bluuebunny/crossref_metadata_2025 huggingface dataset:
The Nexus of GDP and Sustainability: Indonesia's Renewable Energy, Natural Resource Rent, and Economic Growth
Authors: Harnani Sri , Puspaningtyas Meinarti , Bawono Suryaning , Afif Muhammad
Published: October 2024

This study aims to explore and test the relationship between GDP and renewable electricity output, renewable energy consumption, and total natural resource rent in Indonesia. It uses Vector Error Correction Model (VECM) analysis on World Bank data from 1995 to 2019, with a primary focus on Indonesia, to investigate the complex relationship between GDP and key sustainability metrics. This analysis highlights how Indonesia’s economic growth is influenced by changes in the consumption of renewable energy, utilization of natural resources, and its impact on the environment over a span of 25 years. Ultimately, this research provides important insights for policy makers and researchers on Indonesia’s evolving sustainability landscape, thereby facilitating the development of strategies that balance economic growth and prosperity, and environmental conservation.
Keywords: GDP, renewable electricity output, renewable energy consumption, total natural resource rent
Enhancing Teacher Performance Through Professional Competency and Workplace Spirituality
Authors: Amini Rosdiana , Sanusi Anwar , Supriadi Bambang
Published: October 2024

This research aimed to analyze the influence of teacher professional competence on teacher performance, and workplace spirituality. The sample consisted of 182 high school teachers in Malang City, with a standard error of 7%. The analysis tool used was Intelligent PLS. This research shows that professional competence can facilitate teacher mastery of teaching materials and a spiritual attitude that supports the learning process. The results of this research can inform education managers about how to improve teachers’ abilities in teaching and learning process activities and mastery of teaching materials. They can also be a policy consideration for the education department to develop teacher performance in Malang City.
Keywords: professional competence, workplace spirituality, teacher performance
The Influence of Transformational Leadership Style, Organizational Culture, and Work Motivation on Job Satisfaction and Employee Performance in the Blitar City Government Environment
Authors: Sabtoni Mohamad Agus , Kustiani Lilik , Sugito Pudjo
Published: October 2024

The article describes the impact of transformational leadership style, organizational culture, and work motivation on job satisfaction and employee performance, with employee engagement as an intervening variable. A total of 274 employees within the Blitar City Government were selected for the research sample. The research hypothesis was tested using Structural Equation Modeling (SEM) Analysis with Smart PLS. The research results show 1) that transformational leadership style, organizational culture, and work motivation influence job satisfaction and employee performance, 2) that job satisfaction influences employee performance, and 3) that job satisfaction can mediate the influence of transformational leadership style, organizational culture, and work motivation on employee performance. Employee engagement strengthens the relationship between job satisfaction and employee performance. Overall, this research provides in-depth insight into the complexity of the relationship between transformational leadership style, organizational culture, work motivation, job satisfaction, employee engagement, and employee performance in the Blitar City Government. It is hoped that this research will be able to provide guidance for better human resource management policies and practices.
Keywords: transformational leadership style, organizational culture, work motivation, job satisfaction, employee engagement, employee performance
Quasi-Optimal Control Law for Lagrangian Systems with a Deficit of Control Influences
Authors: Kostoglotov Andrey A.
Published: October 2024

Mechanical systems with a deficit of control influences are essentially nonlinear dynamic systems of high order, which are characterized by the presence of significant dynamic interaction between the elements. Therefore, the task of control synthesis should be considered in the initial nonlinear formulation, since the use of linear synthesis methods can lead to a loss of stability or significantly worsen the quality of the control process. When solving the problem of synthesis with a deficit of control influences, it is advisable to analyze such a mechanical system as a non-stationary one and use the principle of decomposition in conjunction with the maximum condition of generalized power, which makes it possible to find the structure of a universal two-level control system. The resulting quasi-optimal control provides an increase in the stability area and the quality of the transient process in terms of a quadratic criterion in comparison with known linear algorithms.
Slope and Altitude Dependency of Lightning Discharges and Fires from Thunderstorms in Mountainous Terrain (Case Study of the Altai Republic Territory)
Authors: Karanin Andrey V. , Belikova Marina Yu. , Kocheeva Nina А. , Kakorin Victor A.
Published: October 2024

The aim of the proposed study is to analyze the relationship of lightning discharges and fires from thunderstorms to altitude above sea level and slope angle of the terrain. It has been found that the highest proportion and density of fires are characteristic of the altitude range from 1000 to 1500 meters above sea level. The highest density of lightning activity is observed in the altitude range of 500-750 meters. With further increase in altitude, the density of lightning and fires decreases. A direct correlation has been noted between the increase in fire density and the increase in slope steepness up to 35 degrees. The study is based on data from the World Wide Lightning Location Network (WWLLN) and fire data provided by the Ministry of Natural Resources, Ecology and Tourism of the Altai Republic and the Altai State Natural Biosphere Reserve. The assessment of morphometric dependence of thunderstorm forest fires on the studied territory is conducted for the first time.
Agroclimatic Assessment of the Overwintering Period of Winter Wheat in the Central Black Earth Economic Region
Authors: Smirnov Ivan A.
Published: October 2024

This study was conducted in order to identify the most significant, in terms of influence, agroclimatic indicators of the overwintering period for winter wheat in the territories of the regions that are part of the Central Black Earth Economic Region. For this purpose, meteorological data on average, minimum and maximum air temperature, precipitation and snow cover height for the period from 1993 to 2022 were used, and a correlation and regression analysis of the dependence of the yield of this crop on the calculated indicators was carried out. During the analysis, statistically significant dependences of winter wheat yield on a number of agroclimatic indicators of the overwintering period were considered, revealed when using the Fisher criterion and estimating the P-values of the coefficients of the regression equation. According to the results of the analysis, the most significant indicators of the overwintering period are: the average air temperature for the coldest month and the coldest five-day period, the duration of the period between the dates of a steady transition of air temperature through 0℃ in autumn and spring, as well as the sum of negative air temperatures between these dates. The results obtained can potentially be more visible when using a larger amount of data, as well as when performing multiple regression.
Nursing Students’ Health Perceptions and Affecting Factors
Authors: Çelik Yasemin
Published: October 2024

This research was conducted to determine the health perception levels of nursing students and the influencing factors. The descriptive cross-sectional study was conducted between August 2023 and September 2023. The sample of the study consisted of 138 students studying in the Nursing Department of the Faculty of Health Sciences in the Aegean region who volunteered to participate in the study. The socio-demographic information (12 questions) questionnaire form and the Health Perception scale (15 questions) developed in line with the literature were used to collect data. The data were evaluated in the SPSS 27.00 package program. As a result of the research, it was determined that the average score that the students got from the health perception scale was 38.99±5.24. When the sub-dimensions of the health perception scale were examined; The Control Center sub-scale average score was determined as 12.82±3.15, the Certainty sub-scale average score as 12.44±2.75, the Importance of Health sub-scale average score as 6.90±1.97, and the Self-awareness sub-scale average score as 6.83±1.70. While there was a significant difference between the students' family type, smoking, financial level, health level, place of residence and family health status and health perception and its subgroups (P<0.05), it was determined that there was no statistically significant difference between age, gender, parental education level, chronic disease and regular medication use (P>0.05). It was concluded that the students' health perception general score and subscale scores were not at the desired level and that various factors negatively affected these scores in general. Various strategies should be planned to strengthen students' health perceptions.
La biomasse et l'évolution de sa répartition au cours de la croissance d'Acacia senegal dans une savane sahélienne (Sénégal)
Authors: Poupon Henri
Published: October 2024

Les biomasses et la production primaire nette (en termes de poids de matière sèche) d'Acacia senegal (L) Willd ont été mesurées dans la savane sahélienne du Ferlo, au nord du Sénégal.L'auteur étudie d'abord la structure du peuplement dans un quadrat expérimental de 25 hectares comprenant cinq types de relief. Il cherche à établir les relations entre le nombre de cernes de croissance et la circonférence mesurée à la base du fût.Il démontre ensuite l'évolution des biomasses aériennes et souterraines en fonction de l'âge des arbres. Les jeunes arbres développent rapidement un système racinaire important. Pour un arbre adulte, celui-ci représente 40 % en poids de la biomasse totale ; la biomasse aérienne est ensuite également répartie entre ses trois composantes : le tronc, les branches principales et les branches secondaires.Enfin, l'auteur estime pour l'année 1973 la production feuillue (feuilles, fleurs et fruits) et donne un premier calcul de la productivité foliaire.
La mise en valeur des richesses forestières en Amazonie brésilienne et en Colombie. Perspectives, à moyen terme, d'importations en provenance de ces pays de bois en grumes et sciés sur le marché français des bois tropicaux. Deuxième partie
Authors: Volatron Bernard
Published: October 2024

Dans la première partie de cet article, l'auteur a examiné l'économie forestière de l'Amazonie brésilienne, décrivant la richesse des forêts amazoniennes et le système d'exploitation forestière existant. Dans cette partie, il traite de l'industrie du bois (sciages et produits semi-finis) en Amazonie brésilienne, expliquant les problèmes de commercialisation des grumes, des sciages, des placages et des contreplaqués sur les marchés d'exportation, sur le marché local et sur le marché national brésilien.L'auteur estime que la valeur économique des forêts amazoniennes augmente chaque année et que la production des industries du bois augmentera régulièrement, même si elle profitera davantage au marché national brésilien qu'aux marchés d'exportation.
Comparative Education
Authors: Epstein Erwin H.
Published: October 2024

As part of the celebration of the 40th anniversary of the Brazilian Society of Comparative Education, the Revista Brasileira de Educação Comparada welcomes the contribution of Professor Erwin Epstein, who reflects on epistemological questions about the research field of Comparative Education and its identity.
Entrevista al Prof. Dr. Norberto Fernandez Lamarra
Authors: Lamarra Norberto Fernandez
Published: October 2024

En el marco de la celebración del 40 aniversario de la Sociedad Brasileña de Educación Comparada, la Revista Brasileña de Educación Comparada entrevista al Prof. Dr. Norberto Fernandez Lamarra.
IMPLICATIONS OF SHARIA ECONOMIC LAW FOR HALAL CERTIFICATION ON IMPORTED PRODUCTS IN INDONESIA
Authors: Rismilda Nela Aprilia , Supangat Supangat , Rifqi Lathif Hanafir
Published: October 2024

The rapid flow of globalization certainly impacts aspects of life, including the increasingly accessible economic aspect. The magnitude of free trade results in various products entering a country without strict supervision in terms of quality. Indonesia is a country with high export-import activities; this can be seen based on data from the Badan Pusat Statistik (BPS) on Imports of Beef from 2017 to 2021, which shows an increase every year. The size of imported products entering Indonesia is necessary to monitor and check the halalness of these products, considering that the majority of the population in Indonesia is Muslim. This study aims to analyze the position of halal certification of imported goods or products based on the perspective of Sharia economic law. This research uses qualitative methods with data collection techniques and literature study. The results show that the position of halal certification of imported products based on the perspective of sharia economic law has a central position as stated in the Qur'an, some hadiths of the prophet, and other sources of Islamic law for which none of these sources of law reject the existence of halalness to what Muslims need. In addition, the position of halal certification of imported goods in terms of Sharia economic law is also seen as an effort to be in harmony with Islamic teachings, which aim to bring maslahah, not mafsadah, to the people who consume.
The Differences In Quality of Sleep Among Babies Aged 3-12 Months Before and After A Baby Massage’s Class
Authors: Swandari Riska , Suminar Ervi
Published: October 2024

Introduction: The toddler years are a golden period for growth and development. One effort that parents can make to help improve the quality of their baby's sleep is by doing massage. Babies who get a massage will be able to sleep soundly, so that when they wake up their concentration is full. This study aims to prove whether there is a difference in quality of sleep among babies aged 3-12 months before and after a baby massage’s at Muhammadiyah Gresik Hospital, Indonesia
Methods: This research used a Pre-Experimental Design One Group Pre-Post Test Design using a sample of 34 subjects selected using a purposive sampling technique. The data instrument is in the form of an observation sheet before and after the massage. The variable measured in this study was improving the quality of the baby's sleep. Wilcoxon sign rank test analysis obtained a p value = 0.000.
Results: In babies aged 3-12 months before the baby massage was carried out, the results showed that the majority of babies experienced good quality sleep, 18 (53%) babies, and after the massage, the majority of babies experienced good quality sleep, 25 (74%) babies.
Conclusions: There are differences in quality of sleep among babies aged 3-12 months before and after baby massage in the baby massage class at Muhammadiyah Gresik Hospital, Indonesia. The importance of the influence of sleep on infant development because sleep is a physiological process that alternates with longer periods of wakefulness. Sleep has enormous benefits for their growth and development and optimizes their brain development, because sleep activity is one of the stimuli for the process of brain growth and development. Further research involves a larger number of samples is highly suggested.
Adaptation and Validation of the Indonesian Version of the Instrument to Measure Nursing Students' Attitudes Toward Clinical Duties
Authors: Wati Suis Galischa , Dewintaputri Vania
Published: October 2024

Introduction: Nursing students' attitudes toward clinical rotation education, play an important role in increasing their motivation to achieve goals, alertness, and ability to capture complex information. A positive attitude tends to encourage students to improve the quality and effectiveness of learning. While negative attitudes tend to decrease motivation, student interaction, attendance, and respect for staff in the clinic. The attitude toward clinical duties is a widely used instrument to identify nursing students' attitudes during clinical rotation learning which is available in English. Therefore, this study aims to adapt this instrument into an Indonesian version, so that a valid and reliable instrument is obtained.
Method: This was a descriptive quantitative study carried out in February-March 2023, through the stages of forward translation, synthesis, backward translation, expert review, and instrument testing based on Beaton's cross-cultural adaptation framework. This study involved 33 nursing clinical rotation students, using a Consecutive sampling technique. The Correlation validity was tested using Pearson Product Moment with 95% CI (p=0.05) and Cronbach alpha was used to identify the internal consistency.
Results: The mean I-CVI and S-CVI/Ave of the instrument was 1.00. The results showed that 19 of the 25 question items tested had an r-count larger than the r-table (>0.344). The internal consistency test using Cronbach alpha showed a value of α = 0.916.
Conclusions: The Indonesian version of the attitude towards clinical duties instrument with 19 questions has good content validity with excellent internal consistency value.
Nurses’ Knowledge, Attitude, and Practice of Implementing Heart Failure Management Guidelines
Authors: Jideofor Racheal C. , Galanza Jefferson S.
Published: October 2024

Introduction: Heart failure presents a global concern with significant morbidity and mortality rates. In Nigeria, Heart failure has become prevalent, with patients exhibiting inadequate self-care due to nurses' limited knowledge of management guidelines, lack of motivation to utilize clinical practice guidelines, and difficulties implementing management guidelines that incorporate patient education. The study analyzed the nurses' level of knowledge, degree of attitude, and extent of practicing education on heart failure management guidelines. Also, the relationship between nurses' knowledge and practice in implementing heart failure management guidelines.
Methods: This quantitative study employed a descriptive-correlational survey design. Purposive sampling was employed to select two government-owned hospitals in northeast Nigeria. A stratified random sampling technique was utilized to recruit two hundred twenty (220) nurse respondents.  A self-made survey questionnaire was utilized to gain more extensive information from respondents. Data were analyzed using descriptive statistics and Spearman's correlation.
Results: The results showed nurses' insufficient knowledge (Mean 14.5 ± 2.91) of heart failure management guidelines, favorable attitude (mean 4.37 ± 0.43), and high extent of practice (mean 4.16 ± 0.66). Furthermore, a very weak, no significant negative correlation was discovered between knowledge and practice of Heart Failure management guidelines.
Conclusions: Nurses showed positive attitudes toward heart failure patient care, yet inconsistently engaged in patient education despite recognizing its benefits. The absence of a relationship between nurses' knowledge and practice of patient education underscores the need to address factors impeding patient education.
Transarterial intervention therapy combined with systemic therapy for HCC: a review of recent five-year articles
Authors: Fu Chao , Chen Hongsen , Chen Yifan , Liu Wenbin , Cao Guangwen
Published: October 2024

Recently, the combination of interventional and systemic therapies has become an essential treatment modality for primary liver cancer (PLC). Interventional therapy might promote tumor necrosis and enhance immunogenicity, while the combination with systemic therapy further augments clinical efficacy. Clinical studies have demonstrated that, compared with interventional therapy alone, the combination of interventional therapy with either immunotherapy or targeted therapy can significantly improve tumor response rate and extend the survival period. Furthermore, the synergistic therapeutic approach may enable patients with initially unresectable hepatocellular carcinoma (HCC) to undergo surgery, thus enhancing the overall therapeutic outcome. The combined therapy not only maintains the occurrence and severity of adverse effects at a manageable level but also ensures that any associated adverse effects remain within a controllable scope. Most recent studies are retrospective analyses with small sample sizes. There is an imperative need for more large-scale, prospective, randomized controlled clinical trials to elucidate the optimal combination therapy modality and to identify the ideal patient group for treatment.
Comparative analysis of post-procedural symptom patterns after intragastric balloon and endoscopic sleeve gastroplasty
Authors: Castagneto-Gissey Lidia , Russo Maria Francesca , Ernesti Ilaria , Gualtieri Loredana , Genco Martina , Casella Giovanni , Di Lorenzo Nicola
Published: October 2024

Aim: Endoscopic bariatric and metabolic therapies (EBMTs) offer minimally invasive approaches for obesity management, with intragastric balloon (IGB) and endoscopic sleeve gastroplasty (ESG) being amongst the most prominent interventions. While both are effective, their comparative impact on post-procedural gastric symptoms remains underexplored.

Methods: Single-center retrospective study was designed to evaluate the incidence of post-procedure symptoms in patients undergoing IGB and ESG. Incidence and severity of gastric symptoms were assessed using visual analog scales at various time points. Weight outcomes and medication usage were also recorded. Changes at different time points (baseline, one and four months) were compared by means of Mann-Whitney U Test. Bivariate correlations were carried out through Pearson correlation.

Results: Thirty patients undergoing IGB placement and 13 patients undergoing ESG were included in the analysis. ESG group showed a significant reduction in BMI at four months compared to IGB (32.2 ± 4.2 vs . 34.4 ± 5.3, P = 0.05). ESG demonstrated significantly lower rates of post-procedural gastric symptoms compared to IGB, including nausea, regurgitation, vomiting, and abdominal cramps and greater satiety (P < 0.001) in the early postoperative period. Medication usage differed between groups, with higher usage of antispasmodics and antiemetics among IGB patients during the first week (P < 0.001). Symptom severity correlated with the need for antiemetics and antispasmodics.

Conclusion: This study provides insights into the management of gastric symptoms following two prominent EBMTs. While both endoscopic interventions offer viable options for obesity management, ESG emerges as a favorable choice due to its significantly lower incidence of early post-procedural gastric symptoms. Further research is warranted to refine symptom management strategies and elucidate differences in symptom profiles between IGB and ESG procedures, ultimately aiming to optimize treatment efficacy and patient satisfaction in the field of endoscopic obesity interventions.
Maximized Ir atom utilization via downsizing active sites to single-atom scale for highly stable dry reforming of methane
Authors: Li Yangyang , Liu Cun , Su Yang , Zhao Yang , Qiao Botao
Published: October 2024

Noble metals such as iridium with high Tammann temperature are inclined to sintering resistance and may be promising in the high-temperature dry reforming of methane (DRM) process, yet the low atom utilization remains intractable. Herein, we synthesized Ir/TiO2 catalysts via the conventional incipient wetness impregnation method and further downsized the Ir species from a nanoparticulate to a single-atom scale by gradually decreasing Ir loadings from 1.0 wt.% to 0.01 wt.%. With the advantage of single atoms for maximized atom utilization, Ir single atoms were employed to enhance atom utilization in the DRM process. Various characterizations, such as aberration-corrected high-angle annular dark-field scanning transmission electron microscopy, CO adsorbed in situ diffuse reflectance infrared Fourier transform spectra and X-ray absorption spectra demonstrated the existence of Ir single atoms in 0.01% and 0.05% Ir/TiO2. During the DRM process, Ir single-atom catalysts exhibited a better specific reaction rate of as high as 697.71 molCH4·gIr-1·h-1 at 750 °C compared with that over Ir nanoparticles of mere 447.12 molCH4·gIr-1·h-1, which unambiguously showed the remarkable Ir atom utilization over Ir single atoms. Besides, the Ir single-atom catalysts also exhibited excellent stability during the DRM process for 50 h and revealed outstanding anti-coking and good sintering-resistance properties examined by the thermal gravimetric analysis-mass spectrometer and Raman spectroscopy. The strategy of employing Ir single atoms for the maximum atom utilization in the high-temperature reaction process can pave the way for better exploitation of noble metals in other industrial reaction processes.
Experience in Using 99mTc-Technephyt Esophageal Transit Scintigraphy for Assessing Pneumatic Dilation Outcome in Patients with Achalasia Cardia
Authors: Bashirov R. A. , Shelepova A. I. , Samoilenko L. E. , Ryzhkin S. A. , Sharafutdinov B. M. , Yusupova A. F. , Ziganshina L. F. , Magomedov B. A. , Kukushkin A. I. , Matveev V. Yu. , Bashirov D. R.
Published: October 2024

Objective: to show the possibility of using 99mTc-technephyt esophageal transit scintigraphy (ETS) to assess the effect of cardiodilation in patients with achalasia cardia.Material and methods. We examined 7 patients (6 males and 1 female) aged 44–73 years (mean age 57.8 years) diagnosed with achalasia cardia, who were treated in Department of Thoracic Surgery No. 2 at Republican Clinical Hospital from June 2022 to January 2023. The disease duration before admission to the hospital ranged from 2 to 17 years (mean 9.2 years).Results. The analysis of ETS results showed a decreased radiopharmaceutical residual activity percentage in cardia for all patients after treatment compared with the initial data. It indicated a positive effect of cardiodilation and coincided with X-ray examination data. The obtained results demonstrate the possibility of ETS using and its practical significance to assess the effect of therapeutic measures, in particular cardiodilation, in patients with achalasia cardia.Conclusion. Performed according to the described protocol, ETS is a physiological and safe method for both the diagnosis of achalasia and the subsequent assessing therapeutic effect, including cardiodilation, myotomy, conservative treatment, and long-term dynamic monitoring. It is a physiological and safe procedure, which can be recommended in cases of difficulties in evaluating the esophageal function by X-ray, endoscopic and manometric methods or when their use is impossibile.
Aşırı Rol Yükünün İş Tatminine Etkisinde İş Stresinin Aracı Rolü: Kamuda ve Özel Sektörde Çalışan Öğretmenler Üzerine Bir Uygulama
Authors: Özlok Kasım Kağan , Kefci Süleyman Safa
Published: October 2024

Bu çalışmanın amacı aşırı rol yükünün iş tatmini üzerine etkisinde iş stresinin aracı rolünün araştırılmasıdır. Bu araştırmanın yapılabilmesi için Türkiye’nin çeşitli illerinde görev yapan 508 öğretmene anket uygulanmıştır. Ankete kamu ve özel sektörde çalışan öğretmenler katılmıştır. Araştırmada elde edilen veriler SPSS 24 ve Process Makro (4.2) programları aracılığıyla analize tabi tutulmuştur. Çalışmada yer alan hipotezler İş Talepleri ve Kaynakları Teorisine dayanılarak geliştirilmiştir. Verilerin analizi sonucunda aşırı rol yükünün iş stresi üzerindeki etkisinin pozitif ve anlamlı, iş tatmini üzerindeki etkisinin negatif ve anlamsız olduğu; iş stresinin ise iş tatmini üzerinde negatif ve anlamlı etkisinin olduğu sonucuna ulaşılmıştır. Aşırı rol yükünün iş tatmini üzerine etkisinde iş stresinin tam aracı etkiye sahip olduğu tespit edilmiştir. Bu sonuçlar, eğitim politikası yapıcılarının ve eğitim sektöründe görev alan yöneticilerin, öğretmenlerin verimliliklerini ve iş tatminlerini artırmalarına, iş streslerini ise azaltmalarına imkân sağlayacak politikalar üretmeleri gerekliliğini ortaya koymaktadır.
Effect of chitosan-tripolyphosphate to suppress anthracnose (Colletotrichum spp.) in post-harvest chili
Authors: Suryadi Yadi , Susilowati Dwi Ningsih , Kosasih Jajang , Tentrem Titi , Samudra I Made
Published: October 2024

Anthracnose disease (Colletotrichum spp.) in chili can lead to low fruit quantity and quality from planting to the postharvest stage. The environmentally friendly management using chitosan (CS) is expected to suppress anthracnose disease and increase the shelf-life of chili. This study aimed to determine the effect of the chitosan-tripolyphosphate (CS-TPP) to suppress anthracnose on chili during postharvest storage through in-vitro and in-vivo assays. In the in-vitro assay, CS-TPP solution with a ratio of [5:2] and [3:1] was applied into a warm Potato Dextrose Agar (PDA) medium. It was grown by Colletotrichum pathogen, while on in vivo assay, CS-TPP was applied to chili fruit before being inoculated by the pathogen. A control treatment was prepared without CS-TPP application. Results revealed that the CS-TPP ratios affected the growth of Colletotrichum spp. at the in-vitro assay. The CS-TPP [5:2] ratio was more effective than CS-TPP [3:1] in reducing the growth of Colletotrichum spp. with the fungal inhibition of 62,65% and 55,56%, respectively, compared to the control treatment. Moreover, it also showed anthracnose disease suppression on chili fruit of 51%, and 29%, respectively, compared to control treatment at in-vivo assay. This study showed the potential use of CS-TPP as a coating application for anthracnose disease management on storage chili, however further study such as viability and longevity of formula need to be done.
Studi perbandingan metode oksidasi enzimatis terhadap aktivitas antioksidan ekstrak air teh kratom (Mitragyna speciosa Korth.)
Authors: Harsanti Brigita Ratna , Purwayantie Sulvi , Fadly Dzul
Published: October 2024

One of the kratom (Mitragyna speciosa Korth.) products in Kapuas Hulu is fermented kratom tea powder, produced by the enzymatic oxidation process, which is very different from the processing of black tea. Until now, there has been no research on the manufacture of fermented kratom tea powder using the black tea enzymatic oxidation method. This study aimed to determine the differences between the enzymatic oxidation method to the antioxidant activity of water extract kratom tea. The technique used in this study was a comparative method to compare the data obtained from water extract kratom tea. The treatments compared were the manufacture of fermented kratom tea powder with the enzymatic oxidation method of the Kapuas Hulu community and the enzymatic oxidation method of black tea. The parameters tested in this study consisted of phenol content, flavonoid content, alkaloid content, and antioxidant activity. The study showed that the phenol and alkaloid contents were higher in product of black tea methods (199.22 mg GAE/g and 44.73%) than Kapuas Hulu traditional methods (50.45 mg GAE/g and 40.68%). Flavonoid content was higher in Kapuas Hulu traditional methods (169.32 mg QE/g) than black tea methods (48.77 mg QE/g). The difference was found in the antioxidant activity of the water extract kratom tea produced by two different enzymatic oxidation methods. The enzymatic oxidation of the black tea method was found to higher antioxidant activity of water extract kratom tea.
Biodegradable pot from oil palm fronds waste: production process, physical properties, and biodegradability study
Authors: Jaya Jaka Darma , Majid Abdul , Nuryati Nuryati , Ningsih Yuliana
Published: October 2024

This research investigated the potential use of oil palm frond waste as a new raw material for developing biodegradable pots (biopot), which could substitute planting containers made from petroleum-based materials such as pots or plastic polybags. This study was aimed, in particular, at examining the physical characteristics and biodegradability of biopot products. This objective was essential for ensuring that the functionality, characteristics, and biodegradability of biopots were technically acceptable for their agricultural application. Production of biopot was done by cold pressing method, which started by mixing the frond fibers as reinforcement with tapioca as a matrix and molding it using the cold pressing method. Furthermore, testing of physical characteristics includes density, moisture content, water absorption, and biodegradability in soil media. The research shows that the biopot from oil palm fronds has a density of 0.27-0.44 g / cm3, moisture content of 1.28-4.71%, and water absorption of 179.88-285.74%. The degradability of biodegradable pots ranged from 11.07-34.22%. Based on the above characteristics, the biodegradable pot from oil palm fronds has the potential to be used for planting containers. Biopot from oil palm fronds was interesting to develop since it performed suitable characteristics, compared to the Indonesian National Standard (SNI) of the similar composites product and the characteristics of biodegradable pot from other previous reliable research
Industrial Testing of a Hybrid Technology for Water Purification from the Oka River Using the Method of Charcoalization with Powdered Sorbent
Authors: Filimonova A. A. , Vlasova A. Yu. , Karnitsky N. B. , Chichirova N. D. , Kamalieva R. F.
Published: October 2024

The development of the industrial sector and the increase in production capacity have a positive effect on the economic situation of the country, but not on environmental safety. Insufficiently purified and polluted wastewater is constantly discharged into water sources, the amount of which directly depends on the industrial development of the region. Thus, the anthropogenic load on the Oka River affects the composition of water in the source, there are often bursts of instantaneous emissions, as well as the flowering of phytoplankton in the summer. The latter further significantly reduce the efficiency of water purification to drinking quality. Therefore, the development of technologies that will be able to maintain purification at the required level is an urgent task. The article presents the method of charcoalization, which allows to neutralize pollution in a short time and improve the water treatment quality. An industrial experiment of the developed technology was carried out at an operating water treatment plant with testing of two extreme do-sages of sorption material. The optimal dose of coal pulp was determined, the impact on significant purification performance was described, and the technological solutions have been developed to determine the point of coal pulp input and the dosage multiplicity. The conducted research has made it possible to expand knowledge in the field of drinking water preparation and to determine significant water parameters that are affected by the sorption purification method.
Is the Ossification of the Posterior Longitudinal Ligament a Positive Factor for the Fusion after Posterior Cervical Fusion and Decompression?
Authors: Ha Jun-Woo , Moon Bong Ju , Kim Kwang-Ryeol , Kim Kyung Hyun , Park Jeong Yoon , Chin Dong Kyu , Cho Yong Eun , Kim Keun Su , Jang Hyun Jun
Published: October 2024

Objective: Multilevel posterior cervical fusion (PCF) and decompression surgery is a viable treatment option for multilevel ossification of posterior longitudinal ligament (OPLL) and spondylotic myelopathy. Since OPLL is known to affect bone formation, this study aimed to examine the effect of OPLL on the incidence of pseudarthrosis following PCF in a cohort study. Methods: We conducted a retrospective cohort study of patients with PCF and laminectomy at our institution. This study included patients who underwent C3 to C6 posterior fusion surgery involving lateral mass screw fixation without anterior surgery for OPLL or spondylotic myelopathy. Fusion status was evaluated 1 year postoperatively with computed tomography. Bone mineral density (BMD) and sagittal parameters were also evaluated as potential contributing factors to the fusion rate.Results: Eighty patients were included. Pseudarthrosis was observed in 22.5% (n=18) of patients. Pseudarthrosis incidence was lower in patients with OPLL (spondylosis vs. OPLL, 33.3% vs. 12.2%; p=0.003), and a higher BMD T-score (pseudarthrosis vs. fusion, -1.9 ± 0.7 vs. -0.6 ± 1.3; p<0.01), a larger preoperative range of motion (ROM) (26.7 ± 13.3 vs. 17.6 ± 10.9; p=0.01), and a greater preoperative-to-postoperative decrease in cervical lordosis (-8.1 ± 7.9 vs. -2.7 ± 7.9; p<0.01). Pseudarthrosis was associated with worsening neck pain after surgery. Conclusion: The absence of OPLL, lower BMD, larger preoperative ROM, and a greater decrease in postoperative cervical lordosis were identified as risk factors for pseudarthrosis after multiple PCF.
Subsea Application of Viscosity Reducers Improves Operational Efficiencies and Increases Oil Production
Authors: Braakhuis G. , Caird S. , Kopowicz M.
Published: October 2024

Crude oil emulsions can be challenging to produce due to high fluid viscosities causing increased frictional forces in the tubing and flowlines, resulting in slug flow, production deferment and poor oil / water separation. Through the application of an Emulsion Viscosity Reducer (EVR) chemical some of these challenges can be overcome, while additional benefits can be achieved. This paper will present examples of EVR applications offshore in the North Sea that enabled increased oil production. The Emulsion Viscosity Reducer was injected via subsea umbilical to a flowline or through the gas lift system into the production tubing downhole. Various parameters such as produced fluid viscosity, bottom hole pressure, well and flowline slugging, and oil production were monitored. The chemical injection rate was optimised based on the monitored parameters. Trials were performed with the chemical injection stopped and re-started so that the effect of the emulsion viscosity reducer is confirmed against numerous baseline data sets. In one of the examples, the performance of a newly developed combination EVR-wax inhibitor product is detailed. Injection of EVR resulted in reduced viscosity fluids being produced and as such various positive effects were observed including reduced bottom hole pressure, mitigation of slugging, choke opening being enabled, increased oil production, improved oil / water separation in the process and reduced flaring. Significant increases in oil production were observed. In the example where the combination EVR wax inhibitor was injected, evidence of improved wax inhibition efficiency compared to the wax inhibitor chemistry alone was observed. The combination of a slight increase in fluids temperature due to shorter transit time as a result of increased and more consistent flow, and the surface-active nature of the EVR chemistry led to the observed improvement. Through this work production parameters which indicate if a well or flowline may be suitable for an EVR application were identified and the benefits of such an application may be quantified. We also introduce the concept of a tool which can estimate the potential uplift in oil production given specific well and production parameters, resulting in methods for other oil and gas production facilities to re-produce similar operations and increase production efficiency.
Early Stuck Pipe Detection Based on Time Series Analysis
Authors: SHI Xiaoyan , Ji Yong , Cui Meng , Wu Dong , Guo Weihong , Jing Lingzhi , Tian Yumeng , Yang Xinyi
Published: October 2024

Recognizing stuck pipe signs in an earlier time and adopting appropriate action can greatly reduce non-productive time during drilling and improve drilling safety. The purpose of this paper is to propose a time series analysis approach and build a reliable and easy-to-use tool to automatically detect stuck pipe accurately and early. Based on the in-depth theoretical analysis and historical stuck pipe data analysis, main early stuck pipe indicators during different drill operations are identified. More than ten time series analysis algorithms and machine learning algorithms are utilized to capture subtle change trends and local change patterns in noisy real-time measured surface data during drilling, and a self-adaptive threshold value determination method is proposed to improve the detection accuracy under different data measurement quality. Moreover, correlation analyses are conducted on the multidimensional time series based on the studied rules and priori knowledge to reduce the false alarms caused by curtain drilling operations. An early stuck pipe detection software tool is built. The tool consumes both real-time and archived drilling data, and provides alarms when stuck pipe indicators are detected. 19 wells’ historical drill data are fed to the tool for algorithm verification, the results show that the tool can automatically detect all 22 stuck pipe incidents in the data set, among which, 5 incidents were detected 2 hours before the field recorded event time, 2 incidents were detected more than 1 hour before the field recorded time, 8 incidents were detected 3-42 minutes before, 4 incidents were detected about the same time as the field recorded time, and 3 incidents were detected less than 2 minutes later than the field recorded time. The average false alarm rate is about once per 48 hours operation time. The tool was also connected to the real-time drilling data in remote drilling operation support center. During the trail, two early stuck pipe signs are captured accurately. The computation time for each real-time data point is less than 0.5 second, which meets the real-time requirement. According to the demonstrated stuck pipe detection rate and false alarm rate, the tool is promising and beneficial for detecting stuck pipe in early time automatically, which improves the drilling safety and reduce non-productive time.
Increasing Natural Dump-Flood Rate from High Pressure Aquifer to Low-Pressure Reservoir to Boost Oil Production Through Economical Shockwave Stimulation Technique
Authors: Zamanuri A. , Chin H. V. , Tran T. V. , Mohamad A. S. Noor , Naziri A. F. Ahmad , Subari I.
Published: October 2024

In a natural dump-flood well that has been progressing for approximately six years, observations were made that only one of the two intended low-pressure oil reservoirs – B2 and B3 reservoirs – is receiving water from the high-pressure aquifer in the same source well. The B2 reservoir which has benefited from the natural dump-flood has seen increasing reservoir pressure over the years and the off-take well commenced production two years after the commencement of the dump-flood. On the other hand, the pressure in the B3 reservoir remained stagnant and the off-take well for this reservoir remained idle throughout the six years of dump-flooding, indicating that crossflow from the dump-flood did not go into the B3 reservoir. Due to these observations, well stimulation through wireline-conveyed shockwave pulsing was selected to stimulate the near wellbore area of the injecting and receiving reservoir to address the issue.

Identifying the root cause of the formation damage in the B3 reservoir is crucial in selecting the ideal method for well stimulation. Based on the available mineralogy test of the field, the formation damage was caused by fines migration due to the substantial amount of migrating fines including Plagioclase, Feldspars, Illites and Kaolinites which makes shockwave pulsing the optimal stimulation method to rectify the issue. During the execution, the shockwave pulsing tool was run inside the well with wireline and placed immediately across the perforation intervals of both the injecting and receiving reservoir. The stimulation was performed with an average pulse density of 60 pulses/foot throughout the entire perforations to remove the near wellbore formation damage.

Three years after the well stimulation was executed, the pressure in the B3 reservoir was observed to increase from 650 psi to approximately 930 psi – a positive indication of successful dump-flood into the B3 reservoir. A further increase of the reservoir pressure was observed to 1050 psi one year later and the off-take well was finally brought back to production with an initial production rate of 500 bopd after being idle for more than 10 years. Several months later, the oil production rate keeps on increasing up to 850 bopd likely attributed to increasing reservoir pressure in the B3 reservoir as a result of the ongoing dump-flood from the high-pressure aquifer.

This initiative has succeeded in re-activating an idle well through cost-effective well stimulation and secondary recovery technique as opposed to the more expensive option of acid stimulation and conventional water injection. This paper seeks to present the overall dump-flood mechanism, well stimulation technique selection criteria and detailed operation of the well intervention activity including lessons learnt and improvement plans which would be valuable for similar operations in the future.
The Geothermal Energy Potential of the West Onshore Canning Basin, Western Australia
Authors: Wilson K. , van Hattum J. L.
Published: October 2024

The energy transition and advances in geothermal energy exploitation have revitalized interest in geothermal power in Australia, evidenced by a rebound in geothermal energy exploration acreage releases by several states and subsequent industry uptake. The natural, regenerative heat of the earth is a practically limitless pool of energy without the intermittency of other sources of renewable energy. Advancements in geothermal technology are dismantling the geological barriers that have limited its adoption. These innovations, primarily derived from unconventional petroleum drilling and completion techniques, have directed geothermal investigation towards Enhanced Geothermal Systems (EGS) in hot dry rocks (HDR), particularly crystalline basements.

In 2023, the Department of Energy, Mines, Industry Regulation and Safety (DEMIRS) awarded six geothermal exploration permits (GEP), with two of these located in the northwest of Western Australia within the onshore Canning Basin. The onshore Canning Basin consists of Ordovician to Cretaceous sediments up to 18 km thick overlain on a Proterozoic-Archean basement of varying composition. The Area of Investigation (AOI) for this study encompasses over 66 000 km2 of the west onshore Canning Basin; namely the Broome Platform and Willara Sub-basin in addition to the Munro Arch and Mowla Terrace.

The USGS's volumetric heat-in-place (HIP) calculation methodology was utilized to quantify the geothermal resource size of the west onshore Canning Basin using a fit-for-purpose basement model from existing sparse geological and geophysical datasets. The P90 HIP across the AOI was determined to be 5.5x107 PJ with an average of 830 PJ/km2. The region of most prospective basement HIP was found to be the southwestern edge of the Willara Sub-basin with the majority of HIP highs measured across the AOI primarily driven by shallow basement, at depths less than 500 m. Volumetric estimations of energy recovery are premature in this study due to the sparse datasets available in the calculation. To determine a recoverable power quantity further studies and exploration well drilling with flow testing needs to be undertaken.