 110 CC FUEL INJECTION
Authors: Afrikhudin Denny , Sumarli Sumarli , Mindarta Erwin Komara
Published: March 2022

Daya merupakan salah satu parameter dalam menentukan performa motor. Efisiensi bahaan bakar adalah bayaknya bahan bakar yang dipakai selama proses pembakaran berlangsung. Penelitian ini menggunakan metode kuantitatif. Rancangan penelitian ini menggunakan desain penelitian perbandingan kelompok statis. Subyek dalam penelitian ini yaitu, perbedaan tekanan bahan bakar dan obyek dalam penelitian ini adalah sepeda motor automatic 110cc fuel injection. Metode pengumpulan data menggunakan instrument dokumentasi dan tes. Penelitian ini menggunakan analisis satu arah (0ne Way Anova). Berdasarkan hasil analisis data diperoleh pertama pengaruh perbedaan tekanan bahan bakar terhadap daya pada sepeda motor automatic 110cc fuel injection terdapat perbedaan signifikan antara tekanan bahan bakar standar, tekanan bahan bakar ditingkatkan, dan tekanan bahan bakar diturunkan terhadap daya mesin, yang kedua pengaruh perbedaan tekanen bahan bakas terhadap efisiensi bahen baker pada sepeda motorr automatic 110cc fuel injection terdapat perbedaan signifikan antara tekanan bahan bakar standar, tekanan bahan bakar ditingkatkan, dan tekanan bahan bakar diturunkan terhadap efisiensi bahan bakar. Dari hasil penelitian dapat disimpulkan bahwa perbedaan tekanan bahan bakar dapat mempengaruhi daya sepeda motor automatic 110cc fuel injection, dan perbedaan tekanan bahan bakar dapat mempengaruhi efisiensi bahan bakar sepeda motor automatic 110cc fuel injection.
PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH (PROBLEM BASED LEARNING) TERHADAP HASIL BELAJAR SISWA PADA KOMPETENSI PERAWATAN SISTEM BAHAN BAKAR BENSIN INJEKSI DI SMKN 11 KOTA MALANG
Authors: Rofi’i Muhamad Irfan , Suhartadi Syarif , Partono Partono
Published: March 2022

Penelitian ini bertujuan untuk mengetahui pengaruh pembelajaran berbasis masalah terhadap hasil belajar mata pelajaran pmkr pada kompetensi perawatan sistem bahan bakar bensin injeksi. Penelitian ini menggunakan instrumen tes pilihan ganda dengan jumlah soal 20 butir. Penelitian ini merupakan penelitian eksperimen semu. Jenis desain penelitian yang digunakan adalah desain control group posttest. Subjek penelitian dalam penelitian ini adalah seluruh siswa kelas XI Teknik Kendaraan Ringan SMKN 11 Malang semester ganjil tahun pelajaran 2020/2021. Metode pengambilan data yang digunakan adalah tes, dan dokumentasi. Berdasarkan hasil kajian penelitian, dapat disimpulkan bahwa terdapat pengaruh model pembelajaran berbasis masalah (problem based learning) terhadap hasil belajar siswa pada kompetensi perawatan sistem bahan bakar bensin injeksi kelas XI teknik kendaraan ringan SMKN 11 Kota Malang dengan nilai regresi sederhana 0,00 > 0,05.
PENGARUH PEMAHAMAN TENTANG KOMPETENSI PROFESIONAL TERHADAP KINERJA GURU DI SMKN 12 MALANG
Authors: Priyono Muhhamad Yanuar Ramadhani , Partono Partono , Kusuma Fuad Indra
Published: March 2022

Penulis melakukan pengkajian ini bertujuan untuk memahami pengaruh dari skill profesionalitas guru terhadap kinerja guru di SMKN 12 Malang. Penulis menggunakan kajian deskripstif dengan metode angka kuantitas. Komunitas pada penulisan naskah ini yaitu seluruh tenaga pengajar SMKN 12 Malang yang berjumlah 60 orang. Cara pengumpulan bahan penelitian yaitu dengan cara daftar pertanyaan, pemilihan, dan pengamatan. Analisis data yang digunakan oleh penulis yaitu analisis deskripstif, dan regresi linier sederhana. Penelitan ini menghasilkan pegaruh yang signifikan dengan nilai 0,000<0,05, serta koefisien determinasi sebesar 0,598 atau sebesar 59,8%.
Analisis Kelongsoran Lereng Akibat Pengaruh Tekanan Air Pori di Saluran Induk Kalibawang Kulonprogo
Authors: Subiyanti Hesti , Rifa’i Ahmad , Jayadi Rachmad
Published: March 2022

During rainy seasons, landslide occurs every year in Talang Bawong, Kalibawang Irrigation Channel thatcan damage houses, school building, bridge and the channel. Considering this fact, a numerical analysis by modeling the slope at the site was conducted. The objectives of this research were to identify the rain characteristic in the research site and to recognize its influence towards the change of water pressure in soil as well as the slope failure. The input data of this analysis were slope topography, physical and mechanical properties of soil applied. Groundwater flow in the slope model was numerically simulated by using SEEP/W software. Designed rainfall with appropriate return period was determined by analizing the maximum daily rainfall data with the aid of HAVARA software, while rainfall depth distribution was completed by applying frequency analysis. The historical daily rainfall data (1985 – 2004) were obtained from Kalibawang rain stasiun. Six rainfall models, as follow: initial condition (no rain) (model I), heavy rain in a short duration (model II), normal rain 25 mm and 40 mm in a long duration (model III), normal rain 20 mm in a long duration (model IV), heavy rain followed by normal rain 20 mm (model V), and normal rain 20 mm followed by heavy rain (model VI) Were analyzed. The output of the simulation was water pressure distribution data, which in turn being used as input data in analyzing slope stability using the SLOPE/W software. The result of the research showed that the highest rainfall with 2-year-return period was 114 mm while the dominant duration was 4 hours/day, and it was applied in the model II. The result showed that, a normal rain in a long duration is more severely influenced the change in water pressure than a heavy rain in a short duration. The safety factors are 1,444 for no rain condition, 1,418 for 114 mm rain for 4 hours, 1,208 for 25 mm and 40 mm rains, 0,982 for 20 mm rain, 1,397 for heavy rain followed by normal rain, and 1,402 for normal rain followed by heavy rain. In addition, a 20 mm normal rain on the 61st  day resulted in the most severe influence on the slope failure.
The Analysis of CO2 Emission Reduction Scenarios in Industry Sector of Yogyakarta Province of Indonesia
Authors: Al Hasibi Rahmat Adiprasetya
Published: March 2022

The final energy demand and energy-related CO2 emission in industrial sector of Yogyakarta Province were analyzed in this study. The potential of energy saving and reduction of CO2 emission were estimated. The analysis was based on energy model. The model was constructed by LEAP model that describe the pattern of energy demand in industrial sector. Energy modeling and scenario analysis were used to simulate the impacts of various policies in energy demand and CO2 emission. Three scenarios were implemented in the model. Initially, the model was developed under business as usual (BAU) scenario that include current situation of energy-related activity in industrial sector. 2008 was selected as base year with projection period was terminated in 2025. Then, two alternative scenarios were developed that focus on energy efficiency improvement (EE scenario) and fuel switching to cleaner fuel (FS scenario). The two alternative scenarios were integrated into mitigation scenario. The result of alternative and mitigation scenario compare to BAU scenario in term of the final energy demand and energy-related CO2 emission. The result of the model showed the potential of energy saving by implementing mitigation scenario is 24.16% compare to BAU scenario. The expected reduction of CO2 emission under mitigation scenario is 20.22% compare to BAU scenario.
Perilaku Lentur pada Keadaan Layan dan Batas Balok Beton Bertulang Berlubang Memanjang
Authors: Bambang Supriyadi M. Yusuf Amir , Djoko Sulistyo ,
Published: March 2022

I cross-section of reinforced concrete with reduced weight and concrete needs (in-complete sentence), but the reduction in strength is not considerably large. The implementation of I cross-section reinforced concrete beams is quite complicated and time consuming. This research was conducted to evaluate and compare the flexural behavior and the dynamic effects of a elongated hollow square beam that equivalent with a I cross-section beam. The specimens used in 4 (four) pieces of span 3500 mm, namely each one (1) beam control (BK) in the form of T beams with flange face down and 3 (three) beams with holes (BB1, BB2 and BB3) beam T looks like a hole in the geometry and materials together with 300 mm height, width and height of flange of 600 mm and 100 mm to 125 mm wide body BK BB 200 mm in width and height while the bottom flange BK 200 mm and 75 mm. Each specimen was statically loaded until failure, and dynamically loaded up to yielding occured using a vibrator machine. It was revealed that whilst both BK and BB capacity in terms of flexural strength is not significantly different, i.e. 2.03% for BB1, 2.49% for BB2 and BB3, and 3.96% for BK; for the flexural stiffness of the experimental results in a row BB1 -62.88% -63.58% BB2, and BB3 -22.70% to BK whereas the ductility consecutive BB1 4.699; BB2 2.094; BB3 2.225; 2.102 against BK. BK test beam that is equivalent to BB either does not guarantee the material and dimensions have the same natural frequencies for the system of joint-roller beam placement BB has a higher natural frequency with an increase of 14.061% compared to BK and placement system joints BB has a natural frequency higher with an increase of 10.145% compared to BK. For BK and BB crack pattern begins in the mid-span and the maximum load at failure crack pattern of flexural failure.