bluuebunny/crossref_metadata_2025 huggingface dataset:
State of the art in wind speed in England using BATS ,TBATS , Holt’s Linear and ARIMA model
Authors: Abotaleb Mostafa , Makarovskikh Tatiana , Yonar Aynur , Badr Amr , Mishra Pradeep , Williams A.J. , Yonar Harun
Published: January 2022

Wind energy is one of the most important renewable energy sources in the world. Hence, the prediction of wind speed is a highly significant subject with respect to both protecting the environment and economic development. England is among the countries with an increasing interest in the potential for wind energy systems. In this study, various time series models, including BATS, TBATS, Holt’s Linear Trend, and ARIMA models were applied for wind speed prediction in England, and their performance was compared. The available wind speed data between 1994-07-07 and 2015-12-31 were divided into two parts: training data that is used to build up the models and testing data that is used to measure the validity of a model forecast. The results of the testing data indicate that the BATS and ARIMA outperform the other time series models according to the root mean square errors.
Peningkatan Gizi Masyarakat melalui Pemberian Nuget Formula Ikan Layang dengan Penambahan Daun Kelor terhadap Kadar Seng Ibu Hamil Kurang Energi Kronik
Authors: Ahmad Ahmad , Hariani Hariani , Wiralis Wiralis
Published: January 2022

Penelitian bertujuan untuk mengetahui pengaruh pemberian formula nugget ikan layang dengan penambahan tepung daun kelor terhadap kadar seng ibu hamil kurang energy kronik di Kecamatan Puuwatu Kota Kendari, Hasil penelitian, telah diperoleh bahwa formula nugget untuk ibu hamil KEK dengan konsentrasi 700 gr ikan layang, 50 gr tepung terigu, 40 gr telur ayam bagian putih, gula pasir 5 gr, bawang putih 10 siung, garam halus 1 sendok the, lada bubuk 1 bungkus, minyak goreng 50 gr dan penambahan tepung daun kelor 45 gr, dari formula nugget tersebut diperoleh nilai gizi energi 1197 kkcal, protein 178,2 gr, lemak 19,0 gr, hidrat arang 77,5 gr dan zink 5,4 mg. Sedangkan hasil uji Proksimat diperoleh kadar air 20,613 %, kadar abu 0,642 %, protein 8,081%, lemak 18,822 %, serat kasar 3,5 % dan Zink 9,390 %. Hasil uji laboratorium untuk kadar seng pada ibu hamil KEK rata-rata 200,50 mg/L naik menjadi rata-rata 212,63554 mg/L. Hal ini  menunjukkan bahwa ada kenaikan kadar seng pada ibu hamil KEK yaitu rata-rata 12,6 mg/L, hasil uji statistik menunjukkan  terdapat pengaruh yang signifikan dengan nilai sign 0,034(<0,05), dan terjadi kenaikan berat badan rata-rata 6,86 kg dan LILA rata-rata 0,61 cm.
Kết quả tự đánh giá của sinh viên về mức độ đáp ứng năng lực theo chuẩn đầu ra chương trình đào tạo Cử nhân Điều dưỡng Trường Đại học Y khoa Phạm Ngọc Thạch năm 2020
Authors: Phan Thị Mỹ Trinh , Lê Văn Tỉnh , Đặng Trần Ngọc Thanh , Đỗ Thị Hà , Lâm Thị Thu Tâm , Hồ Thị Trúc Phương , Bùi Thị Ngợi , Lê Thị Mỹ Ly
Published: January 2022

Mục tiêu: Xác định mức độ đáp ứng năng lực theo chuẩn đầu ra của chương trình đào tạo Cử nhân Điều dưỡng trường Đại học Y khoa Phạm Ngọc Thạch thông qua tự đánh giá của sinh viên, năm 2020.
Đối tượng và phương pháp nghiên cứu: Mô tả cắt ngang trên 93 sinh viên lớp Cử nhân Điều dưỡng đa khoa chính quy niên khóa 2016-2020 đã hoàn tất chương trình đào tạo.
Kết quả: Có 55.9% sinh viên tự đánh giá năng lực bản thân đáp ứng mức độ trung bình và 44.1% sinh viên tự đánh giá đáp ứng mức độ cao đối với năng lực “Thực hành chăm sóc bệnh nhân đảm bảo an toàn dựa trên bằng chứng”. Đối với năng lực “Quản lý, cải tiến chất lượng chăm sóc, nghiên cứu khoa học và phát triển nghề nghiệp” có 38.7% sinh viên tự đánh giá đạt mức độ đáp ứng trung bình và 61,3% đạt mức độ đáp ứng cao. Tỷ lệ sinh viên tự đánh giá về năng lực “Tuân thủ các quy định của pháp luật và chuẩn đạo đức nghề nghiệp trong quá trình thực hành lâm sàng” đạt mức độ đáp ứng trung bình (15.1%) và đáp ứng cao (83.9%).
Kết luận: Hầu hết các sinh viên tự đánh giá năng lực bản thân đáp ứng chuẩn đầu ra chương trình đào tạo ở mức độ trung bình và mức độ cao. Tuy nhiên vẫn còn một số năng lực về thực hành sơ cứu - cấp cứu, liên quan đến phản ứng thuốc - tương tác thuốc và tham gia nghiên cứu khoa học cần được rèn luyện thêm.
Kiến thức và thực hành tự chăm sóc của người bệnh suy tim mạn tại Bệnh viện Đa khoa tỉnh Quảng Ninh năm 2021
Authors: Đào Thị Phương , Trần An Dương
Published: January 2022

Mục tiêu: Mô tả thực trạng kiến thức và thực hành tự chăm sóc của người bệnh suy tim mạn điều trị tại khoa Nội tim mạch - Bệnh viện Đa khoa tỉnh Quảng Ninh, năm 2021.
Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang được thực hiện trên 120 người bệnh được chẩn đoán suy tim mạn điều trị nội trú tại khoa Nội Tim mạch - Bệnh viện Đa khoa tỉnh Quảng Ninh.
Kết quả: Kiến thức tự chăm sóc của người bệnh suy tim mạn tham gia nghiên cứu thấp với điểm trung bình kiến thức là 11,1 ± 2,1 điểm trên tổng điểm 22, điểm thấp nhất là 6 điểm, cao nhất là 16 điểm, trong đó: tỷ lệ người bệnh có kiến thức ở mức khá là 40,0%; tỷ lệ người bệnh có kiến thức ở mức trung bình là 60,0%; không có người bệnh nào có kiến thức ở mức tốt và kém. Thực hành tự chăm sóc của người bệnh suy tim mạn được tính trên tổng điểm 100 cho mỗi nội dung: Thực hành về duy trì chăm sóc chỉ đạt 51,1 ± 19,5 điểm và chỉ có 19,2% người bệnh đạt duy trì chăm sóc; thực hành về quản lý chăm sóc chỉ đạt 49,4 ± 19,8 điểm và chỉ có 22,5% người bệnh đạt quản lý chăm sóc; thực hành về sự tự tin đạt 50,5 ± 16,1 điểm và chỉ có 17,5% người bệnh đạt tự tin trong tự chăm sóc.
Kết luận: Người bệnh suy tim mạn đã có kiến thức và thực hànhtự chăm sóc suy tim mạn nhưng chưa cao. Kết quả nghiên cứu cho thấy sự cần thiết phải có biện pháp nâng cao kiến thức và thực hành tự chăm sóc cho người bệnh suy tim mạn.
Các yếu tố ảnh hưởng đến quyết định của sinh viên trong việc chọn Trường Đại học Điều dưỡng Nam Định năm 2020
Authors: Vũ Thị Bích Hảo , Nguyễn Thị Bích Ngọc , Nguyễn Thị Giang
Published: January 2022

Mục tiêu: Xác định các yếu tố chính ảnh hưởng đến quyết định lựa chọn học tập tại Trường Đại học Điều dưỡng Nam Định và mức độ ảnh hưởng của các yếu tố này đến quyết định chọn trường của sinh viên trúng tuyển năm học 2020-2021.
Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang, được thực hiện với cỡ mẫu 350 sinh viên năm thứ nhất Trường Đại học Điều dưỡng Nam Định đáp ứng tiêu chuẩn phỏng vấn bằng bộ câu hỏi chuẩn bị trước.
Kết quả: 3 yếu tố cơ bản có ảnh hưởng đến quyết định chọn trường của sinh viên gồm: “Cơ hội tương lai và sở thích cá nhân”, “Đặc điểm trường đại học và điều kiện bản thân “và “Truyền thông”. Mức độ ảnh hưởng của 3 yếu tố này khác nhau với các hệ số beta chuẩn hóa lần lượt là 0,477; 0,224; 0,180. Không có sự khác biệt về quyết định chọn trường theo các đặc điểm nhân khẩu - xã hội học của sinh viên.
Kết luận: Các yếu tố ảnh hưởng đến quyết định chọn Trường Đại học Điều dưỡng Nam Định có mức độ ảnh hưởng khác nhau, theo thứ tự từ mạnh tới yếu là “Cơ hội tương lai và sở thích cá nhân”, “Đặc điểm trường đại học và điều kiện bản thân và “Truyền thông”. Do vậy, Trường Đại học Điều dưỡng Nam Định cần nâng cao chất lượng của các yếu tố này để tăng cường hiệu quả của công tác tư vấn tuyển sinh.
Stress và các yếu tố liên quan ở phụ nữ mang thai tại Khoa phụ sản, Trung tâm y tế quận Hải Châu, Đà Nẵng
Authors: Nguyễn Diệu Hằng , Trần Huỳnh Như
Published: January 2022

Mục tiêu: Khảo sát tình trạng stress và xác định các yếu tố liên quan đến stresscủa phụ nữ mang thai tại Khoa Phụ sản, Trung tâm y tế quận Hải Châu Đà Nẵng.
Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang được tiến hành trên 82 thai phụ đến khám tại trung tâm y tế quận Hải Châu Đà Nẵng từ 3/2021 đến 5/2021. Nghiên cứu sử dụng bộ công cụ Thang điểm đánh giá Stress ở phụ nữ có thai (0.89) để khảo sát tình trạng stress của đối tượng nghiên cứu, điểm trung bình càng cao thể hiện tình trạng stress càng nghiêm trọng.
Kết quả: Tình trạng stress của thai phụ được đánh giá ở mức độ trung bình với điểm trung bình về tình trạng stress là 1,22 (SD = 0,55). Trong đó vấn đề liên quan đến sức khỏe và sự an toàn của trẻ và mẹ là vấn đề gây nên stress ở phụ nữ mang thai nhiều nhất (X= 1,85, SD = 0,72). Điều kiện sinh hoạt gia đình và số lần mang thai hiện tại có mối liên quan đến tình trạng stress của thai phụ (p < 0,01).
Kết luận: Với mức độ stress trung bình ở thai phụ được đánh giá là trung bình phần nào cho thấy sự cần thiết của việc giảm mức độ stress và cải thiện sức khỏe tinh thần cho thai phụ. Cần chú trọng hơn vào việc cung cấp kiến thức, tư vấn về vấn đề an toàn trong quá trình mang thaivà sinh đẻđặc biệt ở những đối tượng phụ nữ mang thai lần đầu.
Thay đổi kiến thức chăm sóc trẻ dưới 2 tuổi mắc bệnh tiêu chảy cấp của bà mẹ tại Bệnh viện Nhi Nam Định sau giáo dục sức khỏe
Authors: Mai Lệ Quyên , Vũ Văn Thành
Published: January 2022

Mục tiêu: Đánh giá sự thay đổi kiến thức chăm sóc trẻ dưới 2 tuổi mắc bệnh tiêu chảy cấp của bà mẹ tại Bệnh viện Nhi Nam Định sau giáo dục sức khỏe.

Đối tượng và phương pháp nghiên cứu: Nghiên cứu can thiệp giáo dục sức khoẻ có so sánh trước sau tiến hành trên 110 bà mẹ có con dưới 2 tuổi mắc tiêu chảy cấp tại bệnh viện Nhi tỉnh Nam Định. Đối tượng nghiên cứu đáp ứng tiêu chuẩn chọn mẫu được phỏng vấn 2 lần bằng bộ công cụ chuẩn bị trước. Trong đó, phỏng vấn trực tiếp bà mẹ lần 1 khi trẻ vào viện ổn định trong khoảng thời gian 24 giờ. Phân tích tìm ra kiến thức còn thiếu và yếu của bà mẹ, tiến hành can thiệp giáo dục sức khỏe và đánh giá lại kiến thức chăm sóc trẻ tiêu chảy cấp của bà mẹ sau can thiệp 1 tuần.

Kết quả: Thực trạng kiến thức chăm sóc trẻ dưới 2 tuổi mắc bệnh tiêu chảy cấp của bà mẹ tại bệnh viện Nhi tỉnh Nam Định chưa tốt. Cụ thể: Trước can thiệp, bà mẹ có kiến thức tốt chiếm tỷ lệ rất thấp 4,5%; bà mẹ có kiến thức khá 8,2%; kiến thức trung bình 21,8%, kiến thức kém 65,5%. Sau can thiệp giáo dục sức khỏe, kiến thức chăm sóc của bà mẹ có con dưới 2 tuổi mắc tiêu chảy cấp điều trị tại bệnh viện Nhi tỉnh Nam Định năm 2021 được cải thiện đáng kể. Sau can thiệp 1 tuần: Bà mẹ có kiến thức tốt là 80,9%, kiến thức khá là 17,3%, kiến thức trung bình là 1,8% và không có kiến thức kém.

Kết luận: Kiến thức chăm sóc trẻ dưới 2 tuổi mắc bệnh tiêu chảy cấp của bà mẹ tại bệnh viện Nhi tỉnh Nam Định được cải thiện đáng kể sau can thiệp 1 tuần. Cần tiếp tục nhân rộng mô hình giáo dục sức khỏe cho bà mẹ có con mắc tiêu chảy cấp ở các bệnh viện khác trong tỉnh Nam Định.
Prevalence of Psychological Problems among Healthcare Workers in a Tertiary Care Hospital, Chennai, Tamil Nadu
Authors: V Nithya , Patel Rashmi Gour , NB Swetha
Published: January 2022

Background: There is growing evidence that patient care is affected by increasing psychological problems among healthcare workers all around the world. This study was conducted to estimate the prevalence of psychological problems among health care workers in Chennai, Tamil Nadu.

Methodology: A cross-sectional study conducted over a period of 6 months. A structured questionnaire that included the Patient Health Questionnaire-9 (PHQ-9) and Cohen’s Perceived stress scale were used. Analysis was done using SPSS 21.0 software. Frequency was expressed in percentage and association with factors was tested for significance using Chi square test. p Value <0.05 was considered statistically significant.

Results: Among the participants, nurses had the highest scores for psychological problems, followed by doctors and other staffs. According to PHQ-9, 32.4% of participants were found to have depression and 9% of participants had suicidal intentions, 20.3% reported high stress levels and about 70.02% reported moderate stress levels.

Conclusion: Compared to senior and experienced faculty, the junior and young faculty had higher proportions of stress, depression. It was found that lower recreational activities, experiencing abuse either verbal or physical from patients/caregivers/senior staff, lack of empathy among co-workers showed higher association with psychological problems among the health care workers.
Does re-amputation following lower extremity amputation in diabetic or dysvascular patients negatively affect survival?
Authors: BAYSAL Ozgur , MSANGI Waziri Juma , GÜNAR Berkin , EROL Bulent
Published: January 2022

Objective: We aimed to investigate the characteristics of patients who underwent unilateral amputation due to diabetes and peripheral artery disease, as well as the risk factors that cause re-amputation, and to determine these patients' survival status and the risk factors for mortality.
Patients and Methods: This retrospective study included 133 patients who underwent amputation due to diabetes and peripheral arterial disease between 2012 and 2018. The etiology of amputation, the re-operation rate and time to re-operation following initial amputation, survival status and follow up results were accessed from hospital records.
Results: Twenty-eight patients underwent amputation due to peripheral arterial disease, whereas 105 patients had peripheral vasculopathy due to diabetes mellitus. The re-operation rate was 33.8%, and the median period from initial surgery to the second surgery was six-weeks. Sixty-six deceased patients survived with a median of 6 months following initial operation.
Conclusion: The most crucial factor causing re-amputation was the non-healing wound problems. Patients with amputation should be followed up carefully for wound problems in the six weeks after surgery. Advanced age, American Society of Anesthesiologist grade 4 patients, associating neurological disease, low albumin level, low lymphocyte count and postoperative intensive care unit requirement were all poor prognostic factors for survival. Re-amputation had no negative effect on survival.
Modeling and analysis of fractional TB model with Atangana-Baleanu derivative
Authors:   Abdul Wali Khan University Mardan, Ali Aatif , Islam Saeed ,   Abdul Wali Khan University Mardan, Iqbal Quaid , Gul Huma , Nafees Muhammad
Published: January 2022

In recent years Atangana and Baleanu proposed a new fractional derivative with non-singular and non-local kernel, this paper formulate a fragmentary request numerical TB model with AtanganaBaleanu derivative (AB derivative). We figured the basic reproduction number ( R0 ) and assessment of boundary dependent on genuine information of Khyber Pakhtunkhwa Pakistan, Initially we present the fundamental properties of the model, the existence and uniqueness of the model is proved using fixed point theory. At last, the model is tackled mathematically through Adams-Bashforth Moulton technique. The mathematical results for the extended model of the elements of Tuberculosis is shown graphically to feature the actual conduct of the issue and the underlying conditions are presented. The graphical results clarify the impact of various boundaries. From the examination it is tracked down that fragmentary request gives more understanding with regards to the infection elements.
Approximate Solution of Generalized Modified b-Equation by Optimal Auxiliary Function Method
Authors:   Abdul Wali Khan University Mardan, Ali Aatif , Zada Laiq ,   Abdul Wali Khan University Mardan, Nawaz Rashid ,   Abdul Wali Khan University Mardan
Published: January 2022

In this study, the implantation of a new semi-analytical method called the optimal auxiliary function method (OAFM) has been extended to partial differential equations. The adopted method was tested upon for approximate solution of generalized modified b-equation. The first-order numerical solution obtained by OAFM has been compared with the variational homotopy perturbation method (VHPM). The method possesses the auxiliary function and control parameters which can be easily handled during simulation of the nonlinear problem. From the numerical and graphical results, we concluded the method is very effective and easy to implement for the nonlinear PDEs.
Analysis of Non-Isothermal MHD Thin Film Flow from Moving Belt with Slip and Variable viscosity
Authors: Haq Shamsul
Published: January 2022

This paper aims the study of electrically conducting Newtonian fluid flow and heat transfer considering the slip at the moving belt with temperature dependent viscosity. A domain decomposition method (ADM) is employed to solve the non-linear system of equations. Explicit expressions are obtained for velocity profile and temperature distribution. Effect of variable viscosity parameter, slip, Hartmann number, Brinkmann number and Stoke number are discussed and graphically shown.
Bernstein and Bernstein-Like Inequalities for Modulation Spaces
Authors:   The Hashemite University, Al-Sa'di Sa'ud , Samarah Salti
Published: January 2022

It is shown that the modulation spaces Mwp can be characterized by the approximation behavior of their elements using Local Fourier bases. In analogy to the Local Fourier bases, we show that the modulation spaces can also be characterized by the approximation behavior of their elements using Gabor frames. We derive direct and inverse approximation theorems that describe the best approximation by linear combinations of N terms of a given function using its modulates and translates.
A EVOLUCIÓN HISTÓRICA DA TÁBOA PERIÓDICA
Authors: García Concepción
Published: January 2022

A aparición de elementos químicos ao longo da Historia ten que ver, por unha banda, coa propia natureza química dos elementos, e por outra, coa evolución do coñecemento científico. A organización dos elementos estará asociada a Historia da Química, a Historia da Ciencia e a Historia da Humanidade. Se nos remontamos a antigüidade, apenas unha ducia de elementos eran coñecidos e empregados polos nosos antepasados. Empédocles (450 a.C.) propuxo que toda a materia terreal está formada por catro elementos (terra, aire, lume e auga), Aristóteles (350 a.C.), engadiu un quinto elemento, o éter que forma os corpos celestiais, esféricos e perfectos. Estas ideas perduraron case 2000 anos, durante séculos escuros, aínda que os alquimistas continuaron a indagar en primitivos laboratorios. Sería Galileo (1564-1642), activador da revolución científica no Renacemento, o que observando a lúa co seu telescopio atopou probas de que Aristóteles estaba errado, xa que a perfección circular non era o que el percibía. A táboa de afinidades de Geoffroy, na que agrupaba por columnas as sustancias pola súa tendencia á combinación, tendía unha ponte entre a alquimia e a química.
A IUPAC NA AXUDA DA CONFECCIÓN DO SISTEMA PERIÓDICO
Authors:   Universidade de Santiago de Compostela, Bermejo Manuel R. , Maneiro Marcelino , Rodríguez-Silva Laura , Fernández-García M. Isabel
Published: January 2022

O ano 2019 foi nomeado pola ONU “Ano Internacional do Sistema Periódico” para celebrar numerosas efemérides no mundo da Química. Entre outros acontecementos celébranse: os 230 anos da publicación do famoso libro de Lavoisier o “ Tratado Elemental de Química”, onde aparece por vez primeira unha táboa onde están recollidos os elementos químicos coñecidos na época; os 150 anos da publicación da famosa “Táboa Periódica” por Dimitri Mendeleev e os 100 anos da creación da IUPAC (acrónimo en inglés da chamada Unión Internacional da Química Pura e Aplicada), entre outros acontecementos. Neste capítulo trataremos de establecer e explicar a relación existente entre a IUPAC e o Sistema Periódico ao longo da historia da Química. Para posicionármonos na historia da ciencia e nestes acontecementos, compre dicir que no xermolo desta relación (a da IUPAC co Sistema Periódico) está o congreso de Karlsruhe do ano 1860, que daría lugar tanto á aparición da actual táboa periódica como no futuro á constitución da IUPAC e á súa presenza continua na denominación dos elementos químicos.
O GALICION FOI NOMEADO OGANESSON. A UTILIDADE DA PREDICIBILIDADE QUÍMICA DE MENDELEEV NA DIDÁCTICA DA AULA
Authors:   Universidade de Santiago de Compostela, Bermejo Manuel R. , González-Noya Ana M. , Pedrido Rosa , Romero María J.
Published: January 2022

Hai máis de 40 anos, un de nós e outros profesores do departamento de Química Inorgánica da USC, publicamos o libro “Química Inorgánica. Esquema orientativo y cuestiones fundamentales”. Nese libro pretendiamos desenvolver máis e mellor o temario da materia de Química Inorgánica nesa época e, ao mesmo tempo, facer propostas de cuestións de dificultade crecente, para resolver nos seminarios, que levaran ao alumnado a afondar e comprender mellor os distintos conceptos básicos de dita materia. Neses seminarios pretendíase facer soñar ao alumnado coa posibilidade de construír nova química, partindo dos conceptos teóricos aprendidos na aula, e amosarlles como se podía conseguir. O libro era o resultado das experiencias nosas, na aula e nos seminarios, axudando ao noso alumnado a afondar nos coñecementos teóricos necesarios para poder desenvolver e construír a nova química inorgánica. Nun dos moitos exercicios propostos dicíase: “Vense de sintetizar o novísimo elemento químico artificial con Z= 118, chamado Galicion. Escribe a súa configuración electrónica e fai a predición de: grupo do sistema periódico ao que pertence; algunhas das súas propiedades físicas; o comportamento químico que é previsible poida presentar; etc.”.
Agronomic Performance and Genetic Fidelity of the Selected Elite Cocoa Clones Derived from Somatic Embryogenesis Culture
Authors: Entuni Gibson , Nori Hollena , Edward Rebicca , Kamil bin Mohammad Jaafar Ahmad
Published: January 2022

This study was conducted to compare the agronomic performance of four elite cocoa clones (MCBC1, KKM22, KKM4 and PBC230) regenerated from staminode and immature zygotic embryo culture with conventional grafted cocoa clones. From the results, it was found that the KKM4 clone propagated from immature zygotic embryo culture exhibited variations in the fresh pod weight (339.6 g), fresh individual seed weight (4.13 g) and number of flat beans per pod (4 beans) compared with the rest of the regenerated clones. The genetic stability of the somatic embryogenesis cultured clones and the donor clones was then tested using fragment analysis with five SSR primers, i.e. mTcCIR7, mTcCIR18, mTcCIR22, mTcCIR33 and mTcCIR40. Four of these primers identified variations in the allele size and allele addition in KKM4 clone from immature zygotic embryo. Molecular analysis validated that the difference in agronomic performance of the KKM4 clone from immature zygotic embryo culture was due to genetic mutation created during the immature zygotic embryo culture process.
Energy Absorption Capacity of Concrete-Filled Steel Tube Slender Columns with Different Aspect Ratios
Authors: Bahrami Alireza , Mahmoudi Kouhi Ali
Published: January 2022

The present paper examines the energy absorption capacity of concrete-filled steel tube slender (CFTS) columns having different aspect ratios. The CFTS columns are nonlinearly analysed employing the finite element software ABAQUS. In order to validate the simulation of the columns, an experimentally tested CFTS column is simulated and its achieved result is compared with that of the tested column. Since it is concluded that there is a good agreement between the obtained results from the simulation and experimental test, the validation of the simulation is then established. The simulated columns are thereafter developed using different aspect ratios of 6, 10, and 13 and also considering the following parameters: load eccentricities, cross-sectional shapes, and steel tube thicknesses. The columns are nonlinearly analysed and the results are achieved from the analyses. The effects of the above-mentioned parameters on the energy absorption capacity of the CFTS columns are evaluated. From the results, it can be concluded that the energy absorption capacity of the columns is decreased by the increase of the load eccentricity or aspect ratio. Further, the energy absorption capacity of the circular CFTS column is greater than that of the rectangular and square CFTS columns. However, higher energy absorption capacity is accomplished for the rectangular column than the square column. Additionally, increasing the steel tube thickness leads to greater energy absorption capacity of the columns. Typical failure modes of the columns are assessed.
Penerapan Activity Based Costing System Dalam Menentukan Harga Pokok Jasa Pemasangan GPS pada PT SLI
Authors: Nur Hidayah Beta , Kustiningsih Nanik
Published: January 2022

Meningkatnya persaingan yang terjadi pada industri jasa Global Positioning System (GPS) mengharuskan PT SLI  untuk membuat strategi baru dalam memenangkan persaingan yaitu dengan meningkatkan kualitas pelayanan dan menekan harga jual. Semakin rendah harga jual maka tingkat penjualan jasa akan semakin tinggi. Metode activity based costing system (ABC) dinilai sangat efektif  dan akurat dalam menentukan harga pokok produksi karena pembebanan biayanya berdasarkan aktivitas dan perilaku aktivitas yang terjadi. Tujuan penelitian ini adalah untuk membandingkan harga pokok jasa yang dihitung menggunakan metode activity based costing system dengan metode akuntansi biaya tradisional yang diterapkan pada PT SLI. Penelitian ini menggunakan jenis penelitian deskriptif komparatif dengan objek PT SLI dan subjek semua paket gps yang ada di PT SLI yaitu W, E dan G. Sumber data yang digunakan adalah data primer dan data sekunder dengan dua teknik pengumpulan data yaitu penelitian lapangan (field research) dan penelitian kepustakaan (library research). Hasil penelitian menunjukkan bahwa adanya selisih lebih rendah harga pokok jasa pemasangan gps yang dihitung dengan metode activity based costing system daripada metode yang diterapkan oleh PT SLI. PT SLI sebaiknya mempertimbangkan metode activity based costing system dalam menentukan harga pokok jasa untuk pengambilan keputusan dimasa yang akan datang
Metakognisi siswa dalam pemecahan masalah matematika ditinjau dari gaya belajar
Authors: Roni Irwansyah Roni Irwansyah , Sofyan Mahfudy Sofyan Mahfudy
Published: January 2022

The purpose of this study was to describe students' metacognition in solving mathematical problems in terms of learning styles. The method in this research is descriptive qualitative. The subjects in this study were students. Data collection techniques used are questionnaires, tests and interviews. The analysis technique used consists of three components, namely data reduction, data presentation, and drawing conclusions. The results of this study indicate that there are differences in students' metacognition processes, namely: a) The metacognitive process of visual students is moderate. It can be seen when students plan, use information from problems to answer questions well. When monitoring, students check the information obtained when solving a given problem. When evaluating, students are incomplete in writing the final results at the conclusion. b) The process of auditory students' metacognition is lacking. It can be seen when students plan, do not draw and write down the information provided. When monitoring, students check the information obtained when solving a given problem. When evaluating, students re-check the completion that has been done but the final result is incomplete. c) High kinesthetic students' metacognition process. It can be seen when students plan, explain and write down what is in the problem, describe and write down what is known and asked about the problem. When monitoring, students choose the concept of completion correctly, apply the information obtained to concepts that have been thought out and are thorough in answering questions and believe that the answer process is correct. When evaluating, accuracy in writing the final results that have been done rightly and correctly.
Problems and prospects for the development of hydrocarbon resources in the context of the global transition to clean energy
Authors:   Kazan (Volga region) Federal University, Kazan, Russia, Uspensky B. V. , Khasanov R. R. ,   Institute of Ecology and Subsoil Use of the Academy of Sciences of the Republic of Tatarstan, Shagidullin R. R. ,   Institute of Ecology and Subsoil Use of the Academy of Sciences of the Republic of Tatarstan, Gafurov Sh. Z. ,   Kazan (Volga region) Federal University, Kazan, Russia
Published: January 2022

Decarbonization of the world economy is one of the main trends in global development of the last decade. The beginning of the transition of the world economy to green energy poses new tasks and challenges for the geological exploration industry as well as for the fuel and energy complex. Currently, the most demanded energy-chemical resources are oil, natural gas and, to a lesser extent, coal. Their production has approached the maximum possible level and in the near future will inevitably begin to decline. However, due to large investments and highly efficient technologies, the process of switching to alternative energy sources may drag on for a long period, during which traditional hydrocarbons will remain the basis of the energy sector in many countries. The share of hard-to-recover reserves in the world is constantly growing; in Russia, it currently exceeds 65%. Hard-to-recover reserves include, in particular, reserves of highviscosity oils and bitumen (with a viscosity of more than 30 mPa·s). The article discusses the prospects and possible ways of developing bitumen and coal deposits within the Volga-Ural oil and gas basin. Keywords: decarbonization; natural bitumen; heavy oil; coal seams; thermal treatment.
The effect of clay minerals on conversion of Yarega heavy oil during catalytic aquathermolysis process
Authors:   Kazan Federal University, Kazan, Russia, Aliev F. A. , Kiekbaev A. A. ,   Kazan Federal University, Kazan, Russia, Andreev D. V. ,   LUKOIL-Engineering limited. PermNIPIneft Branch office in Perm, Perm, Russia, Mitroshin A. V. ,   LUKOIL-Engineering limited. PermNIPIneft Branch office in Perm, Perm, Russia
Published: January 2022

In this study we present the results of physical stimulation of in-situ aquathermolysis process carried out on heavy crude oil sample from Yarega (Russia) oil field in the presence of nickel/iron tallates and clay minerals. The experimental results revealed that clay minerals as the co-catalyst show the best performance at 300 °C in case of nickel tallates, where the viscosity of aquathermolysis products reduces by 4 times in contrast to the initial crude oil. Moreover, the content of saturated fraction isolated from the catalytic aquathermolysis products increased from 36.8 to 50.2 in contrast to the saturated fraction of initial crude oil, while the amount of resins decreased by two times after hydrothermal treatment in the presence of nickel catalyst and clay minerals. Thus, the obtained results justify the involvement of clay minerals to the aquathermolysis process and demonstrate catalytic performance in terms of enhancing group composition and viscosity reduction. Keywords: heavy oil; upgrading; catalysts; aquathermolysis; clay minerals; transition metals; SARA; rheology.
The expansion of innovative activity on rise of oil production enterprises in Azerbaijan
Authors:   Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Huseynov A. G. , Huseynov E. A. ,   «OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
Published: January 2022

The article analysis the oil and gas production condition in the Republic on basis of statistical data of many years as well as the level of investment provision. The article estimates the structure of expenses on innovative techniques, the condition of exploitation of oil and gas boreholes, the implementation of geological and technological actions, the ways of exploitation methods as well as the methods of ledge effects and influence on extra oil production. It also shows up the reserves and ways of their rational usage. Keywords: innovative activity; geological and technological actions; oil and gas; well.
Effects of a rough surface vortex breaker hydrocyclone on the separating capacity of heterogeneous fluid systems
Authors:   Siberian Federal University, Krasnoyarsk, Russia, Bashmur K. A. , Petrovsky E. A. ,   Siberian Federal University, Krasnoyarsk, Russia, Tynchenko V. S. ,   Siberian Federal University, Krasnoyarsk, Russia,   Institute of Computer Science and Telecommunications, Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia, Bukhtoyarov V. V. ,   Siberian Federal University, Krasnoyarsk, Russia,   Institute of Computer Science and Telecommunications, Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia, Sergienko R. B. ,   Gini Gmbh, Munich, Germany, Kolenchukov O. A. ,   Siberian Federal University, Krasnoyarsk, Russia
Published: January 2022

This paper considers the issue of heterogeneous system separation efficiency under the action of centrifugal forces working in hydrocyclones. The main problem with these apparatuses is related to vortex forming. The paper describes the negative effects of vortexes on the heterogeneous medium separation process. A hydrocyclone design was developed and described, which improves the hydrocyclone separation capacity. This design introduces a vortex breaker. Furthermore, vortex formation can be eliminated or minimized by providing the vortex breaker with a rough surface. To determine the separation efficiency and the adequacy of the proposed solution, hydrodynamic computer simulation and experimental studies were conducted. Solidworks Flow Simulation software was used for hydrodynamic computer simulation. To check the medium separation degree, an experimental study was conducted showing improvement of the hydrocyclone separation capacity efficiency by 3% in the developed apparatus compared to conventional hydrocyclone designs. Keywords: hydrocyclone; separation; separating capacity; vortex breaker; heterogeneous system; oil preparation; hydrodynamics.
Water cut forecast after downhole pumping equipment optimization based on displacement characteristics
Authors:   Ufa State Petroleum Technological University, Ufa, Russia, Grishchenko V. A. , Pozhitkova S. S. ,   Ufa State Petroleum Technological University, Ufa, Russia, Mukhametshin V. Sh. ,   Ufa State Petroleum Technological University, Ufa, Russia, Yakupov R. F. ,   Ufa State Petroleum Technological University, Ufa, Russia
Published: January 2022

The article deals with the issue of water cut predicting when downhole pumping equipment optimizing. In practice, an expert assessment of this parameter is used as a rule, which does not take into account the degree of planned optimization relative to the current mode. The paper proposes a methodology allowing taking into account the dynamics of planned fluid withdrawals in predicting water cut based on displacement characteristics. To solve the described problem, four characteristics were selected with a certain type of statistical dependence, where, in one part of the equation, fluid withdrawals do not depend on oil withdrawals. This allows, by setting different values of fluid production, to predict oil production and water cut at any time period. On the example of deposits of one of the regions of the Ural-Volga region, the most suitable for certain geological conditions displacement characteristics were determined. Look back analysis shows a high degree of convergence between the calculated and actual water cut indicators – the average absolute deviation is 1.9%, which allows forecasting with sufficient accuracy. Keywords: oil fields development; production stimulation; displacement characteristics; water cut.
Methodological approaches to increasing the flooding system efficiency at the later stage of reservoir development
Authors:   Ufa State Petroleum Technological University, Ufa, Russia, Grishchenko V. A. , Tsiklis I. M. ,   Ufa State Petroleum Technological University, Ufa, Russia, Mukhametshin V. Sh. ,   Ufa State Petroleum Technological University, Ufa, Russia, Yakupov R. F. ,   Ufa State Petroleum Technological University, Ufa, Russia
Published: January 2022

Based on the analysis of the efficiency of CVI.1 and CVI.2 oil reservoirs development, which partially coincide in structural terms, and the terrigenous strata of the Lower Carboniferous of one of Volga-Ural oil and gas province oil fields, an algorithm for assessing the efficiency of waterflooding was proposed, which takes into account the geological structure of the facility, the results of core and geophysical well surveys, as well as the historical performance of wells. The presented algorithm makes it possible to identify ineffective injection directions for making decisions on waterflooding system optimizing. The effect is the identified potential to cut costs by reducing inefficient injection, as well as identifying areas for the introduction of enhanced oil recovery techniques. Keywords: field development; reservoir pressure maintenance system; waterflooding efficiency; cost reduction.
Improving the waterproofing efficiency by using a plugging compound
Authors:   Ufa State Petroleum Technological University, Ufa, Russia, Fattakhov I. G. ,   PJSC Tatneft named after V.D. Shashin, Almetyevsk, Russia, Kuleshova L. S. ,   Ufa State Petroleum Technological University, Ufa, Russia, Sultanov Sh. Kh. ,   Ufa State Petroleum Technological University, Ufa, Russia, Mukhametshin V. V. ,   Ufa State Petroleum Technological University, Ufa, Russia, Zhirkeev A. S. ,   PJSC Tatneft named after V.D. Shashin, Almetyevsk, Russia, Sakhapova A. K. ,   PJSC Tatneft named after V.D. Shashin, Almetyevsk, Russia
Published: January 2022

Increasing the efficiency of water shut-off works is one of the important tasks for the sustainable well operation. The article discusses the use of various plugging compositions for water inflow into a well isolating, their advantages and disadvantages, conditions of use, and presents the results of a study of the proposed composition. The composition of an aqueous solution of polyaluminium chloride and a suspension of gypsum anhydrite is considered. The composition contains 45-55 mass percent of 15-25 percent aqueous solution of polyaluminium chloride and 45-55 mass percent suspension of gypsum anhydrite at a water-solid ratio of 0.9. The technical result is an increase in the efficiency of water inflow into the well isolating by obtaining a homogeneous, dense plugging mass formed by mixing the components of the composition and gaining maximum strength over time. Keywords: well; water cut; isolation; water inflow; plugging mass; bottomhole formation zone; oil production; polyaluminium chloride; anhydrite.
Evolution of hydraulic fracturing fluid: from guar systems to synthetic gelling polymers
Authors:   Ufa State Petroleum Technological University, Ufa, Russia, Stabinskas A. P. , Sultanov Sh. Kh. ,   Ufa State Petroleum Technological University, Ufa, Russia, Mukhametshin V. Sh. ,   Ufa State Petroleum Technological University, Ufa, Russia, Kuleshova L. S. ,   Ufa State Petroleum Technological University, Ufa, Russia, Churakov A. V. ,   Gazpromneft Science & Technology Center, Saint-Petersburg, Russia, Safiullina A. R. ,   Ufa State Petroleum Technological University, Ufa, Russia, Veliev E. M. ,   Ufa State Petroleum Technological University, Ufa, Russia
Published: January 2022

The paper presents the possibilities of optimizing technological approaches for performing hydraulic fracturing operations, taking into account the transition from traditionally used chemical components of the process fluid to synthetic gelling polymers. The proposed option makes it possible to reduce the unit costs of operational activities to increase oil production both for new assets of oil and gas producing companies and for assets at the stage of industrial development. The special emphasis of the proposed technological solutions is correlated with the environmental Agenda for Sustainable Development until 2030, aimed at transforming the production processes of the energy complex to reduce the ecological footprint of enterprises. A complete set of laboratory studies confirms the prospect of industrial application of synthetic polymer systems and the feasibility of replicating this approach. The subsequent stage of scale-up of pilot tests will allow to have a basis for development and implementation of standards in the oil and gas industry. Keywords: oil; well; hydraulic fracturing; chemicals; synthetic gelling polymers.
Research and application of natural zeolite in the processes of gas purification and drying
Authors:   Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Alekberov Y. Z. , Khalilov R. Z. ,   Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Ismailova X. G. ,   Azerbaijan State Oil and Industry University, Baku, Azerbaijan
Published: January 2022

This article describes the adsorption capability of natural zeolites for the purification and dehydration of natural gases. Studies were carried out with natural clinoptilolite treated with various cadmium and titanium solutions. Zeolite-containing rocks were used as a natural adsorbent and experiments using a synthetic CaA zeolite were also carried for comparison. The experiments showed that zeolite from the Ai-Dag deposits possesses the highest activity in terms of sulfur compound. Its activity is closer to that of synthetic CaA zeolite. Studies showed that natural zeolites and adsorbents obtained on their basis allow the gas to be dehydrated to a dew point temperature of minus 40-45 °C. This is sufficient to prepare gas for transportation directly from the fields under any climatic conditions. Keywords: gas dehydration; zeolite; adsorbent; sulfur compounds.
Methodological approach to the resource base efficiency monitoring in oil fields development
Authors:   Ufa State Petroleum Technological University, Ufa, Russia, Grishchenko V. A. , Asylgareev I. N. ,   Ufa State Petroleum Technological University, Ufa, Russia, Bakhtizin R. N. ,   Ufa State Petroleum Technological University, Ufa, Russia, Mukhametshin V. V. ,   Ufa State Petroleum Technological University, Ufa, Russia, Yakupov R. F. ,   Ufa State Petroleum Technological University, Ufa, Russia
Published: January 2022

The article discusses the issue of resource base management in a complex structure of residual reserves. To increase the efficiency of the reserves development, constant monitoring of their distribution is necessary - how much they are involved, is there any potential for additional involvement, how efficient are the areas already involved in development. The paper proposes a methodological approach to the residual reserves control process organization, which allows planning and adjusting the program of reserves development. This is of particular relevance for companies that develop assets in the late stages of development, which do not have the ability to indiscriminate drilling. On the example of one of the enterprises developing assets in the Volga-Ural oil and gas province, the structuring of residual reserves was carried out, on the basis of which a strategy for increasing the reserves involvement in development was formed. To analyze the efficiency of reserves recovery in the involved areas, a reserve utilization factor based on the displacement forecast is proposed. Its implementation made it possible to identify problem areas, on the example of one of which a highly effective program for drilling horizontal wells was subsequently implemented. Keywords: oil fields development; oil reserves; resource management; reserves development; horizontal wells.
Fungsi Administrasi Keuangan Pada Badan Pengelolaan Keuangan dan Aset Daerah Kantor Gubernur Sulawesi Tengah
Authors: Zainuddin Zainuddin , Ari Putra  , Isbon Pageno
Published: January 2022

The purpose of this study was to analyze the administrative function of the Regional Financial and Asset Management Agency of the Central Sulawesi Governor's Office, the number of informants in this study was 5 (five) people who were leaders and staff.

The method used in this research is qualitative. The data collected in this study are primary data and secondary data. Primary data were obtained through interviews with informants related to the research. Interviews were conducted using interview guidelines and interviews conducted in this study to obtain qualitative information that can strengthen qualitative analysis.

The results showed that the administrative function of the Regional Financial and Asset Management Agency of the Central Sulawesi Governor's Office was running well, but there were still obstacles where the employees who were placed were not in accordance with their expertise or knowledge, and needed improvements in organization and planned supervision.
Kualitas Pelayanan Kartu Tanda Penduduk Elektronik Di Dinas Kependudukan dan Pencatatan Sipil Kota Palu
Authors: Soenoe Burhanuddin , Selfana Selfana , Alamsyah M Nur
Published: January 2022

This study examines the Quality of Electronic Identity Card Services at the Department of Population and Civil Registration of Palu City. The types of data used are primary data and secondary data. Data collection techniques, carried out through observation, interviews, and documentation. Informant withdrawal technique using purposive. The number of informants in this study amounted to 5 people. The theory used is the theory of Zethmal, Parasuraman and Berry, which consists of 5 (five) aspects : tangibles, reliability, responsiveness, assurance and empathy. Based on the results of research conducted, that the quality of Electronic Identity Card Services at the Population and Civil Registration Office of Palu City is not optimal. First; tangibles, namely inadequate facilities and infrastructure such as the lack of space for waiting rooms and limited available seats, as well as public toilets that look unclean. But in terms of the appearance of the apparatus is quite good. Second; reliability, namely the ability of the apparatus to use assistive devices is good, it's just that the services provided do not fully refer to the service flow. Third; responsiveness, namely the response of the apparatus who received the applicant's complaint was very good, but the speed of processing electronic identity cards was not maximized. Fourth; assurance, which is the guarantee given by the apparatus to the applicants that is not on time. However, the permit fee charged is in accordance with applicable regulations. Fifth; empathy, namely the service provided is not discriminatory and the apparatus always provides courteous and friendly service. Thus, from the five aspects of service quality above, there are still several things that need to be addressed, so that the quality of service provided can be maximized.