bluuebunny/crossref_metadata_2025_split huggingface dataset:
Spatial Statistical Investigation of Surface Expressions in the Midway Sunset Oil Field
Authors: Pollack Ahinoam 
Published: October 2018

Abstract
In the Midway Sunset Oil Field in Central California, operators inject steam into the shallow diatomite formation to enhance heavy oil recovery through imbibition, wettability alteration, and viscosity reduction, among other mechanisms. The injected steam, however, does not always remain in the reservoir or return through the wells. In two zones in the study area, the steam comes out at the surface, creating sinkholes, seeps, and steam outlets (see Figure 1b and 1c). These phenomena, called "surface expressions," pose safety and environmental hazards.
This study examines attributes of the zones with surface expressions that may contribute to their occurrence. It is hypothesized that the surface expressions are caused by leakage of steam through old improperly abandoned wells, high injection pressure, structurally controlled flow patterns, high injection volumes, or flow along naturally occurring faults, among other possible factors. Spatial statistical analysis using logistic regression and classification trees is used to explore the relationship between the surface expressions and spatial attributes. The results point to a significant spatial correlation between the surface expressions and two predictors: concentration of plugged wells and geologic seal thickness. These predictors emphasize the importance of both properly abandoning retired wells and having sufficient seal between the producing zone and the surface.
A New Computational Model to Predict Breakdown Pressures in Cased and Perforated Wells in Unconventional Reservoirs
Authors: Kurdi Mohammed 
Published: October 2018

Abstract
Unconventional shale reservoirs are characterised by their extreme low permeabilities and their high in-situ stresses. Multi-stage hydraulic fracturing therefore plays a key role in developing such reservoirs. However, depending on the in-situ stress magnitude and/or regime, breakdown pressures can be too extreme to achieve, given the available surface horsepower and downhole completion capabilities. This paper presents a newly developed model to predict the breakdown pressures in cased and perforated wells.
As the in-situ stresses are perturbed near the wellbore wall due to the drilled wellbore cavity, the local stresses near the wellbore wall need to be deduced. Using MATLAB software program, a transformation from the in-situ stresses to the wellbore local stresses is performed. As perforation notches also perturb the in-situ stresses, another transformation to the local stresses around the perforation notches is required. Increasing breakdown pressure causes the stresses surrounding the perforation notches to exceed the rock tensile strength. The value at which the tensile strength is exceeded dictates the required breakdown pressure.
As these transformation calculations depend on the wellbore inclination/azimuth angles, in-situ stress magnitude/regime and perforation phasing angle, a number of recommendations are presented. The results from the model recommend deep perforation penetration depths to expose the perforation tunnels to far field in-situ stresses. This eliminates the effects of local stresses and decreases the breakdown pressures. For normal faulting stress regimes, the results recommend steering the drilling bit as close as possible to Sh azimuth as any deviation results in an increase of breakdown pressure magnitude. It is also recommended to use oriented perforations rather than a typical phased perforation technique to minimize the formation breakdown pressures. The recommended oriented perforation angles depend on the in-situ stress magnitudes/regime and the wellbore trajectory.
The model aims to advance the current understanding of fracture initiation in highly deviated wells in shale reservoirs. It can also assist engineers to better select sweet spots for well and cluster placement to avoid excessive breakdown pressures and/or potential early proppant screenout.
Telemetry Data of Oilfield Facilities Analysis for the Purpose of Monitoring and Decision-Making Support at its Operation
Authors: Nafikov Tagir 
Published: October 2018

Abstract
In the article methods of the oilfield objects telemetry data analysis are considered for the purpose of malfunctions detection of these objects, determination of its off-nominal operating reasons and for support of management decisions making at its operation.
Telemetry production data of two objects was used: oil extraction using sucker rod pump units (SRPU) and super-high viscosity oil (HVO) production by the method of steam assisted gravity drainage.
As a result of incoming data from the SRPU monitoring system processing, an algorithm for automatic pump failures detection was developed and a method for these failures occurrence preventing was implemented.
To solve the tasks of monitoring and building of HVO wells models, a system was developed that allows to determine and visualize deviations of parameters current values from statistical models, to view models, and also to train these models on a range of selected data.
Role of Redox Processes in the Pedogenesis of Hypersaline Tidal Flat Soils on the Brazilian Coast
Authors: Sartor Lucas Resmini , Graham Robert C. , Ying Samantha C. , Otero Xosé Luis , Montes Célia Regina , Ferreira Tiago Osório 
Published: October 2018

Core Ideas
Iron and Mn movement followed by oxidation impose strong control on soil transformations.
Sulfidization is not an active process in hypersaline tidal flat (HTF) soils.
Coprecipitation of Mn and ferrihydrite controls the geochemistry of Mn in HTF soil.
Hypersaline tidal flats (HTFs) represent transitional ecosystems where the ocean, land, and freshwater meet. These places are globally widespread and their soils are an important environmental component controlling chemical reactions in wetland ecosystems. Here, we present a pedogenic study of two HTFs on the Brazilian coast (northeast and southeast) based on the solid‐phase geochemistry of Fe and Mn and morphological studies. Broken and irregular topographies and strong expression of redoximorphic concentrations (e.g., mottles, nodules, and pore linings) are present throughout the soil profiles. Although lepidocrocite is the most abundant Fe fraction in these soils (more than 50% of all extractions), deeper horizons show pyrite as the main Fe fraction caused by the presence of buried mangrove soils. The more oxidizing conditions in these deeper horizons indicate that pyrite is not stable and is undergoing degradation. Iron released in this process is moving upward and precipitating as Fe oxides in more oxidized portions of the soil profile. Coprecipitation of Mn and ferrihydrite seems to be an important process controlling the geochemistry of Mn in HTFs. Our data indicate that deeper horizons have been transforming, driven mainly by water table oscillation and, consequently, redox processes. This process allows translocation of Mn2+ and Fe2+ throughout the soil profile, followed by oxidation and precipitation of Mn3+/4+ and Fe3+ oxides in preferential sites.
Combined Virtual Screening, DFT Calculations and Molecular Dynamics Simulations to Discovery of Potent MMP-9 Inhibitors
Authors: Bahrami Hamed , Salehabadi Hafezeh , Nazari Zahra , Amanlou Massoud 
Published: October 2018

Background:
Matrix metalloproteinase-9 (MMP-9) plays a crucial role in the development
and progression of cancer. Therefore, identifying its inhibitors has enjoyed numerous
attentions. In this report, a hybrid approach, including pharmacophore-based virtual screening,
docking studies, and density functional theory (DFT) binding energy calculations followed by
molecular dynamics simulations, was used to identify potential MMP-9 inhibitors.

Methods:
Pharmacophore modeling based on ARP101, as a known MMP-9 inhibitor, was performed
and followed by virtual screening of ZINC database and docking studies to introduce a set
of new ligands as candidates for potent inhibitors of MMP-9. The binding energies of MMP-9
and the selected ligands as well as ARP101, were estimated via the DFT energy calculations.
Subsequently, molecular dynamics simulations were applied to evaluate and compare the behavior
of ARP101 and the selected ligand in a dynamic environment.

Results:
(S,Z)-6-(((2,3-dihydro-1H-benzo[d]imidazol-2-yl)thio)methylene)-2-((4,6,7- trimethylquinazolin-
2-yl)amino)-1,4,5,6-tetrahydropyrimidin-4-ol, ZINC63611396, with the largest
DFT binding energy, was selected as a proper potent MMP-9 inhibitor. Molecular dynamics simulations
indicated that the new ligand was stable in the active site.

Conclusion:
The results of this study revealed that compared to the binding energies achieved
from the docking studies, the binding energies obtained from the DFT calculations were more
consistent with the intermolecular interactions. Also, the interaction between the Zinc ion and
ligand, in particular the Zn2+-ligand distance, played a profound role in the quantity of DFT
binding energies.
Checklist of Akshara vidyalaya campus flora, Venkatachalam, Nellore, Andhra Pradesh, India.
Authors: K. Manipal , M.V. Kumuda , K. Madhava Chetty 
Published: October 2018

The present study was aimed at determining the plant species richness of the Akshara Vidyalaya (AV) campus, Nellore District. For this, the species richness data was obtained by intensive surveys in the campus from 2015–2017. We recorded 247 species in 194 genera belonging to 69 families composed of 52 trees, 55 shrubs and 140 herbs, two species are parasites. Poaceae (20 genera 24 species), Fabaceae (15 genera 21 species) are the two species richness families and an inventory checklist of all the species recorded is provided. This study reveals that AV campus is diverse and rich in ornamental/alien flora.
Pengaruh Pemberian Jus Buah Jambu Biji Merah Terhadap Kadar Haemoglobin Dan Vo2max Pada Aktifitas Fisik Maksimal
Authors: Sinaga Fajar Apollo 
Published: October 2018

Aktifitas fisik dapat menyebabkan peningkatan produksi radikal bebas yang dapat mengakibatkan penurunan antioksidan sehingga mempengaruhi performance atlet akibat terjadi sport anemia. Radikal bebas dapat dicegah atau dikurangi dengan pemberian antioksidan. Telah diketahui buah jambu biji merah mengandung berbagai jenis antioksidan alami tetapi belum pernah diteliti khasiatnya untuk mengurangi produksi radikal bebas yang dipicu oleh aktifitas fisik. Tujuan penelitian adalah mengetahui efek pemberian jus jambu biji merah terhadap kadar haemoglobin dan VO2max atlet pada aktifitas fisik maksimal. Jenis penelitian yang dilakukan adalah penelitian eksperimental dengan rancangan penelitian Randomized Control Group Pretest-Postest Design. Penelitian dilaksanakan di Stadion Universitas Negeri Medan dan Laboratorium Fisiologi FIK-UNIMED. Penelitian dilakukan selama 3 bulan. Populasi dan sampel penelitian adalah mahasiswa Ilmu Keolahragaan sebanyak 20 orang yang memenuhi kriteria yang dibagi menjadi 2 kelompok yaitu kelompok eksperimen dan kelompok kontrol. Pada penelitian dilakukan pengukuran kadar Haemoglobin dan VO2Max saat pre test dan post test. Hasil analisis data diperoleh bahwa pemberian jus jambu biji merah selama menjalani program latihan dapat meningkatkan kadar Hb dan VO2max pada aktifitas fisik maksimal.
Perbedaan Pengaruh Latihan Rebound and Dribble Variations dengan Latihan Dribbling Drills Terhadap Peningkatan Kemampuan Dribbling dalam Permainan Hoki pada Atlet Putera Unimed Hoki Club
Authors: Mahmuddin Mahmuddin 
Published: October 2018

Penelitian ini bertujuan: (1) Untuk mengetahui pengaruh latihan rebound and dribble variations, (2) Untuk mengetahui pengaruh latihan dribbling drills (3) Untuk mengetahui manakah pengaruh latihan yang lebih besar dari dua bentuk latihan untuk meningkatkan kemampuan dribbling bola dalam permainan hoki pada atlet putera Unimed hoki club tahun 2015. Metode penelitian ini eksperimen dengan teknik pengumpulan data menggunakan tes dan pengukuran yang melibatkan dua variabel bebas dan satu variabel terikat. Penelitian ini dilaksanakan lapangan serbaguna Universitas Negeri Medan, populasi dalam penelitian ini adalah 24 orang sedangkan sampel yang digunakan dalam penelitian berjumlah 10 orang. Dari hasil penelitian yang telah dilakukan dan hasil pengolahan data dengan analisis statistik diperoleh: Hipotesis (1), latihan rebound and dribble variations terdapat pengaruh yang terhadap peningkatan kemampuan dribbling dalam permainan Hoki pada atlet putera Unimed hoki club tahun 2015, (2) Latihan dribbling drills terdapat pengaruh yang signifikan terhadap terdapat pengaruh yang terhadap peningkatan kemampuan dribbling bola dalam permainan Hoki pada atlet putera Unimed hoki club tahun 2015, (3) Latihan rebound and dribble variations lebih besar pengaruhnya bila dibandingkan dengan latihan dribbling drills terhadap peningkatan kemampuan dribbling dalam permainan hoki pada atlet putera Unimed hoki club tahun 2015.
PENGARUH METODE LATIHAN SIRKUIT, METODE KONVENSIONAL TERHADAP KETERAMPILAN DASAR BOLA BASKET
Authors: Perdima Feby Elra 
Published: October 2018

Based on the researchers abservation on the field, the student’s of SMA Negeri 1 Lebong Utara shill have lack of basic skill of basketball. This research aimed to explain the different effect between sirkuit exercise method and convensional method toward the increasing of student basic skill of basketball of SMA Negeri 1 Lebong Utara. This research is quasi experimental research the population of this research was 32 student. The sampling techique that used in this research was jenuh smpling techique. So that 32 student’s was choosen. the test used in this research were driible zig-zag, passing, under basket. Which aimed to know the student’s basic skill of basketball at SMA Negeri 1 Lebong Utara. Analysis technique that was used in this recearch was t-test. The result of data analysis showed that (1) sirkuit exercise method can increase the student basic skill of basketball at SMA Negeri 1 SMA Negeri 1 Lebong Utara (tobserved 16,77 > ttable α=0,051,75) (2) convensional method can increase the student’s basic skill of basketball at SMA Negeri 1 Lebong Utara (tobserved 9,25> ttable α=0,05 1,75) (3) there is significant differences betwenn sirkuit exercise method with convensional method toward student’s basic skill of basketball at SMA Negeri 1 Lebong Utara (tobserved 3,50 > ttableα=0,051,75).
Hubungan Antara Pengetahuan Manajemen Dan Komitmen Dengan Kinerja Pengurus Pusat Pendidikan dan Latihan Pelajar (PPLP) Di Sumatera Utara
Authors: Akhmad Imran 
Published: October 2018

Penelitian ini bertujuan untuk mengetahui hubungan antara pengetahuan manajemen dan komitmen terhadap kinerja pengurus Pusat Pendidikan dan Latihan Pelajar (PPLP) di Indonesia. Disamping itu penelitian ini juga untuk mengetahui hubungan antara pengetahuan manajemen dan komitmen secara bersama-sama terhadap kinerja pengurus PPLP di Indonesia. Penelitian ini dilaksanakan di Sumatera Utara pada bulan Februari sampai Juni 2016. Metode penelitian yang dipergunakan adalah metode deskriptip dengan korelasional. Teknik pengambilan sampel dengan menggunakan proporsional random sampel yang berjumlah 40 orang.Teknik analisis yang dipergunakan adalah teknik regresi. Hasil penelitian ini menyimpulkan bahwa : (1) Terdapat hubungan yang signifikan antara pengetahuan manejemen dengan kinerja pengurus PPLP di Sumatera Utara dengan menunjukkan thit = 43,28 > ttab 1.68, (2) Terdapat hubungan yang signifikan antara komitmen dengan kinerja pengurus PPLP di Sumatera Utara dengan menunjukkan thit = 79.3 > ttab 1.81, (3) Terdapat hubungan yang signifikan secara bersama-sama antara Pengetahuan Manajemen dan Komitmen dengan kinerja pengurus PPLP di Sumatera Utara dengan menunjukkan thit = 4.94 > ttab sebesar 1.81.
PERBANDINGAN METODE LATIHAN MENGGUNAKAN SATU BOLA DAN DUA BOLA SECARA BERSAMAAN TERHADAP KETERAMPILAN DRIBBLING BOLA BASKET MELEWATI RINTANGAN MENGGUNAKAN TANGAN KANAN DAN KIRI PADA SISWA PUTRA KELAS VII SMP NEGERI 41 PALEMBANG
Authors: Mayasari Sopia Krama , Rachman Fadlu , Siregar Yunita Lasma 
Published: October 2018

Perbandingan Metode Latihan Menggunakan Satu Bola dan Dua Bola Secara Bersamaan Terhadap Keterampilan Dribbling Bola Basket Melewati Rintangan Menggunakan Tangan Kanan dan Kiri Pada Siswa Putra Kelas VII SMP Negeri 41 Palembang”. Penelitian ini penelitian eksperimen, yang bertujuan untuk mengetahui perbandingan metode latihan yang lebih efektif untuk meningkatkan keterampilan dribling bola basket, metode latihan satu bola ataukah dua bola secara bersamaan. Berdasarkan hasil analisis data didapat rata-rata pretest kelompok satu bola 25,70 dan kelompok dua bola 25,52, lalu rata-rata posttest didapat kelompok satu bola 23,23 dan kelompok dua bola 23,43. Dari hasil tersebut didapat perbandingan rata-rata pretest dan posttest untuk kelompok satu bola sebesar 2,47 dan dua bola sebesar 2,09. Sedangkan hasil dari analisis varians didapat varians pretest kelompok satu bola 12,30 dan dua bola 10,12, maka didapat F-hitung pretest sebesar 1,21, lalu analisis varians posttest kelompok satu bola 10,36 dan dua bola 11,15, makan F-hitung posttest sebesar 1,07. Sehingga dari hasil analisis data F-hitung posttest 1,07 dan F-tabel didapat 3,14 maka Fhitung 1,07 > Ftabel 3,14 berarti Ha ditolak.
PENGOLAHAN LIMBAH CAIR LOGAM Fe DARI SISA CUCI ALAT-ALAT GELAS PADA LABORATORIUM PENGENDALIAN PENCEMARAN DENGAN ALAT JARTEST METODE ELEKTROKOAGULASI DAN SPEKTROFOTOMETER
Authors: Anzar Erniati 
Published: October 2018

Proses kegiatan praktikum pada laboratorium Pengendalian Pencemaran menggunakan bahan-bahan kimia yang mengandung logam-logam berat seperti senyawa FeCl3, FeSO4. Limbah logam berat Fe yang berwarna merah orange akan sangat berbahaya apabila limbahnya langsung dibuang ke lingkungan. Agar tidak menganggu dan merusak lingkungan limbah Fe diolah dahulu dengan metode elektrokaogulasi dengan menggunakan Poly Aluminium Chlorida (PAC). Menetralkan asam daripada limbah dengan penambahan CaCO3, karena limbahnya sangat bersifat asam oleh karena itu sangatlah perlu dinetralkan.Hasil karakterisasi limbah Fe dengan alat Jart Tes metode elektrokoagulasi dengan penggunaan Poly Aluminium Chloride (PAC) dengan variasi kecepatan pengadukan 100 rpm dan 200 rpm, penetralan pH dengan alat PCD Portable 650, dan pengukuran kekeruhan limbah dengan turbiditymeter berhasil menurunkan kadar Fe menjadi 0.1196 ppm 200 rpm dan 0,4075 ppm 100 rpm. Limbah Fe berwarna merah orange menjadi bening dan pH netral dapat memenuhi syarat untuk dibuang ke lingkungan bebas.
Çelik payandalarla güçlendirilmiş Tokat Deveci Hanı’nın sismik analizi
Authors: ÇAVUŞ Murat , SÖZEN Şahin 
Published: October 2018

Çelik payandalarla tarihi yapıların desteklenmesi ve güçlendirilmesi işlemi ülkemizde birçok yapıda kullanılmaktadır. Malzeme özellikleri ve mekanik davranış bakımından birbirinden farklı iki yapının etkileşimi oldukça önemli ve tartışmalı bir konudur. Bu çalışmada restorasyonu daha önce tamamlanmış ve bir kısmı çelik payandalarla desteklenmiş olan Tokat Deveci Hanı’ndaki uygulamanın mevcut yapı ile etkileşimi incelenmiştir. Çalışmada mevcut tarihi yapının belli bir bölümünden alınacak prototip model üzerinde yapının bulunduğu bölgenin zemin ve deprem durumu göz önüne alınarak oluşturulan spektrum eğrileri dikkate alınarak yapı sonlu elemanlar metoduyla Sap 2000 programında modellenmiş ve analizleri yapılmıştır. Analiz sonuçlarına göre muhtemel depremlere karşı tarihi yapıyı güçlendirmek amacıyla inşa edilen payandaların, yapı elemanlarında oluşan gerilmeler ve yapı periyodunu azaltma noktasında çok küçük bir etkisinin olduğu tespit edilmiştir.
ETIKA KERJA ISLAM, KOMITMEN ORGANISASI, SIKAP PADA PERUBAHAN ORGANISASI TERHADAP KINERJA
Authors: Putro Prima Utama Wardoyo 
Published: October 2018

The subject of this study is to examine the impact of Islamic work ethics, organizational commitment, and attitude toward organizational change to work performance, where attitude toward organizational change as an intervening. Organizational commitment consists of affective commitment, normative commitment, and continuance commitment. The samples of this research are theacers of state Islamic school in Sragen Regency. The instrument analysis to test the model is AMOS. The result showed that Islamic work ethics has no positif significant effect to work performance and attitude toward organizational change. Either organizational commitment has no positif significant effect to performance. Organizational commitment has positif significant effect to attitude toward organizational change and attitude toward organizational change has positif significant effect to performance. The variable of attitude toward organizational change has no mediation effect between Islamic work ethics to work performance, and has no mediation effect between organizational commitments toward work performance.
Keywords—Work Performance; Islamic Work Ethics; Attitude Toward Organizational Change; Organizational Change; Commitment
Abstrak
Dalam penelitian ini, diuji pengaruh etika kerja didalam lingkup Islam, komitmen pada organisasi, dan sikap dalam menghadapi perubahan organisasi terhadap kinerja karyawan. Dalam penelitian ini, komitmen organisasi didasari pada tiga aspek: affective commitment, normative commitment, dan continuance commitment. Sampel yang digunakan untuk penelitian ini adalah guru yang dikhususkan pada sekolah Islam (madrasah) di Kabupaten Sragen. Penelitian ini menggunakan AMOS sebagai alat analisis. Berdasarkan hasil penelitian diperoleh bahwa etika kerja Islam, komitmen, dan sikap terhadap perubahan di organisasi tidak memberikan pengaruh yang signifikan terhadap kinerja guru. Sementara itu komitmen organisasi berpengaruh signifikan terhadap sikap pada perubahan organisasi. Sikap terhadap perubahan organisasi juga berpengaruh terhadap kinerja guru. Variable sikap terhadap perubahan organisasi tidak memediasi antara variable etika kerja Islam pada kinerja dan tidak memediasi antara komitmen pada kinerja.
Kata kunci—kinerja, etika kerja Islam, sikap pada perubahan organisasi, perubahan organisasi, dan komitmen.