bluuebunny/crossref_metadata_2025 huggingface dataset:
Pemodelan Klaster Frekuensi Suara Bising Mesin Pesawat Menggunakan Metode Extended Kalman Filter
Authors: Tjahjamooniarsih Neilcy , Putra Leonardus Sandy Ade
Published: December 2021

Kebisingan adalah bunyi yang tidak diinginkan dari usaha atau kegiatan dalam tingkat dan waktu tertentu yang dapat menimbulkan gangguan kesehatan manusia dan kenyamanan lingkungan. Salah satunya kebisingan pada wilayah bandara yang terpancar dari gelombang suara mesin pesawat udara dan dapat mengganggu lingkungan. Menurut World Health Organization (WHO) suara bising sekeras 85 dB hanya dapat didengar secara terus menerus maksimal selama 8 jam per-hari. Setiap peningkatan suara bising sebesar 3 dB maka suara bising bertambah dua kali lipat. Suara bising dapat menjadi salah satu penyebab gangguan pendengaran (Noise Induced Hearing Loss). Penelitian ini menyajikan perencanaan mekanisme identifikasi sistem yang mencakup perencanaan skema identifikasi, pembentukan pasangan data identifikasi, dan penurunan algoritme identifikasi. Metode Extended Kalman Filter digunakan dalam mekanisme identifikasi untuk menemukan model hubungan antara komponen dominan pembentuk suara bising dengan suara bising secara keseluruhan yang kemudian dilakukan validasi terhadap model tersebut. Pengujian terhadap model dilakukan menggunakan sinyal-sinyal hasil pengukuran yang tidak diikutsertakan selama proses identifikasi. Hasil dari penelitian ini diperoleh bahwa frekuensi noise saat pesawat tinggal landas berkisar antara 50 Hz – 7000 Hz dengan model matematis spreaded continuous frequency.
Analisis Metode Quantum untuk Optimalisasi Algoritma Best First Search
Authors: Dewi Rafiqa , Lubis Muhammad Ridwan
Published: December 2021

Pada penelitian ini, penulis mengusulkan metode quantum untuk menggantikan perhitungan klasik pada algoritma Best First Search, yang bertujuan untuk meningkatkan algoritma BFS dalam mencari solusi terbaik, dengan membuatnya bekerja lebih cepat. Penulis menggantikan setiap informasi yang disimpan dalam bit ke dalam bentuk qubit. Penulis telah melakukan percobaan terhadap 23 solusi dengan 3 qubit. Setelah menerapkan pendekatan qubit ini pada perhitungan BFS klasik maka diperoleh hasil akhir berupa perolehan solusi terbaik dengan percepatan yang signifikan. Dimana perhitungan BFS Klasik melakukan 8 kali perhitungan sementara BFS Quantum melakukannya hanya dengan 1 kali perhitungan saja.
Red Carbon: a Carbon-Oxygen-based covalent semiconductor for selective amine sensing
Authors: Giusto Paolo , Cruz Daniel , Rodriguez Yael , Rothe Regina , Tarakina Nadezda
Published: December 2021

The requirements for organic semiconductor materials and new methods for their synthesis at low temperature have risen over the last decades, especially due to concerns of sustainability. Herein, we present an innovative method for the synthesis of a so-called “red carbon” thin film, being composed of carbon and oxygen, only. This material was already described by Kappe and Ziegler at the beginning of the 20th century, but now can complement the current research on covalent organic semiconductor materials. The herein described red carbon can be homogeneous deposited on glass substrates as thin ilms which reveal a highly ordered structure. The films are highly reactive towards amines and were employed as amine vapor sensors for a scope of analogous amines. The gas-to-solid phase reaction causes a significant change of the films optical properties in all cases, blue-shifting the bandgap and the photoluminescence spectra from the red to the near UV range. The irreversible chemical reaction between the thin film and the vapor was also exploited for the preparation of nitrogen containing thin carbon films. We expect the herein presented red carbon material is of interest not only for sensing applications, but also in optoelectronics.
Electrostatic loading and photoredox-based release of molecular cargo from oligoviologen-crosslinked microparticles
Authors: Palmquist Mark , Gruschka Max , Dorsainvil Jovelt , Delawder Abigail , Saak Tiana , Danielson Mary , Barnes Jonathan
Published: December 2021

Although on-demand cargo release has been demonstrated in a wide range of microparticle platforms, many existing methods lack specific loading interactions and/or undergo permanent damage to the microparticle to release the cargo. Here, we report a novel method for electrostatically loading negatively charged molecular cargo in oligoviologen-crosslinked microparticles, wherein the cargo can be released upon activation by visible light. A water-in-oil (W/O) emulsion polymerization method was used to fabricate narrowly dispersed microparticles crosslinked by a dicationic viologen-based dimer and a poly(ethylene glycol) diacrylate. A zinc-tetraphenyl porphyrin photocatalyst was also polymerized into the microparticle and used to photochemically reduce the viologen subunits to their monoradical cations through a visible-light-mediated photoredox mechanism with triethanolamine (TEOA) as a sacrificial reductant. The microparticles were characterized by microscopy methods revealing uniform, spherical microparticles 481 ± 20.9 nm in diameter. Negatively charged molecular cargo (methyl orange, MO) was electrostatically loaded into the microparticles through counteranion metathesis. Upon irradiation with blue (450 nm) light, the photo-reduced viologen crosslinker subunits lose positive charges, resulting in release of the anionic MO cargo. Controlled release of the dye, as tracked by absorption spectroscopy, was observed over time, yielding release of up to 40% of the cargo in 2d and 60% in 5d in single dynamic dialysis experiment. However, full release of cargo was achieved upon transferring the microparticles to a fresh TEOA solution after the initial 5d period.
Growth Kinetics of Single Polymer Particles in Solution via Active-Feedback 3D Tracking
Authors: Yu Donggeng , Garcia IV Antonio , Blum Suzanne A. , Welsher Kevin D.
Published: December 2021

The ability to directly observe chemical reactions at the single-molecule and single-particle level has enabled the discovery of behaviors otherwise obscured by the ensemble averaging in bulk measurements. However powerful, a common restriction of these studies to date has been the absolute requirement to surface tether or otherwise immobilize the chemical reagent/reaction of interest. This constraint arose from a fundamental limitation of conventional microscopy techniques, which could not track molecules or particles rapidly diffusing in three dimensions, as occurs in solution. However, much chemistry occurs in the solution phase, leaving single-particle/-molecule analysis of this critical area of science beyond the scope of available technology. Here we report the first solution-phase studies and measurements of any chemical reaction at single-particle/-molecule level in freely diffusing solution. During chemical reaction, freely diffusing polymer particles (D ~ 10-12 m2/s) yielded single-particle 3D trajectories and real-time volumetric images that were analyzed to extract the growth rates of individual particles. These volumetric images show that the average growth rate is a poor representation of the true underlying variability in polymer-particle growth behavior. These data revealed statistically significant populations of faster- and slower-growing particles at different depths in the sample, showing emergent heterogeneity while particles are still in the solution phase. These results go against the prevailing premise that chemical processes freely diffusing in solution will exhibit uniform kinetics. These new understandings of mechanisms behind polymer growth variations bring about an exciting opportunity to control particle-size and plausibly molecular weight polydispersity by the rational design of conditions to dictate spatial growth gradients. We anticipate that these studies will launch a new field of solution-phase, nonensemble-averaged measurements of chemical reactions.
Perfil de nutrientes de productos alimentarios eximidos de la aplicación de advertencias en el frente del envase durante la primera etapa de la Ley de alimentación saludable en Perú: estudio de caso
Authors: Delgado Zegarra Jaime , Fabio da Silva Gomes
Published: December 2021

Objetivo.

Identificar el perfil nutricional de productos alimentarios eximidos de presentar uno o más sellos de advertencia nutricional en el frente del envase durante la primera etapa de vigencia de la Ley 30021 de Promoción de la Alimentación Saludable para Niños, Niñas y Adolescentes de Perú.

Métodos.

Se recolectaron datos de 188 productos desde puntos de venta de la ciudad de Lima. La muestra por conveniencia incluyó productos que hasta el 17 de septiembre de 2021 estaban eximidos por la legislación de presentar alguna de las advertencias para el azúcar, el sodio o las grasas saturadas. Se evaluó la proporción de productos que estarían obligados a aplicar uno o más sellos de advertencia a partir de la entrada en vigencia de la segunda etapa de la legislación. Se verificó cuántos productos eximidos de la aplicación de advertencias por la legislación contienen exceso de azúcar, sodio o grasas saturadas según los criterios de la Organización Panamericana de la Salud (OPS).

Resultados.

El 76,1% de los productos superaba al menos uno de los umbrales para el azúcar, el sodio o las grasas saturadas vigentes a partir de septiembre de 2021. La proporción de productos eximidos de presentar advertencias por la legislación y que contienen exceso de azúcar, sodio o grasas saturadas según la OPS será 4,2, 3,4 y 2,3 veces menor, respectivamente, a partir de la segunda etapa.

Conclusión.

Durante la primera etapa de vigencia de la ley, 58%, 42% y 28,2% de los productos eximidos de la presentación de advertencias contenían exceso de azúcar, grasas saturadas o sodio, respectivamente, según la OPS.
Development and modeling of non-metallic form-forming rigger for manufacture of polymer composition reflectors for satellite antennas
Authors: Dremukhin M. A. , Nagovitsin V. N.
Published: December 2021

Reducing the time for carrying out the strength analysis of a structure in the process of manufacturing shaping tooling using modern tools of virtual computer design and modeling, namely mathematical 3D modeling in a small-scale production with the use of additive technologies, is the main task. With the help of numerical discretization, the investigated model is divided into a finite set of elements, which can take any form of the element and be defined in different reference systems. This will make it possible to predict approximately numerically the behavior of the material during its deformation under the action of the given loads applied to the 3D model. The use of additive technologies with the use of modern computer modeling, which is based on software, is an urgent task. This approach will make it possible to develop equipment with a complex geometric shape, bypassing the stage of writing control programs and performing labor-intensive operations for the primary processing of the product. This method is based on the process of constructing a 3D model of the shaping tooling that repeats the shape of the reflective surface of the reflector, using modified high-temperature engineering plastics. The process of evaluating the effectiveness of the developed model is shown on the basis of strength calculations, safety factor, deformation, static stress and displacement. The results of the work can be used in the design and manufacture of dimensionally stable products of complex geometric shapes from non-metallic materials used in the aerospace industry.
Educação básica nas escolas do campo no contexto da pandemia: ensino remoto para quem?
Authors: Silva Maria do Socorro Pereira da , Cunha Adriana Lima Monteiro , Santos Thaynan Alves dos
Published: December 2021

Este estudo analisou os impactos da pandemia nas escolas básicas do campo, com implantação do ensino remoto, destacando a exclusão educacional dos camponeses no acesso às tecnologias digitais. A metodologia da pesquisa considerou a abordagem qualitativa, por meio da pesquisa Investigação-Ação Participativa. Para coleta de dados, optamos pelo levantamento da literatura, entrevistas semiestruturadas online e observação participante, mediados pelo método dialético para análises dos dados, a partir da participação dos professores das escolas do campo, egressos das licenciaturas em Educação do Campo. Os resultados apontam que os impactos da pandemia nas escolas do campo agravaram o fechamento das escolas, revelando a falta de planejamento das gestões municipais de educação para oferta do ensino remoto, visto que as escolas do meio rural não têm acesso à rede de internet, e enfatizando as condições socioeconômicas dos camponeses para acesso às tecnologias digitais e qualificação dos professores do campo, que ampliaram as desigualdades educacionais no meio rural.
УКРАЇНСЬКА НАВІГАЦІЙНА СУПУТНИКОВА СИСТЕМА: СТАН І ПЕРСПЕКТИВИ
Authors: Nesterenko S. , Yermolenko D. , Shefer О. , Kliepko A.
Published: December 2021

Проаналізовані основні діючі і перспективні навігаційні супутникові системи світу, у тому числі й регіональні, за точністю позиціонування, зоною покриття, кількістю виведених на орбіту космічних апаратів, активністю оновлення системи тощо. Відмічено, що, залежно від програмування, усі вищеназвані навігаційні системи є взаємосумісними і можуть функціонально доповнювати одне одного. Додатково підвищити точність позиціонування можливо з використанням глобальних систем диференційних поправок SBAS (Space Based Augmentation System) у Північній і Південній Америці, в Європі і Японії, а для корекції GPS–даних на території України використовуються методи коригування DGPS і RTK з наземних базових станцій. Досліджено можливості української космічної галузі. Проаналізована затверджена Концепція Державної космічної програми, яка передбачає запуск супутника «Січ-2-30» з терміном експлуатації 5 років, і подальше щорічне його доповнення кількома супутниками упродовж п’яти років. Попри позитивні зрушення в українській космічній галузі виявлені недоліки і проблеми її повноцінного розвитку: недостатнє фінансове забезпечення, нестійке правове державне регулювання, необхідність довготривалих наукових досліджень для оцінки рівня якості позиціонування. Супутник «Січ-2-30» не зможе забезпечити Україні повну інформаційну незалежність, а, отже, і фінансову незалежність від інших постачальників картографічних знімків, так як отримувані знімки будуть мати відносно невисоку роздільну здатність. Відмічено, що незважаючи на проблемні питання, є гостра необхідність розвитку власної української навігаційної системи для отримання цифрових зображень поверхні Землі. У держави з’явиться можливість проведення постійного безперервного моніторингу різних явищ, галузей, секторів, таких як землевпорядних, аграрних, екологічних, архітектурно-будівельних, економічного прогнозування, кліматичних, правоохоронних, військових тощо. Завдяки ефективній роботі української навігаційної супутникової системи з’явиться можливість брати участь у різних міжнародних програмах, зокрема з освоєння Місяця, повноцінно інтегруватися у Європейську космічну систему, що передбачає Угода про асоціацію України з ЄС
МОНІТОРИНГ ЗМІН СТАНУ СІЛЬСЬКОГОСПОДАРСЬКИХ ЗЕМЕЛЬ ЗА ДАНИМИ ФРАКТАЛЬНОГО АНАЛІЗУ КОСМІЧНИХ ЗНІМКІВ
Authors: Pashchenko R. , Mariushko M.
Published: December 2021

Відсутність загальних підходів до оцінки стану сільськогосподарських земель за даними ДЗЗ показує, що задача моніторингу змін їх стану є до кінця не вирішеною. У статті розглянута можливість використання фрактального аналізу космічних знімків супутника Sentinel-2 сільськогосподарських земель для визначення змін їх стану під впливом різних чинників. Оцінені характеристики космічних знімків супутника Sentinel-2 заданої території з сільськогосподарськими полями на них. Наведено порядок побудови поля фрактальних розмірностей та розрахунку фрактальної розмірності з використанням методів, які найчастіше застосовують на практиці для аналізу цифрових зображень – методи покриття і призми. Показано, що розрахунок і візуалізація ПФР космічних знімків сільськогосподарських земель дозволяє здійснювати їх сегментацію і виділяти межі проведених польових робіт, зміну їх у часі та оцінювати їх структуру після завершення робіт. Визначено, що під час фрактального аналізу космічних знімків супутника Sentinel-2 доцільно використовувати мінімальні або різниці фрактальних розмірностей. Показано, що для автоматизації процесу сегментації різних структур на космічному знімку можна застосовувати гістограму ПФР і селективні зображення. Запропоновано метод моніторингу змін стану сільськогосподарських земель з використанням фрактального аналізу, який дозволяє визначати межі аномалій на зображенні, початок зміни стану земель, обсяг проведених робіт та їх тривалість, а також оцінювати структуру земель
ПРОГНОЗУВАННЯ ЦІН АКЦІЙ З ВИКОРИСТАННЯМ РЕКУРЕНТНОЇ НЕЙРОННОЇ МЕРЕЖІ LSTM
Authors: Bidyuk P. , Huts Y. , Gavrilenko V. , Rudoman N.
Published: December 2021

Дослідження проведено для ознайомлення зі структурою та принципом роботи рекурентної нейронної мережі LSTM (Long short-term memory) та аналізу можливості її використання для прогнозування цін акцій однієї з великих технологічних компаній. В роботі описано теоретичний матеріал, що стосується рекурентних нейронних мереж та мережі LSTM. На прикладі статистичних даних акцій компанії Apple було продемонстровано роботу обраного методу та обчислено оцінки якості прогнозу RMSE, MAE, MAPE і оцінено точність короткострокового прогнозу. Результати дослідження показали, що рекурентні нейронні мережі можна застосовувати для прогнозування часових рядів і при цьому отримувати результат з високою точністю. У подальших дослідженнях будуть запропоновані інші види нейронних мереж та оцінка їх роботи на фінансових даних
ПІДВИЩЕННЯ ТОЧНОСТІ РОЗПІЗНАВАННЯ ОБІГОВИХ МОНЕТ ЗА РАХУНОК ВИКОРИСТАННЯ ЗГОРТКОВОЇ НЕЙРОННОЇ МЕРЕЖІ З ДЕКІЛЬКОМА ВИХОДАМИ
Authors: Vaivala Ye. , Tsyopa N.
Published: December 2021

У роботі розглянуто проблему розпізнавання зображень обігових монет за допомогою згорткових нейронних мереж. Описано традиційний підхід до вирішення задачі розпізнавання зображень, який передбачає використання звичайної згорткової нейронної мережі з одним виходом, показано та проаналізовано отримані результати. Для підвищення точності розпізнавання було застосовано архітектуру згорткової нейронної мережі з декількома виходами. Отримані результати були порівняні із результатами роботи звичайної мережі, були наведені причини відмінностей у результатах та переваги і недоліки кожного із розглянутих підходів
ВИБІР МАТЕРІАЛУ ТАРИ ДЛЯ ЗБЕРІГАННЯ МІКРОФІЛЬМІВ МЕТОДОМ АНАЛІЗУ ІЄРАРХІЙ
Authors: Piskachov Oleksandr , Piskachova Iryna , Tkachenko Vyacheslav
Published: December 2021

Зберігання мікрофільмів та їх використання мають важливе значення для заощадження інформації: найважливіших технічних, будівельних, історичних, культурних та інших даних. На стан документів негативно впливають режими зберігання, фактори, які діють за межами допустимих умов («оцтовий синдром», біологічна вразливість, «нітратний синдром» та інші), які можуть викликати прискорення їх старіння і передчасне руйнування та загрожують істотним скороченням термінів зберігання архівних документів. У статті використані результати аналізу особливостей, порядку організації заощадження мікрофільмів як архівних документів і причин повної і часткової втрати інформації на них. Результати довгострокового заощадження архівних документів залежать не тільки від режиму зберігання, а й матеріалів з яких зроблена тара. Як матеріали для тари розглядаються пластмаси, метали, картон. Для вирішення актуальної задачі визначення пріоритетності використання різних матеріалів для виготовлення тари для зберігання мікрофільмів показана можливість використання методу аналізу ієрархій. Цей метод відноситься до класу критеріальних і дозволяє більш об’єктивно проводити експертну оцінку. Для оцінки обрані такі критерії: антигрибкові властивості, механічні характеристики і пожежобезпечність, захист від оцтовог о синдрому, вага, вартість коробок.
ОБҐРУНТУВАННЯ ОСНОВНИХ ТЕХНІЧНИХ ВИМОГ ДО ЗАСОБІВ ЗНЕШКОДЖЕННЯ РАДІОКЕРОВАНИХ БОЄПРИПАСІВ
Authors: Iohov O. , Maliuk V. , Kaplun Y.
Published: December 2021

Проаналізовано можливості застосування надширокосмугових сигналів для функціонального ураження радіокерованих боєприпасів для радіоелектронного захисту особового складу підрозділів НГУ. Показано, що найбільш перспективними є системи дискретно-безперервної дії, які використовують суміщений ємнісний накопичувач енергії з використанням генераторів імпульсних напруг Аркадьєва-Маркса і узгоджену з ним антенну систему, що дозволяє випромінювати електромагнітні імпульси високої інтенсивності Оцінені енергетичні та просторові характеристики антенної системи засобу функціонального ураження радіокерованих боєприпасів
ОПТИМІЗАЦІЯ МЕРЕЖНОГО АЛГОРИТМУ ФУНКЦІОНУВАННЯ КОМП’ЮТЕРНИХ МЕРЕЖ ПІДВИЩЕНОЇ ЖИВУЧОСТІ НА МОБІЛЬНІЙ ПЛАТФОРМІ НА ЕТАПІ ЇХ ПРОЕКТУВАННЯ
Authors: Tkaдhov Vitalii , Kovalenko Andriy , Fesenko Tetiana
Published: December 2021

В статті розглянуто особливості вибору мережного алгоритму та сформульовано задачу його оптимізації при проектуванні комп’ютерної мережі на мобільній платформі шляхом розробки критерію живучості зазначеного класу комп’ютерних мереж. Метою статті є розробка критерію живучості комп’ютерної мережі на мобільній платформі для подальшого його використання при проектуванні зазначеного класу мереж з метою забезпечення належного рівня живучості мережі. Отримані результати дозволяють продовжити розвиток методики оцінки живучості комп’ютерних мереж на мобільній платформі в умовах деструктивного зовнішнього впливу за необхідності перебудови її топології; вирішувати оптимізаційні задачі мережного алгоритму функціонування комп’ютерних мереж на мобільній платформі на етапі їх синтезу. Дослідження дозволяють зробити висновки, що запропонований критерій може бути використаний на етапах проектування живучості комп’ютерних мереж на мобільній платформі, які характеризуються підвищеною живучістю та функціонують в умовах постійної перебудови схем маршрутизації даних, у тому числі за рахунок перебудови топології. Сформульовано напрями подальшої роботи, зокрема в частині проведення дослідження щодо введення в комп’ютерні мережі на мобільній платформі структурну збитковість з визначенням вузлів, які під час виконання мережею основної функції, стають уразливими, тобто захист яких необхідно підвищувати
Amyand’s Hernia: A Challenging Diagnosis
Authors:   Aldo Manuel Rodrigues Jarimba1*, Luís Ferreira A2, Teslyak O2, Ratinho J1, Marques S1, Barradas R1
Published: December 2021

Background: Hernia repair surgery is a procedure frequently performed today, both in elective or outpatient settings as in an emergency context. Hernia is defined as a condition in which part of an organ or its fascia protruded through the wall of the cavity containing it. Quite often in the emergency department incarcerated hernias are found, and in most cases, the content of the hernia sac is the omentum or small intestine. In very rare instances, the appendix can be found inside the hernia sac. When the appendix is found in the hernia sac it is called an “Amyand Hernia”, regardless if it is inflamed or not, with the incidence of appendicitis in an inguinal hernia being 0.07-0.13%. Preoperative diagnosis of an Amyand hernia is a clinical and often a Radiological challenge, being in many cases misdiagnosed as an incarcerated inguinal hernia. Usually, the diagnosis of Amyand’s hernia is an incidental finding during surgical repair of an inguinal hernia. There is still no real consensus on the ideal surgical treatment approach for this pathology. Clinical Case: A 72-year-old man, with a known reducible right inguinal hernia awaiting surgical repair presented to the Emergency Department with acute abdominal pain, nausea, vomiting and a painful right groin mass. He was diagnosed with an incarcerated right inguinal hernia and taken to the operating room for emergency surgery. An open approach was performed with a transverse right inguinal incision and the inflamed appendix was identified inside the inguinal sac. The patient was submitted to an appendectomy and subsequently, using the Bassini technique, had the incarcerated inguinal hernia corrected. Conclusion: Preoperative clinical and imaging diagnosis of amyand´s hernia is rare and difficult. More prospective studies should be carried out in order to standardize the treatment of this pathology. The diagnosis of Amyand´s hernia should be in the surgeon’s mind especially in the case of a strangulated inguinal hernia, as shown in this case.
Laparoscopic Ventral Rectopexy for the treatment for Solitary rectal ulcer- a good choice?
Authors:   Aldo Manuel Rodrigues Jarimba1*, Luís Ferreira A2, Teslyak O2, Ratinho J1, Marques S1, Barradas R1
Published: December 2021

Solitary rectal ulcer syndrome (SRUS) is an uncommon benign disease characterized by a combination of symptoms, clinical and histological findings, where men and women are affected equally, with a small predominance in women. Various treatment strategies have been advocated, ranging from conservative management to a variety of surgical procedures. Can laparoscopic ventral rectopexy be a good alternative for patients who do not respond to conservative treatment? Given the rarity of this pathology, we chose to present the case.
Investigation of contemporary instruction modes in EFL teaching: blended learning & flipped classroom
Authors: ÜSTÜNBAŞ Zafer , İPEK Ömer Faruk
Published: December 2021

Teaching English as a Foreign Language (EFL) has undergone theoretical and practical changes during decades depending on the conditions of the era. Changing circumstances have caused different approaches to emerge. With the introduction of the internet into social life and the area of education, different technological infrastructures have been created and put into practice in schools. While IT (Information Technology) once was only taught as a course at schools, even the courses themselves are now being provided through the Internet and the technological infrastructures it presents. Technological advances in recent decades have modernized EFL teaching accordingly. Technology has been benefited to assist the teaching and learning process and specially to deliver the information in different modes. As a more recent development, with widely implemented distance education after the COVID-19 pandemic broke out in the beginning of 2020, which affected the whole education system and settings, the need for emphasizing and investigating contemporary educational models and approaches for EFL classes has become a necessity. Therefore, in this conceptual study, we aimed to discuss blended learning and flipped classroom theoretically as contemporary approaches that are used in EFL classrooms. Specifically, we discussed the hegemony of technology, blended learning and flipped classroom in English language classrooms by investigating the recent studies and the literature on these concepts. The literature has revealed that these contemporary instruction modes which have increasingly been investigated are highly advantageous and useful for both teachers and students. In this conceptual study, it has been concluded that blended learning and flipped classroom are effective in increasing students’ academic performances and motivation. It has also been found that they can lead students to have positive attitudes towards learning English.
Unlocking the potential of conventional narrow azimuth data by full-waveform inversion: a deep carbonate imaging case study, offshore Indonesia
Authors: Wang J.
Published: December 2021

Full-waveform inversion (FWI) has evolved to be the contemporary solution to resolve velocity models in areas of complex structure. Further, wide azimuth, long offset and rich low-frequency seismic data, resulting from broadband seismic acquisition, helps FWI update deeper with better convergence and stability. In this study from the South Mahakam area in offshore Indonesia, multiple layers of carbonate exist from shallow to deep with sharp velocity contrast. The target reservoir is down to 3.5 kilometers. However, for the acquired data with narrow azimuths (NAZ), short offsets (3 kilometers) and low signal to noise in the low frequencies, FWI encounters challenges of cycle skipping and unstable updates in the deeper targets that are beyond the diving-wave penetration depth. Time-lag FWI (TLFWI) (Zhang et al., 2018) uses time-shift differences between observed and modeled data as the cost function, and also makes better use of the low-frequency refraction and reflection energy. TLFWI gave good velocity updates in both the shallow and deep regions and, hence, gave an improved deep carbonate image. The anisotropic model is an important factor for the success of any FWI due to the coupling between velocity and anisotropy. In this paper, joint reflection and refraction tomography (Allemand et al., 2017) were applied in order to obtain stable anisotropy models for TLFWI. Following that, TLFWI with both refraction and reflection energy gives sensible velocity updates down to 3.5 kilometers. These updates to the model improve the seismic image and, importantly, reduce the depth uncertainties in this complex geological setting. The cumulative improvements increase interpretation confidence and can reduce future drilling risks. For the seismic processing community, the reprocessing of narrow azimuth, short-offset data with TLFWI, and associated technologies, offers great potential for generating improved and more reliable images from legacy, conventional, acquisition scenarios.
De-risking Appraisal Phase in the Recent Gas Discovery in Banggai-Sula Basin, Central Sulawesi: Application of AVO Analysis and Pre-stack Inversion in the Sub-ophiolite Reef Carbonate Play
Authors: Ahmad M.
Published: December 2021

Following the success in the exploration drilling campaign in the last few years, Pertamina EP puts the recently discovered Wol Structure into the appraisal stage. The exploration wells Wol-001 and Wol-002 were spudded in 2017 and 2019 respectively, and both flowed a significant gas rate from an excellent reservoir of Miocene Reef of Minahaki Formation. A good understanding of the reservoir distribution was essential in such a stage. Therefore, a proper reservoir characterization was then carried out for further appraisal purposes. Using the improved quality data from the latest 5D interpolation-PSDM as input, integration of amplitude versus offset (AVO) techniques and rock physics analysis was conducted to investigate the hydrocarbon extent. The AVO class IIp was observed at the boundary between overlying Kintom Shale and gas saturated Minahaki limestone. It is indicated by a positive intercept (Ro), decreased amplitudes with offsets, and negative amplitudes in the far offsets. This polarity reversal characteristic is clearly seen from both AVO modeling and actual CDP in the well locations. Several CDPs inside and outside the closure were also examined to check the consistency. The slice of partial stack volumes has also exhibited a similar trend within the closure where class IIp is suggestive. Since the AVO attributes such as intercept and gradient solely were not able to visualize the reservoir extent properly, the pre-stack seismic inversion was performed to obtain a more accurate reservoir distribution through quantitative interpretation. A cross plot of P-impedance (Ip) over S-impedance (Is) differentiates the gas zone clearly from the wet linear trend. A depth slice at GWC (gas water contact) level describes that most of the Wol Structure is gas-saturated including the newly identified closure in the northwest. It is a three-way dip closure formed by limestone that was dragged upward by a thrust fault. Interestingly, it has a similar AVO response to the main Wol Structure which suggests a gas-bearing reservoir. This work brings an added value to the use of AVO analysis and pre-stack inversion for hydrocarbon mapping for appraisal purposes. Not only it has largely reduced the subsurface uncertainty, but also revealed an upside potential that is worth considering in future exploration.
Java Volcanic Arc, what lies beneath?
Authors: Septama E.
Published: December 2021

Java Island is an active volcanic arc that resides in the southwestern - southern boundary of Sundaland edges. The volcanic arc consists of several volcanism episodes, with a relatively younging trend northward (Late Oligocene to Pleistocene), following the Indo-Australian plates inward migration. In contrast to the prolific neighboring Northwest and Northeast Java Basins in the Northern edges of Java Island; the basin reconstruction and development in the East-West trending depression in median ranges of Java (from Bogor to Kendeng Troughs) are overlooked and lays bare the challenge to the seismic imaging due to the structural complexity of the overthrusted Neogene unit as well as immense Quaternary volcanic eruption covers. On the other hand, oil and gas seepages around the northern and central parts of the Island confirmed the active petroleum generation. Five focused window areas are selected for this study. A total of 1,893 Km sections, 584 rock samples, 1569 gravity, and magnetic data, and 29 geochemical samples (rocks, oil, and gas samples) were acquired during the study. Geological fieldwork was focused on the stratigraphic unit composition and the observable features of deformation products from the outcrops. Due to the scarcity of the Paleogene deposit exposure in the Central-East Java area, the rock samples were also collected from the mud volcano ejected materials in the Sangiran Dome. Both Bogor and Kendeng Troughs are active petroleum systems that generate type II /III Kerogen typical to the reduction organic material derived from transition to the shallow marine environment. The result suggests that these basins are secular from the neighboring basins, The Northwest and Northeast Java Basins, characterized by oxidized terrigenous type III Kerogen. The contrasting subsurface configuration between Bogor and Kendeng Troughs mainly concerns the fold-thrust belt basement involvement and the tectonic shortening effect on the formerly rift basin.
The Mechanical Stratigraphy of Kerendan Field in Upper Kutai Basin: Implication to Field Development with Massive Carbonate Tight Gas Reservoir
Authors: Laya K. P.
Published: December 2021

Understanding of field mechanical stratigraphy in terms of formation behavior due to coupled interaction between formation pressure depletion and state of stresses is crucial to achieving successful field development. These provide technical advantages of having a solid foundation for implementation in advanced well construction and completion strategy, especially in light of emerging and challenging plays related to unconventional reservoirs. This paper describes full-field interaction between formation behavior in 4D Geomechanical analysis of Kerendan Field located in Upper Kutai Basin, Central Kalimantan area on gas-condensate production from massive carbonate tight gas reservoir. Integrated 1D/3D/4D geomechanics study workflow result has enabled characterization of each mechanical stratigraphy unit, as follows: The overburden section is comprised of Miocene deltaic clastic succession which is characterized as “soft formation” with low stiffness (Static Young’s Modulus of 0.5 to 1.8 Mpsi) and low - medium rock strength (UCS of 800 to 2000 psi); Reservoir section comprised of Oligocene tight carbonates platform which characterized as “hard formation” with medium stiffness (Static Young’s Modulus of 3.0 to 4.5 Mpsi) and medium rock strength (UCS of 5000 to 6900 psi); Underburden section comprised of Eocene mixed-carbonate clastic succession and Pre-Tertiary metasediments which characterized as “very hard formation” with high stiffness (Static Young’s Modulus of 4.5 to 5.0 Mpsi) and medium rock strength (UCS of 6500 to 7900 psi). The Kerendan field would require implementation of special drilling and stimulation techniques in order to achieve optimum full field development potential owing to its reservoir characteristics. The field’s exhibit a large areal extent and massive tight limestone reservoir with relatively high Young’s Modulus, which is favorable for the utilization of extended reach drill (ERD) / horizontal wells followed with multi-stage acid fracturing stimulation. 3D/4D Geomechanical analysis is essential to assess the drillability and engineering limits of various development scenarios which will be strongly controlled by geomechanical fabric, pre-existing deformation/local discontinuities, prevailing principal stress tensor and stress changes during field production.
Biogenic and Thermogenic Gas Potential of The Underexplored Southern Kutai Basin, Offshore East Kalimantan: A Case Study from South Sesulu Block
Authors: Artha Y.
Published: December 2021

The Southern Kutai Basin is currently less explored than the Mahakam area and others in the northern part of this Basin. Therefore, this research focuses on knowing the potential of active source rocks that can produce hydrocarbons, the volume that can be produced and its migration that can encourage exploration activities in this area. The method of this research is to conduct a geochemical evaluation as a screening of source rock which has the potential to generate biogenic and thermogenic hydrocarbons. Rock - Eval Pyrolysis, biomarker analysis in the form of Gas Chromatography - Mass Spectrometry (GC-MS) evaluated from eight exploration wells was used to determine the quantity, quality, maturity and environment of organic material deposition. 1D and 3D basin modelling using geochemical and geological evaluations to determine the presence of thermogenic hydrocarbon shows accumulations around the study area through migration analysis. Isotope analysis, thermal gradient and sedimentation rates are used to determine the environment and activity of anaerobic micro-organisms in generating biogenic gases. Geophysical analysis including interpretation and mapping of subsurface structures using 2D and 3D seismic are used to determine the distribution of potential source rock and its migration history. Geochemical data indicate that biogenic gas have been generated from within the Late Miocene tol recent sedimentary section where the quantity of organic matter is fair to excellent (0.51 – 7.31 %wt TOC) which represents the results of micro-organism activities where sedimentation rates avg 6,2 x 107 ton/year. Thermogenic gas; however, is estimated from the Late Oligocene to Early Miocene series of post rift sediment throughout the Kutai Basin.
Hybrid Method: Surface Geochemical and CWT Gamp for Reducing the Risk of Exploration in the Sanga Sanga Area, Kutai Basin, East Kalimantan, Indonesia
Authors: Putranto A. M.
Published: December 2021

Sanga Sanga Block is a mature field that has been producing more than 50 years. In 2018, the operatorship has been awarded to PT. PERTAMINA together with 4 exploration wells as firm commitment for the next three years. Geologically, the proven fields in the Sanga Sanga area is a combination of both structural and stratigraphic traps. The study area was deposited in a deltaic environment which is prolific for its petroleum system elements such as reservoir, seal, and source rocks. The exploration objectives are clearly to prove the resources portfolio into reserve and sustain hydrocarbon production in the Sanga Sanga block. Hybrid methods, both Surface Geochemical and CWT Gamp, are constructed to identify and predict the presence of hydrocarbon accumulation. Surface Geochemical uses a direct (Acid Extracting Soil Gas & Fluoresence Analysis) and an indirect (Microbial Technique) method. The combination of both direct and indirect methods shows that signs of anomaly occurred in areas that are geologically potential for exploration by using a minimum threshold value based on analogues from dry exploration wells. The correlation of low anomaly with dry wells is nearly 90%. CWT Gamp is a transformation method of seismic attribute frequency by comparing low frequency anomalies as Direct Hydrocarbon Indicators in seismic data. This method has been applied to 3D and 2D seismic lines and resulted a good (60% – 70%) hydrocarbon correlation (DHI) at frequencies between 12-25 Hz. Combination of those methods provides a positive sign for the position of exploration wells in Sanga Sanga area and clearly boosts the confidence of the placement of exploration well, especially in delta prone areas which are very high in structural and stratigraphic trap systems.
High Resolution Correlation of Sequence Stratigraphy to Stipulate Further Hidrocarbon Prospect in A Mature Field : Case Study of Limau Field, South Sumatera Basin
Authors: Suseno P.
Published: December 2021

The Limau Trend Structure is located in the South Sumatera Basin of Indonesia. The main reservoir in this field is the Talang Akar Formation which is deposited in a fluvial complex that changes gradually into a shallow marine depositional environment in a transgressive phase of 3rd order sequence. The sediment deposit was developed from the Late Oligocene to Middle Miocene. A high-resolution sequence stratigraphic interpretation of the 3rd to 4th order was interpreted from the subsurface data (core and well log) combined with the outcrop observation that resulted in a comprehensive input for building a geological model. Based on this framework, the transgressive phase series in each parasequence set produces restricted sediment deposits that have the potential for stratigraphic traps. On the other hand, the amalgamated sands of the regression phase will be related to the structural traps. The RMS amplitude volume from seismic multi attributes analysis shows that the facies is changing with the reservoir distribution. The seismic attributes such as VpVs indicate a hydrocarbon presence. The combination of all data reveals that the stratigraphic traps are the main trapping mechanism in the Limau field. The field development works are now focusing in the northern area, on the transgressive phase of the 4th order parasequence set. It composes of a fluvial complex cycle that has a high potential for a virgin geometrically restricted (lense shaped) reservoir rather than well-connected and sand-rich maximum regressive reservoir facies. This transgressive phase reservoir of parasequence set (4th order) at the Northern Belimbing Field was proven by 2 (two) recently drilled wells. Both wells showed very good hydrocarbon indications and produced oil with an initial rate of 174 bopd & 1265 bopd respectively. These results confirmed the oil prospectivity within the transgressive phase of the 4th order parasequence set at the Northern Limau Trend. The initial resources estimation in the Northern Belimbing Field contains 65 MMBO. This is very promising for the development of the Belimbing Field, Limau Trend.
Why and How Should We Teach Asian American History?
Authors: Radhakrishnan Ritu , An Sohyun , Lee Erika
Published: December 2021

This synopsis of an interview conducted on March 12, 2021 reflects an interview conducted by Sohyun An and Ritu Radhakrishnan with Dr. Erika Lee, Regents Professor of History and Asian American Studies at the University of Minnesota. This interview took place during a time of extreme violence perpetrated against the Asian American Pacific Islander (AAPI) community. Our conversation was subdued and anxious. However, we recognized the importance of Dr. Lee's scholarship and knowledge in framing this special issue. Our focus during this interview was to provide a context for how Asian Americans are experiencing current events and how these events have been informed by history. As a result, Dr. Lee offers a perspective on why and how we should teach Asian American history.
The Prison Camp as Pedagogy of Place
Authors: Goulding Cathlin
Published: December 2021

Place-based education usually refers to curricular work conducted in PK-12 settings that mobilizes local contexts to teach subject matter content. The education research reviewed here departs from this approach. Less interested in place as a means to transmit content, instead this article describes the often intangible learning that occurs in place. Place is a repository of lived experience, one in which the mind and body are intertwined. Place-based learning involves the knowledge and affective attachments provisioned by architectural arrangements and designs. Grounded in familial experience as Japanese Americans incarcerated in World War II-era prison camps, I research historic concentration camps, prisons, and other confinement spaces and how these sites educate contemporary audiences. Many of these historic prisons are places in which populations deemed security threats to the state were targeted, stripped of certain rights and obligations, forcibly removed, and sequestered. Treating these place-based projects as a kind of “curriculum,” my research also has implications for teaching and learning in K-12 classrooms.
Inovasi Biopestisida Melalui Program Pengembangan Usaha Produk Intelektual Kampus Di UPT Agroteknopark Universitas Jember
Authors: Hari Purnomo  , Nanang Tri Haryadir  , Usmadi  , Hadi Paramur
Published: December 2021

Pengelolaan budidaya pertanian telah bergeser dari pengelolaan budidaya konvensional menuju pengelolaan yang menerapkan praktek budidaya yang baik (good agriculture practices). Salah satu upaya mengatasi kendala pengelolaan organisme pengganggu tanaman dalam praktek pengelolaan pertanian yang baik adalah meminimalisasikan aplikasi penggunaan pestisida kimia anorganik yang tidak berdampak pada kesehatan lingkungan akan tetapi juga berdampak pada kesehatan petani pengguna. Biopestisida adalah salah satu alternatif yang ramah lingkungan merupakan pestisida berbahan aktif mikroba pathogen serangga seperti Beauverisa bassiana dan Metarhizium anisopliae. Pengembangan riset jamur pathogen serangga yang ada di laboratorium Agroekoteknologi Fakultas Pertanian Universitas Jember memasuki tahapan scale up hilirisasi setelah mempunyai prototipe biopestisida berbahan aktif jamur pathogen serangga dengan formulasi tepung murni miselia jamur yang sedang dalam proses izin merk dan draft paten. Kegiatan dalam program ini bertujuan: 1) Untuk mengembangkan unit produksi biopestisida (mulai produksi sampai pengemasan) dengan pemasaran terbatas pada petani pada desa binaan LP2M tapi tetap profitabel, 2) Bertujuan untuk membangun jejaring pemasaran produk biopestisida pada stake holder yang lebih luas dalam wilayah Besuki Raya, dan 3) Memantapkan kelembagaan unit produksi biopestisida menjadi industri lebih besar.
O cristianismo como estilo numa sociedade em rede
Authors: Rodrigues Luís Miguel Figueiredo , Paula Flavio José de
Published: December 2021

Neste artigo, pretendemos articular a compreensão do cristianismo como estilo, de Theobald (2008), com aspectos da chamada sociedade em rede (Castells, 2007b). A metodologia consiste em explorar o conceito e as características da sociedade em rede, destacando, além do aspecto social, o cultural e o econômico. Na sociedade em rede, as relações sociais estão pautadas nos “nós” de uma rede que se articula como uma estrutura aberta; a cultura, chamada de virtualidade real, é caracterizada a partir da anulação do espaço e do tempo; e a economia, denominada informacionalismo, constitui-se como uma forma de capitalismo extremamente eficiente. Nesse contexto, o poder das identidades revela-se como uma possibilidade de resistência. O cristianismo, entendido como um estilo (Theobald, 2008), aponta para elementos-chave necessários para o diálogo com essa sociedade em rede, uma vez que revela uma maneira de habitar o mundo, caracterizada pela “hospitalidade do nazareno”.
Statio orbis
Authors: Taborda Francisco
Published: December 2021

Em preparação aos próximos Congressos Eucarísticos (o 52º CE Internacional, em Budapest, Hungria; o 18º CE Nacional, no Recife, PE), este artigo pergunta pelo sentido de eventos desse gênero, o que levou a criá-los e mantê-los, a evolução sofrida nesse mais de século desde que surgiram. Com essa finalidade o artigo percorre em largos traços a história dos Congressos Eucarísticos Internacionais, tentando identificar os ideais que os motivaram e moldaram, tanto do ponto de vista sociopolítico (relação entre Igreja e sociedade), como, especialmente, da perspectiva teológico-litúrgica a eles subjacente.