bluuebunny/crossref_metadata_2025_split huggingface dataset:
OPTIMIZING THE MODES OF COMPRESSOR STATIONS UNDER THE CONDITIONS OF THEIR PARTIAL LOAD
Authors: Kryzhanivskyy Ye. I. , Grudz V. Ya. , Grudz (jun.) V. Ya. , Tereshchenko R. B. , Govdjak R. M. 
Published: August 2019

The principle of construction of stochastic and deterministic mathematical models for prediction of operating modes of gas pumping units at compressor stations of main gas pipelines and their optimization in conditions of incomplete loading of the gas transmission system is proposed. Calculation of the parameters of the technological mode of operation of the compressor stations of gas pumping units is based on the use of combined characteristics of centrifugal superchargers, the processing of which by means of mathematical statistics allowed to obtain analytical expressions for the characteristics models. The calculation method can be implemented for forecasting the operation modes of the compressor station in conditions of both single-stage and multi-stage compression of gas. The source data for the calculation comprise the upstream and downstream pressure and temperature of gas, the volume of pumping and physical properties of the gas. In order to predict operating modes of compressor stations, the optimal distribution of load between workshops equipped with multi-type gas-pumping units is carried out provided that the energy consumption is reduced to compress the given volume of gas under known boundary conditions. The principle of constructing an optimality criterion for conditions of incomplete loading of the gas transmission system is shown.
To illustrate the proposed method of optimizing the operation modes of compressor stations under incomplete loading, we give an example of the calculation of optimal operating modes of a hypothetical two-seater compressor station with various types of aggregates. The calculation is based on the construction of analytical mathematical models of their characteristics on the criterion of minimum capacity for gas compression at a given output and upstream and down stream pressures at the station.
ANALYSIS OF OPERATION OF INTERNAL COMBUSTION ENGINES WORKING ONE BIOGAS FROM THE LANDFILL WASTES
Authors: Dykun T. V. , Haieva L. I. , Kozak F. V. , Demianchuk Ya. M. 
Published: August 2019

The problem of the effective use of traditional energy sources and the search for alternative resources is currently urgent. Today, in Ukraine, the low-calorie gas potential, which in large quantities is formed in landfills from solid household wastes, in particular biogas, is almost not used. The number of existing domestic installations for the disposal of this gas is insignificant. Today, this valuable resource in quantities of up to 1 billion cubic meters per year is emitted into the atmosphere contaminating it, or burned in flares. Rarely biogas is used in automotive internal combustion engines. However, replacing gasoline with biogas results in reduction in engine power and an increase in fuel consumption. Knowing the component composition of biogas, one can calculate the heat of its combustion and the heat of combustion of gas-air mixtures.
According to the results of analytical studies, the graphic dependences of the change in effective power, torque and the effective specific biogas flow rate on engine revolutions were constructed and a comparison of these values with those of a petrol engine was performed. Dependencies show that the use of biogas as a fuel for the ICE leads to a significant reduction of the above parameters: in particular, the effective power decreases to 20%, torque to 22%, and the specific effective fuel consumption increases by 170%. However, due to the low cost of this type of automobile fuel and the considerable resource base for its obtaining in Ukraine, one can conclude - the use of biogas from landfills should be expanded and this is promising, in terms of energy independence of both separate economic entities and the state as a whole.
Correlation between the Oswestry Disability Index and the 4-item short forms for physical function and pain interference from PROMIS
Authors: Yee Timothy J. , Smith Brandon W. , Joseph Jacob R. , Saadeh Yamaan S. , Nathan Jay K. , Kahn Elyne N. , Khalsa Siri S. , Fearer Kelsey J. , Kirsch Michael J. , Nerenz David R. , Chang Victor , Schwalb Jason M. , Abdulhak Muwaffak M. , Park Paul 
Published: August 2019

OBJECTIVEThe Oswestry Disability Index (ODI) is one of the most commonly used patient-reported outcome instruments, but completion of this 10-question survey can be cumbersome. Tools from the Patient-Reported Outcomes Measurement Information System (PROMIS) are an alternative, and potentially more efficient, means of assessing physical, mental, and social outcomes in spine surgery. Authors of this retrospective study assessed whether scores on the 4-item surveys of function and pain from the PROMIS initiative correlate with those on the ODI in lumbar spine surgery.METHODSPatients evaluated in the adult neurosurgery spine clinic at a single institution completed the ODI, PROMIS Short Form v2.0 Physical Function 4a (PROMIS PF), and PROMIS Short Form v1.0 Pain Interference 4a (PROMIS PI) at various time points in their care. Score data were retrospectively analyzed using linear regressions with calculation of the Pearson correlation coefficient.RESULTSThree hundred forty-three sets of surveys (ODI, PROMIS PF, and PROMIS PI) were obtained from patients across initial visits (n = 147), 3-month follow-ups (n = 107), 12-month follow-ups (n = 52), and 24-month follow-ups (n = 37). ODI scores strongly correlated with PROMIS PF t-scores at baseline (r = −0.72, p < 0.0001), 3 months (r = −0.79, p < 0.0001), 12 months (r = −0.85, p < 0.0001), and 24 months (r = −0.89, p < 0.0001). ODI scores also correlated strongly with PROMIS PI t-scores at baseline (r = 0.71, p < 0.0001), at 3 months (r = 0.82, p < 0.0001), at 12 months (r = 0.86, p < 0.0001), and at 24 months (r = 0.88, p < 0.0001). Changes in ODI scores moderately correlated with changes in PROMIS PF t-scores (r = −0.68, p = 0.0003) and changes in PROMIS PI t-scores (r = 0.57, p = 0.0047) at 3 months postoperatively.CONCLUSIONSA strong correlation was found between the ODI and the 4-item PROMIS PF/PI at isolated time points for patients undergoing lumbar spine surgery. Large cohort studies are needed to determine longitudinal accuracy and precision and to assess possible benefits of time savings and improved rates of survey completion.
ANALISIS PEMAHAMAN KONSEP HIMPUNAN MAHASISWA DITINJAU DARI ASAL SEKOLAH
Authors: Sudirman  
Published: August 2019

The purpose of this research is (1) analyze student’s concept in answering the association test, (2) analyze the concept of understanding relationship to answer the test depends on the student’s school origin.The method used in this research is qualitative with case study approach. In clustering sampling technique the subject was used in this research is 6 students, shared in 3 groups. They are 2 students come from public vocational school, 2 students come from public senior high school and 2 students come from private senior high school and vocational school. Data was collected through test and interview. Data analysis used in this research refers to Milles and Huberman in Moellong’s book; they are data reduction, data display and conclusion drawing. The result showed that the student’s understanding is various enough in answering the set test. Depending on the first subject analysis (S1) who came from private school, he did not understand about the concept of set. The second subject analysis (S2) and the third subject analysis (S3) who came from public school, they had understood. But, they need to be careful and patient to avoid the mistakes. The data which had gained from deeply interview, showed that the subject analysis (S1), (S2) and (S3) were able to indicate the relationship of school origin with the student’s concept of understanding within answering the set test.
PENGEMBANGAN PERANGKAT PENGAJARAN MATEMATIKA DENGAN PENDEKATAN PMR BERBANTUAN CD INTERAKTIF PADA MATERI PERSAMAAN LINEAR SATU VARIABEL KELAS VII
Authors: Zaenal Mutaqin Ikin 
Published: August 2019

This study aimed to develop and produce devices PMR mathematics learning approach aided interactive CD on the material linear equations class VII are valid and effective. The result of the development of mathematics learning with PMR approach on the material linear equations of one variable of class VII shows the validation results of the experts. Implementation field learning device that has generated valid and effective tool with active variable and process skills, reaching thoroughly studied, the effect of active variable and process skills to the learning outcomes and no difference between the control group and the implementation class. Once implemented obtained that result is students achieve a complete study with KKM = 65 gained 79.8 completeness. There is an active variable and process skills influence on the process of student learning outcomes by 79.3%. There are differences between the control group (66.7) and the implementation class (78.0). It concluded that the study of mathematics by PMR approach aided interactive CD on material class VII PLSV valid and effective.
PENGEMBANGAN BAHAN AJAR STATISTIKA BERBASIS INFORMATION AND COMMUNICATION TECHNOLOGY (ICT)
Authors: Suryani Lukman Hamidah , Sutisnawati Astri 
Published: August 2019

This paper is the research and development result of Statistics teaching materials based on ICT. The method used is the early stage of research and development that applied on the second phase of the study. The first stage is analysis the teaching materials through the study of literature; developing initial products; experts team validation; and first revised. The second phase is limited test to 13 students randomly selected that participated in the course Statistics on Mathematics Education Universitas Muhammadiyah Sukabumi, and do the second revised. The method used in the second stage is a single experiment one shot case study. The instrument used in this study are validation sheet, teaching materials performance and effectiveness sheet, and conceptual understanding test. These data were analyzed using descriptive analysis and Wilcoxon Signed Ranks Test on the level of α
= 5%. The results showed that average score of teaching materials validation is 4.50 out of

This result indicates that more than 80%

of ICT based teaching materials developed is feasible to use (valid) and classified as very
well category. Based on trial results,
conceptual understanding ability of students after using ICT based teaching materials
significantly better than before using ICT
based teaching materials. In addition, an overall assessment of performance effectiveness of ICT based teaching material reached 62.98% higher than the learning without ICT based teaching materials, which only reached 60.58%. These results indicate that using ICT based teaching materials in
learning has the valid, practical, and effective criteria, particularly in an effort to develop the students’ conceptual understanding ability.
PENGARUH DEBT RATIO, DIVIDEN PAY OUT RATIO, RETURN ON EQUITY, PERUMBUHAN LABA, UKURAN KORPORASI, DAN PERPUTARAN KAS OPERASI TERHADAP PER (Studi Di Korporasi Sektor Manufaktur yang Listing di Bursa Efek Indonesia Jangka Waktu 2009 – 2012)
Authors: Herlambang Herlambang 
Published: August 2019

The mean of this research is examine influence debt ratio, dividend payout ratio variable, return on equity variable, earnings growth, size, and operating cash flow on price earning ratio (PER) in finance and manufacturing companies in Indonesia Stock Exchange in the period of year 2009 to 2012. The population in this study is the company in the sector manufacturing listed on the Indonesia Stock Exchange period of year 2009 to 2012. Samples were taken by purposive sampling and obtained 45 companies in the manufacturing sector as sample. Linear Regression Analysis with Simultaneous Significance Test (F statistic Test) and Individual Parameter Significance Test (Test Statistic t) is an analytical technique used in this study. The results showed that the independent variables of the debt ratio variable, size together significantly influence the price earnings ratio (PER) in the financial sector companies in the BEI and the independent variables of the dividend payout ratio and earnings growth together significantly influence price earnings ratio (PER) at manufacturing companies listed on BEI. These results support data obtained from the World Bank regarding Indonesia's economic growth in 2012 on the production side, manufacturing performance is quite strong. This increase was achieved by the relatively large performance domestic sectors such as those in processed foodstuffs, processed various beverages and processed various tobacco products (increasing 10.4% year on year) as well as fertilizer yields, yields from chemicals and rubber products (increased by 15.4% from year to year).
ANALISIS PERBANDINGAN PENERAPAN METHOD NET BASIC DAN GROSS UP TERHADAP BEBAN PAJAK PENGHASILAN BADAN (Studi Kasus Pada PT.HI)
Authors: Halimah Imar 
Published: August 2019

The purpose of this study was to analyze the comparison of the application of the Net Method method and the Gross-up Method in the calculation of Article 21 Income Tax and find out which method was the most efficient used to save how much the Corporate Income Tax Expense (PPh owed by the agency) PT. HI, in this case the data analyzed is in 2011, 2012 and 2013.Data collection methods used in this study are secondary data obtained through documentation and observation of data for three years, namely in 2011 to 2013.The analytical method used in this study is descriptive analysis with a qualitative approach, namely research using documents or slowness, with data sources obtained from primary and secondary data, primary data is data obtained directly from the company, namely a general description of the company, data calculation of Income Tax Article 21 companies and profit and loss financial report data in 2011, 2012 and 2013. While secondary data is data processed by companies that are used as material for researchers. The results of this study indicate that there are differences between the net basic method and gross up method in the calculation of Article 21 Income Tax where the higher income tax payable if using gross up method with the acquisition of the difference in 2011 amounting to Rp.15,236,870, -, in 2012 of Rp. .19,573,460, - and in 2013 amounting to Rp.21,116,470, - but in this case the most efficient method of calculating Income Tax Article 21 on the calculation of income tax is owed by the corporate body using the gross-up method because by using gross up PPh method Article 21 payable can be financed in fiscal financial statements (uncorrected), while the net basic method of Article 21 Income Tax payable is made a positive correction so that the corporate corporate income tax burden is greater than using gross up method, and the results of comparison of calculations performed, gross method up does produce efficiency against Corporate Income Tax where companies can save money n income tax in 2011 amounted to Rp. 25,993,196, - in 2012 Rp. 34,605,170, - and in 2013 as much as Rp. 37,654,003.
PENGARUH PELATIHAN DAN MOTIVASI TERHADAP KINERJA KARYAWAN PADA HEAD OFFICE PADA PT PAM LYONNASE JAYA (PALYJA)
Authors: Anindita Anggi Fathya , Herawati Tuty , Utomo Wahyudi 
Published: August 2019

Abstract Influence of training and motivation on performance of employees at PT PAM Lyonnase Jaya (PALYJA). 2017. This research aims to find out how the influences between the training and motivation on performance of employees. Data collection using the questionnaire given to the respondents to obtain primary data and secondary data to obtain an libraries. While the method of data analysis using the test validity dan reliability, test the assumptionsof classical, test hypotheses, multiple linier regression analysis, analysis of the coefficient of determination of the significance of the T-test, and a test of the significance of f. Result of the research indicate that training has a strong influence on performance of employees and motivation have influence of 66,8% on performance of employees and the remaining 33,2% are influenced by other factors.Keywords: Training, Motivation, Employee Performance.AbstrakPengaruh Pelatihan dan Motivasi terhadap Kinerja Karyawan Pada head office PT PAM Lyonnase Jaya (PALYJA). 2017. Penelitian ini bertujuan untuk mengetahui seberapa pengaruh antara pelatihan dan motivasi terhadap kinerja karyawan. Pengumpulan data menggunakan kuesioner yang diberikan kepada responden untuk memperoleh data primer dan studi kepustakaan untuk memperolah data sekunder. Sedangkan metode analisis data menggunakan uji validitas dan reliabilitas, uji asumsi klasik, uji hipotesis, analisis regresi linier berganda, analisis koefisien determinasi, uji signifikansi T dan uji signifikansi F. Hasil penelitian menunjukan bahwa pelatihan memiliki pengaruh yang kuat terhadap kinerja karyawan dan motivasi memiliki pengaruh sebesar 66,8% terhadap kinerja karyawan dan sisanya 33,2% dipengaruhi oleh faktor lain.Kata Kunci: Pelatihan, Motivasi, Kinerja Karyawan
Old Perineal Rupture - From Diagnosis to Reparation
Authors: Santoso Budi Iman , Chan Nadir , Tanamas Leonardo 
Published: August 2019

Abstract
Objective: To describe and discuss the technique to diagnose, preparing the reparation and postoperative management in old perineal rupture case.Methods: A 28-year-old primipara woman was referred to YPK Mandiri Hospital after having incontinence to flatus, to urinate and passive soiling. Three months before admission, she had her first child through vaginal delivery.Discussion: She was diagnosed with a third-degree obstetric anal sphincter injury (OASIS). Rectal examination with digital palpation (pill-rolling motion) and ultrasound examination, revealed a distinct gap anteriorly (10 – 2 o'clock). End to end technique was preferred to repair the defect.Conclusion: A good understanding of perineal and anal sphincter anatomy is essential to diagnose OASIS. The aim of reconstructive surgery is to restore the continuity of both the external and internal anal sphincters. Ideally, the repair should be performed as soon as possible after the injury.Keywords:obstetric anal sphincter injuries, OASIS, third-degree tear, perineum, perineal trauma.

Abstrak
Tujuan:Untuk mendeskripsikan dan diskusi tentang tehnik dalam mendiagnosa, mempersiapkan operasi reparasi dan manajemen pasca operasi pada kasus rupture perineum lama.Metode:Sebuah laporan kasus yang diambil dari pasien perrempuan 28 tahun primipara yang dirujuk ke RS YPK Mandiri setelah mengeluhkan inkontinensia flatus, urin, dan keluarnya feses tanpa disadari. Tiga bulan sebelumnya, pasien melahirkan anak pertama melalui persalinan pervaginam.Diskusi: Diagnosa pasien adalah cedera sfingter ani obstetrik derajat tiga. Pemeriksaan rektal dengan palpasi digital (gerakan pill-rolling) dan pemeriksaan ultrasonografi, memperlihatkan adanya penipisan di daerah anterior (arah jam 10 – 2). Teknik end to end dipilih untuk memperbaiki defek.Kesimpulan:Pengetahuan yang baik mengenai anatomi perineum dan sfingter ani penting untuk mendiagnosis OASIS. Tujuan utama dari operasi rekonstruksi adalah untuk memperbaiki kontinuitas dari sfingter ani eksternal dan internal. Idealnya, reparasi dilakukan secepat mungkin setelah terjadinya cedera.
Kata kunci: cedera sfingter ani obstetrik, OASIS, perineum, trauma perineum, robekan derajat tiga
The accuracy of modified risk malignancy index (RMI) in predicting malignancy of epithelial type ovarian cancer
Authors: Triana Esfi , Dr. Defrin , Serudji Joserizal , Dr. Adriswan 
Published: August 2019

Abstract
Objective:To investigate the accuracy of modified Risk of Malignancy Index (RMI) in predicting malignancy of epithelial type ovarian tumour.
Method: This research was comparative research using cross-sectional study design, which compared RMI modification and RMI method in predicting malignancy of epithelial type ovarian tumour. The sampling technique was consecutive sampling. This research was conducted on October 2017 until samples were fulfilled in Obstetrics and Gynecology Division of RSUP Dr. M. Djamil and Laboratory of RSUP Dr. M Djamil in Padang. Chi-square test was used to compare specificity, sensitivity, positive predictive value (PPV), negative predictive value (NPV), positive likelihood ratio (PLR), negative likelihood ratio (NLR, and accuracy of RMI modification and RMI with 95% CI (p≤0,05).
Results: A total of 61 subjects were recruited in this study. Sensitivity, specificity, PPV, NPV, PLR, NLR, and accuracy RMI modification scoring was 90.5%, 82.5%, 73.1%, 94.3%, 5.1, 0.1, dan 85.2%. Sensitivity, specificity, PPV, NPV, PLR, NLR, and accuracy RMI scoring was 66.7%, 70%, 53.8%, 80%, 2.2, 0.4, and 70%
Conclusions:Modified RMI scoring method was more accurate in predicting the malignancy of ovarian type epithelial tumours than RMI.
Keywords: CA125, malignancy, ovarian tumor,pelvic mass, RMI,

Abstrak
Tujuan: Mengetahui akurasi Risk of Malignancy Index (RMI) dalam prediksi keganasan tumor ovarium tipe epitel.
Metode: Penelitian ini merupakan penelitian komparatif dengan desain penelitian potong lintang yang membandingkan metode RMI modifikasi dan RMI dalam prediksi keganasan tumor ovarium tipe epitel. Jumlah sampel sebanyak 61 orang. Teknik pengambilan sampel berurutan. Penelitian di mulai pada bulan Oktober 2017 hingga jumlah sampel terpenuhi di Departemen Obstetri dan Ginekologi RSUP Dr. M Djamil dan Laboratorium RSUP Dr. M Djamil Padang. Untuk membandingkan spesifisitas, sensitivitas, nilai duga positif (NDP), nilai duga negatif (NDN), rasio kemungkinan positif (RKP), rasio kemungkinan negatif (RKN), dan akurasi RMI modifikasi dan RMI digunakan uji chi-square dengan 99% CI (p≤0,01).
Hasil: Sensitivitas, spesifisitas, NDP, NDN, RKP, RKN, dan akurasi skoring RMI modifikasi adalah 90,5%, 82,5%, 73,1%, 94,3%, 5,1, 0,1, dan 85,2%. Sensitivitas, spesifisitas, NDP, NDN, RKP, RKN, dan akurasi skoring RMI adalah 66,7%, 70%, 53,8%, 80%, 2,2, 0,4, dan 70%.
Kesimpulan: Metode skoring RMI modifikasi lebih akurat dalam memprediksi keganasan tumor ovarium tipe epitel dibandingkan RMI.
Kata kunci: CA125, keganasan, massapelvik, RMI, tumor ovarium
Manfaat Vitamin C Terhadap Kejadian Ketuban Pecah Dini (KPD) Pada Ibu Bersalin
Authors: Munafiah Durrotun , Martaningtyas Ni Nyoman , Jumiyatun Jumiyatun 
Published: August 2019

Abstrak Ketuban pecah dini merupakan penyebab penting morbiditas dan mortalitas perinatal serta berhubungan dengan infeksi perinatal. Kadar vitamin C yang rendah pada ibu dapat meningkatkan resiko terjadinya ketuban pecah dini. Tujuan dari penelitian ini yaitu pengaruh riwayat pemberian vitamin C pada ibu bersalin terhadap kejadian Ketuban Pecah Dini (KPD) di wilayah Bangsri Jepara. Jenis penelitian yang digunakan adalah quasy experiment. Desain penelitian post test only two group design. Responden dalam penelitian ini adalah ibu bersalin di wilayah kerja Puskesmas Bangsri I pada bulan November 2018 sampai dengan Januari 2019 sebanyak 42 orang yang dibagi menjadi 21 responden pada kelompok intervensi dan 21 responden pada kelompok kontrol. Pada kelompok kontrol sebagian besar responden terjadi KPD sebanyak 55,0%. Pada kelompok intervensi sebagian besar responden tidak terjadi KPD sebanyak 90,5%. Terdapat pengaruh pemberian vitamin C terhadap kejadian Ketuban Pecah Dini ditunjukkan pada uji Mann-Whitney dengan nilai p value = 0,002 < 0,05. Disarankan pada ibu bersalin diharapkan diharapkan rutin melakukan ANC dan mematuhi anjuran tenaga kesehatan untuk mengenali tanda-tanda bahaya saat kehamilan salah satunya Ketuban Pecah Dini serta memperbaiki nilai asupan gizi selama kehamilan, sehingga dapat mengurangi angka kejadian kematian ibu dan janin