bluuebunny/crossref_metadata_2025 huggingface dataset:
The Difference Splitting Scheme for n-Dimensional Hyperbolic Systems
Authors: R. D. Aloev , Z. Eshkuvatov , M. U. Khudoyberganov , D. E. Nematova
Published: May 2022

In this paper, we propose the difference splitting scheme for a mixed problem posed for n -dimensional symmetric t-hyperbolic systems. We construct the difference splitting scheme for the numerical calculation of stable solutions for this system. To build a difference scheme, a multidimensional problem is split into one-dimensional ones and solved for each direction. A discrete analogue of the Lyapunov’s function is constructed for the numerical verification of stability solutions for the considered problem. A priori estimate is obtained for the discrete analogue of the Lyapunov’s function. This estimate allows us to assert the exponential stability of the numerical solution. A theorem on the exponential stability solution of the boundary value problem for linear hyperbolic system was proved. These stability theorems give us the opportunity to prove the convergence of the numerical solution.
Performance and In vivo Digestibility of Three Varieties of Napier Grass in Thin-Tailed Sheep
Authors: Banu Sanjaya Herdiyon , Umami Nafiatul , Astuti Andriyani , Muhlisin Muhlisin , Suwignyo Bambang , Rahman Mohammad Mijanur , Umpuch Kannika , Vury Rahayu Eka Rizky
Published: May 2022

This study aimed to determine the effect of grass variety on intake, nutrient digestibility, and performance of thin-tailed sheep. The research was conducted in Suket Ijo Farm, Sanggrahan, Wedomartani, Sleman, Yogyakarta. Twelve female thin-tailed sheep with an average body weight of 15 kg and the age of 8 to 10 months were used in this study. The sheep were given the feed formulation based on dry matter (DM): (67%), water spinach straw (8%), and 25% of either Gamma Umami grass (P1), local Napier grass (P2), or dwarf Napier grass (P3). The variables observed were feed nutrient consumption, nutrient digestibility, and thin-tailed sheep performance. The data obtained were analyzed using analysis of variance (ANOVA), and the means were separated using Duncan’s Multiple Range Test (DMRT). The results showed that the treatment feed had a significant effect (P<0.05) on the consumption of dry matter (DM), organic matter (OM), crude fiber (CF), dry matter digestibility (DMD), organic matter digestibility (OMD), crude protein digestibility (CPD), crude fiber digestibility (CFD), average daily gain (ADG), and ration conversion. However, it had no significant effect (P>0.05) on crude protein (CP) consumption and extract ether digestibility (EED). The highest ADG was in treatment P1, 105.46 g, with a ration conversion of 5.74. Hence, it was concluded that the diet containing Napier grass variety Gamma Umami showed higher feed nutrient digestibility and improved thin-tailed sheep’s performance.
Risk Factors of Diabetes among Obese Persons Attending Medical Outpatient Department in a Bangalore Hospital
Authors: Asokan R.
Published: May 2022

In this study, carried out in KC General Hospital, Bangalore, 90 obese persons were selected by non-probability convenience sampling technique using a descriptive correlational design. The data was analysed using descriptive and inferential statistics. Majority of obese persons had moderate knowledge (73.3%) and neutral attitude (82.2%) regarding risk factors of diabetes. There was a positive correlation (r=0.59) between the knowledge and attitude of obese persons; a statistically significant association was found between level of knowledge and demographic variables such as (i) age, educational background and family income of the obese persons and (ii) grade of obesity and educational background of the obese persons. The study found that obese persons have moderate knowledge and neutral attitude regarding risk factors of diabetes. There is need for health education about risk factors of diabetes among obese persons through such means as a pamphlet.
Effect of Structured Teaching Programme on Knowledge Regarding Gestational Diabetes Mellitus among Antenatal Mothers Admitted in Selected Hospitals of Jalandhar (Punjab)
Authors: Josan Pawanpreet , Kaur Harbans
Published: May 2022

In this pre-experimental design study a sample consisting of 60 antenatal mothers was selected by non-probability purposive sampling techniques. Self-structured questionnaire tool was used for assessing the knowledge of antenatal mothers. On day 3, post-test was conducted using the same structured questionnaire for assessing the effectiveness of structured teaching programme. Mean percentage of the knowledge score of post-test (16.83) was higher than pre-test (9). The ‘t’ value for total pre-test and post-test was 14.2193. The data was analysed in terms of descriptive and inferential statistics.
Scope of Transplant Nursing
Authors: Ganapathy Meena
Published: May 2022

By 2025 India will be the leading country for such chronic illness as hypertension, cardio vascular diseases and diabetes mellitus. There is a high level of prevalence of non-communicable diseases such as asthma, chronic obstructive pulmonary disease (COPD), hypertension, diabetes, mental problems, injuries, etc. Organ transplantation is evolving very fast as a mode of treatment for end-stage diseases. Every week, many people die waiting for an organ transplant. These lives could be saved by improving knowledge of organ donation and recovery among health team members and lay public alike. Nurses are in a unique position to advocate for donation and to educate their patients on the importance of being an organ donor.
К вопросу преобразования отходящих газов реактора инверсии фаз в искусственный газ
Authors: А. Б. Диханбаев  , Б. И. Диханбаев  , М. Б. Кошумбаев  , С. Б. Ыбрай
Published: May 2022

В отвалах металлургических предприятий накоплено около 20 миллиардов тонн техногенных отходов, из них 8 миллиардов шлаки черной металлургии и 12 миллиардов – цветной металлургии. Переработка их традиционными методами требует 2–3 раза больше энергии чем обработка «богатого» сырья. Опытные испытания плавильного агрегата «реактор инверсии фаз-вращающаяся печь-воздухоподогреватель» по восстановлению цинка из шлаков показали, что удельный расход энергии в 2–3 раза ниже, а удельная производительность в 3–4 раза выше чем в существующих аналогах. Недостатком агрегата является: 1) перегрев шлака на разгрузочном конце печи, что может привести к плавлению шлака, окомкованию и нарушению режима работы установки; 2) невысокая температура отходящих газов вращающейся печи, перед воздухоподогревателем, что требует применение кислорода для плавки. Данный недостаток был устранен применением способа термохимической обработки отходящих газов реактора дополнительной порцией природного газа и дожиганием искусственного газа перед воздухоподогревателем. В итоге предложена термодинамическая модель расчета и экспериментально подтверждена возможность преобразования высокотемпературных отходящих газов плавильного реактора в искусственный газ; установлено, что введение режима химической регенерации газов создает благоприятное условие, как для снижения перегрева шлака в разгрузочном конце вращающейся печи, так и для повышения температуры дутьевого воздуха до необходимого уровня, позволяющего отказаться от применения кислорода.
Procesos participativos en el reconocimiento y revitalización del patrimonio cultural inmaterial (PCI) en poblados del Iberá en la Provincia de Corrientes, Argentina
Authors: Sudar Klappenbach Luciana , Arruzazabala Laura
Published: May 2022

El artículo presenta las experiencias que se están desarrollando en el interior de la provincia de Corrientes, particularmente en la región occidental del Iberá, en torno a prácticas de reconocimiento y revitalización del Patrimonio Cultural Inmaterial (PCI). Se pretende dar cuenta de los fundamentos y metodologías implementadas, como también exponer los resultados hasta ahora alcanzados. Dichas experiencias se sustentan en estrategias dinamizadoras de prácticas participativas en los procesos de identificación y legitimación comunitaria del patrimonio cultural local en contextos de ruralidad. Se lleva adelante mediante acciones implementadas entre el Instituto de Cultura de la provincia de Corrientes, la Facultad de Artes, Diseño y Ciencias de la Cultura de la Universidad Nacional del Nordeste (UNNE) y los gobiernos locales (Concepción del Yaguareté Corá, Mburucuyá, Loreto y San Miguel), de la mano de actores comunitarios que participan en la propuesta.
El cultivo de algodón y los proyectos de desarrollo en el norte de Entre Ríos (1983-2018).
Authors: Schmuck María Emilia , Petitti Eva Mara
Published: May 2022

El análisis de este artículo se centra en el territorio del norte de Entre Ríos constituido por centros de población rural dispersa del Departamento La Paz en los que se localizó la expansión del algodón. Si bien en Entre Ríos el cultivo no ha sido predominante en términos cuantitativos, señalamos el modo en que la agricultura algodonera familiar se ha configurado como una territorialidad productiva, cuyo desarrollo presenta particularidades respecto del resto del país. A partir de una aproximación desde las estadísticas y las narrativas locales, desarrollamos las acciones –y omisiones– del Estado que incidieron en la construcción del algodón como elemento de identificación en la zona, las particulares dinámicas de los productores familiares y sus modos de asociatividad.
De la desmaternalización como "empoderamiento" a la tolerancia de la automaternalización como respuesta: tensiones y negociaciones en una política comunitaria en un distrito rural argentino
Authors: Kunin Johana
Published: May 2022

Esta investigación se enmarca en la pampa húmeda argentina y su trabajo etnográfico se realizó entre 2014 y 2017. Se describirá el perfil socioproductivo del distrito rural donde trabajé. A continuación, se analizarán los espacios y talleres de atención primaria en salud y el modo en que se extiende concretamente en La Laguna la implementación del Programa Nacional de Médicos Comunitarios. Se verá el día a día de Salud en Movimiento y cómo es un caso de política para mujeres. Así es que llegaremos a explicar dos categorías analíticas que desarrollamos: los cuidados globales y otro que es el cuidado de sí misma o el autocuidado paradójico. Creemos que es muy importante en dicho sentido, analizar un caso de éxito de “provincialización” gracias a las perspectivas desde el feminismo poscolonial.
“Cimentar en las clases rurales el amor al hogar”. Género y extensión agraria a principios del siglo XX
Authors: Mecozzi Joan Gabriel
Published: May 2022

Este artículo propone un análisis de los proyectos de extensión agrícola dirigidos a las mujeres rurales, pensados como políticas sociales, durante las décadas del ’10 y el ‘20 del siglo XX. En este período comienzan a materializarse desde el Ministerio de Agricultura de la Nación distintos esfuerzos orientados hacia la formación de las mujeres agrarias, consideradas factor fundamental en el asentamiento de los productores en el campo, que luego tendrán una intermitente continuidad interinstitucional con la creación del Instituto Nacional de Tecnología Agropecuaria en 1956. Desde una perspectiva de género, nos enfocaremos en el rol asignado a las mujeres rurales –vistas como responsables del aumento del bienestar en el campo– y en las expectativas generadas en torno a ellas.
El universo de las ferias libres: una mirada desde Osorno (sur de chile) y Dom Pedrito (sur de Brasil)
Authors: Ávila Rockenbach Mariana , Da Silva Nascimento Shirley Grazieli , Hanke Daniel , Becker Cláudio
Published: May 2022

Este trabajo constituye una contribución relacionada a la realidad de dos ferias libres en la América Latina, una ubicada en el sur de Brasil y otra en el sur de Chile. Los datos presentados fueron obtenidos a través de entrevistas en profundidad y observación no participante. La recolección de los datos fue analizada a través del análisis textual del discurso. Ambas ferias se caracterizan por la consistente presencia de la cultura local. La feria de Dom Pedrito tiene un carácter más comercial, ofreciendo solo productos de la región, mientras que la feria de Osorno utiliza toda la magia de la cultura y el arte local para caracterizar los espacios de comercialización de alimentos. Finalmente, vale la pena mencionar que ambos espacios son extremadamente importantes para la categoría de agricultura familiar, tanto en aspectos económicos como sociales.
The IoT Based Exercise Cycle
Authors: Kamlesh Kahar  , Ritanshu Khatke  , Pranav Bhople  , Jayesh Tayde  , Hariom Modokar
Published: May 2022

The "IOT Based Exercise Cycle" project combines a variety of technologies, including computer hardware and software, to provide bikers with a new modern home exercise solution that immerses them in their surroundings. As a result, a cyclist can monitor some of the most significant training data online via a web page, including speed, distance covered by the rider, heart rate, and oxygen level during exercise. Additionally, depending on the amount of peddling, a cyclist can view flashing pictures on a web page. This cycle is linked to the cyclist's heart rate and temperature, allowing him or her to keep track of their BPM (Heart Beats Per Minute) and body temperature. The system consists of both hardware and software components. Hardware is in charge of gathering, measuring, processing, and transmitting data from sensors. A server contains a Front-End Web page that displays and controls data for cyclists on the software side. Finally, there is a web page that displays all of the parameters that the rider can use to track his or her route.
Automated Supply Chain Management in IIOT 4.0 (Car Manufacturing)
Authors: Saikrishna V  , Nithileashwar S  , Muralidharan Venkatesan
Published: May 2022

Fully Automated supply chain management in Industrial IOT increases the productivity of an industry manufacturing cars exponentially than the industries that operates and depends on the human labour and power. All the stages of supply chain management are automated starting from the materials required for manufacturing a car to selling of car to the consumer (i.e end to end). The automation in each stage is done with components such as RFID device (passive), beacon tags and various type of sensors depending on the requirement of the consumers. These devices are connected wirelessly and the data obtained from it is pushed into the cloud, where we can access the data and refresh it view the data frequently as per our requirement. By this we can know the availability of stocks, live tracking of materials arriving into the warehouse and to the distributors etc. The data which is pushed into the cloud is then viewed in application built for this purpose for easy access of users. The application also helps the user to know the current condition of their car and helps them maintain it in a very healthy condition.
Identifying Exoplanets with Machine Learning Methods: A Preliminary Study
Authors: Jin Yucheng , Yang Lanyi , Chiang Chia-En
Published: May 2022

The discovery of habitable exoplanets has long been a heated topic in astronomy. Traditional methods for exoplanet identification include the wobble method, direct imaging, gravitational microlensing, etc., which not only require a considerable investment of manpower, time, and money, but also are limited by the performance of astronomical telescopes. In this study, we proposed the idea of using machine learning methods to identify exoplanets. We used the Kepler dataset collected by NASA from the Kepler Space Observatory to conduct supervised learning, which predicts the existence of exoplanet candidates as a three-categorical classification task, using decision tree, random forest, naïve Bayes, and neural network; we used another NASA dataset consisted of the confirmed exoplanets data to conduct unsupervised learning, which divides the confirmed exoplanets into different clusters, using k-means clustering. As a result, our models achieved accuracies of 99.06%, 92.11%, 88.50%, and 99.79%, respectively, in the supervised learning task and successfully obtained reasonable clusters in the unsupervised learning task.
Smsecurity: Security System and SMS Notification Cum Face Recognition
Authors: G. Domingo Winston , Dela Cruz Arnold , Nicolas Klaida , A. Gamay MIT Jennifer , N. Lardizabal Erwin , C. Gonzales Virdi
Published: May 2022

This study used the Rapid Application Development (RAD) Methodology ensured that the phases in system development are done in the software building process. A prototype was developed that is used in the pilot implementation and a questionnaire has been distributed to the respondents to gather the information that can be used to determine if the functions of the system can benefit the owner/user. The findings revealed t that the system requires functional requirements such as; the user must be computer literate and knowledgeable on how the security system works, the location must have a Telecommunication signal and USB dongle must have loaded. Non-functional requirements such as; easy to use and high cost but can be useful; Hardware and Software Requirements with the latest version of the software with the help of computers that has higher specifications that the user/homeowner requires to have a user account to access and operate the system the system has good technical performance as to functionality, reliability, efficiency, and usability. Furthermore, the system entailed efficiency and was easy to use by the respondents.
Failure Free Cloud Computing Architectures
Authors: Zimba Yolam , Maboshe Libati Hastings , Ntalasha Derrick
Published: May 2022

Cloud computing has gained popularity over the years, some organizations are using some form of cloud computing to enhance their business operations while reducing infrastructure costs and gaining more agility by deploying applications and making changes to applications easily. Cloud computing systems just like any other computer system are prone to failure, these failures are due to the distributed and complex nature of the cloud computing platforms. Cloud computing systems need to be built for failure to ensure that they continue operating even if the cloud system has an error. The errors should be masked from the cloud users to ensure that users continue accessing the cloud services and this intern leads to cloud consumers gaining confidence in the availability and reliability of cloud services. In this paper, we propose the use of N-Modular redundancy to design and implement failure-free clouds.
Extraction of Respiratory Activity from Pulse Oximeter Signals using Tunable Q-factor Wavelet Transform
Authors: Madhav K. Venu
Published: May 2022

Online monitoring of respiratory activity is essential in situations such as cardiopulmonary disorders, ambulatory monitoring, stress tests, sleep disorder investigations and post-operative hypoxemia. Extraction of respiratory activity from physiological signals having respiratory influence such as pulse oximeter’s photoplethysmographic (PPG) signals would be an alternative under clinical settings compared to that of all direct methods of recording respiratory signals such as spirometry, pneumography or capnography. The respiratory information can be extracted from PPG signal using a simple band pass filter, but the design of narrow band pass filter (NBPF) with classical filter design cannot be possible. In this paper, we present a simple method, based on tunable Q-factor Wavelet transform (TQWT), for extraction of respiratory activity from PPG signals. Advantage of TQWT stems from the fact that, the realization of practical narrow band pass filter with a specific Q-factor value can be designed, which motivated the authors to use for this application. The method is applied on, PPG data recorded from 15 healthy subjects; each consisting of simultaneously recorded PPG and respiratory signals. The extracted respiratory signals are compared with the original respiratory signals. Statistical parameters such as relative correlation co-efficient (RCC) in time domain as well as magnitude squared coherence (MSC) in frequency domain are used for performance evaluation along with error analysis using the accuracy rate (AcR) and normalized mean square error (NRMSE). Experimental results have shown a good acceptance for the extracted signal when compared with the originally recorded respiratory signal. The proposed technique could become an efficient approach for extraction of surrogate respiratory activity from PPG signals, avoiding usage of additional specialized sensor for respiratory monitoring.
M2M: Universally Designed Multimedia Training and Learning Application for Maternal Health
Authors: Betru Bisrat , Giannoumis George Anthony
Published: May 2022

The figure of Maternal Mortality Ratio in the global south is worrying and requires a serious attention from all stakeholders. Despite the progress made on maternity healthcare in the last two decades, a huge effort is still required to achieve the SDG3 target. The effort includes capacitating the health professionals and local doulas through training and learning application platforms. Universally designed multimedia training and learning applications plays such a significant role in facilitating this effort. To design an accessible maternity training and learning application, the accessibility barriers of the target diverse user groups must be identified, and the impact of the barriers need to be quantified. In this research work, we have developed a prototype called M2M that comprises VR-based animation to identify the possible accessibility barriers of multimedia-based maternity training and learning application experienced by people with low vision through the combination of heuristic and barrier walkthrough methods. We studied the severity of the identified accessibility barriers and their impact which will serve as a benchmark to develop a fully-fledged maternity health training and learning application for the global south. We have shown the strong correlation between the number of UI elements and the prevalence of accessibility barriers that must be considered in designing the UI/UX of the fully-fledged maternity training and learning application. We have also observed that multimedia contents must be evaluated independently for any accessibility issues before integrating the contents to training applications.
A Novel Spatio-Temporal Data Redundancy Elimination Approach for RFID Systems with Multiple Readers
Authors: Dash Lucy , Sen Sarma Sayan , Sinha Koushik , P. Sinha Bhabani
Published: May 2022

In this paper, we propose a Voronoi diagram based spatio-temporal data redundancy elimination approach for RFID systems having multiple readers so that every RFID tag will be read by only one reader depending on the distance between the tag and the center of the Minimum Enclosing Circle (MEC) of the Voronoi cell which the reader belongs to. Thus, the spatial redundancy in the gathered data is completely eliminated. Temporal redundancy is also minimized by reading the RFID tags at regular time intervals larger than an appropriately chosen threshold value. Existing methods of reducing data redundancy in RFID systems are often associated with loss of data, false positive errors and false negative errors. In contrast to this, our proposed technique is free from any false positive and false negative errors with no loss of data and every tag being read by only one single reader. Simulation of our proposed approach also establishes its superiority to the existing techniques in terms of these performance parameters.
RANSlicing: Towards Multi-Tenancy in 5G Radio Access Networks
Authors: Saleh Wardah , Chowdhury Shahrin
Published: May 2022

A significant purpose of 5G networks is allowing sharing resources among different network tenants such as service providers and Mobile Virtual network Operators. Numerous domains are taken in account regarding resource sharing containing different infrastructure (storage, compute and networking), Radio Access Network (RAN) and Radio Frequency (RF) spectrum. RAN and spectrum, transport. Spectrum sharing and RAN are anticipated as the fundamental part in multi-tenant 5G network. Nevertheless, there is a shortage of evaluation platforms to determine the number of benefits that can be acquired from multilevel spectrum sharing rather than single-level spectrum sharing. The work presented in this paper intend to address this issue by presenting a modified SimuLTE model is used for evaluating active RAN based on multi-tenant 5G networks. The result shows an understanding into the actual advantages of RAN slicing for multi-tenants in 5G networks.
Família nos livros didáticos em tempos de resistência no campo político-ideológico do estado
Authors: Nunes Daiany , Bento Juliana , De Faria Luci Aparecida , Pinheiro Maria de Lourdes , Faria Gabriela
Published: May 2022

A pesquisa bibliográfica de cunho qualitativo, realizada como trabalho de conclusão do curso de Pedagogia da FAMA, analisou os livros didáticos de História e Geografia do 1º ano do Ensino Fundamental I, disponibilizados pelo Programa Nacional do Livro e do Material Didático (PNLD), visando responder aos questionamentos: “Como o tema família é tratado nos livros didáticos do Ensino Fundamental I?”, “Apresenta resistência no campo político-ideológico do Estado?”. A partir do levantamento bibliográfico do termo “família na escola”, percebemos que o tema é estudado pelas diversas áreas do conhecimento, os quais trazem a problematização das diferentes configurações de família, de forma que a escola precisa se atentar de que, em uma sociedade capitalista, a forma de participação destas na vida escolar dos filhos nem sempre é a esperada pelos professores. Por sua vez, nos livros didáticos de Geografia e História do 1º ano do Ensino Fundamental I (Ápis, 2ª edição, 2017), adotados pelas escolas municipais de um município do Pontal do Triângulo Mineiro, foi perceptível a preocupação em abordar as diversas culturas, etnias e modos de se unir em família atualmente. Desta forma, concluímos que os livros didáticos adotados apresentam resistência aos ataques político-ideológicos atuais conservadores, sobretudo do Estado, que defende um único e exclusivo modelo familiar.
O conteúdo do direito de acesso à justiça na jurisprudência da corte europeia de direitos humanos
Authors: Paula Renato Tavares de
Published: May 2022

Nesta primeira edição, o autor, Defensor Público Federal, no desígnio de contribuir junto à comunidade acadêmica, analisa julgamentos realizados pela Corte Europeia de Direitos Humanos que sistematizam o conceito de acesso à justiça idealizado por aquele tribunal, em tema, diga-se de passagem, ainda pouco avaliado e aprofundado pela doutrina pátria. Os julgados estudados e comentados permitem extrair a viga mestra da estrutura do princípio fundamental de acesso à justiça: a) no caso Golder X Reino Unido conclui-se que embora existam limites implícitos ao acesso à justiça, não se pode obstar a consulta de vulnerável (preso) a um advogado; b) em Artico X Itália nota-se que a Convenção Europeia visa garantir não direitos ilusórios, mas direitos práticos e efetivos; c) no famoso Airey X Irlanda delineia-se o dever global dos estados europeus de proporcionar aos pobres a prestação de assistência gratuita para promover ações na esfera cível; d) e por fim, em Czekalla x Portugal a Corte Regional avança no conceito de acesso à justiça, ao pontuar que a defesa técnica, no sistema criminal, exige um conteúdo mínimo de proteção de efetividade. A lição da Corte Regional Europeia é intensa: é necessário que todos apresentem qualidades iguais de ingressar na esfera judicial, principalmente em demandas contra o Estado, como se pretende evidenciar durante toda a leitura do livro.
Financial Management Practices and Performance of Deposit Money Banks in Emerging Market
Authors:   Department of Finance, Faculty of Management Sciences University of Lagos, 101245, Lagos, Nigeria, Olunuga Olugbenga Adeshola , Akinrodoye Olakunle Michael ,   Department of Finance, Faculty of Management Sciences University of Lagos, 101245, Lagos, Nigeria
Published: May 2022

The purpose of this study was to determine the impact of financial management practises on the performance of Nigerian deposit money banks (DMBs). The largest financial organisations listed on the Nigerian Stock Exchange are DMBs. Financial management practises are intended to enhance banks' efficiency in financial intermediation and profit margins. Sector analysis may be used to determine the financial sector's performance and sustainability. Panel data were analysed in this research. The data for DMBs were analysed using appropriate statistical methods. In light of the conducted study, it can be concluded that financial management practises have an effect on bank performance in Nigeria. The research found that, given the industry's high level of competition and the need to perform financially, there is a need to create a strong and effective financial management strategy that ensures maximum return, increases firm share value, and maximises shareholder return.
PELAYANAN PERPUSTAKAAN IPDN KAMPUS JAKARTA DI MASA PANDEMI COVID-19
Authors: PRATALA BOGA
Published: May 2022

The Library of IPDN Campus Jakarta is required to adapt in providing information services and reference sources to all academics during the Covid-19 pandemic. This article aims to describe the services provided by the Library of IPDN Campus Jakarta during the Covid-19 period. The method used is descriptive qualitative method, and literature study. The results of this study indicate that library services to the academic community during the Covid-19 period are still carried out face-to-face. The services provided include the use and search of library materials. Before the Covid-19 pandemic took place, the number of book borrowers and visitors of the Library of IPDN Campus Jakarta in 2017 to 2019 was still quite high. During the Covid-19 pandemic, the number of book borrowers and visitors of the Library of IPDN Campus Jakarta in 2020 to 2021 experienced a significant decline with the obstacles faced by the users of Library of IPDN Campus Jakarta who were unable to visit or borrow books directly (offline). To overcome the problem, a digital library system is needed at the Library of IPDN Campus Jakarta.

ABSTRAKPerpustakaan Kampus IPDN Jakarta dituntut untuk beradaptasi dalam memberikan pelayanan informasi dan sumber referensi kepada seluruh sivitas akademika di masa pandemi Covid-19. Artikel ini bertujuan untuk mendeskripsikan pelayanan yang dilakukan Perpustakaan Kampus IPDN Jakarta selama masa Covid-19. Metode yang digunakan adalah metode kualitatif deskriptif, dan studi literatur. Hasil kajian ini menunjukkan bahwa pelayanan perpustakaan kepada sivitas akademika selama masa covid-19 ini tetap dilakukan secara tatap muka. Pelayanan yang diberikan meliputi pemanfaatan dan penelusuran bahan pustaka. Sebelum pandemi Covid-19 ini berlangsung, jumlah peminjam buku dan pengunjung Perpustakaan Kampus IPDN Jakarta pada tahun 2017 s.d 2019 masih cukup tinggi. Saat pandemi Covid-19 ini berlangsung, jumlah peminjam buku dan pengunjung Perpustakaan Kampus IPDN Jakarta pada tahun 2020 s.d 2021 mengalami penurunan yang signifikan dengan kendala yang dihadapi pengguna Perpustakaan IPDN Kampus Jakarta yang tidak dapat berkunjung atau meminjam buku secara langsung (offline). Untuk mengatasi ini, diperlukan sistem perpustakaan digital di lingkungan Perpustakan Kampus IPDN Jakarta.
New particle formation in coastal New Zealand with a focus on open-ocean air masses
Authors: Peltola Maija , Rose Clémence , Trueblood Jonathan V. , Gray Sally , Harvey Mike , Sellegri Karine
Published: May 2022

Abstract. Even though oceans cover the majority of the Earth, most aerosol measurements are from continental sites. We measured aerosol particle number size distribution at Baring Head, in coastal New Zealand, over a total period of 10 months to study aerosol properties and new particle formation, with a special focus on aerosol formation in open-ocean air masses. Particle concentrations were higher in land-influenced air compared to clean marine air in all size classes, from sub-10 nm to cloud condensation nuclei sizes. When classifying the particle number size distributions with traditional methods designed for continental sites, new particle formation was observed at the station throughout the year with an average event frequency of 23 %. While most of these traditional event days had some land influence, we also observed particle growth starting from nucleation mode in 16 % of the data in clean marine air, and at least part of this growth was connected to nucleation in the marine boundary layer. Sub-10 nm particles accounted for 29 % of the total aerosol number concentration of particles larger than 1 nm in marine air during the spring. This shows that nucleation in marine air is frequent enough to influence the total particle concentration. Particle formation in land-influenced air was more intense and had on average higher growth rates than what was found for marine air. Particle formation and primary emissions increased particle number concentrations as a function of time spent over land during the first 1–2 d. After this, nucleation seems to start getting suppressed by the pre-existing particle population, but accumulation mode particle concentration keeps increasing, likely due to primary particle emissions. Further work showed that traditional NPF events were favoured by sunny conditions with low relative humidity and wind speeds. In marine air, formation of sub-10 nm particles was favoured by low temperatures, relative humidity, and wind speeds and could happen even during the night. Our future work will study the mechanisms responsible for particle formation at Baring Head with a focus on different chemical precursor species. This study sheds light on both new particle formation in open-ocean air masses coming from the Southern Ocean and local aerosol properties in New Zealand.
Measurement report: Source apportionment of carbonaceous aerosol using dual-carbon isotopes (13C and 14C) and levoglucosan in three northern Chinese cities during 2018–2019
Authors: Zhao Huiyizhe , Niu Zhenchuan , Zhou Weijian , Wang Sen , Feng Xue , Wu Shugang , Lu Xuefeng , Du Hua
Published: May 2022

Abstract. To investigate the characteristics and changes in the sources of
carbonaceous aerosols in northern Chinese cities after the implementation of the Action Plan for Air Pollution Prevention and Control in 2013, we
collected PM2.5 samples from three representative inland cities, i.e., Beijing (BJ), Xi'an (XA), and Linfen (LF), from January 2018 to April 2019. Elemental carbon (EC), organic carbon (OC), levoglucosan, stable carbon
isotope, and radiocarbon were measured in PM2.5 to quantify the sources
of carbonaceous aerosol, combined with Latin hypercube sampling. The best
estimate of source apportionment showed that the emissions from liquid
fossil fuels contributed 29.3±12.7 %, 24.9±18.0 %, and
20.9±12.3 % of the total carbon (TC) in BJ, XA, and LF,
respectively, whereas coal combustion contributed 15.5±8.8 %, 20.9±18.0 %, and 42.9±19.4 %, respectively. Non-fossil
sources accounted for 55±11 %, 54±10 %, and 36±14 % of the TC in BJ, XA, and LF, respectively. In XA, 44.8±26.8 % of non-fossil sources were attributed to biomass burning. The highest contributors to OC in LF and XA were fossil sources (74.2±9.6 % and 43.2±10.8 %, respectively), whereas those in BJ were non-fossil sources (66.8±13.9 %). The main contributors to EC were
fossil sources, accounting for 91.4±7.5 %, 66.8±23.8 %,
and 88.4±10.8 % in BJ, XA, and LF, respectively. The decline
(6 %–16 %) in fossil source contributions in BJ since the implementation of the Action Plan indicates the effectiveness of air quality management. We suggest that specific measures targeted at coal combustion, biomass burning, and vehicle emissions in different cities should be strengthened in the future.
Climatic variation drives loss and restructuring of carbon and nitrogen in boreal forest wildfire
Authors: Eckdahl Johan A. , Kristensen Jeppe A. , Metcalfe Daniel B.
Published: May 2022

Abstract. The boreal forest landscape covers approximately 10 % of the earth's land area and accounts for almost 30 % of the global annual terrestrial sink of carbon (C). Increased emissions due to climate-change-amplified fire frequency, size, and intensity threaten to remove elements such as C and nitrogen (N) from forest soil and vegetation at rates faster than they accumulate. This may result in large areas within the region becoming a net source of greenhouse gases, creating a positive feedback loop with a changing climate. Meter-scale estimates of area-normalized fire emissions are limited in Eurasian boreal forests, and knowledge of their relation to climate and ecosystem properties is sparse. This study sampled 50 separate Swedish wildfires, which occurred during an extreme fire season in 2018, providing quantitative estimates of C and N loss due to fire along a climate gradient. Mean annual precipitation had strong positive effects on total fuel, which was the strongest driver for increasing C and N losses. Mean annual temperature (MAT) influenced both pre- and postfire organic layer soil bulk density and C : N ratio, which had mixed effects on C and N losses. Significant fire-induced loss of C estimated in the 50 plots was comparable to estimates in similar Eurasian forests but approximately a quarter of those found in typically more intense North American boreal wildfires. N loss was insignificant, though a large amount of fire-affected fuel was converted to a low C : N surface layer of char in proportion to increased MAT. These results reveal large quantitative differences in C and N losses between global regions and their linkage to the broad range of climate conditions within Fennoscandia. A need exists to better incorporate these factors into models to improve estimates of global emissions of C and N due to fire in future climate scenarios. Additionally, this study demonstrated a linkage between climate and the extent of charring of soil fuel and discusses its potential for altering C and N dynamics in postfire recovery.
Response of terrigenous weathering to the African monsoon during the penultimate deglaciation and the last interglacial period
Authors: Lepre Christopher John , Chang Clara , Yazzie Owen
Published: May 2022

Abstract. Climates of the last interglacial period (i.e., marine isotope stage 5e; MIS 5e) were associated with hydrographic, ecological, and human expansions across northern Africa. Model simulations and geological proxy data for northern subtropical latitudes resolve a dry penultimate deglaciation (Heinrich stadial 11; HS11) followed by an abrupt increase of African rainfall that predates the orbital insolation maximum of early MIS 5e. These climate changes have been attributed to the equatorward displacement and rebound of the tropical rainbelt in response to glacial reorganizations of Atlantic meridional overturning circulation (AMOC). In this paper, we examine MIS 5e and HS11 paleoenvironments by using X-ray fluorescence measurements to construct a Rb/Sr proxy record of terrigenous delivery to marine core site VM 30-40 (0o 12’ S, 20o 09’ W, 3,706 m depth) of the Atlantic Ocean. The geochemical timeseries was inferred to represent continental weathering influenced by the African monsoon evolving over the last ~260 kyr of the Quaternary. Peak Rb/Sr values were observed at the most recent and penultimate glacial maxima, attributed to different modes of continental weathering or perhaps dissolution of Sr-bearing phases by corrosive deep waters. Spectral coherency results and filtering of the Rb/Sr timeseries demonstrate an absence of obliquity yet a predominance of a precession signal that shares the best phase relationships with March-April-May insolation at the equator. This vernal signal is interpreted to indicate that the terrigenous fraction of the core had low-latitude source areas, where the monsoonal cycle is most sensitive to insolation changes about the equinoxes. These data also show a wet climate during HS11 that progresses towards peak conditions at ~127 ka, nearly coinciding with the insolation maximum of early MIS 5e. We interpret that latitude plays an important role in determining the outcomes of AMOC forcing, with the low-latitude terrigenous sources differing from the northern subtropics because the former was into the (equatorward) direction of rainbelt displacement. Lastly, these results suggest a very limited role for obliquity-controlled paleoenvironmental changes within Middle Stone Age habitats and may support previous interpretations that social networks were enhanced between the west and north African regions during times of increased rainfall forced by precession-modulated insolation.
Towards vertical wind and turbulent flux estimation with multicopter UAS
Authors: Wildmann Norman , Wetz Tamino
Published: May 2022

Abstract. Vertical wind velocity and its fluctuations are essential parameters in the Atmospheric Boundary Layer (ABL) to determine turbulent fluxes and scaling parameters for ABL processes. The typical instrument to measure fluxes of momentum and heat in the surface layer are sonic anemometers. Without the infrastructure of meteorological masts and above their typical heights, in-situ point measurements of the three-dimensional wind vector are hardly available. We present a method to obtain the three-dimensional wind vector from avionic data of small multicopter unmanned aerial systems (UAS). To achieve a good accuracy in both, average and fluctuating parts of the wind components, calibrated motor thrust and measured accelerations by the UAS are used. In a validation campaign, in comparison to sonic anemometers on a 99-m mast, accuracies below 0.2 m s-1 are achieved for the mean wind components and below 0.2 m2 s-2 for their variances. The spectra of variances and covariances show good agreement with the sonic anemometer up to 1 Hz temporal resolution. A case study of continuous measurements in a morning transition of a convective boundary layer with five UAS illustrates the potential of such measurements for ABL research.
Environmental Controls on Observed Spatial Variability of Soil Pore Water Geochemistry in Small Headwater Catchments Underlain with Permafrost
Authors: Conroy Nathan Alec , Heikoop Jeffrey , Lathrop Emma , Musa Dea , Newman Brent , Xu Chonggang , McCaully Rachael , Arendt Carli , Salmon Verity , Breen Amy , Romanovsky Vladimir , Bennett Katrina , Wilson Cathy , Wullschleger Stan
Published: May 2022

Abstract. Soil pore water (SPW) chemistry can vary substantially across multiple scales in Arctic permafrost landscapes. The magnitude of these variations and their relationship to scale are critical considerations for understanding current controls on geochemical cycling and for predicting future changes. These aspects are especially important for Arctic change modelling where accurate representation of sub-grid variability may be necessary to predict watershed scale behaviours. Our research goal was to characterize intra- and inter-watershed soil water geochemical variations at two contrasting locations in the Seward Peninsula of Alaska, USA. We then attempt to establish which environmental factors were important for controlling concentrations of important pore water solutes in these systems. The SPW geochemistry of 18 locations spanning two small Arctic catchments were examined for spatial variability and its dominant environmental controls. The primary environmental controls considered were vegetation, soil moisture/redox condition, water/soil interactions and hydrologic transport, and mineral solubility. The sampling locations varied in terms of vegetation type and canopy height, presence or absence of near-surface permafrost, soil moisture, and hillslope position. Vegetation was found to have a significant impact on SPW NO3 concentrations, associated with the localized presence of nitrogen-fixing alders and mineralization and nitrification of leaf litter from tall willow shrubs. The elevated NO3 concentrations were however, frequently equipoised by increased microbial denitrification in regions with sufficient moisture to support it. Vegetation also had an observable impact on soil moisture sensitive constituents, but the effect was less significant. The redox conditions in both catchments were generally limited by Fe reduction, seemingly well-buffered by a cache of amorphous Fe hydroxides, with the most reducing conditions found at sampling locations with the highest soil moisture content. Non-redox-sensitive cations were affected by a wide variety of water-soil interactions that affect mineral solubility and transport. Identification of the dominant controls on current SPW hydrogeochemistry allows for qualitative prediction of future geochemical trends in small Arctic catchments that are likely to experience warming and permafrost thaw. As source areas for geochemical fluxes to the broader Arctic hydrologic system, geochemical processes occurring in these environments are particularly important to understand and predict with regards to such environmental changes.
Estimation of OH in urban plume using TROPOMI inferred NO2 / CO
Authors: Lama Srijana , Houweling Sander , Boersma K. Folkert , Aben Ilse , Denier van der Gon Hugo A. C. , Krol Maarten C.
Published: May 2022

Abstract. A new method is presented to estimate urban hydroxyl radical (OH) concentrations using the downwind decay of the Tropospheric Monitoring Instrument (TROPOMI) derived nitrogen dioxide (NO2) / carbon monoxide (CO) ratio combined with Weather Research Forecast (WRF) simulations. Seasonal OH concentrations, nitrogen oxides (NOx) and CO emissions for summer (June to October, 2018) and winter (November, 2018 to March, 2019) are derived for Riyadh. WRF is able to spatially simulate NO2 and CO urban plumes over Riyadh as observed by TROPOMI. However, WRF-simulated NO2 plumes close to center of the city are overestimated by 25 % in summer and 40 to 50 % in winter compared to TROPOMI observations. WRF simulated CO plumes differ by 10 % with TROPOMI in both seasons. The differences between model and TROPOMI are used to optimize the OH concentration, NOx and CO emissions iteratively using a least squares method. For summer, both the NO2 / CO ratio optimization and the XNO2 optimization imply that the OH prior from the Copernicus Atmospheric Monitoring Service (CAMS) has to be increased by 32.03±4.0 % . The OH estimations from the NO2 / CO ratio and the XNO2 optimization differ by 10 %. Summer Emission Database for Global Atmospheric Research v4.3.2 (EDGAR) NOx and CO emissions over Riyadh need to be increased by 42.1±8.7 % and 100.8±9.5 %. For winter, the optimization method increases OH by ~52.0±5.3 %, while reducing NOx emission by 15.45± 3.4 % and doubling the CO emission. TROPOMI derived OH concentrations and pre-existing Exponentially Modified Gaussian function fit (EMG) method differ by 18 % in summer and 7.5 % in winter, confirming that urban OH concentrations can be reliably estimated using the TROPOMI-observed NO2 / CO ratio.
A comparison of straight-ray and curved-ray surface wave tomography approaches at near-surface studies
Authors: Karimpour Mohammadkarim , Slob Evert , Socco Laura Valentina
Published: May 2022

Abstract. Surface waves are widely used to model shear-wave velocity of the subsurface. Surface wave tomography (SWT) has recently gained popularity for near-surface studies. Some researchers have used straight-ray SWT in which it is assumed that surface waves propagate along the straight line between receiver pairs. Alternatively, curved-ray SWT can be employed by computing the exact paths between the receiver pairs. SWT is a well-established method in seismology and has been employed in numerous seismological studies. However, it is important to make a comparison between these two SWT approaches for near-surface applications since the amount of information and the level of complexity in near-surface are different from seismological studies. We apply straight-ray and curved-ray SWT to four near-surface examples and compare the results in terms of the quality of the final model and the computational cost.