bluuebunny/crossref_metadata_2025 huggingface dataset:
FORECASTING URBAN POPULATION GROWTH IN THE PHILIPPINES USING AUTOREGRESSIVE INTEGRATED MOVING AVERAGE (ARIMA) MODEL
Authors: Liana Neil C. Estoque  , Leanna Marie D. Dela Fuente  , Romie C. Mabborang  , Marivic G. Molina
Published: July 2022

The Philippines is one of the fastest urbanizing countries in the East Asia and Pacific region (Baker & Watanabe, 2017). Despite having its advantages, urbanization still has its challenges that require extensive urban management and development programs for it to be prevented and minimized. In this paper, the researchers forecasted the urban population growth of the Philippines using the Autoregressive Integrated Moving Average (ARIMA) Model. The historical data obtained from the World Bank Group was from 1960 to 2020. The R Programming Language was used as the medium for the entire forecasting process. Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF) plots, Augmented Dickey-Fuller (ADF) test, Phillips-Perron (PP) test, and Kwiatkowski, Phillips, Schmidt, and Shin (KPSS) test were used for testing the stationarity of the time-series data. Moreover, Akaike Information Criteria (AIC), Corrected Akaike Information Criterion (AICc), and Schwarz Information Criteria (SIC) were used as criteria for selecting the best ARIMA model. It was shown that the best ARIMA model for forecasting the urban population growth of the country is ARIMA (20, 1, 10). This model has been formulated and chosen through the mentioned statistical tests, and criteria for validation, and was further validated using error measures. The chosen ARIMA model was proven to be accurate based on the Root Mean Square Error (RMSE) of 0.18877 and the Mean Absolute Percentage Error (MAPE) of 3.71%. The researchers found an increase in the trend of 1.95% by 2022, 2.08% by 2024, 2.19% by 2026, and 2.36% by 2028. This potential rise in urban population growth in the Philippines may improve the economy of the country for the next 6 years, but this could also imply that the underlying issues of urbanization may get worse. The researchers conclude that the Philippine national government and local government units should have better and strengthened urban management and development programs to aid these problems. Government officials and even private sectors may use this paper as a reference to have an informed decision and policy-making.
KEYWORDS: Autoregressive Integrated Moving Average (ARIMA) Model, Box-Jenkins Method, Urbanization, Urban Population Growth, Forecast, R Programming Language
Sampling, sample handling and sample preparation of raw sugar, white sugar, speciality sugars and plantation white sugar
Authors: Mead Alan N.
Published: July 2022

Good sampling methods can reduce the sampling error, bad increase it; the contribution of sampling error to what is perceived to be analytical error is as important as any error in the analyses themselves. The ICUMSA® Referee for Sampling, sample Handling and sample Preparation has carried out a three stage study to establish new sampling guidelines for crystalline and liquid sugars. The paper is a shortened version of his report for the ICUMSA® Proceedings 2021 detailing the experimental layout aiming to obtain an optimized way of preparing test samples from laboratory samples. The analytical results of the conductometric ash determination with their statistical analysis are given and compared with previous studies. Based on the results the 2022 ICUMSA® Methods book includes new standards on the collection of laboratory samples, highlighting known pitfalls and suggesting ways that they may be avoided.
Kepentingan Memahami Fakta Kes dalam Prosiding Kehakiman: Analisis dari Perspektif Kehakiman Islam
Authors: Awang Mohd Badrol
Published: July 2022

Kepentingan memahami fakta (fiqh al-waqi') telah banyak dibincangkan oleh sarjana perundangan Islam dalam kajian mereka mengenai teori perundangan Islam. Dalam ruang lingkup teori perundangan Islam, pemahaman fakta telah diterima sebagai komponen penting bagi amalan ijtihad dan diiktiraf sebagai justifikasi yang sah untuk pembaharuan ijtihad. Bertitik tolak daripada pernyataan di atas, namun dalam konteks yang berbeza, makalah ini membincangkan konsep dakwaan (al-da'wa) dan kepentingan memahami fakta kes dalam prosiding Kehakiman Islam. Kajian perpustakaan bersifat doktrin ini membuktikan bahawa, dalam prosiding kehakiman Islam, pemahaman tentang fakta kes adalah sangat mustahak. Kegagalan dan kelalaian untuk memahami fakta kes akan mempengaruhi ketepatan sesuatu keputusan kehakiman dan boleh membawa kepada ketidakadilan. Selanjutnya, makalah ini menegaskan bahawa jenis fakta yang perlu diambil kira dan difahami oleh hakim perbicaraan tidak terhad pada fakta langsung kes, malah keadaan dan realiti semasa kehidupan masyarakat juga perlu diambil kira. Akhirnya, makalah itu menegaskan bahawa keperluan untuk memahami fakta kes memerlukan usaha ijtihad yang mesti dijalankan oleh semua hakim tanpa mengira status mereka sebagai mujtahid atau muqallid.
Aturan 53 Kaedah-Kaedah Mahkamah 2012: Satu Analisis Berkenaan Semakan Kehakiman
Authors: Zairiasdi Muqris Alif , Mohd Nur Wafaa Azreen , Ismail Surfaqihah , Shu Min Tan , Rizal Ahmad Nadzli , Amir Hamzah Amira Nur Diana
Published: July 2022

Penggunaan kalimah "Allah" oleh orang bukan Islam menjadi isu kontroversi yang hangat dibincangkan pada awal tahun 2021. Hal ini disebabkan oleh keputusan Mahkamah Tinggi Malaya dalam kes Jill Ireland bt Lawrence Bill v Menteri Bagi Kementerian dalam Negeri Malaysia & Anor [2021] 8 MLJ 890 (Jill Ireland). Kes ini telah dikritik oleh umum diakibatkan oleh dapatan Mahkamah dalam semakan kehakiman oleh Pemohon. Tujuan kajian ini dilakukan adalah untuk membincangkan cara Mahkamah Tinggi Malaya mengaplikasikan bidang kuasa Mahkamah apabila melakukan semakan kehakiman terhadap isu ini. Selain itu, prinsip daripada kes ini juga dibandingkan dengan kes di Malaysia tentang pengaplikasian semakan kehakiman untuk mendapat suatu prinsip undang-undang semakan kehakiman yang digunakan di Malaysia. Daripada prinsip tersebut, penulis membandingkannya dengan prinsip undang-undang tentang semakan kehakiman di negara luar, iaitu India. Oleh sebab itu, bagi membincangkan isu ini dengan lebih mendalam, penulis menggunakan kaedah kualitatif kerana kebanyakan sumber yang diperoleh adalah daripada buku dan artikel. Kajian menerusi keputusan kes juga dilakukan oleh penulis. Pengumpulan data kajian juga diperoleh daripada kaedah kepustakaan. Penulis juga telah memberikan pendapat penulis tentang isu yang dibincangkan.
Coloring Graph Classes with no Induced Fork via Perfect Divisibility
Authors: Karthick T. , Kaufmann Jenny , Sivaraman Vaidy
Published: July 2022

For a graph $G$, $\chi(G)$ will denote its chromatic number, and $\omega(G)$ its clique number. A graph $G$ is said to be perfectly divisible if for all induced subgraphs $H$ of $G$, $V(H)$ can be partitioned into two sets $A$, $B$ such that $H[A]$ is perfect and $\omega(H[B]) < \omega(H)$. An integer-valued function $f$ is called a  $\chi$-binding function for a hereditary class of graphs $\cal C$ if $\chi(G) \leq f(\omega(G))$ for every graph $G\in \cal C$. The fork is the graph obtained from the complete bipartite graph $K_{1,3}$ by subdividing an edge once. The problem of finding a quadratic $\chi$-binding function for the class of fork-free graphs is open. In this paper, we study the structure of some classes of fork-free graphs; in particular, we study the class of (fork, $F$)-free graphs $\cal G$ in the context of perfect divisibility, where $F$ is a graph on five vertices with a stable set of size three, and show that every $G\in \cal G$ satisfies $\chi(G)\le \omega(G)^2$. We also note that the class $\cal G$ does not admit a linear $\chi$-binding function.
Minimum Number of Edges of Polytopes with $2d+2$ Vertices
Authors: Pineda-Villavicencio Guillermo , Ugon Julien , Yost David
Published: July 2022

We define two $d$-polytopes, both with $2d+2$ vertices and $(d+3)(d-1)$ edges, which reduce to the cube and the 5-wedge in dimension three. We show that they are the only minimisers of the number of edges, amongst all $d$-polytopes with $2d+2$ vertices, when $d=6$ or $d\ge8$. We also characterise the minimising polytopes for $d=4, 5$ or 7, where four sporadic examples arise.
Every Steiner Triple System Contains Almost Spanning $d$-Ary Hypertree
Authors: Arman Andrii , Rödl Vojtěch , Sales Marcelo Tadeu
Published: July 2022

In this paper we make a partial progress on the following conjecture: for every $\mu>0$ and large enough $n$, every Steiner triple system $S$ on at least $(1+\mu)n$ vertices contains every hypertree $T$ on $n$ vertices. We prove that the conjecture holds if $T$ is a perfect $d$-ary hypertree.
Classical Length-5 Pattern-Avoiding Permutations
Authors: Clisby Nathan , Conway Andrew R. , Guttmann Anthony J. , Inoue Yuma
Published: July 2022

We have made a systematic numerical study of the 16 Wilf classes of length-5 classical pattern-avoiding permutations from their generating function coefficients. We have extended the number of known coefficients in fourteen of the sixteen classes. Careful analysis, including sequence extension, has allowed us to estimate the growth constant of all classes, and in some cases to estimate the sub-dominant power-law term associated with the exponential growth.

In six of the sixteen classes we find the familiar power-law behaviour, so that the coefficients behave like $s_n \sim C \cdot \mu^n \cdot n^g,$ while in the remaining ten cases we find a stretched exponential as the most likely sub-dominant term, so that the coefficients behave like $s_n \sim C \cdot \mu^n \cdot \mu_1^{n^\sigma} \cdot n^g,$ where $0 < \sigma < 1.$ We have also classified the 120 possible permutations into the 16 distinct classes.

We give compelling numerical evidence, and in one case a proof, that all 16 Wilf-class generating function coefficients can be represented as moments of a non-negative measure on $[0,\infty)$. Such sequences are known as Stieltjes moment sequences. They have a number of nice properties, such as log-convexity, which can be used to provide quite strong rigorous lower bounds.

Stronger bounds still can be established under plausible monotonicity assumptions about the terms in the continued-fraction expansion of the generating functions implied by the Stieltjes property. In this way we provide strong (non-rigorous) lower bounds to the growth constants, which are sometimes within a few percent of the exact value.
Maximal Chains in Bond Lattices
Authors: Ahirwar Shreya , Fishel Susanna , Gya Parikshita , Harris Pamela , Pham Nguyen , Vindas Meléndez Andrés , Vo Dan Khanh
Published: July 2022

Let $G$ be a graph with vertex set $\{1,2,\ldots,n\}$. Its bond lattice, $BL(G)$, is a sublattice of the set partition lattice. The elements of $BL(G)$ are the set partitions whose blocks induce connected subgraphs of $G$.

In this article, we consider graphs $G$ whose bond lattice consists only of noncrossing partitions. We define a family of graphs, called triangulation graphs, with this property and show that any two produce isomorphic bond lattices. We then look at the enumeration of the maximal chains in the bond lattices of triangulation graphs. Stanley's map from maximal chains in the noncrossing partition lattice to parking functions was our motivation. We find the restriction of his map to the bond lattice of certain subgraphs of triangulation graphs. Finally, we show the number of maximal chains in the bond lattice of a triangulation graph is the number of ordered cycle decompositions.
On Distinct Distances Between a Variety and a Point Set
Authors: McLaughlin Bryce , Omar Mohamed
Published: July 2022

We consider the problem of determining the number of distinct distances between two point sets in $\mathbb{R}^2$ where one point set $\mathcal{P}_1$ of size $m$ lies on a real algebraic curve of fixed degree $r$, and the other point set $\mathcal{P}_2$ of size $n$ is arbitrary. We prove that the number of distinct distances between the point sets, $D(\mathcal{P}_1,\mathcal{P}_2)$, satisfies\[D(\mathcal{P}_1,\mathcal{P}_2) = \begin{cases}\Omega(m^{1/2}n^{1/2}\log^{-1/2}n), \ \ & \mbox{ when } m = \Omega(n^{1/2}\log^{-1/3}n), \\\Omega(m^{1/3}n^{1/2}), \ \ & \mbox{ when } m=O(n^{1/2}\log^{-1/3}n). \end{cases}\]This generalizes work of Pohoata and Sheffer, and complements work of Pach and de Zeeuw.
Maximizing $2$-Independents Sets in $3$-Uniform Hypergraphs
Authors: Keough Lauren , Radcliffe Jamie
Published: July 2022

In this paper we solve three equivalent problems. The first is: what $3$-uniform hypergraph on a ground set of size $n$, having at least $e$ edges, has the most $2$-independent sets? Here a $2$-independent set is a subset of vertices containing fewer than $2$ vertices from each edge. This is equivalent to the problem of determining the $3$-uniform hypergraph for which the size of $\partial^+(\partial_2(\mathcal{H}))$ is minimized. Here $\partial_2({\cdot})$ is the down-shadow on level $2$, and $\partial^+({\cdot})$ denotes the up-shadow on all levels. This in turn is equivalent to the problem of determining which graph on $n$ vertices having at least $e$ triangles has the most independent sets. The (hypergraph) answer is that, ignoring some transient and some persistent exceptions which we can classify completely, a $(2,3,1)$-lex style $3$-graph is optimal.

We also discuss the general problem of maximizing the number of $s$-independent sets in $r$-uniform hypergraphs of fixed size and order, proving some simple results, and conjecture an asymptotically correct general solution to the problem.
A Study of Using Machine Learning in Predicting COVID-19 Cases
Authors: Maliyaem Maleerat , Nguyen Minh Tuan  , Lockhart Demontray , Muenthong Supattra
Published: July 2022

With an unprecedented challenge to combat COVID-19, the prediction of confirmed cases is very important to ensure medical aid and healthy living conditions. In order to predict confirmed cases, the current study uses a dataset prepared by the White House Office of Science and Technology Policy which brought together companies and research to address questions concerning COVID-19. The importance of this was to identify factors that seem to affect the transmission rate of COVID-19. The focus of the current research, however, is to predict global cases of COVID-19. There have been many papers written about the prediction of confirmed cases and fatalities, but they failed to show promising results. Our research applies machine learning for predicting fatalities in the world using the COVID-19 Forecasting dataset from Kaggle. After trying several algorithms, our findings reveal that Logistic Regression, Decision Tree, KNeighbors, GaussianNB, and Random Forest algorithms provide the best predictions. Thus, the results show Random Forest as having the highest accuracy followed by Logistic Regression and Decision Tree. The results are promising opening up the door for further research.
Comparison of Health-Relevant Polyphenolic Component Content and Bioavailability of Bilberry (Vaccinium Myrtillus L.), Blueberry (Vaccinium Sect. Cyanococcus Rydb.) and Chokeberry (Aronia Melanocarpa (Michx.) Elliott)
Authors: Chen Xiao , Wu Yan-Chao , Qian Liu-Hong , Zhang Yu-He , Gong Pi-Xian , Li Hui-Jing
Published: July 2022

The fruit-based dietary supplement business is flourishing, and many plant bioactive compounds exhibit beneficial effects on health. Polyphenols, including anthocyanins, proanthocyanidins, flavanols, phenolic acids and flavanols in bilberry, blueberry and chokeberry, are the bio-factors that determine the biological activities of the three berries. Many reports on phenolic compounds and their biological activities in berries have been published. Therefore, it is urgent to make a systematic comparison among them. We reviewed these scientific researches about phenolic substances including their compositions, contents and bioavailability from the bilberry, blueberry and chokeberry. On this basis, the phenolic compounds regarding monomer components and their contents in the three berries were systematically summarized. Variations of anthocyanidins within interspecies and different families were explained. Biological properties including biostability and bioavailability of anthocyanin and prospects for further study on berries were contained.
Ensuring Future Resilience beyond ICT and Online Teaching and Learning of Social Studies in Ghanaian Senior High Schools: Lessons from COVID-19 Pandemic
Authors: Zengulaaru John , Nyamekye Ernest
Published: July 2022

The emergence of COVID-19 has posed unprecedented challenges to every sphere of social life, including education. To mitigate the educational challenges, students and teachers were urged to adjust to online teaching and learning. This spurred a slew of studies into ICT and online teaching and learning. However, studies had given little attention to resilient mechanisms beyond ICT and online teaching and learning, particularly, in Social Studies. This study, therefore, purported to elicit the challenges encountered by students and teachers in the teaching and learning of Social Studies during the COVID-19 school closures. It also sought to identify holistic resilient approaches to withstand future unforeseen contingencies. An explanatory sequential mixed method design was employed in this study. Overall, 300 form three students of senior high school and 15 Social Studies teachers participated in this study. Quantitative data were analyzed using SPSS Version 20. Thematic analysis was used to analyse the qualitative data. Some of the challenges identified by this study in the teaching and learning of Social Studies include lack of technical support, data cost, unstable or no Internet connection, absence of television or radio, no or poor electricity connection, inadequate textbook ownership and absence of self-learning textbooks. The resilient mechanisms suggested by teachers and students towards future pandemics include the development of online learning infrastructure, provision of technical support for students and teachers, provision of ICT and online learning equipment for economically disadvantaged students, provision of solar-powered or dry cell ICT or online teaching and learning equipment, expansion of the school infrastructure and provision of adequate self-learning and informative textbooks. It was concluded that, with the aforementioned resilient mechanisms, Social Studies education will not be truncated in case of future pandemics. The study recommended curriculum reform in order to design textbooks that are informative enough to allow learners to learn easily. This study suggested that further studies be conducted to include all major stakeholders in education so as to unravel all other resilient strategies.
STUDENTS’ PROBLEMS IN WRITING COMPOUND SENTENCES
Authors: Fadhilah Silviana
Published: July 2022

The purpose of this research was to describe the third year students’ problems in writing compound sentences expressing contrast, reason, and additional idea at English Department of Bung Hatta University. Descriptive method was used as the design of this research. The number of population members was 53 students. The writer used total sampling technique to select the sample. Writing test was the instrument to get the data. The students were asked to write 21 compound sentences : 7 sentences expressing contrast, 7 sentences expressing reason, and 7 sentences expressing additional idea. The test was reliable because the reliability of the test was high (0.98).The result of this research showed that generally the third year students at English Department of Bung Hatta University had problem in writing      compound sentences. They had problems in writing compound sentences expressing contrast, reason, and additional idea. Among those problems, the most problem the students face was writing compound sentences expressing reason (39.49%). In writing compound sentences expressing reason, the most problem the students face was in mechanics (41.06%), especially in punctuation (25.13%).Dealing with the conclusion, the writer suggested to the lecturers to use matching picture as the media to teach compound sentence to the students. The students are suggested to do more exercises in writing compound sentences expressing reason by using matching pictures. The next writers are expected to find out students’ problems in writing compound sentences in other conjunction such as compound sentences with semicolon, correlative conjunction, and conjunctive adverbs.
 
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The Effect Of Perceived Risk, Financial Knowledge And Government Support On User Interest With Perceived Usefulness As An Intervening Variable: Study On E-Wallet Users In Sulawesi
Authors: Indriyani MS Eka , Fatma Fatma , Hasyim Ruslan
Published: July 2022

Indonesia's economic growth still has a significant impact during the COVID-19 pandemic. Various efforts have been made by the government to prevent the spread of the virus by implementing the Large-Scale Social Restriction (PSBB) policy to the Enforcement of Community Activity Restrictions (PPKM). This is implemented to avoid crowds and all activities can only be done at home (work from home), including satisfy consumptive needs. During the pandemic, there is the right choice to transact only from home or where we are currently, namely the use of digital e-wallet payments. This study aims to analyze the effect of perceived risk, financial knowledge and government support on user’s interest of e-wallet with perceived usefulness as an intervening variable in Sulawesi Island. Data was collected through a questionnaire or google form and then analyzed using the Smart-PLS 3.0 software. The sample is 384 e-wallet users who are in the Sulawesi Island with the criteria that they have used e-wallet since March 2019 until now. The results of the study prove that of the seven direct relationships there is only one relationship does not have a significant effect, namely government support does not effects e-wallet user’s interest. While the other three indirect relationships proved to have a significant effect
Comparison of Statistical Methods for Claims Reserve Estimation Using R Language
Authors: Raço Endri , , Haxhi Kleida , , Llagami Etleva , Zaçaj Oriana
Published: July 2022

Stochastic methods of reserves estimation serve to assess the technical provisions of outstanding claims and forecast cash payments of claims in the coming years. The chain ladder model developed by Mack is the more prevalent model. The main deﬁciency in the chain-ladder model is that the chain-ladder model depends on the last observation on the diagonal. If this last observation is an outlier, this outlier will be projected to the ultimate claim. One of the possibilities to smooth outliers on the last observed diagonal is to robustify such observations, making use of the maximum likelihood estimation along with the common Loss Development Factor (LDF) curve fitting and Cape Cod (CC) techniques. This paper aims to highlight the advantages of using these methods for the best estimate of claims reserves in the Domestic Motor Third Party Liability portfolio. The maximum–likelihood parameter estimation and Chi-square test, are used to specify the probability distribution that best fits the data. Using the Standard Chain Ladder method, LDF, and CC method the claims reserve is calculated based on the run-off triangles of paid claims or the run-off triangles of the incurred claims. Many times, the projections based on the paid claims are different than the projections based on the incurred claims. The solution for this problem is the Munich Chain Ladder method.
Buenas prácticas en el uso de tecnologías de la información y comunicación (TICs) por parte de los estudiantes en universidades ecuatorianas
Authors: Paredes Wladimir
Published: July 2022

Con la finalidad de realizar una guía de buenas prácticas para la gestión de Tecnologías de Información y Comunicación (TICs) en el proceso de enseñanza aprendizaje (PEA) en instituciones de educación superior (IES), se desarrolló un cuestionario aplicado a 906 estudiantes de las carreras Administrativas de dos universidades representativas del Ecuador (Quito y Guayaquil) cuyos resultados se categorizaron por grupos de edad, género y nivel de estudio. Se pudo observar que la gran mayoría de estudiantes es menor a 20 años y los hombres son minoría en los primeros niveles; en general los estudiantes más jóvenes son los que utilizan la tecnología más actualizada. Todas las buenas prácticas propuestas en el artículo deberían considerarse en los procesos de admisión de los estudiantes a Instituciones de Educación Superior (IES) del Ecuador, para garantizar que las competencias de estos, estén alineadas a las necesidades de la universidad y la sociedad en general; y así aportar a la mejora continua de cada institución.
Keine Quietsch- und Knarzgeräusche
Authors: Schumann Arndt , Hencken Tim
Published: July 2022

An den Verbindungsstellen von Kunststoff-Bauteilen sowie an dreh- oder linearbeweglichen Gelenken kommt es zu problematischen Reibbeanspruchungen. Optimierte Kunststoff-Zusammensetzungen helfen, dies zu vermeiden. So bewirken reibungsoptimierte ABS-, PC- und ASA-Kunststoffe im Interieur von Fahrzeugen eine leichtgängige Bedienung der Armaturen und verhindern so Quietsch- und Knarzgeräusche.
Additive Fertigungslösungen
Authors: Reichel Ina
Published: July 2022

Die additive Fertigung ist in der Industrie angekommen. Die Schlüsseltechnologie wird in immer mehr Bereichen zu einem konkreten Umsetzungsthema. Die Frage lautet nicht mehr, ob die Technologie genutzt werden sollte, sondern wie und für welche konkreten Anwendungen die Potenziale von Additive Manufacturing für eine schnelle, flexible und nachhaltige Produktion genutzt werden können.
Untersuchung zur Dimensionierung von Klemmnabenverbindungen
Authors: Lippardt Sven
Published: July 2022

Inhalt Um Klemmnabenverbindungen genauer zu dimensionieren, wird eine Methode vorgestellt, mit der bestimmt werden kann, welchen Einfluss die Proportionen der Verbindung und die Steifigkeit des Nabenwerkstoffs haben. Hierzu wird eine Simulation mithilfe der Finite-Elemente-Methode durchgeführt. Weiterhin werden die Ergebnisse von praktischen Versuchen zur Ermittlung des Rutschmoments von Klemmnabenverbindungen mit unterschiedlichen Werkstoffen, Nabeninnen- und Wellenoberflächen sowie Schmierzuständen vorgestellt und Haftreibwerte für die Dimensionierung von Klemmnabenverbindungen genannt.
ERGONOMICS AND STRESS REDUCTION IN ORGANIZATIONS
Authors: AYANDELE  , AYANYINKA ISAAC , Dr.OBIALOR  , CHUKWUEMEKA DONATUS
Published: July 2022

Implementing ergonomic solutions can make employees more comfortable and increase productivity. This study focused on examining the impact of ergonomics on stress reduction in Globacom and MTN Organizations. The study adopted a survey research approach in its design. The study was made up of a sample size of 95 samples drawn from a population of 109 using the Taro Yamane formula. The study used the simple percentage, Pearson productmoment correlation, and simple regression with the aid of SPSS version 20. Findings of the study include that ergonomic work design variables have a significant impact on employee stress reduction. The Study, however, recommends that; to enhance employees well being, organization need to balance work demands, employees’ skill, and the nature of the equipment used in completing a task. The study concludes that ergonomics has an enormous impact on the performance of employees in Globacom and MTN organizations.
IMPACT OF LOCAL SUGAR PRODUCING INDUSTRIES ON NATIONAL ECONOMY: A CASE OF KAGERA SUGAR LTD, TANZANIA
Authors: KALUME  , V.M  , KONGOLO  , M
Published: July 2022

The aim of this paper was to examine the contribution of Kagera Sugar Limited (KSL) to sugar production in Tanzania using a descriptive approach. The findings reveal that the company has contributed well to increasing sugar production in the country. KSL is the third sugar producing company in the country after Kilombero Sugar Company and Tanganyika Plating Company. Its sugar production was about 50,207 MT in 2014 with a market share of about 17.05%. The paper concludes that the issue of sugar gap in the sugar industry in Tanzania could be addressed through an understanding of the ‘political logic of scarcity’ to avoid corruption. Without drastic measures on productive investments, the scarcity in sugar production cannot be overcome, and corruption is likely to continue.
PARADIGM FOR RURAL POVERTY ALLEVIATION IN NIGERIA: PUTTING THE RURAL PEOPLE AT THE TOP
Authors: EFFIONG MERCY ITA , ESSIEN KEMFON ANIEDI
Published: July 2022

The alleviation of poverty in Nigeria has rather proven to be an uphill task as poverty remains endemic, particularly amongst the rural population. This paper interrogates the poverty alleviation programmes of the Nigerian government in the current decade with a view to proposing an alternative paradigm for rural poverty alleviation. Through an observationaltheoretical approach, a model of poverty alleviation that is anchored on the perceptions, views and aspirations of the rural people was articulated and presented. The model represents a shift from a conventional top-bottom approach where the “Urban Elites” occupy the top role in the poverty alleviation schemes to put the rural people at the top. It is believed that making rural people major stakeholders in the planning and implementation of poverty alleviation programmes in their domain is key to addressing rural poverty
THE EFFECT OF CONSUMER TRAITS AND SITUATIONAL FACTORS ON IMPULSE BUYING IN THE PANDEMIC TIME (CASE STUDY ON SHOPEE USER IN GREATER JAKARTA)
Authors: FITRI FATHARANI AGHNIA , MILLANYANI HEPPY
Published: July 2022

Online shopping has become a habit for many people, especially during the pandemic that occurred in Indonesia. In the current state of the Covid-19 pandemic, consumer impulse buying is a concern at a time of economic and social change. Shopee as an online store provider for its users must first identify the characteristics of consumers who will use and transact at Shopee because basically, the characteristics of consumers are different for each individual. This study aims to see how much the influence of three dimensions of consumer traits and four dimensions of situational factors on impulse buying on e-commerce Shopee by using multiple linear regression analysis and the number of respondents is 397 Shopee users in Greater Jakarta. The findings of this study reveal that the variables Impulse Buying Tendency (IBT), Shopping Enjoyment Tendency (SET), Materialism (MT), Persons Situation (PS), Website Quality (WQ), Motivational Activities by Retailer (MAR), and Product Attributes (PA) simultaneously have an effect on impulsive buying on Shopee users in Greater Jakarta. While WQ and PA partially have no effect on impulsive buying on Shopee users in Greater Jakarta.
THE IMPACT OF STORM WATERS TO WATER QUALITY IN SPRINGS AND RIVERS OF KISII MUNICIPALITY, KISII COUNTY, KENYA
Authors: MANYARA MEJA JAMES OKINYI , BASWETI EVANS ABENGA , OMWOYO ANNE MONYENYE
Published: July 2022

Storm water causes a major contamination for surface and subsurface waters in both urban and rural areas. In Kisii municipality it is observed that the major source of contaminants are non-point source pollution from farms and urban markets/garages. The study is carried in Kisii municipality on two rivers and five spring sampling a total of nine points, springs (4) and rivers (5) between 2019-2020 were identified through water sampling. Water quality parameters (Ammonium, Turbidity, Total Dissolved Solids, Electrical Conductivity, Total Coliform Count, Fecal Coliforms, Total Nitrates, PH, Hardness, Colour, Dissolved Oxygen Concentration and Total Suspended Solids) were measured and determined using Gebesys 10S VIS Spectrophotometer at Kenya Marine Fisheries Research Institute laboratories in Kisumu. Overall mean of five parameters (Ammonium, Total Nitrates, Total Phosphates, fecal and total coliforms) exceeded recommended World Health Organization and National Environmental Management Authority standards. Maximum values of turbidity, total dissolved solids, dissolved oxygen and hardness exceed these standards during the wet period.
ZERO KNOWLEDGE PROOF FOR HOMOMORPHICALLY ENCRYPTED TRANSACTIONS IN 5IRE BLOCKCHAIN
Authors: MATTILA VILMA , DWIVEDI PRATEEK , GAURI PRATIK , DADHICH DHANRAJ
Published: July 2022

Since public blockchains are permissionless, it is subject to passive adversarial attack. In 5irechain we have addressed the security problem related to this passive adversarial activity by applying 5ireHE, a homomorphic encryption technique that encrypts the transactional details using the receiver’s public key. Since the transaction is encrypted by the receiver’s public key, it is harder for other validators to validate the transaction in 5ire. In this paper, we introduce ZKP for validating the transaction in a sense that validator can check if the sender’s previous balance and the remaining balance are in harmony with the amount of the transaction despite the difference in public keys that are used for the encryption of transaction and the encryption of account balance.
ON THE RANDOMIZED PROCESS OF TIMESLOT ALLOCATION IN 5IRECHAIN NETWORK
Authors: MATTILA VILMA , DWIVEDI PRATEEK , GAURI PRATIK , DADHICH DHANRAJ
Published: July 2022

In this paper, we study the slot allocation algorithm of 5irechain. This algorithm distributes timeslots to block assemblers. The block as- sembler that receives a certain timeslot gets the opportunity to produce a block in that timeslot. The slot allocation algorithm allocates slots to block assemblers depending upon their weights. That is the block assem- bler with higher weight gets to assemble more blocks than others and thus earns higher incentives.
THE EFFECT OF ONLINE SHOPPING FESTIVAL PROMOTION STRATEGIES ON SHOPEE CONSUMER PARTICIPATION INTENTION IN BANDUNG
Authors: GARCYA DEWI DESSHANDRA , SHARIF OSA OMAR
Published: July 2022

Changes in people's behavior that becomes fonder of shopping online are a challenge for ecommerce companies to still be able to attract the intention of their consumers in the competition. The online shopping festival is one of the promotion strategies that can be used to attract consumer participation intention in online shopping. The purpose of this study is to explore the effect caused by Shopee's online shopping festival promotion strategies on consumer participation intention with product promotion strategies of online shopping festivals consisting of the perceived temptation of price promotion, perceived fun of promotion activities, and perceived categories richness of promotion and perceived contagiousness of mass participation as the atmosphere promotion strategies using StimulusResponse Theory. This study also examines the moderating role of atmosphere promotion and control variables on consumer participation intention in online shopping festivals. PLSSEM was used to analyze data from 438 respondents and test the hypotheses. The results of this study indicate that perceived temptation of price promotion, perceived fun of promotion activities, perceived categories richness of promotion, and perceived contagiousness of mass participation have a positive and significant effect on Shopee consumer participation intention in Bandung with the influence of gender and age as control variables and perceived contagiousness of mass participation plays a moderating role on the effect of the perceived temptation of price promotion on consumer participation intention in Bandung.
A model for Real Estate Price Prediction using Multi-Level Stacking Ensemble Technique
Authors: Nnadozie Lesi , Matthias Daniel , Bennett E.O
Published: July 2022

Recent research and economic publications have shown the impact of real estate investment on the over economy of Nigeria. It is therefore crucial to employ machine learning technique to predict the price for real estate properties. Real estate price analysis and prediction will assist in establishment of real estate policies and can also be used to aid real estate property stakeholders to come up with informative decisions without bias or prejudice. Thus, it is imperative to develop a model to improve the accuracy of real estate price prediction. The goal of this research is to develop a model using a multi-level stacking ensemble technique to predict price of real estate property. The dataset utilized for the study was collected from transactions done by real estate firms in Port Harcourt and it consist of a total of 1053 rows with twelve features. The base model used includes Random Forest(RF), Extreme Gradient Boosting Algorithm(XGBoost), Light Gradient Boosting Machine(LightGBM), Decision Tree regression and ElasticNet Regression. Various combinations of the base models were stacked using StackingCVRegressor. The final model was developed by combining the best performing stacked models and evaluated using R-Square, Mean Absolute Error(MAE), Root Mean Square Error(RMSE), Mean Square Error(MSE) and Training time. The proposed model outperformed the various individual base model with R-square of 0.985203, MSE of 0.013438, RMSE of 0.115923, MAE of 0.063411 and training time of 0.599398. The result show that multi-level stacking significant improve the accuracy of a model. Again, it was observed stacking improve the performance accuracy of a model at the cost of computational time. Stacking by using blending function for the proposed model significantly reduced the computational time for training the model to 0.599398 second when compared to using StackingCVRegressor with training time of 107.054931 seconds. Therefore, multi-level stacking ensemble technique can be employed to improve the predictive accuracy of a prediction model. Future work can be done by increasing the dataset and also increasing the number of features.
Эффективность программ вспомогательных репродуктивных технологий в зависимости от полиморфных вариантов акроцентрических хромосом человека
Authors: Шишиморова М.С. , Рягузова Д.А. , Серикжан А.Д. , Тевкин С.И. , Джусубалиева Т.М.
Published: July 2022

Актуальность: Важную роль в лечении женского и мужского бесплодия различной этиологии играют вспомогательные репродуктивные технологии (ВРТ), в рамках которых, проведение молекулярно-цитогенетических исследований супружеских пар, позволяет выявить особенности генотипа, положительно коррелирующие с нарушением репродуктивной функции.  Долгое время в проводимых исследованиях не уделялось должного внимания хромосомным полиморфизмам (ХП), так как они не считались клинически значимыми. К настоящему моменту опубликованные научные данные не позволяют сделать однозначного вывода о вкладе ХП в хромосомные аномалии в период раннего онтогенеза, ввиду чего данный вопрос остается дискутабельным и актуальным.
Цель исследования – изучить влияние хромосомных полиморфизмов акроцентрических хромосом (группы D/G) в кариотипах мужчин и женщин на эффективность программ ВРТ.
Методы: Проведено контролируемое одноцентровое ретроспективное исследование эффективности программ ВРТ среди 188 бесплодных супружеских пар с полиморфными вариантами акроцентрических хромосом в кариотипе. Группы пациентов с ХП сравнивались с контрольной группой (557 пар без ХП в кариотипах) по таким критериям, как: частота нормального оплодотворения, качество эмбрионов, процент дорастания до бластоцисты, частота имплантации эмбрионов (ЧИ), частота наступления клинической беременности (ЧНБ), частота ранних потерь беременности.
Результаты: Анализ полученных результатов не показал статистически значимой разницы в количестве полученных на ТВП ооцитов, числе дробившихся эмбрионов и выходе бластоцист отличного качества в группах пациентов с ХП. Также не наблюдалось различий при сравнении частоты нормального оплодотворения и процента выхода бластоцист между группами пациентов с ХП и пациентов с нормальными кариотипами. Однако, выявлена тенденция к снижению ЧИ эмбрионов (44,4 против 49,4%), ЧНБ (54,7 против 58,9%) и увеличению частоты потерь беременности среди пар, в которых хотя бы один из партнеров является носителем ХП.
Заключение: Результаты исследования показали, что ХП группы D/G приводят к снижению эффективности программ ВРТ, негативно влияют на такие параметры, как ЧИ, ЧНБ и увеличивают ранние потери беременности. Полученные данные подтверждают важность проведения кариотипирования пациентов с целью выбора наиболее эффективного метода лечения ВРТ.
Перинатальные последствия COVID-19 (SARS-CoV-2): обзор литературы (часть II)
Authors: Жабченко И.А. , Геревич Н.В. , Кравцова Ю.А. , Сюдмак О.Р. , Коваленко Т.Н. , Бондаренко Е.Н. , Лищенко И.С.
Published: July 2022

Актуальность: В условиях продолжающейся пандемии COVID-19 появляется все больше женщин, уже перенесших это заболевание в разные сроки гестации, с разной степенью тяжести и объемом терапии в острый период, поэтому важным направлением исследований должно стать именно наблюдение за развитием плода, течением беременности и перинатальными последствиями у этого контингента пациенток. Пока таких исследований крайне мало, и они касаются только отдельных состояний – частотыпреждевременных родов и замерших беременностей, пороков развития у плодов, состояния фетоплацентарного комплекса (плацента, околоплодные воды, состояние плода и т.д.).В этом контексте не вызывает сомнений актуальность исследований влияния COVID-19 (SARS-CoV-2) на здоровье беременной женщины, внутриутробного плода и новорождённого.

Цель исследования – анализ современных данных о влиянии COVID-19 (SARS-CoV-2) на особенности состояния внутриутробного плода, возможных путей инфицирования анте-, интра- и постнатально, а также прогнозирование направлений и перспектив будущих исследований.

Материалы и методы: Для обзорабылпроведенпоиск научной литературы за последние 2 года в PubMed по следующим ключевым словам: «внутриутробный плод», «вертикальная трансмиссия COVID-19 (SARS-CoV-2)».

Результаты: Во второй части статьи изучены вероятность инфицирования и распределение случаев по степени тяжести перинатальных последствий. Рассмотрены теории патогенеза акушерских и плодовых осложнений инфекции во время беременности. Очерчен круг потенциальных дальнейших научных изысканий.

Заключение: Анализ доступных источников выявил отсутствие единой классификации болезни COVID-19 и связанных с ней осложнений у беременных и новорожденных. Поэтому важной задачей для системы здравоохранения является разработка единой национальной терминологии и классификации болезни COVID-19 при беременности.

Крайне необходимы дальнейшие исследования влияния COVID-19 на беременность. Неотложной необходимостью является создание национальных реестров случаев беременности у женщин с COVID-19, внедрение единой терминологии и алгоритмов диагностики и лечения COVID-19 и вызванных им осложнений у беременных и новорожденных.

Исследование возможных негативных последствий COVID-19и разработка соответствующих лечебно-профилактических мероприятий является, несомненно, крайне важной задачей для акушерской науки. Отдельным направлением исследований должно стать изучение состояния здоровья, течение беременности и перинатальные последствия у вакцинированных женщин.
Исходы беременности у пациенток с трубным фактором бесплодия после лапароскопического лечения
Authors: Амирбекова Ж.Т. , Аушева М.Д. , Байтемирова С.Д. , Комарова К.В. , Осипенко Д.А.
Published: July 2022

Актуальность: Частота бесплодных браков в Казахстане варьирует в пределах 15%. Это примерно 20 тысяч пар, то есть каждая шестая семья в Казахстане бесплодна. Для решения данной проблемы в 2021 году стало возможным проведение ЭКО по государственной программе «Ансаған сәби». К 2022 году количество квот по даннойпрограмме выросло до 7 тыс. Однако в случае трубного фактора бесплодия существует вероятность достичь естественной беременности после проведения малоинва-зивной хирургии.Цель исследования - анализ исходов беременности у пациенток с трубным фактором бесплодия после лапароскопического лечения.Методы: Всего в исследование были включены 190 пациенток, перенесших лапароскопию по поводу трубного фактора бесплодия в период с февраля 2018 по январь2019 гг. в отделении оперативной гинекологии Регионального акушерско-гинекологического центра (РАГЦ) г. Караганды. Пациентки были разделены на группы в зависимости от тяжести тазовых спаек, гидросальпинкса и строения фимбрий. В статье представлен анализ влияния заболеваний фаллопиевых труб на послеоперационные исходы спонтанной беременности после лапароскопиче-ского лечения.Результаты: Беременность наступила у 88 из 190 пациенток, включённых в исследование (частота наступления беременности – 46,3%). Выявлено, что спайки малого таза, гидросальпинкс и повреждение бахромокфаллопиевых труб влияют на частоту естественной беременности после операции. В 19 из 88 случаев (21,6%) была зафиксирована внематочная беременность. Перитубарные спайки и повреждение структуры фимбрий значительно увеличивали частоту послеоперационной внематочной беременности (р<0,001).Заключение: Было определено, что тазовые спайки, перитубарные спайки, гидросальпинкс и повреждение бахромок фаллопиевых труб могут влиять на исходы послеоперационной беременности и привести к отсутствиюестественной беременности после операции. Частота внематочной беременности увеличивается со степенью спаечного процесса в малом тазу и степенью повреждения бахромок фаллопиевых труб.
Muerte Descendente: Phoma spp.
Authors: Gil Vallejo Luis Fernando , Leguizamón Jairo
Published: July 2022

De esta enfermedad que ataca al cafeto, se presentan los síntomas, organismo causante, epidemiología y recomendaciones para su manejo.
Mal de hilachas o arañera: Corticium koleroga Cooke.
Authors: Castro Caicedo Bertha Lucía
Published: July 2022

De esta enfermedad foliar que ataca al cafeto se presentan los síntomas, organismo causante, epidemiología y recomendaciones para su manejo.
Mancha de hierro: Cercospora coffeicola Berkeley y Cooke.
Authors: Angel Carlos Ariel
Published: July 2022

Esta enfermedad foliar y de los frutos es causada por el hongo /Cercospora coffeicola/ y se considera de importancia en el cultivo del café por los daños que ocasiona, los cuales interfieren con el desarrollo de las plantas y generan pérdidas significativas en la producción de café, tanto en su calidad, como en la cantidad. De esta enfermedad se presentan los síntomas, organismo causante, epidemiología y recomendaciones para su manejo.
Mancha mantecosa: Colletotrichum sp.
Authors: Gil Vallejo Luis Fernando
Published: July 2022

La mancha mantecosa /Colletotrichum/ ha sido registrada en Colombia desde mediados del siglo pasado y afecta hojas, ramas y frutos de café de las variedades Típica, Caturra y Colombia. Su propagación es restringida y ocurre ocasionalmente en algunas plantas de cultivos comerciales. La importancia de esta enfermedad radica en la heredabilidad de la susceptibilidad, la cual debe conocerse para evitar su propagación masiva. En este capítulo se presentan los síntomas, organismo causante y el manejo de esta enfermedad.
Crespera
Authors: Galvis García Carlos Alberto
Published: July 2022

Este disturbio del cafeto conocido como "crespera", debe su nombre a un conjunto de síntomas observados en las plantas afectadas, las cuales no mueren pero muestran cambios fundamentales en su morfología y arquitectura, que ocasionan disminución drástica en la producción, obligando a los caficultores a realizar continuas resiembras. En este capítulo, se presentan los síntomas, organismo causante, epidemiología y manejo.