bluuebunny/crossref_metadata_2025 huggingface dataset:
Interaction hub critical for telomerase recruitment and primer-template handling for catalysis
Authors: Padmanaban Shilpa , Tesmer Valerie M , Nandakumar Jayakrishnan
Published: March 2023

Telomerase processively adds telomeric DNA repeats to chromosome ends using catalytic protein subunit TERT and a template on its RNA subunit TR. Mammalian telomerase is recruited to telomeres by the TEL patch and NOB regions of shelterin component TPP1. Recent cryo-EM structures of human telomerase reveal that a composite TERT TEN–(IFD-TRAP) domain interacts with TPP1. Here, we generate TERT mutants to demonstrate that a three-way TEN–(IFD-TRAP)–TPP1 interaction is critical for telomerase recruitment to telomeres and processive telomere repeat addition. Single mutations of IFD-TRAP at its interface with TR or the DNA primer impair telomerase catalysis. We further reveal the importance of TERT motif 3N and TEN domain loop99FGF101in telomerase action. Finally, we demonstrate that TPP1 TEL patch loop residue F172, which undergoes a structural rearrangement to bind telomerase, contributes to the human–mouse species specificity of the telomerase–TPP1 interaction. Our study provides insights into the multiple functions of TERT IFD-TRAP, reveals novel TERT and TPP1 elements critical for function, and helps explain how TPP1 binding licenses robust telomerase action at natural chromosome ends.
Resipatisme: A psychoeducation to reduce the tendency of klithih behavior in adolescents
Authors: Oktavia Detty Putri Pratiwi , Zulhida Nur Azmi , Rachim Laila , Affan Ahmad , Fitrianingsih Wulan Suci , Kushartati Sri
Published: March 2023

Klithih, a Javanese term, was originally an ordinary night stroll without a clear purpose. Klithih becomes an act of violating the law if it is accompanied by aggressive or violent behavior. In recent years, klithih cases in Yogyakarta have increased and become public attention, with almost the average perpetrators being students. This study aimed to reduce aggressive behavior in adolescents with a tendency to klithih behavior by developing Resipatisme, a psychoeducation intervention consisting of emotion regulation, empathy, assertiveness, and altruism. A quasi-experimental quantitative method, with one group pretest-posttest design, was applied in this study. An aggressive behavior scale was used to collect the data. The Wilcoxon Signed Rank Test was applied to compare the data before (pretest) and after (posttest) intervention. The results show a significant difference between pretest scores and posttest scores. This finding implies that Resipatisme psychoeducation can reduce aggressive behavior in adolescents. Therefore this psychoeducation may be applied to prevent the tendency of klithih behavior.
Princípios e diretrizes para o consumo consciente e responsável na moda: uma busca sistemática da literatura
Authors: Livramento Nishimura Maicon Douglas , Triska Ricardo
Published: March 2023

Considerando a insustentabilidade da produção e do consumo contemporâneo no setor de moda, além das controversas ações corporativas para mitigar o impacto ambiental, social e econômico, objetiva-se levantar quais são as pesquisas que abordam princípios e diretrizes para o consumo consciente e responsável no setor de moda. Para tanto, procede-se à pesquisa de caráter exploratório e de abordagem quantitativa, baseado no método Systematic Search Flow (SSF) para levantamento de dados, e análise de conteúdo para análise de dados. Desse modo, observam-se poucas pesquisas na área, abordando principalmente as temáticas cadeia de suprimentos, consumo consciente e Responsabilidade Social Corporativa (RSC). A partir da busca, não foram encontrados estudos que tratam de princípios e diretrizes, mas apenas de recomendações para o consumo consciente e responsável no setor de moda. Apesar disso, observam-se recomendações na direção dos governos para liderarem o desenvolvimento sustentável e para que o consumidor seja participante ativo nesse processo, além de certa inquietação à postura da indústria e do varejo.
Miradas de Mujeres, um olhar feminino
Authors: Demetrescu Sylvia
Published: March 2023

“Miradas de Mujeres é uma exposição que destaca o olhar da artista belga Isabelle de Borchgrave sobre a artista mexicana Frida Kahlo. Miradas de Mujeres homenageia um diálogo entre duas mulheres que nunca se conheceram – a primeira nasceu pouco antes da morte da segunda – mas que, no entanto, compartilham o mesmo amor por tecidos para Frida/papéis para Isabelle, elementos decorativos, objetos, plantas e cores. Afinal é o olhar de uma mulher da atualidade, sobre o que representa o papel das artistas na sociedade…talvez uma exposição das cores do México. [...]
Moda: imagens com narrativas curiosas
Authors: Maciel Eduardo
Published: March 2023

Como um ser visual que sou, moda pra mim sempre foi imagens com narrativas curiosas. E foi esse prazer em ler essas mensagens que um dia me fizeram virar, entre outras coisas, um pesquisador de consumo e construção de identidades de moda de grupos com fortes verdades culturais. [...]
Pensar o consumo de moda, o consumo e a moda
Authors: Faria dos Santos Tessari Valéria , Bonadio Maria Claudia
Published: March 2023

Esta é a primeira edição da dObra[s] de 2023! Que seja um ano de reencontros e de reparação. Já estamos firmes no trabalho! Estabelecendo novas parcerias com colegas querides que propõem novos dossiês, planejando incrementar os usos de redes sociais e nos dedicando a inserir a revista cada vez mais nos indexadores. O resultado mais recente do nosso trabalho em equipe é este novo número, que conta com o dossiê “Consumo de moda em abordagens filosóficas: reflexões a partir das relações intermediadas por dinâmicas de consumo”, organizado por Ana Paula Celso de Miranda (Universidade Federal do Rio de Janeiro) e Olga Maria Coutinho Pépece (Universidade Estadual de Maringá). [...]
Caracterización analógica y digital de las televisiones comunitarias activas del departamento del Tolima, Colombia
Authors: Angulo Rincón Lizandro , Mesa Galicia Marisol , Avendaño Ramírez Diego Fabián
Published: March 2023

Desde un enfoque cualitativo, diseño de investigación-acción y la aplicación de métodos como la cartografía social, entrevista a profundidad, grupo focal y etnografía digital, la investigación aquí referida caracterizó las televisiones comunitarias activas en una provincia colombiana, para conocer su funcionamiento, pertinencia social, identificar las causas de su desaparición y proponer acciones de fortalecimiento en su tránsito hacia narrativas transmedia. Las conclusiones esbozan las pistas que posibilitarían un mejor aprovechamiento por parte de esas organizaciones de la normatividad recientemente promulgada para la promoción de la industria audiovisual y la instalación de internet 5G en las zonas rurales de Colombia.
Evaluación figuroanalógica en la Fundación Albert Einstein, hacia el desarrollo del razonamiento analógico del niño como ciudadano creativo
Authors: Lozano Herrera Eusebio , Forero Jiménez Stefanía , Báez Peñuela Marcela Carolina , Salamanca Rivera Ángela Rocío , García Gutiérrez Zaily del Pilar
Published: March 2023

Este este capítulo aborda la experiencia de evaluación figuroanalógica realizada en una institución educativa de primera infancia como parte de una propuesta educativa de Filosofía para Niños. Adscrito en la macroinvestigación “Ciudadanía creativa desde el fomento del pensamiento crítico, ético y creativo en niños y niñas de primera infancia como actores sociales y constructores de paz”, este capítulo se propone presentar los resultados directamente relacionados con la contribución de la evaluación figuroanalógica en el desarrollo de pensamiento multidimensional del niño como ciudadano creativo. Como categorías teóricas se aborda la evaluación como un acto intrínseco del proceso aprendizaje, desde allí se profundiza en la evaluación figuroanalógica y la habilidad de razonar analógicamente. Se desarrolla una metodología cualitativa, bajo el método de investigación acción educativa y se recolectan datos mediante la observación participante y la ficha de observación de la evaluación fíguroanalógica. En los hallazgos se encuentra que los niños tienen capacidad para establecer juicios a partir del criterio figurativo y analógico, en tanto establecen comparaciones para la autocorrección y la generación de pensamiento autónomo. Finalmente, en las conclusiones, se reconoce la capacidad de razonar como el principal aporte de la evaluación figuroanalógica en la consigna de potenciar el pensamiento multidimensional en la primera infancia.
Troubles Upon Troubles: Do Adverse Childhood Experiences Impact Rehabilitation?
Authors:   , Te Hiwi Erika
Published: March 2023

In Aotearoa/New Zealand rates of child maltreatment are high. Amongst prison populations rates of child maltreatment as well as psychological disorders, including PTSD, are disproportionately high. However, little attention has been given to the impact of maltreatment in childhood on treatment of those in prison. The current research sought to provide a representative picture of the extent of maltreatment amongst high risk violent offenders who have attended Special Treatment Unit programmes in Aotearoa/New Zealand prisons. Further, we evaluated the association between both childhood maltreatment levels and PTSD symptoms on one side and their treatment progress and completion on the other. Lastly, we analysed whether maltreatment levels or PTSD symptoms altered the risk for violence from pre- to post- programme for those who managed to complete treatment.

Consistent with previous literature, the prevalence of maltreatment amongst the sample (N=423) was much higher than has been shown to exist in the general population, with 82% reported to have experienced at least one type of abuse or neglect. As predicted, the number of types of maltreatment was significantly associated with likelihood of participants’ exit from treatment as well as lower treatment progress, however PTSD symptoms were not. Neither childhood maltreatment nor PTSD symptoms were found to significantly affect the change in VRS score from pre- to post- treatment. Despite the striking finding of past maltreatment experiences over current PTSD symptoms relating to treatment outcome, the pathways from childhood maltreatment to difficulty progressing in and completing rehabilitation programmes remains unclear. Nonetheless these findings add weight to Adam’s (2002) claim that the pervasive experience of childhood maltreatment amongst forensic populations is key issue for forensic psychologists. Further integration of practices informed by trauma care, as has been established for female prisoners, warrants further investigation.
PENGEMBANGAN MULTIMEDIA INTERAKTIF BERBASIS FLASH PADA MATERI TITRASI ASAM BASA
Authors: Hutama Mochamad Wahyuda Putra , Hidayah Rusly
Published: March 2023

Penelitian ini bertujuan untuk mengetahui kelayakan multimedia interaktif berbasis flash untuk meningkatkan hasil belajar pada materi titrasi asam basa ditinjau dari kevalidan, kepraktisan dan keefektifan. Penelitian ini menggunakan metode penelitian dan pengembangan (Research and Development / R&D) yang dibatasi pada tahap ujii coba terbatas. Kevalidan ditinjau dari validitas isi, validitas konstruk, kualitas intruksional, dan kualitas teknis. penilaian dilakukan oleh 2 dosen kimia Universitas Negeri Surabaya dan 1 guru kimia SMK Semen Gresik. Pada kepraktisan ditinjau dari hasil observasi peserta didik dan angket respon peserta didik. Keefektifan ditinjau berdasarkan hasil pembelajaran peserta didik. Hasil penelitian didapatkan persentasi rata-rata hasil validasi sebesar 88,96% dengan kriteria sangat valid. Berdasarkan kepraktisan didapatkan hasil persentase rata-rata sebesar 89,165% yang masuk dalam kriteria sangat praktis. Keefektivan mendapatkan hasil ketuntasan klasikal sebesar 100% dengan rata-rata nilai yang didapatkan sebesar 88,34%. Hasilnya dapat ditarik kesimpulan berupa multimedia interaktif yang dikembangkan layak untuk digunakan dalam media pembelajaran guna melakukan peningkatan terhadap hasil belajar peserta didik.
IMPLEMENTASI LEMBAR KERJA PESERTA DIDIK (LKPD) BERORIENTASI MIND MAPPING PADA MATERI REDOKS UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KREATIF
Authors: Maulidy Gunur Mutia , Mitarlis Mitarlis
Published: March 2023

Penyelenggara pendidikan pada abad ke-21 di era revolusi industri 4.0 peserta didik dituntut harus memiliki keterampilan 4C dalam proses belajar. Keterampilan 4C yaitu keterampilan critical thinking, communication, creative thinking, dan collaboration. Penelitian ini bertujuan untuk mendeskripsikan keterlaksanaan pembelajaran menggunakan LKPD berorientasi mind mapping, mendeskripsikan aktivitas siswa saat pembelajaran, mendeskripsikan peningkatan hasil belajar siswa, mendeskripsikan kemampuan berpikir kreatif siswa, serta mengetahui respon siswa terhadap pembelajaran menggunakan LKPD berorientasi mind mapping khususnya pada materi redoks. Metode penelitian yang digunakan ialah one group pretest-posttest design tanpa adanya kelas kontrol. Instrumen yang digunakan adalah lembar pengamatan keterlaksanaan pembelajaran, lembar observasi aktifitas peserta didik, lembar soal pretest dan posttest, dan angket respon peserta didik. Hasil penelitian menunjukkan bahwa keterlaksanaan pembelajaran kimia pada materi redoks pada pertemuan pertama dan kedua berjalan dengan rata-rata pada pertemuan pertama sebesar 97% dan pada pertemuan kedua sebesar 97% dalam kategori baik. Hasil peningkatan pemahaman peserta didik terhadap materi redoks dibuktikan dengan perhitungan N-gain yang didapatkan 0,75 kategori tinggi. Keterampilan berpikir kreatif peserta didik dilihat melalui hasil pembuatan mind mapping yang digolongkan menjadi tiga kategori, yakni sangat baik sebesar 35,7%, baik sebesar 28,6% , dan sebesar 35,7% cukup baik.
DEVELOPMENT OF E-COMIC LEARNING MEDIA FOR REDUCTION AND OXIDATION MATERIAL BASED ON FLIP PDF PROFESSIONAL ON THE DISCOVERY LEARNING
Authors: Syahrani Rafidah Amalia , Jusniar Jusniar , Hardin Hardin
Published: March 2023

This research and development aims to produce a valid, practical, and effective e-comic reduction and oxidation reaction based Flip PDF Professional. The development of this e-comic refers to the ADDIE development model which includes the analysis stage, the design stage, the development stage, the implementation stage, and the evaluation stage. The subjects in this study were 2 media experts and material experts, 1 people of chemistry teacher, and 30 students of class X MIPA 2 SMA Negeri 14 Makassar. The instruments used for validity are validation sheets by media experts and material experts, practicality, namely observation sheets on the implementation of e-comic, teacher and student response questionnaires, and learning outcomes tests. The results of this study are: (1) the validity of the digital comic from the media expert is 3.72 and the material expert is 3.75 which is in the very valid category with a consistency test between validators are 100% which is in very high criteria, (2) the average percentage of e-comic practicality is 97%, where the percentage of practicality based on the questionnaire responses of teachers and students to digital comic are 100% and 90,55% in the very practical category, 3) e-comic meet the effective criteria (≥85%) based on the achievement of class completeness with percentage 86.67%. Based on these data, it is concluded that the e-comic reduction and oxidation reaction based Flip PDF Professional developed with the ADDIE model is valid, practical, and effective for use in learning
FROM THE REVOLUTION TO GNOSTICISM: MIKHAIL KUZMIN IN THE AUTUMN OF 1917
Authors:   HSE University, Pakhomova Alexandra S.
Published: March 2023

The article analyzes Mikhail Kuzmin’s poetic cycle Sofia. Gnostic Poems (1917–1918) in the context of his political position in the second half of 1917. Contrary to the assumptions that this cycle, inspired with Gnostic symbolism, became Kuzmin’s way of escapism and his departure from actual problems, a new interpretation of the cycle is proposed. Analysis of the poetics and pragmatics of the cycle against the background of his other works and diaries of 1917 suggests that the gnostic theme has become the way of his mystical understanding of the revolution. Taking into account the fact that the poems were written during a period when Kuzmin shared revolutionary enthusiasm and welcomed both the February and October revolutions. The central Gnostic myth, the descent of Sophia, Kuzmin juxtaposed onto current events, trying to see in the revolution a project for a radical reorganization of the world and the spiritual renewal of man
THE MOTIF OF THE “SEVEN SACRAMENTS” IN RUSSIAN ART OF THE 17TH CENTURY AND ITS BOOK SOURCE
Authors:   The Program Systems Institute of RAS, Sukina Liudmila B.
Published: March 2023

The article deals with a rather rare for Russian art of the 17th century story of the Seven Sacraments. Its source was the engravings of the printing house of the Kyev Pechersk Lavra, which were among the book “projects” of the head of the Kyiv Metropolis of the Constantinople Orthodox Church, Petro Mohyla (1632–1647). A few images of that motif have long been known to researchers, but the origin of its variations has not been revealed. The issue is studied on the examples of two icons of the last quarter of the 17th century “Crucifixion with the Seven Sacraments”. Their distinguishing feature is the depicting the optional for all Christians sacrament of marriage in the foreground. The author of the article suggests that the creation of such an iconography was associated with the marriage of Tsar Feodor Alekseyevich. The development of baroque aesthetics also prompted artists to combine elements of different iconographic schemes in one composition and create a complicated version of the Life-Giving Tree with scenes of the seven Sacraments and the Passion of Jesus cycle. They used several literary and visual sources. The surviving samples of such a composition demonstrate the variability of its iconography and the creative nature of the work of Russian icon painters in the 17th century, who could create completely independent works on the same subject with pronounced individual characteristics.
Ibero-Romance Studies: Volume 20
Authors: Obolenskaya Y.
Published: March 2023

A festschrift for Yulia Obolenskaya, Professor Emeritus of Moscow State University, Doctor of Sciences (Philology), follow the XIth International Conference “Ibero-Romance Studies in the Modern Word: Academic Paradigm and Current Challenges”, held by the Ibero-Romance Department of the Philological Faculty at Lomonosov Moscow State University on November 24th and 25th, 2022. The articles embrace a wide range of issues in Ibero-Romance studies, including language and literature studies, fine arts, historical and cultural studies. For specialists in Romance studies, journalists, historians, philosophers, researchers in fine arts and cultural studies. The articles are copy-edited by their authors.
Using detrending methods for intelligent processing of construction process monitoring data
Authors: Kagan Pavel , Parshin Dmitriy
Published: March 2023

Data processing of monitoring systems of various processes at the stage of construction and operation of buildings requires the development of special tools that belong to the field of artificial intelligence. The trend removal method is one of the ways to preprocess data collected from various sensors and IoT devices that monitor the state of buildings, structures and soil masses during construction and operation. This article analyzes how different approaches to detrending time series affect the performance and accuracy of algorithms for CI computational intelligence models. The analysis compares three approaches: linear detrending, non-linear detrending, and first-order differentiation.

Five representative methods are used as CI models: DENFIS dynamic evolving fuzzy neural network, GP Gaussian process, MLP multilayer perceptron, OP-ELM optimally trimmed extremal learning machine, and SVM support vector machine. There are three main conclusions from the experiments performed on the four datasets: 1) detrending does not improve overall performance, 2) the empirical mode decomposition method provides better performance than linear detrending, and 3) first-order differentiation in some cases can be effective and in some cases counterproductive for series with common patterns.
Acercamiento a los estudios sobre el derecho indígena
Authors: Cruz Rueda Elisa
Published: March 2023

Se reseñan los aspectos centrales de la obra Estudios en derecho indígena del Dr. Jacobo Mérida Cañaveral. Abordamos los ejes centrales de la discusión que el autor plantea a lo largo de los cuatro capítulos que conforman el texto. El autor hace una reflexión sobre el contexto teórico e histórico en el que se desenvuelve el derecho indígena. El libro tiene un doble propósito: de consulta para juristas y como libro de texto para profesores y alumnos de la carrera de Derecho, ya que proporciona bases y fundamentos teóricos que les permitan visualizar un panorama conciso sobre el tema en cuestión.
Hafif Strüktür Malzemelerinin Çağdaş Mimaride Yapıya Katkıları
Authors: GÖKALP Damla , SOLAK Adem
Published: March 2023

Eski çağlardan başlayıp, günümüz çağdaş yapılarına kadar gelen mimari, insanoğlunun hayatının hep bir köşesinde bulunmuştur. Dolasıyla ihtiyaçlar doğrultusunda, bir örtü düzeneği sayesinde oluşturulan çadırlardan, günümüz gökdelenlerine kadar birçok evre ile yapılar hep gelişmiştir. Sanayi Devrimi’nin de etkisiyle 20. yy içerisinde teknolojinin daha da hızlanması direkt olarak yapı sektörünü de değiştirip, geliştirmiştir. Mimariye katılan yeni malzemelerin uygulanması, yapıda farklı kavramları ortaya çıkarmış ve daha tercih edilir nitelikte olmuştur. Eskiden taşıyıcı özelliğinde olan malzemeler, yapının formuyla strüktürünü ayırıp, mimar ve mühendislerin tasarım dili haline gelmiş ve daha ulaşılabilir çözümler sunmaya başlamıştır. Özellikle 20. yy içinde üretilen ve mevcut yapı stoğunda hala geliştirilmeye devam eden hafif malzemeler, strüktür sistemlerin geldiği son aşama olup, yapılardaki birçok soruna cevap vermektedir. Çelik, katkılı beton, cam sistemler, ahşap sistemler, pnömatik sistemler, membran ve tekstil sistemlerden oluşan hafif strüktür malzemeleri, yapı fonksiyonuna; sürdürülebilirlik, enerji etkinliği, geri dönüştürülebilir malzeme kullanımı, afet durumundaki davranışı, akıllı mimariye katkıları, geçirgen alanlar ve erişilebilir mekân organizasyonları tasarımı gibi birçok avantajı da beraberinde getirmektedir. Bu çalışmada, hafif strüktür malzemelerin yapıların strüktür ve formuna dahil olurken tasarıma etkileri, yapıya ve çevresine katkısı, sürdürülebilir ve geri dönüştürülebilir yapı tasarımına etkisi, deprem ve yangın anında yapıya etkileri, afet sonrası geçici yapılaşmaya katkıları incelenmiştir.
TÜRKİYE’DE İŞ İNSANLARININ ÖRGÜTLER ARASI SOSYAL AĞLARI VE AĞLARA KATILIM GEREKÇELERİ ÜZERİNE BİR ARAŞTIRMA
Authors: ÇUBUKCU Murat
Published: March 2023

Bu çalışmada örgütsel ağ düzeneklerine dair oluşan geniş yazına dayanarak, Türkiye’deki girişimci aktörlerin hangi formel ve informel ağlara sahip oldukları ve bu ağlar içinde bulunma nedenlerinin tespiti amaçlanmıştır. İş insanları arasındaki ilişkisel süreçler incelenmiş, gözlem ve anket gibi niceliksel araştırma yöntemleri benimsenmiştir. Araştırmanın evrenini, İSO Türkiye’nin ilk 500 sanayi kuruluşu 2019 yılı listesinde yer alan büyük sanayi kuruluşlarından kasti örnekleme yöntemi ile seçilen 156 büyük sanayi kuruluşu ve bu sanayi kuruluşlarının 257 iş insanı oluşturmaktadır. İş insanlarının sosyal ağ verilerinin analizi için Ucinet 6 ve bu iş insanlarının ağlara katılım nedenlerine ilişkin verilerin analizinde ise SPSS 13 yazılım programları kullanılmıştır. Araştırmanın amacı doğrultusunda yapılan analizler sonucunda Türk girişimcilerin sahip oldukları ağ ilişkileri ve ağlara katılım nedenlerinin ülke bağlamına özgü özellikler taşıyabildiği tespit edilmiştir. Türkiye bağlamında işletme organizasyonlarını temsil eden iş insanlarının katıldıkları sosyal ağların niteliğinin ve bu ağlara dahil olma amaçlarının sosyal ağ kuramının geliştirildiği ve ağırlıkla araştırıldığı Anglo Sakson kültürüne dahil ülkelerden farklı sonuçlar ürettiği tespit edilmiştir. İş insanlarının sosyal ağlara katılma gerekçelerinde gözlemlenen ve beklenen değişkenlikler, sosyal yerleşiklik kuramı çerçevesinde paralellik arz ettiği tespit edilmiştir.
BİST’te işlem gören Gayrimenkul Yatırım Ortaklıklar Şirketlerinin Gri İlişkisel Analiz Yöntemiyle Finansal Performansının Değerlendirmesi
Authors: ÇOLAK Zeynep
Published: March 2023

Şirketlerin finansal performansı, şirketin mali ve sermaye yapısı ile ilgili sorulara geniş bir boyut içinde cevap veren, analiz, ölçüm, değerlendirme ve yorum yoluyla amacına ulaşan nicel bir araştırma konusudur. Çalışmada Gri İlişkisel Analiz metodu kullanılarak Borsa İstanbul’da (BİST) işlem görmekte olan 27 adet GYO’nun Covid-19 dönemindeki 2019-2021 yıllarına ait finansal performansları; likidite göstergesi, finansal yapı göstergesi, kârlılık göstergesi ve devir hızı göstergesi kapsamında 12 adet finansal oran doğrultusunda değerlendirilmiştir. Ulaşılan bulgular, Covid-19 döneminde GYO’ların finansal performanslarının genel olarak kötü olduğunu; finansal performansı oluşturan göstergeler bakımından teker teker incelendiğinde ise finansal yapı olarak iyi durumda oldukları; karlılık, devir hızı ve likidite olarak kötü durumda oldukları tespit edilmiştir. Buna ilave olarak çalışmada GYO’lar performansları doğrultusunda sıralanmıştır.
Critical Porosity in Understanding Acoustic Porosity Anomalies. A Case Study in Complex Carbonate Reservoir in Indonesia
Authors: Wijaya A.A.
Published: March 2023

The difference between acoustic porosity to total porosity logs has been used to infer the secondary porosity. Apart from gas and/or organic matter, any acoustic porosity with higher reading than total porosity would be considered as an anomaly response. This paper discusses anomalous acoustic porosity in a complex carbonate reservoir, where the acoustic porosity shows higher values than those of the total porosity. The investigation reveals that this anomaly correlates with changes of rock type quality and can be corrected using the critical porosity concept. The critical porosity links the rock quality to change of the acoustic velocity as a function of critical porosity-bulk modulus for each rock type (Akbar, 2019). Niu et al (2009) proposed the use of shear modulus to determine the critical porosity value. By combining Niu et al (2009) with Akbar (2019) approaches, the critical porosity and critical bulk modulus can be calculated for all rock types. The result indicates that the critical porosity for each rock type is lower than the proposed value from Akbar (2019). Further analysis from the corrected acoustic porosity suggests that the secondary porosity is low, and this observation is supported by low anisotropy data from dipole sonic. The use of shear as opposed to compressional wave data is better suited in this case study, with a clearer trend in determining the critical porosity. The case study highlights the importance of the critical porosity concept in understanding anomalies in the acoustic porosity as an effect of rock quality and explaining the preferred method when determining critical porosity values in a gas-bearing complex carbonate reservoir. Further studies may be needed to investigate the critical porosity relationship for poorer rock types in complex carbonate reservoirs.
De-Risking Subsurface Uncertainties in Static Model Workflow for Ngimbang Carbonate Build-Up in Recently Discovered Field Located in North Madura II Block, Indonesia
Authors: Ibrahim A.M.B
Published: March 2023

EJ-7 field is a green field located about 65 km NE of Surabaya in the offshore Northeast Java Basin in water depth of about 25m. EJ-7 was drilled and tested oil in Ngimbang Carbonate. There was no wireline logging data acquired successfully from the reservoir as the operation encountered total losses. Although the reservoirs are generally of good quality, it remains a challenge to capture the uncertainties in the static model due to the limited information available, especially from wells and seismic data. The integration of log data, geology and geophysical (G&G) interpretation and pressure analysis are the key factors to comprehend and to reduce the uncertainties, especially in fluid contact definition, which will give significant impact to resource estimation. Detail static modeling techniques and methodologies were applied to address and mitigate the uncertainties in EJ-7 Field. Valuable information from logs, seismic, regional sedimentology study and pressure analysis were integrated into the static model. The robust workflow was designed to capture the subsurface uncertainties, adopting the latest machine learning and a prudent selection of P10, P50 and P90 scenarios. Ultimately, the probable property maps of P90, P50 and P10 were utilized for forecasting as input to the numerical flow simulation to model the dynamic behavior of the reservoir, optimize the number of well count for development, and calculate the overall project economic value. Moreover, a seamless collaborative work with a third-party study also provided more constructive work to mitigate all the uncertainties through optimizing the well locations and the development concept for EJ-7 Field.
Fault Seal Analysis Application in Carbonate Rock Sequences: Issues and Solution
Authors: Sapiie B.
Published: March 2023

Fault seal analysis (FSA) is a crucial component of hydrocarbon exploration, production, and reservoir management. However, most FSA workflow and theories are developed for normal fault systems that commonly apply to siliciclastic rock. In the case of the carbonate rock, a simple algorithm of FSA using shale gouge ratio (SGR) analysis may generate some errors in sealing and leaking faults. The FSA method is primarily controlled by shale volume distributions rather than by throw, as demonstrated by sealing faults behavior with small throws. This result suggested that good quality sand reservoir distributions become the primary control for the fault sealing capacity. There are three approaches to determining the clay volume: (1) the gamma-ray clay volume calculation, (2) dual parameter (gamma-ray and NPHI-RHOB) clay volume calculation, and (3) multimineral analysis results (probabilistic approach) clay volume calculation. However, carbonate rock sequences have low concentrations of radioactive material that give low gamma-ray readings and SGR values. Therefore, the shale volume value must be calculated using modified petrophysical approaches for better sealing capacity distributions. A detailed FSA study was carried out using integrated research of fieldwork and shallow drilling core data. This field study was in the Rajamandala Carbonate Complex in the Padalarang area. The result of the study will become the focus of this paper. The evaluation involves five core data from shallow drilling at various levels of the Cikamuning normal fault supported by field mapping, thin sections, and XRD. The tentative results suggested that fault gouge in the carbonate rock sequences is complex and varies significantly in composition, thickness, and diagenetic. Further detailed works need to be done, particularly with deep core data.
The Biggest Risks in Hydrocarbon Exploration That are Often Overlooked: Cases of Exploration Failures in Indonesia and The Solutions
Authors: Satyana A.H.
Published: March 2023

Petroleum system analysis is a method commonly used by geoscientists to assess the possibility of an area containing petroleum. But the levels of analysis of the elements and processes of a petroleum system are often unbalanced. Some aspects are analysed in detail while others are overlooked. These overlooked aspects often turn out to carry the highest risks for exploration. The author reviewed multiple cases of exploration failures in Indonesia post-2000 and found that these failures are generally related to an overlook of some elements and processes of the petroleum system. This includes the tendency to think of seismic low as a kitchen, being too optimistic in doing basin modelling, assuming that it is sufficient if kitchens have generated hydrocarbons whereas expulsion threshold is more critical, not mapping migration pathways in detail, and not evaluating carrier beds and regional sealing. Revisiting the petroleum system analysis method, carrying out a more balanced analysis for all elements and processes of the petroleum system, and reconstructing it with the tectono-sedimentary evolution of the basin where the exploration area is located from its formation to the present day (dynamic interpretation) are the solutions offered. Hopefully these solutions can reduce exploration failures and increase success in Indonesia and other areas.
The Importance of Microscopic Analysis and Identification for Carbonate Reservoir Characterization, Study Case From CD Carbonate Interval, North Madura Platform
Authors: Wijaya A. K.
Published: March 2023

The Early Oligocene of CD Carbonate interval is the major reservoir in the studied area. The reservoir quality is a product of not only the overall porosity and permeability, but also the variation of these elements. The variation is indeed a reflection of heterogeneity caused by a combination of facies deposition and diagenesis process that have modified the whole pore systems. Existing heterogeneity has also controlled the reservoir zonation and reservoir deliverability. Microscopic analyses using more than 200 thin section samples from five cored wells, which include fluorescence microscopy analysis, were conducted in order to describe the reservoir characteristics through identification of texture, grain/biota composition, degree and type of cement as well as geometry and distribution of pore types. The sequence of the cementation process was evaluated by using Cathodoluminescence (CL) analysis as shown by different CL patterns. Based on microscopic analysis and identification, the common pore types are microporosity, interparticle, vuggy, moldic, intraparticle, and fractures. These pore types have direct relationship to reservoir quality and deliverability confirmed by well test. The well that has more vuggy dominated porosity has better performance as compared to the well that consist of interparticle-moldic dominated porosity and microporosity (matrix) dominated porosity. These pore types predominantly are secondary porosity mostly attributed to subaerial exposure and dissolution associated with meteoric diagenesis, some of which were improved by late burial diagenesis. The identified pore types and their distribution become substance for reservoir performance prediction. All of the methods discussed here might be applicable elsewhere. However, the differences in tectonic setting, depositional environment, diagenetic, and burial history may result in different pore systems.
Present-Day 3D Lithospheric-Scale Thermal Characterization of Sumatra, Indonesia, and Its Correlation to The Regional Tectonic
Authors: Ruliansatri V.
Published: March 2023

We present a present-day 3D lithospheric-scale thermal model covering the Sumatra area. The structural model was built based on published geological and geophysical data which resolves major sedimentary, crustal, and lithospheric mantle packages. This process allowed us to contrast the characteristics of four hydrocarbon-prone back-arc basins namely the North Sumatra Basin (NSB), Central Sumatra Basin (CSB), South Sumatra Basin (SSB), and Sunda Basin (SB) respectively. We moreover assessed variables that influence the present-day subsurface temperature and how it relates to the area tectonic setting. The modeling process began with the creation of a 3D geological model and setting up the upper and lower boundary condition. The temperature modeling was performed by constructing a forward model that consists of multiple 1-D temperatures using Basin 3D Temperature (B3T) simulation tools, which subsequently was used to build a 3D forward model. The model was iteratively calibrated by adjusting the boundary conditions and its prior thermal properties. An ensemble smoother with multiple data assimilation (ES-MDA) method was also applied to minimize the difference between model predictions and observations. A total of 147 temperature data sets from an open access Southeast Asia research group were used to assess model accuracy. The modeled temperature distribution varies in response to the imposed heterogeneous distribution of thermal properties assigned to the different units. First-order variations in the present-day thermal structure are primarily caused by the variability in the radiogenic heat produced within the different crustal compartments, variation in the lithospheric and upper crust thickness, and the thermal blanketing effect from the sedimentary layer. This study demonstrates how first-order variations in the structurally controlled distribution of thermal properties influence the regional thermal field. Both academia and industry also can use this model as the starting point for refinement of local models of a higher spatial resolution if denser data coverage is available.
Redefining Horst and Graben Distribution in The Onshore Part of The North East Java Basin and Its New Exploration Opportunity
Authors: Purnama Y.S
Published: March 2023

The onshore part of North East Java Basin (NEJB) is a well-known hydrocarbon producing area in Indonesia, with the largest proven reservoir being the Oligo - Miocene carbonates which accumulated over basement horsts. Currently, the understanding of horst distribution is based on previous publications. However, new integration studies on surface data (e.g. outcrop, satellite image, geological map) and subsurface data (e.g. well data, biostratigraphy, seismic and gravity data) has provided a new perspective of horst and graben distribution, which has led to a new exploration concept in the onshore part of NEJB. The geological character of horst and graben has been carefully described to be used as a predictive tool to redefine where the area should be considered graben or horst. Integrating horst and graben characters with available data has enabled generate of a new horst and graben map. The study outcome suggests there are six horsts and six grabens. Some horsts are known, but many are new. Likewise, some grabens are known, but others are unique. New exploration opportunities have been generated by these horsts and grabens in the context of depositional setting from Middle Eocene to Middle Miocene. In addition, three play concepts have been created. They are Eocene Clastic, Eocene to Early Miocene Carbonates, and Early to Middle Miocene Clastic. The plays differ, since the horst and graben positions are unique compared to traditional knowledge. The message is clear, this study has opened new opportunities, as new horsts mean new opportunities to find new (giant) oil and gas fields.
Developing Production Operators Capability With Integrated Competency Development Program (“Intercom”) in PT Pertamina EP
Authors: Nuraisyiah C.
Published: March 2023

This paper discusses the integrated competency development of Operators in the Production Operations Function at Pertamina EP. There are several challenges to improve competences which require an integrated approach towards integrated competency development. Integrated Competency Development aims to become the competency standard for Production Operation Function Operators, competency assessment through coaching, training and upskilling, certification, and program monitoring through a dashboard that can be accessed via the web. The implementation of integrated competency development concept consists of 10 gradual and simultaneous. After implementation, Integrated Competency Development can improve operator competency development in the following aspects of Quality & Quantity achievement; 100% in Upskilling Quantity Accounting System, 100% in Upskilling Coach, 92% in Mandatory operator Certification, 100% in Coaching Workbook implementation, Cost Savings of 330-million-rupiah, availability of Integrated Competency Development monitoring dashboard. “Integrated Competency Development” is an effective tool to help management and company to develop better human resource quality, in a very short time and also at low cost.
Sensitivity Analysis on Oil Recovery Improvement Through Application of Fracture-Assisted Steamflood
Authors: Josefin S.
Published: March 2023

The most common recovery method for heavy oil reservoirs is steam injection, which is one of the most effective thermal recovery processes. However, the application of steam injection comes with many challenges, for instance unexpected faults, heat transfer efficiency, and less exposure between oil and steam. The effectiveness of steam injection decreases with the lower exposure of oil to steam. One way to tackle this problem is by applying hydraulic fracturing to increase the surface area of oil to steam. This fracture-assisted steam flooding process is a rising new technique in which a path is created between injection wells and production wells. In this paper, the effects of a hydraulically fractured reservoir in the steam injection process are simulated and evaluated using a commercial simulator. The focus of this research is to find the best fracture properties by sensitivity tests. The effects of the steam properties are also examined. Three scenarios are used to illustrate the steam injection method: normal reservoir model, hydraulically fractured reservoir model, and horizontal injector wells. The use of hydraulic fracture from the model results in a 20% increase of oil recovery compared to the normal reservoir model. The parameters used for sensitivity tests are fracture parameters such as fracture length and fracture width, and steam properties. The sensitivity tests indicate that parameters such as injection pressure and fracture scheduling have a big impact on increasing the oil recovery during the fracture-assisted steam flooding process. The optimum result is generated from the fracture-assisted steam flooding scenario with a sensitivity of fracture schedule and higher injection pressure. This study proves that improvements in the effectiveness of the steam injection process in heavy oil reservoirs can be achieved. It also presents a unique approach to improve steam-oil exposures by applying horizontal injector wells. This paper introduces the effect of an alternative approach to apply fracture-assisted flooding in the steam injection process. The paper also discusses the best scenario for steam injection by combining the sensitivity of steam and fracture parameters. Both combinations will affect the increase of oil recovery by 25-30% from the base case scenario.
A Strategy to Achieve 1 Mmbopd National Oil Production Target By Implementation of Artificial Intelligence Algorithm to Accelerate The Exploration Process
Authors: Kumoro M.N.P.
Published: March 2023

Based on the latest data released by the Special Task Force for Upstream Oil and Gas Business Activities (SKK Migas), the average production per day of national oil and gas in 2021 was recorded at 0.66 million BOPD (Barrels Oil Per Day), while the Indonesian government targets the production of 1 million BOPD. The challenges to meet target are mainly due to declining production, pandemic (operational issues), unplanned shutdowns and limited exploration activities. The objective of this paper is to design an algorithm to accelerate the exploration process. A workflow consisting of strategy to meet the target of 1 MMBOPD national oil production by using AI (Artificial Intelligence) is developed. Critical variables such as licensing (permit), appraisal, conceptual screening, G&G survey, POD, drilling, logistic and infrastructure are all identified then weighed to ensure uncertainties are controlled. Based on these variables input, the algorithm is developed with additional looping process and data training to ensure that the output of decision making is reliable. As conclusion, Big Data and AI strategies are capable to provide real-time insights that help to consider the next steps more accurately in every process to accelerate exploration phase. The use of AI can enhance the exploration phase and also aligns with business strategy of planning and investment and reduces any possible uncertainties.
New Attribute Energy Weighted AVO (EAVO) Application on The Acacia Bagus Structure, Jatibarang Field, North West Java Basin
Authors: Haikal A.F
Published: March 2023

A new attribute energy-weighted AVO (EAVO) is one of the derived attributes of AVO which is often used as an indicator of the presence of hydrocarbons and can be applied to pre-stack and post-stack seismic data. The main principle of this attribute is to increase the anomalous response associated with hydrocarbons while attenuating the seismic background around the anomaly. This advantage is not found in other types of attributes where almost all of the seismic attributes can only be used on one type of seismic data. This study aims to apply the EAVO attribute to pre-stack and post-stack seismic data in determining the distribution of hydrocarbons in the Acacia Bagus structure, Jatibarang Field, North West Java Basin. Pre-stack, post-stack, and Well A-01 seismic data are the data used in this study. First of all, a quick look interpretation of the well data is carried out to determine the target zone. After that, pre-conditioning gather, well seismic tie, horizon picking, and continued application of the EAVO attribute to each seismic data are carried out. Two targets are found in Cibulakan Formation (target A) and Baturaja Formation (target B), both comprised by limestone. There is a response in the form of peak amplitude on the data gather whose energy is getting weaker as the offset increases for both targets. Then for the stack data, the peak amplitude response is only found on target B. However, if one looks at the horizontal slice of the stack data, there is a high amplitude distribution in the north and south of the research zone for target A, as well as a distribution in the north of the research zone for target B.
Performance Investigation of DP-16QAM Ultra-wideband- Wavelength-Division Multiplexing Communication System: Optimum Power Consideration
Authors: Moosa Arwa , Fyath Raad Sami
Published: March 2023

Recently, there is increasing interest in using the 18 THz bandwidth offered by S+C+L band to increase the transmission capacity of fiber communication systems. This leads to the generation of ultra-wideband (UWB) wavelength-division multiplexing (WDM) optical communication systems. In these advanced systems, stimulated Raman scattering (SRS) causes a power transfer from high-frequency channels to low-frequency channels. This effect leads to an increase in the nonlinear interference (NLI) between the UWB-WDM channels. Power optimization techniques are required to balance transfer power between band channels, thus increasing the maximum transmission reach (MTR) along with increasing system capacity. In this paper, the transmission performance of S+C+L band system operating with dual-polarization 16-QAM signaling is investigated using enhanced Gaussian noise model. The transmitter and receiver for each DP channel use a -polarized laser and incorporate two identical configurations, one for x- and the other for y-state of polarization (SOP). The results are presented for two values of symbol rate, 40 and 80 GBaud, where the system carries 360 (=160+80+120) and 180 (=80+40+60) channels, respectively. The results revel that the MTR of both cases is equal to 12 100 km-spans when the channel lunch power equals to -4 and -2 dBm, respectively. This work also shows the effect of NLI components as a function of the number of spans, channel spacing, and channel launch power. The results show that the cross-phase modulation component of the NLI has high accumulated value with transmission distance, while the self-phase modulation component is almost constant.