bluuebunny/crossref_metadata_2025 huggingface dataset:
The effect of in-bed cycling combined with high flow nasal cannula treatment on arterial oxygen and respiratory dynamics in patients with severe respiratory failure: A retrospective study
Authors: Wang Xiaoyan , Zhang Jiapo , Jiang Yang , Liu Jie , Huo Deyuan
Published: August 2024

Objective: To assess the effects of in-bed cycling (IBC) combined with high flow nasal cannula (HFNC) on arterial oxygen and respiratory dynamics in patients with severe respiratory failure (RF).
Methods: We retrospectively collected clinical data of 103 patients with severe RF, admitted to the intensive care unit (ICU) of The Second Affiliated Hospital of Harbin Medical University from March 2021 to March 2023. Among them, 50 patients had HFNC alone (control group), and 53 patients did IBC in addition to HFNC (observation group). We compared arterial oxygen index, lung function, respiratory dynamics, and clinical efficacy between the two groups.
Results: There was no significant difference in the basic data between the two groups (P>0.05). After the treatment, the improvement of the partial pressure of oxygen (PaO2), PaO2/fraction of inspired oxygen (FiO2), arterial oxygen saturation (SaO2), and oxygen delivery (DO2) in the observation group was significantly better than that in the control group (P<0.05). After the treatment, the improvement of lung function in the observation group was better than that in the control group (P<0.05). After the treatment, the end expiratory pulmonary pressure (Ptp-ee) and driving pressure (△Ptp) levels in the observation group were significantly higher, and the duration of ICU hospitalization and the incidence of ICU-acquired weakness(ICU-AW) were significantly lower than those in the control group (P<0.05).
Conclusions: IBC combined with HFNC can significantly improve arterial oxygen levels, lung function, and respiratory dynamics in patients with severe RF. IBC in combination with HFNC is associated with shorter stay time in the ICU, reduced of ICU-acquired weakness, and better physical recovery of patients.
doi: https://doi.org/10.12669/pjms.40.8.9471
How to cite this: Wang X, Zhang J, Jiang Y, Liu J, Huo D. The effect of in-bed cycling combined with high flow nasal cannula treatment on arterial oxygen and respiratory dynamics in patients with severe respiratory failure: A retrospective study. Pak J Med Sci. 2024;40(8):---------.  doi: https://doi.org/10.12669/pjms.40.8.9471
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Nabycie przez cudzoziemca samodzielnego lokalu użytkowego o przeznaczeniu garażowym – wybrane zagadnienia
Authors: Oślizło-Doskocz Natalia
Published: August 2024

Ustawa o nabywaniu nieruchomości przez cudzoziemców określa warunki, jakie muszą zostać spełnione, aby cudzoziemiec mógł w Polce zakupić nieruchomość. W powyższym artykule zaprezentowane zostały wybrane zagadnienia dotyczące nabywania przez cudzoziemców garaży.
Targeted Advertising as Implicit Recommendation: Strategic Mistargeting and Personal Data Opt-out
Authors: Ning Z. Eddie , Shin Jiwoong , Yu Jungju
Published: August 2024

The paper investigates a firm’s optimal targeted advertising strategy when the incentives of the firm and those of the consumers are misaligned and how these considerations affect the consumers’ choices for their data privacy.
‘Follow the child’
Authors: Cummins Sarah
Published: August 2024

In this final article in the series all about Maria Montessori, Sarah Cummins, senior lecturer in the School of Educaiton at Leeds Trinity University, outlines more about how practitioners can put Montessori's key principles and theories into practice in their settings.
Student Q&A: ‘Keep reflecting’
Authors: O’Neill Rosie
Published: August 2024

This month we caught up with Rosie O’Neill, who finished her degree in Early Childhood Studies with Psychology at the University of Portsmouth in July. She shares more about her experiences and the importance of reflecting on and improving your practice
Settling into community
Authors: Green Jennifer
Published: August 2024

As more paramedics transition across various roles, Band 6 paramedic, Jennifer Green shares her journey in a new monthly column in 2024, as she makes her way from the ambulance setting into general practice
Sensitivity enhancement of an all-solid FPE sensor via a programmable Vernier effect
Authors: Cheung Yang , Jing Zhenguo , Cao Pengdong , Jiang Feng , Zhou Da-Peng , Peng Wei
Published: August 2024

All-solid, open-cavity fiber optic Fabry–Perot etalon (FPE) sensors possess a wide static pressure detection range, yet their low sensitivity significantly restricts their application. This study proposes a programmable Vernier effect to improve the gas pressure sensitivity of FPE sensors substantially. By effectively modulating the emission spectrum of a widely tunable laser using a variable optical attenuator (VOA), the emission spectrum at different modulation lengths is expected to produce an optical beating in conjunction with the transmission spectrum of the FPE sensor, thereby realizing the Vernier effect. Experimental results indicate that by utilizing the proposed programmable Vernier effect, the pressure sensitivity of the FPE sensor has increased to −612.21 pm/kPa, demonstrating an amplification in sensitivity of approximately −153 times, consistent with the theoretical results. Owing to the programmable Vernier effect, which flexibly enhances the sensitivity of the FPE sensor, this sensor demonstrates considerable potential for gas pressure monitoring under various extreme conditions.
Epidemiology and molecular detection of human adenovirus and non-polio enterovirus in fecal samples of children with acute gastroenteritis: A five-year surveillance in northern Brazil
Authors: Alves Jainara Cristina dos Santos , Teixeira Dielle Monteiro , Siqueira Jones Anderson Monteiro , Deus Danielle Rodrigues de , Oliveira Darleise de Souza , Ferreira James Lima , Lobo Patricia dos Santos , Soares Luana da Silva , Tavares Fernando Neto , Gabbay Yvone Benchimol
Published: August 2024

Acute gastroenteritis (AGE) is a common pediatric infection that remains a significant cause of childhood morbidity and mortality worldwide, especially in low-income regions. Thus, the objective of this study was to detect human adenovirus (HAdV) and non-polio enterovirus (NPEV) in fecal samples from the Gastroenteritis Surveillance Network, and to identify circulating strains by nucleotide sequencing. A total of 801 fecal samples were tested using qPCR/RT-qPCR, and 657 (82.0%) were inoculated into HEp-2C and RD cell lines. The HAdV and NPEV positivity rates obtained using qPCR/RT-qPCR were 31.7% (254/801) and 10.5% (84/801), respectively, with 5.4% (43/801) co-detection. Cytopathic effect was observed in 9.6% (63/657) of patients, 2.7% (18/657) associated with HAdV, and 6.2% (41/657) associated with NPEV after testing by ICC-PCR. A comparison of the two methodologies demonstrated an agreement of 93.5% for EVNP and 64.4% for HAdV. These two viruses were detected throughout the study period, with HAdV positivity rates ranging from 41% in Amapá to 18% in Pará. The NEPV varied from 18% in Pará/Rondônia to 3% in Acre. The most affected age group was over 60 months for both HAdV and NPEV. Samples previously positive for rotavirus and norovirus, which did not show a major difference in the presence or absence of diarrhea, fever, and vomiting, were excluded from the clinical analyses of these two viruses. These viruses circulated over five years, with a few months of absence, mainly during the months corresponding to the waves of SARS-CoV-2 infection in Brazil. Five HAdV species were identified (A, B, C, D, and F), with a greater predominance of HAdV-F41 (56.5%) followed by HAdV-C (15.2%). Three NPEV species (A, B, and C) were detected, with serotypes E14 (19.3%) and CVA-24 (16.1%) being the most prevalent. The present study revealed a high diversity of NPEV and HAdV types circulating in children with AGE symptoms in the northern region of Brazil.
Transportation infrastructure and economic growth: Evidence from "new nighttime light data" in the Yangtze River Delta
Authors: Huang Chunfang , Zhu Hai , Su Meng
Published: August 2024

The enhancement and improvement of China’s high-speed rail network plays a crucial role in promoting sustainable economic growth in the region. By utilizing "new nighttime light data" in China’s Yangtze River Delta from 2003 to 2018, this paper investigates the impact of HSR on economic growth using a multiperiod difference-in-differences (DID) model. The operations of high-speed rail have a significant and positive impact on economic growth, which often becomes more apparent with a certain time delay. The operations of high-speed rail have a significant positive impact on the development of large, mega, and super-cities, with this impact becoming more pronounced as the size of the city increases. Furthermore, high-speed rail operations have a significant influence on the economic growth of cities that largely rely on secondary and tertiary industries, in contrast to the primary industry. The promotion of economic growth by high-speed rail is primarily achieved through three transmission channels: low carbon emissions, labor force agglomeration, and innovation. Over time, high-speed rail will progressively reduce economic disparities between regions and facilitate a trend towards regional economic coordination or convergence. This study makes a valuable contribution to the exploration of pathways towards achieving economic growth.
Seroprevalence of hepatitis B and C viruses and some possible associated factors among cancer patients at the Oncology Treatment Center, Gondar, Northwest Ethiopia: A cross-sectional study
Authors: Atanaw Tadesse , Girmay Getu , Zemene Aragaw , Assefa Muluneh , Eshetie Tewodros , Bewket Gezahegn , Alemiye Fikadu , Belete Debaka , Birhane Nega
Published: August 2024

Background

Cancer patients are prone to infections such as hepatitis B virus (HBV) and hepatitis C virus (HCV), which pose a major public health challenge, especially in developing countries. However, little is known about the magnitude of these infections among cancer patients in Ethiopia. Thus, this study determined the prevalence of HBV and HCV in cancer patients at the Oncology Treatment Center, Gondar, Northwest Ethiopia.

Materials and methods

An institutional-based cross-sectional study was conducted on 115 cancer patients from 15 April to 22 July 2023 at the Oncology Treatment Center, Gondar, Northwest Ethiopia. Sociodemographic, clinical, and other relevant data were collected using a pretested structured questionnaire. Five milliliters of venous blood were collected using a vacutainer tube, serum was harvested and tested for HBV and HCV using a one-step HBsAg and anti-HCV test strip with further confirmation through an ELISA test kit. Data were analyzed using SPSS version 20 and Fisher exact test was used to determine the association between HBV/HCV infection and associated factors.

Results

Out of 115 cancer patients, the majority (62.6%) were females. The median age was 50 (IQR; 40–56) years. The overall prevalence of HBV and HCV infections was 4.3% (95% CI; 0.6–8%) and 6.1% (95% CI; 1.7–10.5%), respectively. Sex was significantly associated with the prevalence of HCV (p = 0.011) with higher anti-HCV positivity in males (14%) than in females (1.4%).

Conclusions

In this study, the prevalence of HCV was higher and the HBV prevalence was intermediate in cancer patients. To reduce the burden of HBV and HCV infections, it is crucial to provide access to HBV and HCV screening services, strengthen vaccination, and improve prompt treatment in cancer patients.
En busca del tiempo y del espacio: ucronías y utopías desde la Antigüedad hasta la actualidad
Authors: Puertas Alberto J. Quiroga , Jiménez-Higueras Ángeles
Published: August 2024

Esta propuesta aborda cómo las categorías “tiempo” y “espacio”, entendidas en su dimensión física, han sido manipuladas para crear otras realidades, otros mundos en los que distintos autores y artistas han proyectado sus ideologías, miedos y esperanzas desde el mundo antiguo hasta nuestros días. Al amparo de la cada vez más recurrente pregunta “qué hubiera pasado si…”, este proyecto persigue sondear los mecanismos literarios y los mundos paralelos creados cuando nos imaginamos otros mundos así como unos futuros y unos pasados alternativos.
Interstate solidarity and support
Authors: Balogh Péter
Published: August 2024

The paper aims to contribute to the question of the possible role of social capital and trust in the international system by examining the support provided to Ukraine in the first year of the Russian-Ukrainian conflict, from 24 February 2022 to 24 February 2023. In a secondary data analysis based on publicly available sources, the composition and dynamics of support will be investigated in different dimensions. The results imply that – on global context – the group of countries providing support to Ukraine is narrow, with quite significant disparities between them. In addition to the dominance of the United States of America, the involvement of the United Kingdom, Germany and Japan proves to be remarkable, and the significant aggregate share of NATO member states might be highlighted, which may also draw attention to possible specific mechanisms of social capital.
Understanding Inherited Bleeding Disorders: Genetic Mutations in Blood Coagulation Factors and Regulatory Proteins
Authors: Baniamer Ansam Zakaria , Hamdan Aya Mohannad , AlGhzawi Mohammad Raed , Alfaqeh Mohammad Tareq , Yaseen Sadeen Yaser , Alshtawi Shama Mohammad , Alomush Hala Yasin , Olimat Rand Mahdi
Published: August 2024

Hereditary thrombotic diseases, or inherited bleeding disorders, are a group of genetic conditions that disrupt normal blood coagulation. These diseases result from mutations in genes encoding blood coagulation factors or other regulatory proteins, impairing the body's ability to regulate bleeding and clotting.

The most common inherited clotting disorders are hemophilia A and B, which are associated with deficiencies in clotting factors VIII and IX, respectively. Von Willebrand disease (VWD) is another prevalent disorder characterized by a deficiency or dysfunction of the Von Willebrand factor, a protein essential for coagulation. Additionally, the Factor V Leiden mutation is linked to an increased risk of blood clots.

The prevalence of inherited coagulation disorders varies significantly by region and subpopulation. It is estimated that 5,000 to 10,000 male newborns are born with hemophilia A or B each year. Von Willebrand disease is much more common, affecting about 1% of the global population. The Factor V Leiden mutation is found in significant percentages of certain populations, with 3–8% of Caucasians being carriers.

While antithrombin deficiency is more common in some areas, the incidence of other inherited clotting disorders, such as Factor XI, protein C and S deficiencies, and VWD, varies widely worldwide.

This study discusses the incidence of inherited clotting disorders and their impact on affected individuals and their families. It also covers new advancements in disease management, alternative therapy approaches, and contemporary diagnostic techniques, aiming to improve diagnoses, treatments, and outcomes for patients with hereditary clotting disorders.
Phenomenological engagement as pedagogical impetus in career counselling education
Authors: Conradie Karlien
Published: August 2024

This article aims to present the author’s understanding of how a phenomenologically concerned pedagogy can offer an antidote to the influence that a post-industrial consumerist culture has on career counselling education. In the age of mediatisation, surges of endless commercialisation and consumption has evolved in a crisis of relationality, characterised by ecological fragmentation and disconnectedness. The present article explains how an overly utilitarian mindset reinforces an instrumentalist approach to career counselling, inhibiting student educational psychologists’ capacity for being conscious of the embodied lifeworld situation of a person engaging in career counselling. The embodied lifeworld situation refers to an ecologically integrated person reality, intricately anchored in time, space, and historicity. A pedagogical approach is needed that forefronts phenomenological engagement – relational being and knowing - as a way of conserving students’ ability for embodied consciousness.
The Decolonization of Knowledge: Radical Ideas and the Shaping of Institutions in South Africa and Beyond.
Authors: Blackie Mags
Published: August 2024

Jansen, J.D. and Walters, C.A. 2022. The Decolonization of Knowledge: Radical Ideas and the Shaping of Institutions in South Africa and Beyond. Cambridge: Cambridge University Press.
Transformative Nature of Graduate Education
Authors: Contreras Elizabeth , Bedford Laurie
Published: August 2024

Doctoral education is a complex and sometimes intimidating process. However, it is also transformative. Transformational Learning Theory, developed by Mezirow in 1991, helps to explain how graduate education is transformative through embracing education in a cognizant and reflective way. By helping students connect with the school community, their professors, and their own metacognitive process, Transformational Learning Theory helps explain the evolution students go through as they progress through doctoral programs. Written as a personal reflection on the transformative experience of doctoral education, this article explores Transformational Learning Theory in a real-world, practical manner, providing helpful strategies to apply the Transformational Learning Theory to the doctoral education experience, helping doctoral students embrace their own transformation.
Open Call for Papers - GJTE
Authors: GJTE Editors
Published: August 2024

GJTE maintains an open Call for Papers, and this page provides guidelines for authors interested in submitting a manuscript.
Cardiac Mass in a 78-Year-Old Patient With a History of Cancer: Diagnostic and Treatment Challenges
Authors: Zhao Bihong , Zaqqa Ayah , McDonald Michelle M. , de Armas Ismael A. Salas , Gregoric Igor D. , Buja L. Maximilian
Published: August 2024

Primary cardiac angiosarcoma is a rare, aggressive malignancy that commonly metastasizes to various organs. The presenting symptoms are typically nonspecific, so a comprehensive examination is required to confirm the diagnosis promptly. This case report describes the presentation of an older patient with a history of neoplasms. Echocardiography and biopsy were performed, but despite surgical intervention to resect a large right atrial mass, the patient died. A final diagnosis of primary angiosarcoma was made based on the resected specimen.
Surgical treatment of kyphosis due to avascular osteonecrosis of the vertebral bodies
Authors: Borzykh K. O. , Rerikh V. V. , Sinyavin V. D.
Published: August 2024

Objective. To analyze the results of surgical treatment of patients with fixed spinal deformity due to osteonecrosis of the vertebral bodies of the thoracic and lumbar spine.

Material and Methods. The data obtained from the case histories of 40 patients operated on for kyphosis due to osteonecrosis of the vertebral bodies were studied. The patients underwent staged surgical interventions in one surgical session. Demographic data and radiological results of surgical treatment before surgery, after surgery and up to 1 year after surgery were assessed.

Results. As a result of surgical interventions, local kyphosis was corrected on average from 30° to -0.25°. After correction of kyphosis, statistically significant changes in the sagittal curves of the spine were revealed: an increase in thoracic kyphosis and a decrease in lumbar lordosis. There was an improvement in sagittal balance indicators in the form of a regression in the number of imbalanced patients – 17 (42.5 %) patients improved balance indicators. During the follow-up period, a statistically significant improvement in VAS and ODI scores was noted. Intra- and postoperative complications accounted for 35 %, and 8 (20 %) mechanical complications were identified during dynamic observation. Predictors of mechanical complications were the presence of imbalance: 2 and 3 points according to the balance modifier of the Formica classification and the GT index (global angle) > 7°, and insufficient correction of kyphosis (LK postOp > 4°), T-score index < -3.35.

Conclusion. Simultaneous staged surgical interventions allow for complete correction of the deformity, restoration of the sagittal profile, thereby improvement of the patient’s quality of life. To reduce mechanical complications when planning and performing surgical intervention, it is necessary to take into account the identified predictors.
Evaluation of the effectiveness of surgical treatment of tethered spinal cord syndrome of secondary origin in spina bifida: a systematic review
Authors: Ryabykh S. O. , Kalashnikov A. A. , Lysachev D. A. , Klimov V. S. , Gubin A. V. , Dyachkov K. A. , Khuzhanazarov I. E. , Eshkulov D. I.
Published: August 2024

Objective. To present a literature review assessing the effectiveness of surgical treatment methods for tethered spinal cord syndrome of  secondary origin in spina bifida.

Material and Methods. The Pubmed, EMBASE, eLibrary, and Cochrane Library databases were searched for prospective cohort clinical studies published from 2009 to 2024 and evaluating the effectiveness of methods for correcting tethered spinal cord syndrome in spina bifida. The study was carried out in accordance with the guidelines for Preferred Reporting Items for writing Systematic Reviews and Meta-Analyses (PRISMA).

Results. During this period, 20 articles were published assessing the effectiveness of surgical methods for correcting tethered spinal cord syndrome. Of these, 15 are pragmatic clinical trials and 5 are randomized clinical trials. The average level of evidence is III.

Conclusion. Currently, it can be stated that there is an intra-expert consensus regarding functional radiological criteria for tethered spinal cord syndrome of secondary origin in spina bifida. However, the issue of the effectiveness of surgical intervention directly depends on the availability of objective methods for clinical assessment of the severity of functional deficit and the reversibility of morphofunctional changes in the nervous tissue. Despite the variety of clinical scales and questionnaires, there is no unified assessment system for neurological, urological and orthopedic deficits in patients with tethered spinal cord syndrome. In this context, functional MRI (spinal MR tractography) can be considered a promising method for objectifying the pathological process. However, the phenomena revealed during the examination are not fully studied and require further research.
Results of surgical treatment of early-onset scoliosis using growth-friendly implants: analysis of a 10-year monocentric cohort
Authors: Molotkov Yu. V. , Ryabykh S. O. , Evsyukov A. V. , Savin D. M. , Filatov E. Yu.
Published: August 2024

Objective. To evaluate early and medium-term results of surgical treatment of early-onset scoliosis using the principle of growth-friendly systems.

Material and Methods. A retrospective analysis of the medical records of 54 patients treated using surgical distractible metal implants was carried out. Patients were divided into 4 etiological groups: congenital (n = 17), systemic (n = 12), idiopathic (n = 16) and neurogenic scoliosis (9). The boy/girl ratio was 11/43. The average age at which patients started treatment was 9.6 years, and at the end of treatment – 13.2 years.

Results. Radiometric parameters were assessed during and after completion of treatment. The Cobb angle of the main curve of deformity before treatment averaged 56.1°, after the primary operation – 31.8°, and after completion of treatment – 23.2°. Correction of the main deformity curve for the entire period of multi-stage surgical treatment was 57.8 %. The highest initial magnitude of deformity was noted in the group of neuromuscular scoliosis (67.6°), and the lowest in the group of congenital pathology (50.4°). In the groups of systemic and idiopathic scoliosis, the preoperative values were very close: 53.4° for systemic scoliosis and 57.6° for idiopathic scoliosis. According to the results of staged treatment in the neuromuscular scoliosis group, the residual curvature of the main curve was the lowest, and the percentage of its correction was the highest – 18.9° and 73.6 %, respectively, versus 24.5° and 49.7 % in the congenital scoliosis group. The effectiveness of treatment with an assessment of the percentage of correction after final instrumentation in groups of idiopathic and systemic scoliosis was close: 23,0° and 62.3 %, and 28.5° and 51.5 %, respectively. Identical average values of the main curve angle after final instrumentation were noted in all four etiological groups (on average, 23.2°). Changes in thoracic kyphosis and lumbar lordosis were insignificant. During the treatment, 22 unplanned surgical interventions were performed in 15 patients.

Conclusion. This study revealed a number of key points that in the future may help in the formation of clearer algorithms of selecting the most optimal technique: neurogenic scoliosis is most successfully corrected by growing systems, and congenital scoliosis shows less pronounced correction of deformity and a greater relative number of complications per patient with a single use of growing systems, which requires caution during staged surgical treatment.
Analisis Pemetaan Potensi dan Realisasi Energi Baru Terbarukan (EBT) dengan Pemodelan Determinan Konsumsi dan Metode Grouping Analysis EBT di Indonesia
Authors: Sianipar Reinhard Jordan , Januar Ralditiya Rifki , Silalahi Stevay David Christian
Published: August 2024

Indonesia merupakan negara yang menyimpan potensi Energi Baru Terbarukan (EBT) yang sangat besar, terutama dalam rangka memenuhi kebutuhan energi nasional. Akan tetapi, pemanfaatan dari EBT di Indonesia masih tergolong sangat kecil apabila dibandingkan dengan jenis energi lain. Sumber energi utama Indonesia selama 10 tahun terakhir didominasi oleh sumber energi fosil dengan persentase sekitar 92%, sedangkan sisanya sebesar 8% baru dimanfaatkan dari EBT. Tujuan penelitian ini adalah untuk melakukan pemetaan realisasi dan potensi dari sumber EBT di setiap daerah di Indonesia, serta melakukan pemodelan terhadap determinan dalam penggunaan EBT di Indonesia. Analisis ini menggunakan metode pemetaan Grouping Analysis untuk melihat pengelompokan realisasi dan potensi EBT serta metode VAR dalam menganalisis hubungan antara persentase konsumsi EBT di Indonesia terhadap produksi minyak mentah serta rata-rata penggunaan listrik per kapita. Hasil analisis menunjukkan persebaran dari potensi EBT yang sangat besar di Indonesia belum sejalan dengan realisasi dari pemanfaatannya. Hasil ini juga menunjukkan adanya pengaruh negatif dari produksi minyak bumi, baik secara jangka panjang, maupun secara jangka pendek terhadap konsumsi EBT. Sedangkan, penggunaan listrik per kapita menunjukkan adanya pengaruh positif, baik secara jangka panjang, maupun secara jangka pendek terhadap konsumsi EBT di Indonesia. Hasil analisis ini diharapkan menjadi acuan dalam pemanfaatan EBT dalam lingkup spasial, terutama yang merujuk pada kebijakan Rencana Umum Energi Daerah (RUED), serta melihat faktor yang mempengaruhi konsumsi EBT di Indonesia.      Kata Kunci : Energi Baru Terbarukan, Grouping Analysis, VAR
Modification Reactor Biogas With Isolation Water And Scrubber To Increase Biomethane Production
Authors: Afifah Meita , Prihatini Chindy Aulia , Syamsuri Iyappateya Gelegar Dirgantara , Didik Nurjan , Elsyana Vida , Ramandani Adityas Agung
Published: August 2024

Biogas is alternative energy produced through the process of fermenting organic materials in anaerobic conditions to produce methane gas (CH4). The quality of the biogas depends on the concentration of the CH4, the higher the content, the better the quality. One way to improve the quality of biogas so that the content of methane gases in biogases increases and can reduce gases such as CO2, H2S, and other gases is by using a scrubber that contains compound fertilizer as its purification. The objective of this research is to reuse organic waste into useful biogas as alternative energy, and to apply water as a methane gas isolator so as not to be wasted on batch and scrubber reactor processes for the purification of H2S content. The old test results of the biogas flame and the color test of the flame on the 20th and 28th days could not be done, because of the little gas formed to the pressure of the gas generated 0 atm. On the 40th day where the gas pressure generated 5 atm, but the results of the biogas fire test did not come out because the gas produced was still small so the flow of gas to the stove did not reach. Biogas production needs to be increased so that the long-standing test of flame and flame color of biogas can be done well. This research also was explored step by step to producing biogas using organic waste. In addition, consideration should be given to the use of other methods to increase gas production so that these alternative energy applications can run optimally.
Peningkatan Kecepatan Start up dan Kemurnian Metana Dalam Pengolahan Limbah Organik Cair Menggunakan Rraktor Fixed Terimobilisasi Karbon Aktif
Authors: Prastyo Elli , Asminah Ninin , Mulyani Yully
Published: August 2024

Biofuel generasi kedua masih menjadi pilihan dalam mengembangkan energi baru terbarukan dan mampu mengatasi permasalahan lingkungan dari kegiatan industri. Biofuel yang diproduksi oleh reactor anaerobic termodifikasi media immobilisasi mampu menghasilkan biogas dengan tingkat produksi dan kemurnian metana yang tinggi. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penggunaan media immobilisasi berupa karbon aktif dalam menghasilkan biogas dari limbah cair industry tahu. Variabel tetap dalam penelitian ini adalah penggunaan media immobilisasi karbon aktif 20 gr, 30 gr, dan 50 gr. Analisis berupa COD, VFA, volume biogas, dan kandungan metana diujikan untuk mengetahui kualitas dan kuantitas dari produk yang dihasilkan. Penelitian menggunakan reactor fixed dengan volume kerja 2 liter dengan perbandingan inoculum dan feed adalah 1:1. Hasil penelitian menunjukkan bahwa penguraian COD tertinggi sebesar 65,40% dengan penggunaan media immobilisasi 20 gr. Penggunaan karbon aktif 20 gr menghasilkan biogas tertinggi dengan puncak di hari ke-5 sebesar 65,449 mL dengan kemurnian metana sebesar 55,18% dengan waktu start up 10 hari. Kemurnian metana tertinggi dihasilkan oleh penggunaan media immobilisasi karobn aktif 50 gr sebesar 63,04% dengan laju produksi gas tertinggi terjadi hari ke-5 sebesar 36,1017 mL dengan waktu start up 8 hari
Literature Review: Kajian Potensi Energi Surya Alternatif Energi Listrik
Authors: Kharisma Amrul , Pinandita Satria , Jayanti Ari Endang
Published: August 2024

The demand for electrical energy is increasing every year and coal is also predicted to run out in the next few decades, so it must be replaced with new renewable energy such as solar energy sourced from solar radiation. This research aims to find out the potential of solar energy as an alternative source of electrical energy that can replace coal. This research is a type of qualitative research with a literature review method. Research data was collected from secondary sources from journals with the same research focus in 2019-2024 and the national energy balance analysis report (National Energy Council. The findings of the study show that national energy management has been regulated by the National Energy Council in the National Energy Policy (KEN) guidelines. Solar energy is encouraged by the government to be developed in Indonesia because of its huge potential considering that Indonesia is at the equator and has a tropical climate so that the intensity of solar radiation tends to be constant and comprehensive throughout Indonesia. The supply of solar energy from 2018-2022 continues to increase, this also encourages the development of solar power plants in Indonesia. In addition, the use of solar energy as a raw material for solar power plants also encourages battery investment, because sunlight has intermittent properties so that temporary storage such as batteries is needed to store energy before being converted into electrical energy. Thus, solar energy has a great opportunity to be developed in Indonesia considering the potential geographical location of the country and as a way to attract investors.
Synthesis and Characterization Membrane Nanofibers Cellulose Acetate-Zeolite for Metal Pb (II) Adsorption
Authors: Fulanjari Intan Dyah , Suryandari Ervin Tri , Kusuma Hamdan Hadi
Published: August 2024

Heavy metal waste, such as lead (Pb), released into the environment negatively affects ecosystems and human health due to its toxic properties. Consequently, it is imperative to develop methods to remove Pb from the environment. One widely used method is adsorption. Synthesizing adsorbents via electrospinning offers several advantages: simplicity, the ability to produce nano-sized fibers, lightness, chemical stability, and reusability. This research aims to determine the optimum conditions for synthesizing cellulose acetate (CA) nanofibers modified with zeolite (CA-Zeolite) by electrospinning to characterize them and evaluate their adsorption capacity. The research results showed that the optimum conditions for the synthesis of cellulose acetate nanofibers were a solution concentration of 14% (w/v), a voltage of 10.5 kV, a flow rate of 0.02 mL/hour, and a tip-to-collector distance of 10 cm. The FTIR spectrum of CA-Zeolite revealed a new peak in the 400-610 cm-1 wavelength range, indicative of O-Si-O bonds, characteristic of zeolite functional groups, confirming the successful incorporation of zeolite into the CA nanofibers. From the SEM data, it can be seen that the addition of 6% (w/w) zeolite reduced the average membrane fiber diameter from 662.4 nm to 353.1 nm. EDX results show the presence of Si and Al elements in the CA-Zeolite nanofiber membrane. Incorporating zeolite into CA nanofibers decreased the contact angle from 125.49° to 111.66°, enhancing hydrophilicity. The modified CA nanofibers with 6% (w/v) zeolite demonstrated an adsorption capacity of 1.595 mg/g.
La conquista del confort. Guía de Evaluación de Edificaciones Sostenibles (GEES)
Authors: Basto-Urbina Estefanny Pamela , Valverde-Farré Andrés
Published: August 2024

En un mundo crecientemente urbanizado, las intervenciones en la ciudad construida, desde la perspectiva de la rehabilitación urbana ecológica, son imprescindibles para responder a los retos que plantean la insostenibilidad de nuestro modelo socioeconómico y el cambio climático. Existe, sin embargo, un déficit de herramientas y metodologías de evaluación que faciliten y conduzcan a propuestas de intervención con una incidencia reconocible en la generación de alternativas menos insostenibles y mejor adaptadas a los escenarios que se avecinan. El cambio climático —como ya sucediera con el paradigma de la sostenibilidad— se ha ganado un puesto destacado en las agendas políticas. No obstante, demasiado a menudo este protagonismo no viene acompañado de una traducción eficaz en objetivos ni en la adopción de políticas y programas coherentes para alcanzarlos. Con el fin de responder a estos desafíos, la presente Guía de Evaluación de Edificios Sostenibles (GEES) plantea la primera fase de estudio en edificaciones de Vivienda de Interés Social (VIS), para proponer una serie de estrategias bioclimáticas y criterios de sostenibilidad dentro de los aspectos económicos, sociales y ambientales, como herramienta facilitadora para los diseñadores de proyectos arquitectónicos. Surge de un diálogo entre la Universidad Católica de Colombia y la Sociedad Colombiana de Arquitectos para el abordaje de una problemática relacionada no solo con la sostenibilidad, sino también con la seguridad jurídica de los arquitectos. En efecto, el rol de esta profesión se responsabiliza en el cumplimiento de mínimos de diseño de proyectos realmente sostenibles y, por supuesto, fieles a los conocimientos y las técnicas que hacen que un diseño posea atributos bioclimáticos. Arquitectos y sus equipos de trabajo encontrarán en este libro un verdadero instrumento de soporte a los procesos de diseño arquitectónico y proyecto urbano.
An Inverse Matrix Eigenvalue Problem for Constructing a Vibrating Rod
Authors: Mirzaei Hanif , Abbasnavaz Vahid , Ghanbari Kazem
Published: August 2024

The free longitudinal vibrations of a rod are described by a differential equation of the form

(
P

(
x
)

y
′
)

′

+
λ
P

(
x
)

y

(
x
)

=
0

{(P(x)y\prime)^{\prime}+\lambda P(x)y(x)=0}

, where

P
⁢

(
x
)

{P(x)}

is the cross section area at point x and λ is an eigenvalue parameter. In this paper, first we discretize this differential equation by using the finite difference method to obtain a matrix eigenvalue problem of the form

𝐀
⁢
Y

=

Λ
⁢
𝐁
⁢
Y

{\mathbf{A}Y=\Lambda\mathbf{B}Y}

, where

𝐀

{\mathbf{A}}

and

𝐁

{\mathbf{B}}

are Jacobi and diagonal matrices dependent to cross section

P
⁢

(
x
)

{P(x)}

, respectively. Then we estimate the eigenvalues of the rod equation by correcting the eigenvalues of the resulting matrix eigenvalue problem. We give a method based on a correction idea to construct the cross section

P
⁢

(
x
)

{P(x)}

by solving an inverse matrix eigenvalue problem. We give some numerical examples to illustrate the efficiency of the proposed method. The results show that the convergence order of the method is

O
⁢

(

h
2

)

{O(h^{2})}

.
Locally conjugate Galois sections
Authors: Porowski Wojciech
Published: August 2024

We consider sections of the étale homotopy exact sequence of a hyperbolic curve over a number field. We prove that two sections whose restrictions to decomposition groups are conjugate on a set of valuations of density one are globally conjugate, which establishes the local-global principle for the conjugacy classes of sections. In fact, we obtain this result as a corollary of a more general property concerning sections of the étale homotopy exact sequence, the finite covering property, which we prove as our main result.
Coupled and Coordinated Development of Economic Growth and Green Sustainability in a Manufacturing Enterprise under the Context of Dual Carbon Goals: Carbon Peaking and Carbon Neutrality
Authors: Shen Hongbing , Wang Zhe
Published: August 2024

The coupled and coordinated development between economic growth and the utilization of resources and the environment in manufacturing enterprises holds great significance in achieving high-quality, efficient, and low-energy consumption goals, and promoting the green and sustainable development of the manufacturing industry. This paper proposes an evaluation indicator system for a manufacturing enterprise under the context of carbon peak and carbon neutrality goals and establishes an evaluation model and comprehensive evaluation index. By organizing the relevant data on the economic development and ecological environment of this manufacturing enterprise from 2016 to 2022 and calculating the weighting coefficients, coupling model, and coupling degree model, the coupling development level of the manufacturing enterprise was evaluated. Empirical results demonstrate that the coupled development between economic growth and the ecological environment in the enterprise is in a stable rising state, transitioning from a moderately imbalanced state to a barely coordinated level. The enterprise should continue to research coupling points, explore coupling control directions, formulate targeted policies, and strive to reach a level of high-quality and coordinated development.
A new notion of convergence defined by weak Fibonacci lacunary statistical convergence in normed spaces
Authors: Ibrahim Ibrahim S. , Listán-García María C. , Colak Rifat
Published: August 2024

The applications of a Fibonacci sequence in mathematics extend far beyond their initial discovery and theoretical significance. The Fibonacci sequence proves to be a versatile tool with real-world implications and the practical utility of manifests in various fields, including optimization algorithms, computer science and finance. In this research paper, we introduce new versions of convergence and summability of sequences in normed spaces with the help of the Fibonacci sequence called weak Fibonacci φ-lacunary statistical convergence and weak Fibonacci φ-lacunary summability, where φ is a modulus function under certain conditions. Furthermore, we obtain some relations related to these concepts in normed spaces.
Symmetry-protected bound states in the continuum on an integrated photonic platform
Authors: Lu Qijing , Feng Ziyao , Sun Xiankai
Published: August 2024

Bound states in the continuum (BICs) have attracted much attention in the field of nanophotonics owing to their ability to trap photons without loss. Recently, a low-refractive-index (RI) waveguide loaded on a high-RI slab structure was demonstrated to support BICs. However, strict control of structural parameters is required due to the accidental nature of those BICs. Here, we propose a novel structure consisting of two low-RI vertically coupled waveguides loaded on a high-RI slab. This structure supports symmetry-protected BICs (SP-BICs), which do not require strict control of the geometric parameters. Such SP-BICs can also possess an infinitely high quality factor in resonant structures, which can be harnessed for ultranarrow-bandwidth spatial and spectral filters. Our work opens a new way of harnessing BICs on an integrated photonic platform for realizing nanophotonic circuits and devices.
Minimax interpolation of continuous time stochastic processes with periodically correlated increments observed with noise
Authors: Luz Maksym , Moklyachuk Mikhail
Published: August 2024

We deal with the problem of optimal estimation of linear functionals
constructed from the missed values of a continuous time stochastic process

ξ
⁢

(
t
)

{\xi(t)}

with periodically stationary increments at points

t
∈

[
0
;

(

N
+
1

)

⁢
T

]

t\in[0;(N+1)T]

based on observations of this process with periodically stationary noise. To solve the problem,
a sequence of stochastic functions

{

ξ
j

(
d
)

⁢

(
u
)

=

ξ
j

(
d
)

⁢

(

u
+

j
⁢
T

,
τ
)

,

u
∈

[
0
,
T
)

,

j
∈
ℤ

}

{\{\xi^{(d)}_{j}(u)=\xi^{(d)}_{j}(u+jT,\tau),u\in[0,T),\,j\in\mathbb{Z}\}}

is constructed. It forms an

L
2

⁢

(

[
0
,
T
)

;
H
)

{L_{2}([0,T);H)}

-valued
stationary increment sequence

{

ξ
j

(
d
)

,
j

∈
ℤ

}

{\{\xi^{(d)}_{j},j\in\mathbb{Z}\}}

or corresponding to it
an (infinite-dimensional) vector stationary increment sequence

{

ξ
→

j

(
d
)

=

(

ξ

k
⁢
j

(
d
)

,
k
=
1
,
2
,
…
)

⊤

,
j
∈
ℤ
}

{\{\vec{\xi}^{(d)}_{j}=(\xi^{(d)}_{kj},k=1,2,\dots)^{\top},\,j\in\mathbb{Z}\}}

.
In the case of a known spectral density, we obtain formulas for calculating values of the mean square errors and the spectral characteristics of the optimal estimates of the functionals.
Formulas determining the least favorable spectral densities and the minimax (robust) spectral
characteristics of the optimal linear estimates of functionals
are derived in the case where the sets of admissible spectral densities are given.
Apresentação
Authors: Degasperi Marisa Helena
Published: August 2024

PERSPECTIVAS INOVADORAS EM METODOS DE PESQUISA EM TRADUÇÃO
A memória dos Salões de Arte de Pelotas a partir do acervo audiovisual do CITES/UFPel
Authors: De Oliveira Aydê Andrade
Published: August 2024

A memória dos Salões de Arte de Pelotas a partir do acervo audiovisual do CITES/UFPel
Programa Regional de Educação Patrimonial da Fronteira Meridional do RS (Memoriar)
Authors: Cerqueira Fábio Vergara , Peixoto Luciana , Zorzi Mariciana
Published: August 2024

Este relatório apresenta a metodologia e os resultados finais obtidos a partir daatuação do Programa Regional de Educação Patrimonial – Memoriar nosmunicípios de Aceguá, Arroio Grande, Bagé, Capão do Leão, Cerrito e Jaguarão.Este programa se insere no convênio “Arqueologia e Educação Patrimonial naRegião Sul do Rio Grande do Sul”, firmado entre o Laboratório de Ensino ePesquisa em Antropologia e Arqueologia do Instituto de Ciências Humanas daUniversidade Federal de Pelotas (LEPAARQ/ICH/UFPel) e a Votorantim Celulosee Papel (VCP) em cumprimento a legislação de proteção e valorização dopatrimônio cultural.
A salvaguarda do patrimônio cultural imaterial na implementação da Convenção da UNESCO de 2003
Authors: Bortolotto Chiara
Published: August 2024

Reflexo da estabilização dos equilíbrios geopolíticos pós-coloniais no interior daUNESCO e do objetivo prioritário dessa organização, ou seja, a proteção dadiversidade cultural, a Convenção para a salvagurada do patrimônio culturalimaterial introduziu alterações importantes na concepção do patrimônio nãoapenas alargando seu domínio para a esfera das práticas vivas, mas tambématribuindo um novo papel aos atores sociais. A salvaguarda desse patrimônio é defato distinta da uma proteção conservadora de sua forma e prevê uma transmissãodinâmica fundada sobre a participação ativa de comunidades dos praticantes dasexpressões culturais consideradas. Esse artigo aborda algumas das dificuldades quesurgem na operacionalização dessa metodologia e as ambiguidades dainstituicionalização dessa nova categoria patrimonial. Os critérios de seleçãopatrimonial devem, a partir de então, refletir o valor social subjetivo que umelemento apresenta para um determinado grupo mais do que o interesseestabelecido sobre uma base técnica e científica da qual esse elemento seriaobjetivamente o portador. A realização concreta desse desenvolvimento relativistaé dificultada, no entanto, pelo papel do Estado que permanece incontornável naautorização patrimonial, bem como a estrutura dos sistemas institucionais,modelados na maior parte dos casos sobre uma abordagem puramente técnica ecientífica, distanciada do espírito da Convenção.
O excesso, a ilustração e o intempestivo. Resíduos patrimoniais ou as três figuras da evasão democrática
Authors: Barbe Noël
Published: August 2024

O excesso, a ilustração e o intempestivo. Resíduos patrimoniais ou as três figuras da evasão democrática
Relatório de atividades sobre acesso às fontes primárias de pesquisa em Buenos Aires, Argentina (2009) – arquivos nacionais e bibliotecas
Authors: Schvambach Janaina
Published: August 2024

O presente relatório visa descrever atividades desenvolvidas sobre a investigação e o acesso às fontes primárias de pesquisa na cidade de Buenos Aires – Argentina, realizada durante estágio acadêmico promovido pelo Mestrado em Memória Social e Patrimônio Cultural/ICH/UFPel, através do Programa de Cooperación Internacional Asociado para el Fortalecimiento de la Posgrado – Brasil/Argentina (CAFP/BA), no período de 01 de julho de 2009 a 6 de setembro de 2009. O trabalho de dissertação desenvolvido no Brasil estava inserido linha de pesquisa, Memória e Identidade e tinha como proposta de investigação a iconografia fotográfica nos periódicos ilustrados pelotenses, Jornal A Alvorada e Almanaque de Pelotas, durante o período de 1931 a 1935.
Memória de um espaço perdido: a história da sede da Escola de Belas Artes de Pelotas
Authors: Dias Katia Helena Rodrigues , Michelon Francisca Ferreira
Published: August 2024

Memória de um espaço perdido: a história da sede da Escola de Belas Artes de Pelotas