bluuebunny/crossref_metadata_2025 huggingface dataset:
Muslimah Beauty: Negotiating Veiling, Piety and Commodity in the New Indonesian Public Sphere
Authors: Sunesti Yuyun
Published: January 2020

This paper explores the veiling issues and the negotiation of piety among women in Komunitas Muslimah Beauty of Detik Forum. This paper examines to what extent this online community discusses hijab as fashion and piety? what the basis of the arguments for negotiating them? and how is piety constructed through commodity by women in that forum? The answers to this question are important to understand because they examine the assumption considering the lack of connection between piety and veiling when both are more materialized in such of commodity fetishism. To do this, I analyze the online discussion within the Komunitas Muslimah Beautiful in detik.com website. The findings of the paper inform both sociological understanding of the rise democracy in terms of the public sphere as well as the negotiation of women in their effort to connect veiling and piety within their online discussion.Â Keywords: agency, piety, commodity, public sphere, beauty
Perseteruan Memori Kolektif: Kontestasi Islam dan Politik di Tasikmalaya Pasca-Orde Baru
Authors: Mudzakkir Amin
Published: January 2020

Tulisan ini bertujuan memahami Islam politik pasca-Orde Baru, dengan mengambil kasus di Tasikmalaya, dari perspektif sejarah dan reaktualisasinya. Maurice Halbwachs dan Pierre Nora menyebut hal terakhir itu sebagai memori, yang dianggap antitesis sejarah. Dalam praktiknya, batas antara sejarah dan memori memang kabur atau dikaburkan. Untuk analisis di tulisan ini, dua hal tersebut diposisikan berbeda. Fokus tulisan adalah memahami sejauh mana demokrasi bekerja dalam nilai-nilai kultural setempat yang mungkin bertentangan dengan pandangan HAM liberal. Kasus Tasikmalaya ini menarik untuk diletakkan dalam konteks â€œkomunitarianisme demokratisâ€ dan secara lebih luas dapat digunakan untuk melihat toleransi di Indonesia dengan kacamata kerjasama antara prinsip universal HAM dan interpretasi-interpretasi agama yang berpijak pada pengalaman komunal.Â Kata kunci: Tasikmalaya, Islam politik, Orde Baru, Memori Kolektif
Adaptation reactions of hemodynamic systems on artificially modulated stress in healthy individuals
Authors: Smolyakov Yuri N. , Kuznik Boris I. , Kalashnikova Svetlana A. , Nolfin Nikolay A. , Fedorenko Ekaterina V. , Mikhahanov Mankhar Mikhailovich
Published: January 2020

Aim. To study the influence of artificially created stress on hemodynamic parameters of peripheral microcirculation and variability of the heart rhythm in somatically healthy young individuals.
Materials and Methods. In the study 30 individuals were involved (of them 16 men) with the mean age 18.21.1 years. An artificial stress was created using Stroop method. Assessment of characteristics of hemodynamics of microcirculation (HM) was performed by the method of dynamic scattering of light from erythrocytes. The signal was integrated in the form of three hemodynamic indexes: HI (Hemodynamic Indexes). Low frequency index (HI1) was determined by a slow interlayer interaction, high frequency area (HI3) characterized fast shearing of layers. HI2 took intermediate position (precapillary and capillary blood flow). Variability of cardiointervals isolated from pulse component, was assessed by method of variation pulsometry (Heart Rate Variability, HRV).
Results. In the course of study, increase in the heart rate (HR) in the stage of testing was observed that confirms a high extent of stress load. In hemodynamics, redistribution of blood flow was noted toward slow shear velocities (near-wall blood flow). After cessation of stress load, hemodynamic parameters declined and returned to previous values. Parameters characterizing variability of rhythm LF (sympathetic component), HF (vagal activity), CVI (non-linear parasympathetic index) showed a tendency to growth; here, LF/HF ratio did not change.
Conclusion. In result of the carried out study it was possible to formulate a multifactor picture of variation of parameters of microcirculation and of autonomic regulation of cardiac rhythm specific of reactions of adaptation to induced stress. The quantitative criteria of the obtained shears may be integrated into stress indexes to be used in clinical practice. A portable mDLS sensor may be supplemented with specific assessment criteria and used for monitoring of adaptive reactions induced by stressful situations, and for taking early diagnostic and prognostic decisions in the clinical practice, and for self-control of a patient.
Advantages of modern methods of prevention of thrombotic complications in patients with critical ischemia of lower limbs after reconstructive operations
Authors: Katelnitskiy Ivan I. , Katelnitskiy Igor I. , Livadnyaya Ekaterina S.
Published: January 2020

Aim. To evaluate and improve the results of reconstructive operations in patients with obliterating atherosclerosis with critical ischemia of the lower limbs through reduction of the rate of thrombotic complications by improvement of diagnosis of risk factors for thrombosis on the basis of coagulogram and Thrombodynamics T-2 test data.
Materials and Methods. In the I group of patients (n=48) reconstructive operations were performed on the arteries of lower limbs and anticoagulant therapy with unfractionated heparin (UFH) with control of hemostasiogram before the operation, in 6 hours and 6 days after the operation and with additional control of APTT 30 minutes before introduction of UNH. In the II group (n=34) reconstructive operations were performed with selection of anticoagulant therapy using parameters of hemostasiogram and laboratory-diagnostic system Thrombodynamics Recorder T-2 with control before the operation, in 6 hours, 6 days after the operation and with additional control of APTT in 30 minutes before introduction of UFH.
Results. Analysis of the data of coagulogram and Thrombodynamics T-2 test showed statistical significance of APTT, fibrinogen, delay and initial speed of clot growth, a combination of which permits a possibility for correction of heparin therapy for prevention of thrombosis.
Conclusions. The dynamics of the parameters of Thrombodynamics T-2 test in selection of UFH dose proves high effectiveness of this method for selection of adequate doses of anticoagulant drugs for prevention of postoperative thromboses in patients with critical ischemia of the lower limbs.
Statutory regulation of subsidized pharmaceutical provision in Russian Federation
Authors: Nagibin Oleg A. , Manukhina Elena V. , Komarov Ilya A.
Published: January 2020

At present in the Russian Federation (the RF), an organized system of pharmaceutical provision of benefit-entitled citizens is used. With this, statutory regulation is under continuous improvement through adoption of new regulatory acts and amendments to already existing ones [1]. The basis of this process is equal opportunities and rights of all individuals for free provision with medical drugs. Nevertheless, there exist benefit-entitled categories of citizens for whom additional approaches to organization of pharmaceutical provision were adopted.
Aim. Analysis of statutory regulation applicable to the existing benefit-entitled citizens.
Conclusion. The established normative framework regulating pharmaceutical provision of benefit-entitled citizens both on the federal and regional levels, permits patients to receive the necessary life-saving medicinal therapy. With this, an obligatory condition for receiving such assistance is presence of a certain diagnosis or a certain social status. Far not all patients are included into the list of benefit-entitled citizens. Hence, the existing statutory regulation of healthcare requires further improvement.
Korpusavusteinen virheanalyysi tarkkuuden kehityksestä EVK:n taitotasoilla A2–B2
Authors: Brunni Sisko , Jantunen Jarmo , Skantsi Valtteri
Published: January 2020

Artikkelissa tarkastellaan kielitaidon taitotasoittaista kehittymistä potentiaalisten esiintymien analyysin (Potential Occasion Analysis, Thewissen, 2015) avulla. Kehittymistä analysoidaan tarkkuuden näkökulmasta, ja sitä mitataan kohdekielen muoto- ja käyttökonventioista poikkeavien muotojen määrällä. Tutkimus on korpuspohjaista virheanalyysia (Corpus-aided Error Analysis, Dagneaux, Dennes & Granger, 1998), ja se perustuu taitotasoilla havaittujen, yhdeksään virheluokkaan sijoittuvien virheiden määrien tilastolliseen testaukseen. Aineistona on Kansainvälinen oppijansuomen korpus (ICLFI). Analyysi osoittaa, että merkittävintä kehitys on tasojen B1 ja B2 välillä; tasojen A2 ja B1 välillä tarkkuuden kehityksessä on nähtävissä myös regressiota (esim. määrite- ja fraseologiset virheet) ja stabilaatiota, jota esiintyy erityisesti morfosyntaktisissa ja syntaktisissa virhetyypeissä. Tasojen B1 ja B2 välillä muutos on kuitenkin niin selvää, että erityisesti morfosyntaktisen ja syntaktisen tarkkuuden lisääntymisen voisi nostaa yhdeksi tasoa B2 määrittäväksi piirteeksi. Jo aiemmissa tutkimuksissa taso B1 on nähty selvänä kulminaatiopisteenä kielen kehityksessä (ks. esim. Kajander, 2013, s. 93–95; Seilonen, 2013, s. 59–61; ks. myös Thewissen, 2015), ja tämän tutkimuksen valossa näin on myös tarkkuuden kehityksessä.
The Influence of Processing and Regulation of Learning on Academic Achievement Amongst First Year Undergraduate Psychology Students in University of North Sumatra
Authors: Novel Fonds , Ajisuksmo Clara R. P. , Supriyantini Sri
Published: January 2020

Transition of learning from secondary to higher education demands new students to do academic adjustments, especially towards the change from rote learning to student-centered learning. Student-centered learning requires students to process learning material with more depth and to regulate their own learning. These skills often relate with academic achievement. The purpose of this study was to investigate the influence of processing and regulation of learning conducted by first-level students on academic achievement. Other factors that affect academic achievement were explored too, such as student’s sex, parental support, conception of learning, and learning orientation . This study used mixed method. Quantitative data was obtained through Inventarisasi Cara Belajar (ICB) or Learning Style Inventory, which was filled by 180 third-semester students. ICB was used for measuring the processing and regulation of learning and their effect on academic achievement, which is depicted by Grade Point Average (GPA). Qualitative data was obtained through group interviews. Results of the study indicate that lack of regulation is the only one variable that can predict student academic achievement with a negative correlation. Several other factors were found to affect student academic achievement, including learning orientation, learning conceptions, learning motivation, academic commitment, and parental support. Researcher then designed a training based on reciprocal-teaching approach as an intervention with students as the participant.
Design of a Human Knee Reeducation Mechanism
Authors: Brahmia Allaoua , Kelaiaia Ridha
Published: January 2020

To establish an exercise in open muscular chain rehabilitation (OMC), it is necessary to choose the type of kinematic chain of the mechanical / biomechanical system that constitutes the lower limbs in interaction with the robotic device. Indeed, it’s accepted in biomechanics that a rehabilitation exercise in OMC of the lower limb is performed with a fixed hip and a free foot. Based on these findings, a kinematic structure of a new machine, named Reeduc-Knee, is proposed, and a mechanical design is carried out. The contribution of this work is not limited to the mechanical design of the Reeduc-Knee system. Indeed, to define the minimum parameterizing defining the configuration of the device relative to an absolute reference, a geometric and kinematic study is presented.
A Four-Node Tetrahedral Finite Element Based on Space Fiber Rotation Concept
Authors: Meftah Kamel , Sedira Lakhdar
Published: January 2020

The paper presents a four-node tetrahedral solid finite element SFR4 with rotational degrees of freedom (DOFs) based on the Space Fiber Rotation (SFR) concept for modeling three-dimensional solid structures. This SFR concept is based on the idea that a 3D virtual fiber, after a spatial rotation, introduces an enhancement of the strain field tensor approximation. Full numerical integration is used to evaluate the element stiffness matrix. To demonstrate the efficiency and accuracy of the developed four-node tetrahedron solid element and to compare its performance with the classical four-node tetrahedral element, extensive numerical studies are presented.
Femina oeconomica. Fighting against Landflucht in the Program of Agrarian Women’s Movement in Prussia before the Outbreak of World War I
Authors: Szudarek Agnieszka
Published: January 2020

In February 1914, the Agricultural Associations of Housewives, operating in the Eastern provinces of Prussia since the 1890s, were subordinated to organisations responsible for the development of agriculture in Prussia, which were dominated by conservatives and noble landowners. This came about on the initiative of some influential agrarians, who, in this way, wanted to strengthen their influence in rural areas, as well as to include the women’s agrarian movement in combating the outflow of labour from agriculture. The women’s organizations, having been politicized in this way and adopted by agrarian leaders after 1908, were to implement a new strategy for preventing the migration of rural population to cities. This is as a resulted of the partial support for Heinrich Sohnrey’s programme and his concept of improving the quality of life in rural areas. Elisabet Boehm, the founder of the associations, from the very beginning of their existence, sought to cooperate with agricultural organizations. She believed that this would be the only way for members to gain access to the expertise for implementing the main point of the association’s agenda, i.e. the professionalization of women’s work in rural areas. The article focuses on explaining the circumstances that led to the interest of the agrarians in the women’s agrarian movement and its inclusion in the reform programme for rural prosperity launched just before the war and showing that the cooperation was primarily aimed at using the associations to strengthen their influence in rural areas.
ISTRAŽIVANJE STRUJANJA JONSKE TEČNOSTI PRIMENOM RAČUNARSKE DINAMIKE FLUIDA
Authors: Oluški Nikola
Published: January 2020

Predmet rada jeste strujanje jonske tečnosti N-butil N,N,N trimetilamonijum bis(trihlormetilsulfonil)imid, skraćeno [N4111][NTf2], kroz pravu cev. Cilj rada jeste istraživanje prinudne konvekcije i hidrauličkih karakteristika pri strujanju jonske tečnosti kroz pravu cevnu deonicu. Istraživanje je urađeno primenom računarske dinamike fluida pomoću program­skog paketa StarCCM+. Pri analizi termičkih i hidrauličkih karakteristika zaključeno je da predmetna jonska tečnost ne predstavlja najbolje rešenje kao medijum za prenos toplote za date uslove.
PRIMENA UČENJA USLOVLJAVANJEM NA OBUČAVANJE AGENTA ZA AUTONOMNO KRETANJE U OKRUŽENJU CarRacing-v0
Authors: Šarenac Novica
Published: January 2020

U radu je opisan trening i evaluacija agenta za autonomno kretanje u OpenAI Gym okruženju CarRacing-v0. Okruženje predstavlja stazu za vožnju automobila iz ptičije perspektive. Za treniranje agenta korištene su tehnike učenja uslovljavanjem. Poređene su osobine algoritama u pogledu rezultata postignutih u okruženju, dužine treniranja i implementacionih detalja. Implementirani i poređeni algoritmi su: Deep Q-Network (DQN), Advantage Actor Critic (A2C) i Asynchronous Advantage Actor Critic (A3C).
NAVIGACIJA U TRODIMENZIONALNOM OKRUŽENJU Obstacle Tower UPOTREBOM UČENJA USLOVLJAVANJEM
Authors: Njegovanović Predrag
Published: January 2020

Učenje uslovljavanjem u današnjem poretku stvari kada je veštačka inteligencija u velikom usponu predstavlja povoljno polje za nova istraživanja.. Jedan od problema koji je rešavan poslednjih godinu ili dve jeste problem kontrole okruženja ili navigacije. U ovom radu predstavljen je jedan vid rešenja problema navigacije i generalizacije u trodimenzionalnom okruže­nju pri postojanju ograničenja nagrada, formiranjem autonomnog agenta tehnikama dubokog učenja. Evalua­cija performansi agenta izvršena je poredbom sa ljudskim performansama i rezultatima već opisanih u propratnim naučnim radovima.
PRIMENA MAŠINSKOG UČENJA U ANALIZI RELEJNE ZAŠTITE PRI STARTU ASINHRONIH MOTORA
Authors: Maksimović Milorad
Published: January 2020

U radu se razmatra primena mašinskog učenja u analizi sigurnosti relejne zaštite pri startu asinhronih motora. Cilj je da se prikažu prednosti i različite pogodnosti primene ovakve vrste analize u odnosu na standardne proračune pri startu asinhronih motora. Razmatranja su izvršena na velikom broju različitih topoloških struktura u cilju dobijanja što preciznijeg modela predviđanja.
СИСТЕМ ЗА УПРАВЉАЊЕ РАЊИВОСТИМА У СОФТВЕРУ
Authors: Ковачевић Maрија
Published: January 2020

У раду је описана имплементација система за управљање рањивостима у софтверу и објашњени су механизми за откривање јавно идентификованих рањивости.
PROFIBUS INDUSTRIJSKA PERIFERIJA
Authors: Srećkov Stevan
Published: January 2020

U radu je prikazana realizacija elek­tronskog uređaja čija je glavna namena prikupljanje i obrada podataka sa senzora u industrijskim postroje-njima i njihovo slanje glavnom PLC-u putem PROFIBUS mreže u realnom vremenu. Ove podatke je istovremeno moguće snimati i na micro SD karticu, što je pogodno za kasniju analizu. Uređaj poseduje osam digitalnih ulaza, četiri digitalna izlaza, osam analognih ulaza (analogni signali mogu biti strujni ili naponski), jedan spoljni priključak za serijsku komunikaciju, kao i interfejs za povezivanje uređaja na PROFIBUS mrežu. Napajanje uređaja, kao i svi digitalni ulazi i izlazi su prilagođeni standardnom industrijskom naponu od 24 V. Opsezi ulaznih analognih signala takođe odgovaraju industri-jskom standardu (0 – 10 V za naponske i 4 – 20 mA za strujne signale).
PROGRAMSKO REŠENJE ZA PRAĆENJE MREŽNOG SAOBRAĆAJA SCADA PROTOKOLA
Authors: Klašnić Zvezdana
Published: January 2020

U radu je prezentovano programsko rešenje za praćenje mrežnog saobraćaja SCADA pro­tokola. Implementirano programsko rešenje može se kori­stiti za nadgledanje mrežnog saobraćaja, analizu poruka SCADA protokola, za formiranje i prikazivanje konfigu­racije mreže u vidu stabla na osnovu obrađenih poruka, kao i za otkrivanje problema u mreži.
PREDLOG ARHITEKTURE CI/CD PIPELINE-A KORIŠĆENJEM JENKINS I DOCKER ALATA
Authors: Popuča Milena , Popov Srđan
Published: January 2020

U radu su detaljno analizirana dva najpopulanija alata za pravljenje CI/CD pipeline-a. Infrastruktura je postavljena uz akcenat na Docker na kome su pokrenuti svi servisi potrebni za CI/CD. Za primer aplikacije na kojoj je pipeline implementiran uzeta je SpringBoot i AngularJS aplikacija podsistema za fakturisanje.
PROCES RAZVOJA GENERIČKE POSLOVNE APLIKACIJE
Authors: Grbić Ilija
Published: January 2020

U današnje vreme sve više jača tenden­cija digitalizacije podataka iz različitih domena kako bi se olakšala njihova pretraga i brz pristup. Upotreba informacionih sistema postala je opšteprihvaćena u oblastima obrazovanja, medicine i privrede. Državna up­rava i pravni sistem u Republici Srbiji postepeno prime­njuju informacione sisteme u svakodnevnom poslovanju što se dalje odražava i na advokate. Advokatske kance­larije trenutno prvenstveno rade sa fizičkim ili eventualno skeniranim dokumentima, dok je primena namenskih soft­verskih alata slabo prisutna. Cilj ovog rada jeste prikaz procesa razvoja delom generičke aplikacije za evidenti­ranje i upravljanje pre svega advokatskih predmeta, ali i ostalih podataka neophodnih u radu advokatske kancelarije.
ANALIZA I OBRADA TEKSTA POMOĆU RAZLIČITIH MODELA TEMA
Authors: Hrnjaković Olivera
Published: January 2020

Ovaj rad opisuje trenutne mogućnosti i ograničenja postojećih algoritama za izdvajanju tema iz teksta. Dat je teorijski prikaz popularnih modela tema uz sve neophodne korake analize i obrade teksta koji se izvršavaju pre slanja podataka na ulaz modela. Praktičan deo rada je izdvajanje tema iz pitanja sa sajta Stack overflow. Upoređeni su LSA, PLSA i LDA pristup, a evaluacija modela je izvršena određivanjem koherent­nosti tema odgovarajućim merama,  imenovanjem tema i analizom njihove vizuelizacije u prostoru. Kako modeli tema unapred zahtevaju navođenje broja tema koje će biti izdvojene iz teksta, deo rada posećen je optimizaciji hiperparametara. Izabrani model za modelovanje tema jeste LDA sa 6 tema. Da bi se dobila numerička procena performansi modela 30 pitanja je ručno označeno imenima dobijenih tema i simuliran je klasifikacioni model. Ova pitanja su korišćena kao test skup podataka u kreiranom LDA klasifikacionom modelu. Postignuta je uspešnost od 77% tačnosti.
ПРОШИРЕЊЕ MONGODB БАЗE ПОДАТАКA ОТВОРЕНОГ КОДА ЗА ИНДЕКСИРАЊЕ И ПРЕТРАЖИВАЊЕ СРПСКИХ ТЕКСТОВА
Authors: Петковић Стефан
Published: January 2020

Рад описује имплементацију про-ширења, MongoDB базе података отвореног кода, за подршку индексирања и претраживања српских те-кстова писаних на оба писма.
RAZVOJ I ANALIZA ANDROID APLIKACIJE PET SHOP
Authors: Tedić Smiljana
Published: January 2020

U radu je opisana izrada android aplikacije za podršku rada prodavnica kućnih ljubimaca. Modeliranje je dato preko UML dijagrama, a aplikacija je implementirana korišćenjem Java programskog jezika i Android studio razvojnog okruženja.
REGULACIJA TEMPERATURE KGH SISTEMA UPOTREBOM PI-LIKE FUZZY REGULATORA I GA
Authors: Maksimović Saša
Published: January 2020

Osnovni zadatak ovog rada jeste regulacija temperature KGH sistema, a da se pri tom ne naruše zahtevani radni uslovi. Korišćen je PI-like fuzzy regulator, koji upravlja ventilom za dovod hladne vode na izmenjivač toplote KGH sistema. Izvršena je optimizacija fuzzy tabele pravila pomoću genetskih algoritama.
SMART CITY – NOVI SAD MODEL PRAĆENJA JAVNOG SAOBRAĆAJA
Authors: Jančić Ivan , Popov Srđan
Published: January 2020

U radu je predložen model implemen­tacije sistema koji krajnjim korisnicima omogućava praćenje GPS lokacije autobusa u realnom vremenu na području Novog Sada.
PROJEKTOVANJE AKTIVNOG NISKOPROPUSNOG FILTRA U 0,18 µm CMOS TEHNOLOGIJI
Authors: Nikolić Kristina
Published: January 2020

U ovom radu je projektovan aktivni Batervortov niskopropusni filtar šestog reda u 0,18 μm CMOS tehnologiji. Topologija se sastoji iz kaskadne veze tri filtra drugog reda. Filtar drugog reda je projektovan korišćenjem Salen-Ki topologije koja se sastoji iz dvostepenog operacionog pojačavača, dva otpornika i dva kondenzatora. Projektovani filtar ima maksimalno slabljenje u propusnom opsegu 9,5217 mdB i minimalno slabljenje u nepropusnom opsegu 50 dB. Granična učestanost je 52,3 kHz, a potrošnja kola 2,27 mW.
STEGOSPLOIT U SISTEMIMA ZA PRENOS I PRIKAZ DIGITALNIH SLIKA
Authors: Mišić Aleksandra
Published: January 2020

U ovom radu predstavljena je vrsta napada pod nazivom stegosploit. Opisan je postupak kreiranja malicioznog fajla, načini za isporuku fajla  žrtvi, kao i načini odbrane od ove klase kiber pretnji.
Well-Testing, In-Situ Fluid Sampling, and Stress Determination Methods for Unconventional Reservoirs
Authors: Azari Mehdi , Hashmi Gibran , Hamza Farrukh , Tahani Hoda
Published: January 2020

Traditionally, production potential evaluation of newly drilled wells is determined with a drillstem test (DST) or a wireline formation tester to make decisions. Applying such techniques in unconventional formations is not always that easy owing to extremely tight formations that do not allow significant natural flow. Obtaining representative downhole fluid samples is also a major issue in unconventional wells. Unconventional gas condensate wells produce water for a long period after hydraulically fracturing the formation. Conventional fluid sampling acquires mostly water; surface sampling is not representative because the gas, condensate, and water flow rates change with slugs of fluid flowing to the surface.

To obtain undisturbed fluid samples, a new wireline formation tester technique was developed for unconventional formations. This method uses straddle packers to isolate a section in the wellbore to pump into the formation and create a fracture. Because these tight formations have limited invasion during drilling, they clean up faster during the pumping out period, with the created higher surface area increasing the flow rate. Formation mechanical properties, such as fracture initiation, instantaneous shut-in pressure (ISIP), fracture closure and opening pressures, and fracture extension pressure will all be obtained for this new microfracturing and fluid sampling technique.

Several well testing applications are discussed with corresponding analyses pertaining to unconventional gas and gas condensate wells in addition to some case studies for tight oil formations. The results provided valuable information to optimize production and evaluate reservoir potential. For example, a tight gas well was hydraulically fractured and did not produce after fracture stimulation because of water blockage; therefore, an injection/falloff test was recommended by injecting nitrogen into the formation and analyzing the falloff test. The well test analysis revealed that the early screenout caused an ineffective fracture length. The well was then refractured and has been producing since.

One of the issues with unconventional wells, particularly in tight gas wells, is that the wellbore storage lasts much longer than in standard wells. A downhole shut-in tool, or any test that minimizes the wellbore storage effects, can greatly reduce the duration of such tests and help improve the quality of the analysis results. A new extended diagnostic fracture injection test (DFIT) conducted with a downhole wireline operation that alleviated the problem of high wellbore storage and obtained pressurized pressure volume temperature (PVT) quality samples is also discussed. Because of controlled rates with an injection/falloff test in low-permeability wells, faster flow stabilization can be achieved, resulting in shorter wellbore-storage duration. This technique can obtain well and reservoir information in a shorter period of time than a conventional pressure-buildup test.
Human Performance Tools Enhancing Fatality Prevention by Assuring Presence of Safeguards
Authors: Alsaqour Ali
Published: January 2020

Eliminating fatalities and serious injuries amongst the workforce is of paramount importance of every Fatality Prevention policy or system. This abstract explores Best Practice of Save Your Life Actions / Start-Work Checks Fatality Prevention initiative with an ultimate objective of eliminating fatalities resulting from Human failure to safely execute work primarily by reducing Human-error rate.

The initiative starts with Identifying and understanding risks of hazardous work activities of high potential consequences and safeguards to prevent or mitigate these consequences, then, developing two Human Performance tools to reduce human-error rate. The first, Save Your Life Actions, provides clarity on critical safeguards to improve ability to assure workforce knowledge and reinforce consistent execution. The second, Start-Work Checks, is a verification tool completed by a Start-Work Verifier prior to starting work and focuses on assuring that all critical Safe Guards are positively verified being in place and functioning immediately prior to work execution 100% of the time.

After first year of implementation by an international oil company, these tools have not only contributed on exceeding all 2018 Workforce Safety milestones, they also contributed on marking a significant milestone, the first calendar year without a workforce fatality in its long history. The milestones of serious injuries have greatly improved as well. The monitoring, assessments and feedback of the initiative have shown enhancement in workforce's knowledge on the high potential consequence activities and critical Safeguards leading to clear reduction in human-error rate. As Fatality prevention is not a task that to be completed and left behind, continual improvement process identifies gaps and opportunities to strengthen and improve safeguards. This has clearly set the next step in this journey, that is introducing a Verification and Validation Coaching program. This program has the objective of enhancing workforce competency and confidence in application of safe work management system through on-site engagement by expert coaches with the front-line workers to closely observe work and provide feedback, anonymously, to workers. Pilots, already implemented in some upstream operations, have shown drastic improvements in both Human Performance and Safeguards Assurance measures.

From a Human Performance perspective, Safety is not about eliminating incidents, but is about presence and functionality of Safeguards. People make mistakes and human-error rate is to be reduced when executing high potential consequence works by assuring and enhancing their knowledge and competency on critical safeguards. Implementation of such tools, Save Your Life Actions and Start-Work Checks followed by the Verification and Validation Coaching Program, will be highly beneficial to the industry towards Fatality Prevention.
Deep EM Method for Proactively Prediction of Resistivity ahead of Bit to Determine Salt Bottom Position
Authors: Guo Qing Bin , Hao Xiang Bao , Wu Chao , Seydoux Jean , Wang Chao , Shim Yen Han , Liu Yan Mei
Published: January 2020

Most wells in TOC block A need to be drilled through the salt formation, which is always with troubles, like high-pressure salt water, mud loss, stuck pipe etc. Furthermore, the salt formation has great heterogeneity, thickness and depth of the salt different from well to well. For these wells, it's very important to drill through the salt formation safely then set casing accurately at the bottom of it. The common practice for client is to drill using small bit and then reamer to large hole through the salt formation, which is costing time and large uncertainty in salt formation detecting. The deep EM look-ahead method application aims to help client to predict the bottom of salt formation, then set casing to the right place.

This new approached method in this paper based on deep EM technology can detect formation features, especially development for measuring resistivity contrasts ahead of the bit in real time to reduce cost and risk during drilling operations. It provides a step change with regard to precision in detecting changes in resistivity properties ahead of the bit in vertical and low-angle wells. This method can reduce mainly drilling risks and improve landing but detecting potential drilling hazard and reducing depth uncertainty ahead of the bit. The main application of this method in this paper is to detect salt bottom ahead of bit.

Using this method, we can now finally drill and react pro-actively on formation resistivity properties several meters ahead of the drill-bit, instead of drilling reactively on resistivities at or behind the bit. After one well application, we successfully helped client detecting the bottom of formation and setting case to the right depth.

In this paper, a pilot project case will be discussed detailly featuring successful application of EM method to react pro-actively on formation resistivity changes ahead of bit, helping client reducing drilling risks.
A Case Study: Deployment of RFID-Enabled Remote Operated Circulating Toe Sleeve in ERD Wells
Authors: Ng Nicholas YX , Murdoch Euan , Shuja Atif , Vazquez Karina
Published: January 2020

In the quest to increase production, extended-reach drilling (ERD) has become a popular approach. However, it is recognized that there are challenges associated with ERD wells. Longer and more complicated well profiles incur substantial operational risks during well construction and completion phases. In most cases, conventional completion systems which require well intervention during installation are not suitable for ERD wells. A new generation of completion system is required to address the challenges. While some categories of interventionless equipment, such as intelligent completion systems, have been made available decades ago, these devices carry limitations which often restricted their application in ERD wells. Most of the intelligent completion systems require control lines to operate. The requirement of control lines not only incurs extra cost to operators but also poses difficulties to run these systems into long horizontal wellbores.

Radio frequency identification (RFID) technology has emerged as a promising solution in recent years. The RFID technology uses electro-magnetic waves to establish communications with downhole tools, realizing wireless or "control-line-less" operations. The RFID technique adopted by the oil and gas industry utilizes passive tags which can be made in small sizes and at low cost, suitable for downhole applications. A recent field development campaign which adopted RFID-enabled downhole tools has showed the benefits that RFID technology can bring to the industry. In this campaign, the operator required a remote operated liner toe isolation device. The device would need to be run open to allow circulation during deployment of the lower completion and would be remotely closed to create a barrier at the toe after lower completion installation and well fluid displacement. An RFID-enabled remote operated circulating toe sleeve was developed, delivered and deployed.
Onstream Safety Performance in a Glimpse
Authors: Al-Noaimi Reem E. , Al-Khayat Sultan T. , Al-Amer Ahmed T.
Published: January 2020

The Unconventional Resources (UR) Gas Operations has recently been developed to deliver the first unconventional production to its customers, to produce, process and pipeline gas to satisfy energy demand and support the potential future development, and reduce the liquid burning at power generation facilities. This organization handles unique, scattered and unmanned facilitates, where each facility operates differently based on the geographical nature of the field. For start-up, best practices were leveraged from for Unconventional Gas companies around the world. This includes reviewing and incorporating latest technologies to meet the business challenges of unconventional gas at the lowest cost, and most importantly, safest operations.

As a new operating organization, UR Gas Operations had to define their major processes for achieving the objective of delivering customer expectations safely. These processes include the implementation of a Safety Management System (SMS) to enable control and management over plant safety, maintenance and reliability. With the help of advanced digitalization, SMS processes are being automated to maximize their effectiveness and efficiency. SMS acts as one platform that integrate the safety processes of different facilities under one umbrella. Furthermore, SMS is a critical pillar of Operational Excellence, it involves a set of defined processes that are measured through KPIs to comply with the company's safe operations which was named "SMS Online"

Developing SMS Online have a positive impact on two key stakeholders in UR; Gas Operations Engineers, and Gas Operations Management. The SMS Online is a visualization platform for the safety performance KPIs across the UR Gas Operation organization. Hence SMS enforces accountability for proper KPI tracking and reporting, with compliance to safety processes. In addition, SMS Online creates an environment that supports engineers with their daily safety revisions, tracking, guidance, etc. This portal has increased the accessibility to safety processes across the organization by having a friendly user interface that navigates through SMS elements and processes. The system also provides an automated tracking system for assigning and managing action items assigned against individuals that alert actionees for closing an item prior to the deadline through an alerts and notification system.

In a majority of the industrial facilities around the world, there is a big gap between building a new facility and being fully developed Business Operating Company. A comprehensive vision and a check list of essential Information Technology and Operational Technology systems was put in place to support business readiness for safe and efficient plant start up. SMS Online was a key component of this strategy, which was developed in-house by the UR IT as the first automated safety management system in the UR.
Successful Deployment of a Laboratory Information Management System LIMS; Striding Towards Modern, Paperless Labs
Authors: Junaid Sameer , Jangda Zaid
Published: January 2020

The selection, implementation and benefits of a fully customized Laboratory Information Management System (LIMS), which was deployed in the laboratories of the College of Petroleum Engineering & Geosciences (CPG) at the King Fahd University of Petroleum & Minerals (KFUPM) is discussed. It is one of the innovative initiatives undertaken by CPG to streamline utilization of its facilities and ensure secure data management.

The sheer volume and diversity of experiments and measurements performed in the laboratories of CPG required that the management of equipment, data and information be done in a secure and professional way. This required an electronic system, which is efficient, robust and customizable to the specific requirements of the College. Eight different systems were meticulously reviewed and evaluated, from which a system was selected which allowed full customization and strong local support. The implementation was done in multiple phases with extensive training to ease the shift from the traditional lab practices to a complete electronic system.

With the implementation of this system, the College can fully track the existence of all equipment in each laboratory, their maintenance and calibration history and keep a comprehensive record of experiments and results. LIMS has also enabled CPG to compile and deploy standard operating procedures or Lab Execution System (LES) for all major equipment in the labs. The Sample Lifecycle feature allows users to login their samples and produce the complete sample report including the analysis, calculations, graphs and images within the LIMS. It also ensures that the sample follows the defined test methods and procedures. Barcode scanning and printing of customized labels further enhance the credibility of the tested samples. A recent upgrade has given users access to the system directly from the web, making it possible to use the system from anywhere. The system has been additionally customized to handle the management of OHS&E, car-pool and the e-learning facilities of CPG. Interactive live dashboards enable the users and management to view the system with critical information and data at-a-glance.

The CPG customized LIMS has proven to be very effective in our laboratory activities as it has improved the efficiency and quality of work by reducing the potential of human errors, accelerating the throughput of analysis, and enabling sample tracking activities. It is an essential step in the transitioning of CPG laboratories to fully paperless labs where all the data is stored and managed in a fully secure environment.
Simple Optimized Module for Flared Gases Recovery
Authors: El-Khashab Amr , El-Maghraby Adham , Bendary Mohamed , Taman Hassan
Published: January 2020

Flaring wastes a valuable source of energy, also it contributes to air pollution problems through adding significant carbon emissions to the atmosphere.

Associated gases produced with crude oil at remote oil production fields are currently directed to flare. Globally, due to the increase in both environmental constraints and energy demand, flaring is often prohibited.

Company investigated and conducted a study for the design of a module for LPG extraction form flared gases and provided cost estimate, and preliminary process description as developed in the simulation program conducted for average composition of gases from different production facilities.

It is important to highlight that during the study of the scheme that should be used, different alternatives have been considered.

The scheme consists of applying solvent extraction technology to recover heavy components (LPG and Condensate) from flared gases without the need of chilling (by refrigeration system) or LTS. The utilized solvent could be any hydrocarbon liquid that has high affinity for C3+ absorption.

The Project Terms of Reference nominates a small-scale recovery plant to process 5 Million Standard Cubic Feet per Day (MMSCFD) to produce the following products:

40 MTPD LPG

12 MTPD Condensate

3.24 MMSCFD Sales Gas

A financial evaluation of the project, based on a standard discounted cash flow (DCF analysis, has been undertaken based on budgetary offers, capital cost estimates and operating cost estimates. The results of this economic model are presented in Table 1

Results of the Economic Model

This unit provides solution for problems caused by flared gases in the petroleum industry specifically in remote oil and gas wells which are mentioned below:

Minimize emissions to environment in line with the green environment program instructions.

Recover valuable products as LPG from flared gases.

Enhance the production from oil wells formerly closed due to presence of flared gases.
Artificial Intelligence and Machine Learning Techniques Provide Operations Geologists With an Automated and Reliable Lithology-Fluid Pattern Recognition Assistant: A Case History in a Clastic Reservoir in West Africa
Authors: Baldini Davide , Piazza Luca , Barbanotti Luca
Published: January 2020

AI is beginning to take on a key role in assisting geologists during well data collection and analysis. Thanks to AI assistants, geological well data can be quality controlled, cleaned, prepared and then paired with preliminary pattern tags in order to automate interpretation processes. Geologists still remain in charge of reviewing and consolidating AI provided interpretations, instead of interpreting raw data from scratch. This paper describes how AI supported the interpretation of lithology and fluid type in a Cretaceous clastic reservoir in West Africa.

An AI assistant supported by AI algorithms has been trained to recognize five different lithology-fluid patterns of interest: Claystone, Sandstone-Oil, Sandstone-Gas, Sandstone-Water and Limestone-Water. Training and validation phases have been run against data from more than 20 different wells. Data gathered consisted of few tens of input variables, spanning from LWD logs, to GAS variables and drilling parameters. Overall, the training dataset consisted of more than 125k examples, corresponding to approximately 19 kms of geological sampling. Several algorithms and modelling strategies have been evaluated within a recursive prototyping framework. Gradient Boosting, Random Forest and Neural Networks supervised machine learning algorithms, coupled with both unsupervised and optimized hyper - parameters tuning approaches, have been compared and selected to achieve better tagging performances.

Gradient Boosting algorithm, when supported by hyper-parameter tuning based on genetic algorithm, results to outperform Random Forest and Neural Networks, together with any alternative approach among those evaluated. More specifically, tagging accuracy achieved on both, validation and holdout samples, demonstrates an encouraging understanding of Sandstone-Oil, Sandstone-Gas, Sandstone-Water and Claystone.

This alternative AI enabled workflow – when applied in real time - could provide a significant added value by decreasing the time needed to identify the best strategy case-by-case and consequently the time-to- production for each new well.
Washpipe-Free Installation of Sand Screen with Check Valve Inflow Control Devices ICD
Authors: Kumar Amrendra , Gadiyar Balkrishna , Parlar Mehmet , Anikanov Evgeny , Dikshit Ashutosh , Rudic Aleksandar , Woiceshyn Glenn , Jurgensen Camilo , Petukhov Pavel
Published: January 2020

Sand control screens are typically installed with an internal string (washpipe) which, among other functions, provides a circulation path. In long horizontal wells, running a washpipe consumes considerable rig time and may limit ability to reach target depth. In cases where fluid losses are experienced after screen installation, isolating the open hole with a fluid loss control valve can take a long time. This paper describes a washpipe-free solution for screen installation using a check valve ICD.

ICD screens are commonly used to delay/restrict influx of unwanted fluids such as gas or water. The washpipe-free solution integrates a check valve with the ICD to prevent outflow through the screen during circulation and allow inflow through the screen when placed on production. This solution uses a check ball that seals against the ICD during circulation but falls back on a porous retainer plate during production. The check ball and retainer plate can be dissolved by spotting a reactive fluid inside the screen or made to erode over time with production.

Laboratory testing yielded the following results: 1) ICD with the check ball was shown to seal up to 5,000 psi, 2) Check ball and retainer plate can be dissolved by a reactive fluid which can be tailored to bottom hole temperature and required time of dissolution, 3) Pressure activation test demonstrated maximum differential pressure to seat the ball is less than 5 psi.

This check valve ICD solution has been applied worldwide in more than 35 wells, most of which were targeted to avoid running a washpipe. However, in two wells the technology was successfully used to set open hole packers with 5,000 psi setting pressure. Washpipe-free ICD screen installation with a dissolvable check valve and capability of setting hydraulic packer without washpipe or intervention in open hole are novel solutions presented in this paper.
A Subsurface Sectorization Workflow for Assessing Reservoir Properties, Screening for Remaining Hydrocarbon Volumes and Ranking of EOR Methods to Improve the Reservoir Ultimate Recovery Factor
Authors: Gerges Nader , Rihet Jeremy , Walley Stuart
Published: January 2020

Enhanced Oil Recovery (EOR) strategies are becoming increasingly common in the Middle East, used primarily for increasing recovery factors from mature fields. The final location, selected for any EOR scheme, is often critical to its ultimate success and developing new methods to investigate the most optimal EOR schemes can add significant value in optimizing recovery from mature fields. One approach for a given field, is to subdivide 3D Geo-cellular models into different sectors and perform a statistical analysis of the 3D model's properties (porosity, permeability, saturations, etc.) in each individual sector. This task is usually performed manually and can be resource intensive and time-consuming. In particular, in the case of large mature fields in the Middle East, the scale and data volume involved often makes the workflow impractical to implement. Advanced ‘automation methods’, developed to rapidly generate EOR sectors and perform the statistical analysis of 3D model properties are therefore necessary. This work presents a new workflow implemented for extracting and analyzing model properties at a scale relevant for EOR planning in large scale Middle East Fields.