bluuebunny/crossref_metadata_2025 huggingface dataset:
Incorporating Computational Social Science in Political Science
Authors: Taraktaş Başak
Published: February 2022

This chapter discusses the challenges and opportunities of incorporating computational social science (CSS) into political science. Using an original dataset of quantitative methods courses offered at the top-40 schools, this study shows that CSS courses are currently underrepresented, but their number is likely to augment because of the competition among schools. Yet, this trend is likely to stay confined to North American and Western European schools. Also, collaboration in CSS requires reconciling research priorities in engineering and physics (prediction) and in political science (explanation). Regarding research, big data does not mitigate concerns about causation and representativeness. But simulations allow studying rare phenomena and phenomena for which experiments are not appropriate. By running thousands of experiments at various combinations of explanatory variables, simulations explore counterfactuals, assess the explanatory power of competing theories, and make forecasts.
The Virtual Persona Triad
Authors: Lima Ana Carolina Espírito Santo , de Castro Leandro Nunes
Published: February 2022

Each person projects behavioral patterns through actions. Even in a virtual environment we express our way of seeing, feeling, and reacting to the world. The analysis of the data generated allows the identification of pattern behaviors associated with users. Therefore, it is possible to obtain a better understanding of the user, the image he/she decided to express, and how he/she behaves in social media, which we name here the virtual persona. Machine learning techniques make it possible to develop a framework that allows to infer psychological and behavioral aspects of the virtual persona. The goal of this chapter is to introduce the virtual persona concept as a mechanism to understand social media users. Emphasis is given to the self-presentation of virtual persona, the perception of physical persona over virtual persona, and the description of three computational frameworks to study virtual persona, what we call here the virtual persona triad.
The Flow of Influence From Two-Step to Network Perspectives
Authors: Abanoz Enes
Published: February 2022

The two-step flow of communication by Paul Lazarsfeld and Elihu Katz is one of the curial theories in the communication science field. The theory focused on the mass media message flow in society and showed that message flowed from opinion leaders to other individuals. Although the study is a groundbreaking masterpiece in its time, significant developments in the mathematical models of contagion theory, simulation technique, empirical data, and digital technologies necessitate a revision of the theory. This chapter focuses on how computational methods can apply to the two-step flow of communication theory and how computational approaches can handle the less valued or non-evaluable dimensions.
Presence of Leptospira sp. and leptospirosis risk factor analysis in Boyolali district, Indonesia
Authors: Setyaningsih Yuliani , Kartini Apoina , Bahtiar Nurdin , Kartini Apoina , Pradigdo Siti Fatimah , Saraswati Lintang
Published: February 2022

Background: Leptospirosis is a health problem that causes death in Indonesia. In 2017, Boyolali District was reported that the number of leptospirosis cases reached 40.62 per 100,000 population with a CFR of 23.52%. The determination of risk factors and Leptospira bacteria's presence in the body of water plays an essential role in the transmission of leptospirosis.Design and methods: This study aims to determine the risk factors and Leptospira bacteria's presence in water bodies in Boyolali District. This research is descriptive research with a survey method using a cross-sectional design and an analytical study using an observational method with a case-control approach. The sample was 100 water samples from wells, rivers, and paddy fields in endemic and non-endemic areas of leptospirosis. This study's population was 34 people with leptospirosis in Boyolali Regency in January 2017 - August 2018.Results: There was a significant relationship between leptospirosis incidence in the Boyolali Regency with garbage, the pet presence, a history of injuries, and field activity. Leptospira bacteria are found in rivers (18.18%) and rice fields (6.67%), while in sub-districts with cases occur almost every year. Leptospira are found in wells (18.18%) and rice fields (6.67%).Conclusions: People should pay more attention to home sanitation and the surrounding environment to avoid leptospirosis.
Il dibattito nella bioetica
Authors: Serra Angelo
Published: February 2022

Non disponibile
Entrepreneurial orientation on business performance for small, micro and medium enterprises in the telecommunications industry: A management perspective
Authors: Magocha Medicine
Published: February 2022

Entrepreneurship is playing a mediating role in ensuring that the impact of climate and technological changes are regulated and made adaptable and adoptable for humanity through entrepreneurial innovations. In this article, a critical discourse analysis is conducted to establish the facts regarding the influential relationships affecting entrepreneurial orientation (EO) and business productivity for small, micro and medium enterprises (SMMEs) in the information and communications industry in Zimbabwe. An exploratory quantitative methodology using a positivist approach was applied to reinforce the independence of the researcher and to eliminate bias in the exploration of the orientations. Data were collected from 308 entrepreneurial entities located in different parts of the Harare urban zones, which were randomly sampled. One of the major findings of this research points conspicuously to the inevitability of EOs. Accordingly, it is recommended that enterprise regulators, legislators and the state should emphasise the inclusion of EO in the existing body of knowledge, and support telecommunications business practitioners to make significant decisions on strategic risk management when conducting strategic formulation and implementation.
Occupational Therapy Department's Engagement in the Organizational Management of Coronavirus Disease-2019 Pandemic in an Acute Care Setup
Authors: Nadkarni Karuna Vishal , Sarang Sushant Deepak , Kasar Usha Uday , Gokhale Preetee Sanjay , Palsule Shilpshree Prashant , Mishra Sapna Vishwadeepak , Jain Vaijanti Vaibhav , Phadke Saurabh Shrirang , Pawar Neeta Sharad , Nandgaonkar Hemant Parshuram
Published: February 2022

Background:

Coronavirus disease-2019 (COVID-19) pandemic came as a big challenge to the medical fraternity. The novelty of its manifestation made it clear that occupational therapy (OT) professionals would require to adapt to the ever-changing scenario of the pandemic and engage in newer roles to combat the pandemic.

Objective:

The objective of the study was to provide descriptive narration of the process of engagement of the OT department in handling the COVID-19 pandemic at an acute care setup.

Study Design:

A perspective from a clinical experience and a narrative review.

Methods:

Narrative account of the initiatives, challenges, preparations, and outcomes of the measures taken by the King Edward VII Memorial Hospital's (KEMH) OT Department's professionals as part of a multidisciplinary team member in combating the COVID-19 pandemic is reported. The occupational therapist at KEMH used core OT principles and teachings in treatment sessions and managerial functions to aid patients and the organization during the pandemic.

Results:

The measures taken by the OT department professionals at KEMH helped facilitate the management of the COVID-19 pandemic at the hospital. Being well-versed with the organization's style of functioning and philosophy enabled the OT department to work as part of a multidisciplinary team. The active participation of occupational therapists underlined their role in acute respiratory conditions. It helped OT be a part of the critical management of COVID-19 patients admitted in the hospital and at the Jumbo care centers developed by the hospital team of experts.

Conclusion:

The COVID-19 pandemic allowed OT professionals to create new processes and enhance service delivery through innovative actions in an acute care setup.
High-Grade Esophageal Neuroendocrine Neoplasm with Waxing and Waning Disease Course and Differential Response to Chemotherapy
Authors: Sitani Keerti , Basu Sandip
Published: February 2022

Esophageal neuroendocrine neoplasms (NENs) are uncommon type of esophageal malignancies. We describe the clinical course and molecular imaging features of the relatively rare esophageal malignancy (an aggressive poorly differentiated NEN) that was widely metastatic at the initial presentation. The patient underwent multiple cycles of chemotherapeutic regimens, employing cisplatin-etoposide and nanopaclitaxel-carboplatin and later on rechallenge with cisplatin-etoposide. There was observation of fluctuating disease course and differential characteristics of tumor lesions in terms of treatment response and recurrences with multiple cycles of chemotherapy. In view of the histopathology of high Mib-1 labeling index and dual tracer positron emission tomography-computed tomography (PET-CT) (flurodeoxyglucose [FDG] and 68Ga-DOTATATE) features, the patient was not a suitable candidate for 177Lu-DOTATATE PRRT and FDG PET-CT was the preferred imaging modality for both treatment response assessment and disease monitoring in this patient. The varying response among metastatic lesions in the same individual (with one lesion showing partial response and the other one demonstrating disease progression) was an additional noteworthy feature of the case.
CyberKnife robotic-assisted stereotactic radiosurgery for iridociliary melanoma
Authors: Ortiz-Morales Gustavo , Parra-Bernal Cinthya , Dominguez-Varela Irving , Gonzalez-Godinez Sara , Aguilera-Partida Jorge , Ancona-Lezama David
Published: February 2022

Iridociliary melanoma represents a rare and aggressive variant of intraocular melanoma. We report the case of a 30-year-old male with iridociliary melanoma that started as a uveitis masquerade syndrome. Noninvasive, stereotactic radiosurgery with CyberKnife® at a dose of 27 Gy to the 90% isodose line was promptly performed. Six months after treatment, no postoperative complications were observed. The patient achieved local tumor control, maintained a 20/20 visual acuity, and no signs of systemic metastasis were observed. The versatility and outpatient nature of CyberKnife® make it an option to consider for the multidisciplinary management of these patients.
On the correction to Einstein’s formula for the effective viscosity
Authors: Gérard-Varet David , Mecherbet Amina
Published: February 2022

This paper is a follow-up to Gérard-Varet and Hillairet (2020) on the derivation of accurate effective models for viscous dilute suspensions. The goal is to identify an effective Stokes equation providing an

o(\lambda^2)

approximation of the exact fluid–particle system, with

\lambda

the solid volume fraction of the particles. This means that we look for an improvement of Einstein’s formula for the effective viscosity in the form

\mu_{\mathrm{eff}}(x) = \mu + \frac{5}{2} \mu \rho(x) \lambda + \mu_2(x) \lambda^2

. Under a separation assumption on the particles, we proved in the article above that

if an

o(\lambda^2)

Stokes effective approximation exists

, the correction

\mu_2

is necessarily given by a mean field limit, which can then be studied and computed under further assumptions on the particle configurations. Roughly, we go here from the conditional result of the article above to an unconditional result: we show that such an

o(\lambda^2)

Stokes approximation indeed exists, as soon as the mean field limit exists. This includes the case of periodic and random stationary particle configurations.
High degeneracy of effective Hamiltonian in two dimensions
Authors: Yu Yifeng
Published: February 2022

Consider the effective Hamiltonian

\overline{H}(p)

associated with the mechanical Hamiltonian

H(p,x)=\frac12|p|^2+V(x)

. We prove that for generic

V

,

\overline{H}

is piecewise one-dimensional in a dense open set in two dimensions using Aubry–Mather theory.
Evaluation of Yield and Nutritional Composition of Oyster Mushroom (Pleurotus ostreatus) Grown on Different Substrates
Authors: Olujobi O.J. , Adeniji E. A.
Published: February 2022

This study examined the yield and nutritional composition of oyster mushroom (Pleurotus ostreatus) grown on different substrates. The experiment consisted of six treatments viz: Sawdust, Coconut-husk, Maize-cob, Maize-cob + Sawdust, Coconut-husk + Maize-cob and Sawdust + Coconut-husk. Each substrate was moistened and left for 12 hours. Thereafter, 1 % CaCO3 and 5 % wheat bran were added to 600g of each substrate. The substrates were divided into three of 200g each. The replicates were placed inside polythene bags of size 15 x 35 and steam sterilized at 121ºC for 20 minutes in an autoclave. Sterilized substrates were inoculated with Pleurotus spawn inside the polythene bag and then air-tight sealed with a rubber band. The substrates were kept in the darkroom at 25 ºC to ramify. The ramified substrates were kept moist for the mushroom to sprout. The result revealed that mushroom produce on sawdust substrate gave the highest yield on a fresh weight basis (16.67 ±1.20g). While sawdust + coconut-husk performed best in terms of nutritional composition with 14.00 % ash, 2.63 % protein, 42.87 % carbohydrates, 2.70 % calcium, and 650 %phosphorus. In conclusion, the uantity of mushroom produced was highest in sawdust while sawdust with coconut-husk produced mushroom ith the highest nutritional quality. The study recommends sawdust for commercial production of oyster mushroom and sawdust + coconut-husk for optimum nutritional benefits.
Performance and Microstructural Evaluation of Asphalt Concrete Produced with Hydrated Lime, Glass Powder and Cement Modifiers
Authors: Olukanni E.O. , Oyedepo O.J. , Ajani A.M.
Published: February 2022

The increasing axle load arising from the growth in vehicular volume reduces the durability of road pavement, hence the need to further strengthen the road pavement. This research focuses on the determination of the performance of asphalt concrete in relation to the microstructural characteristics of the asphaltic concrete produced with hydrated lime, glass powder and ordinary Portland cement as modifiers. Asphalt Concrete (AC) mixes were prepared with Dangote 3X cement (D3C), Lafarge Superset cement (LSC), hydrated lime (HL) and glass powder (GP) in varying proportions of 20, 40, 60, 80 and 100%. The stability and morphology of the asphalt concrete produced were determined using Marshall stability test and scanning electron microscopy respectively. AC containing GP and HL showed maximum stability of 3.61 kN and 4.01 kN respectively. The maximum stability values obtained for the samples containing D3C and LSC as fillers are 4.21 kN and 5.10 kN respectively; these stability values meet the minimum Marshall Design criteria of the Asphalt Institute. The microstructural analysis of the asphalt concrete samples showed that GP has the lowest maximum pore value of 4.39 µm2 in which the inter-particulate spaces in the AC produced with GP are small and the agglomeration of the particles indicated that they are densely packed and are characterized with good strength.
La metáfora esponsal y la caracterización de Jesús en el cuarto evangelio
Authors: Garzón Moreno Miguel Ángel , Pereira Delgado Álvaro
Published: February 2022

En el cuarto evangelio, la caracterización mesiánica de Jesús como el esposo lo diferencia de Juan el Bautista, que es solo —y nada menos que— “el amigo del esposo”. Además, la trasferencia de los rasgos esponsales que Yahvé tenía en el Antiguo Testamento a Jesús invita a pensar en una “cristología alta”. En la presente investigación, tras describir someramente el uso de la simbología nupcial en el Antiguo Testamento y en las tradiciones jesuánicas de la Iglesia naciente, estudiaremos diversos textos del cuarto evangelio (Jn 1,26-27; 2,1-11; 3,22-30; 4,4-42; 12,1-11; 20,1.11-18) en los que la metáfora nupcial es empleada con diferentes matices. Iremos describiendo el diálogo intertextual que se genera en estos pasajes entre el modelo bíblico del que se parte y la apropiación creativa del evangelista. Concluiremos con algunas consecuencias para el quehacer de la cristología hoy a partir de la caracterización de Jesús como el Mesías esposo.
“Nos edificó y admiró a todos aquellos que tuvimos la dicha de presenciar tan fausta consagración”. El cardenal Eustaquio Ilundain y la dedicación de la catedral en la Sevilla republicana de 1932.
Authors: Gámez Martín José
Published: February 2022

El Cardenal Ilundain consagró la catedral de Sevilla el 30 de octubre de 1932 en un difícil año para las relaciones entre la Iglesia y el Estado, motivado por el gobierno de la Segunda República. La ceremonia de dedicación no se había realizado desde el estreno del nuevo recinto catedralicio a primeros del siglo xvi. Se estudia el contexto y la rica liturgia, ofreciendo otros aspectos del pontificado del arzobispo de Sevilla como su nombramiento de cardenal en 1925.
Understanding platform businesses in the food ecosystem
Authors: Hart Lucy
Published: February 2022

The Food Standards Agency (FSA) is responsible for public health in relation to food in England, Wales and Northern Ireland. It makes sure that people can trust that the food they buy and eat is safe and is what it says it is. As part of this responsibility, the FSA works to understand the continuing evolution of the food landscape to identify opportunities to improve standards of food safety and/or authenticity. As well as any new or magnified risks from which consumers should be protected. One area that has evolved rapidly is that of digital platforms in the food and drink industry. Consumers are increasingly purchasing food via third party intermediaries, known as ‘aggregators’, from a range of vendors. Digital platforms remain a relatively new concept, with many launching in the past decade. As such, there has been a knowledge gap in government about how these platforms work and how they impact the landscape in which they operate.
DETECTION OF MICROPLASTIC RESIDUES- DEVELOPING A METHOD FOR PHTALATES IN HONEY
Authors: Kartalovic Brankica , Vranešević Jelena , Petrović Jelena , Đurđević Biljana , Ratajac Radomir
Published: February 2022

In this pilot study, a method for the determination of phthalates in honey was developed. The following phthalates are included: diethyl phthalate, di-isobutyl phthalate, di-n-butyl phthalate, bis (2-Ethylhexyl) phthalate, and di- (n-octyl) phthalate. For the preparation of the samples, the method of liquid-liquid extraction with hexane with an ultrasonic bath was used. The analysis of the prepared samples was performed using gas chromatography and a mass detector. The method is reliable, sensitive, and reproducible with a detection limit of 0.28 - 1.38 ug/kg. This paper presents the results of testing samples of honey stored in glass and plastic packaging for three years in order to determine the migration of phthalates. Dimethyl phthalate was not found in the tested samples. Diethyl phthalate in glass samples from glass packaging was below the LOQ, and it ranged from 2.1 to 4.11 µg / kg in the samples of honey in plastic packaging. The values of di-isobutyl phthalate, di-n-butyl phthalate and bis (2-ethylhexyl) phthalate ranged between 5.32 and 22.60 µg / kg respectively;1.32 – 27.80 µg/kg; 4.45-19.19 µg/kg; di-(n-octyl) phthalate and di-methyl phthalate were < LOQ
Effect of Rubric-Based Feedback on the Writing Skills of High School Graders
Authors: Hasan Ali Alsagheer Abdelal
Published: February 2022

This study aimed at exploring the impact of utilizing rubric based feedback on developing the EFL writing skills of Saudi high school students. This study recruited 65 students of the second semester of high school students during the academic year 2019. The experimental group consisted of 31 students, who utilized the rubric based feedback during their writing instruction, while the control group comprised 34 students, who were taught in a traditional way in the classroom. Paired t-test revealed that there was a significant difference between mean scores of both the experimental and control group participants favoring the experimental group participants; confirming the positive impact of utilizing rubric based feedback on developing Saudi high school students' writing skills. These findings have provided evidence that the rubric based feedback has effectiveness in developing the writing skills of Saudi high school students
The Transferability Level of Junior High School Students in Solving Geometry Problems
Authors: Agustin Anisa , Retnowati Endah , Ng Khar Thoe
Published: February 2022

Transferability indicates that learners are able to use their knowledge to solve advanced problems. This study aimed to elaborate in detail the level of transferability both near andÂ  far transferability of junior high school students in solving geometry problems, and to reveal some factors causing errors in doing the transfer test. Geometry in this study covered solid prism and pyramid. This qualitative descriptive study involved as many as 157 Grade VIII students in one of the junior high schools in Sleman Regency, Indonesia. The data were collected through a written test taken by all participants and interviews with 16 students selected based on the category of the transfer test results. This results of the study showed that (1) based on the average test scores, all students acquired fair transferability, (2) based on the near transfer test item, all students could be categorized as having high transferability, (3) based on the far transfer test items, all students could be categorized as having low transferability, (4) The factors that caused student errors were: (i) difficulties in showing information of what is known in the given context of the transfer problem; (ii) difficulties in stating what is asked in the given problems; (iii) difficulties in using conceptual, procedural, and technical knowledge in executing the strategy of solution; (iv) difficulties in drawing correct conclusions. This result of this study have raised concerns regarding the importance of learning strategy that facilitate transferability.
Clinical Evaluation Of Ashmarihar Kasaya In The Management Of Urolitiasis (Mutrashmari)
Authors: Ranga Vinod , Ranga Sneh
Published: February 2022

Urolithiasis is the most common urinary tract problem affecting people globally. Efforts have been made continuously since past, for a safe & effective treatment for this alarming disease. The best and latest modern treatment for this disease is invasive surgery which requires hospital stay, pain and post-operative complications. In this context an Ayurvedic classical formula Ashmarihar Kasaya (Siddhayoga SamgrahaCh.18) is described as an effective drug in management of urolithiasis (mutrashmari). So a study was performed on account of above statement. The result was assessed by using a series of parameter and it was found that Ashmarihar Kasayais highly significant in relieving most of the signs & symptoms. Also, the drug is found effective in removal of small (≤ 5mm) stones and reduce the size of big (6-10mm) stones present in ureter, bladder and kidney.
QUEMADURAS TÉRMICAS POST-TRATAMIENTO DE LUZ PULSADA INTENSA EN CARA DE PACIENTE EN PIEL FOTOTIPO V. ENERO 2021. CASE REPORT
Authors: Cordero Monferrer Celia Yamila , Araúz Villarrial Keyla Victoria
Published: February 2022

La IPL es un dispositivo tecnológico de uso frecuente dermatológico, el cual funciona como método terapéutico en pieles claras y oscuras con parámetros específicos que requieren longitudes de ondas y pulsos adecuados al fototipo de piel a tratar, el no proceder de la forma adecuada puede incurrir en un desenlace clínico adverso en el paciente. Se realiza un estudio de tipo cualitativo, descriptivo e inductivo, de un caso clínico, sobre paciente del sexo femenino, de 49 años de edad, a la cual se le clasifica su piel como fototipo V, con antecedentes de Dermatitis Cenicienta, tratada por melasma, a la que se le diagnostica una hipertención arterial 24 horas después de presentar evidentes lesiones de quemaduras en pómulos, luego de su segunda dosis de tratamiento con Luz Pulsada Intensa (IPL). Este caso clínico evidencia que se debe tener en cuenta los antecedentes patológicos personales del paciente y realizarle un correcto examen físico a fin de garantizar un resultado estético exitoso y evitar las posibles complicaciones que se pueden derivar por la utilización de IPL, ya sea por estado desfavorable de piel o comorbilidades, así como por el uso incorrecto del dispositivo en pacientes a los que no estaría indicado su aplicación.
Efectos de la Vacunación Musical sobre las constantes vitales y el estado de ánimo en pacientes hospitalizados con SARS-CoV-2
Authors: Tapizquent Colmenares María José , Sánchez José Agustín
Published: February 2022

Se evaluó el efecto de la Vacunación Musical sobre las constantes vitales y el estado de ánimo en pacientes hospitalizados con SARS-CoV-2 de un centro asistencial del estado Carabobo Venezuela. Se estudió una muestra de 7 personas de una población de 10 a los que se les midieron las siguientes constantes vitales: frecuencia cardíaca (FC), frecuencia respiratoria (FR), presión sistólica (PS) y saturación de oxígeno (SO). También se tomó registro del estado de alegría, esperanza, gratitud, miedo, ansiedad y tristeza autoinformados. Las medianas de la FC, la FF y la PS, tuvieron cambios significativos y favorables durante la Vacuna Musical que se mantuvieron 15 minutos luego de ésta; además, la Vacuna Musical disminuyó los niveles de miedo, ansiedad y tristeza e incrementó los niveles de alegría, esperanza y gratitud autoinformados. Según los resultados observados en este estudio, resulta adecuado considerar la Vacuna Musical como estrategia complementaria para el abordaje del SARS-CoV-2.
Desarrollo de un sistema de gestión de la información del entrenamiento deportivo de los judocas
Authors: Escalona Osmel José , Ruíz Labranderas de Armas Leandro , Mora Batista Camilo
Published: February 2022

En la cátedra de judo de la Escuela de Iniciación Deportiva Escolar (EIDE) de Holguín se maneja una gran cantidad de información. Cada vez que se realizan las pruebas pedagógicas, los resultados de los judocas son almacenados en formato físico. Como consecuencia, la información en muchas ocasiones se pierde e imposibilita su generalización en eventos científicos que se desarrollan en el área deportiva. La presente investigación aborda el proceso de diseño y desarrollo de un sistema informático que permita realizar una evaluación más fiable y completa de las pruebas pedagógicas. Para su desarrollo se utilizaron herramientas y tecnologías libres, entre las cuales se encuentran el lenguaje de programación Java, los marcos de trabajo JavaFX e Hibernate, el gestor de bases de datos PostgreSQL y la metodología para el desarrollo de software Extreme Programming. Como resultado de la investigación se obtiene un producto informático que favorecería el proceso de evaluación de las pruebas pedagógicas.
Prototipo de sistema de alerta temprana de posibles desastres de inundaciones Águila Harpía
Authors: Espinosa Gómez Emilio , Soto Urdaneta Jaime , Cedeño Yaritza Marlena , Will Yau José , Otero Rodríguez Lisbeth , Chávez Norman , Ramos Sánchez Erick
Published: February 2022

En medio de una crisis mundial por el cambio climático y como una respuesta lógica de los estudiantes y docentes de una universidad particular a los problemas sociales, surge el prototipo de sistema “Águila Harpía”, como un ejercicio de la puesta en práctica de los conocimientos, habilidades y competencias adquiridas en la Universidad Internacional de Ciencia y Tecnología (UNICyT) de Panamá y como respuesta al “Desafío de innovación para la reducción de riesgos de desastres”, auspiciado por el Centro de Coordinación para la Prevención de los Desastres en Centro América y Republica. Dominicana (CEPREDENAC), el objetivo general fue desarrollar un prototipo funcional de sistema, que permita una alternativa atractiva para minimizar los riesgos por desastres ocasionados por inundaciones, de forma eficiente, eficaz, confiable, replicable, escalable, considerando la participación de la comunidad. La metodología de esta investigación aplicada, se basó en la integración de tecnologías telemáticas, como la red social Twitter, mediante el desarrollo de interfaces basadas en Python con otros recursos basados en la Computación en la Nube, para brindar un prototipo de sistema, como alternativa de solución a la problemática planteada. Las pruebas realizadas con el prototipo permitieron comprobar el funcionamiento eficiente del prototipo y, como el trabajo en equipo de miembros de la academia y las tecnologías emergentes pueden contribuir a minimizar los riesgos por desastres naturales, y particularmente los ocasionados por las inundaciones, que son los más frecuentes en zonas densamente pobladas por las personas con mayores necesidades. Es el caso del Distrito San Miguelito. en la Ciudad de Panamá, en Panamá.
PRINCIPALES DIFICULTADES EN EL APRENDIZAJE DE LAS MATEMATICAS EN ESTUDIANTES DE NIVEL MEDIO SUPERIOR
Authors: Silva Carmona Victoria , Barrios Sánchez Jorge Manuel
Published: February 2022

El presente trabajo de investigación tiene como objetivo analizar las principales dificultades que enfrentan estudiantes del nivel medio superior en su aprendizaje matemático, por medio de actividades que nos indiquen los errores más comunes que enfrentan los estudiantes en la institución educativa en la preparatoria Federal por cooperación Lázaro Cárdenas, ubicada en Prolongación 5 de mayo de la ciudad de Yuriria- Guanajuato-México. La investigación se desarrolló bajo un enfoque cuantitativo, con una muestra poblacional de 15 estudiantes, debido al sistema hibrido que se cumple en la actualidad en las instituciones educativas de la región por la Pandemia ocasionada por el COVID 19. La recolección de datos fue obtenida por medio de un examen práctico en el que se evalúa la capacidad para resolver los ejercicios y los diversos errores que muestran en la misma resolución, mediante ejercicios matemáticos. La construcción del examen se realizó mediante una investigación exhaustiva del marco teórico y estado del arte del tema, mismos que fueron evaluados por diferentes académicos de la institución educativa, se obtiene los resultados de examen práctico y en base a los resultados se determinan cuáles son las principales dificultades que los estudiantes en el área matemática. Los resultados de la investigación muestran que los estudiantes tienen los conocimientos básicos para la resolución de ejercicios matemáticos, pero asimismo muestran deficiencia para la elaboración y resolución de problemas más complejos.
Radiographic evaluation of the margins of clinically acceptable metal-ceramic crowns
Authors: Sheikh Bilal Badar  , Kamil Zafar  , Robia Ghafoor  , Farhan Raza Khan
Published: February 2022

Objective: To radiographically evaluate the proximal marginal fit of the clinically acceptable metal-ceramic crowns.Method: The prospective study was conducted at the dental clinics of Aga Khan University, Karachi, from July toDecember 2018, and comprised metal-ceramic crowns that were evaluated prior to the cementation. Clinicalexaminations were conducted by seating the crown on the tooth preparation and visual assessment was done usingsharp explorer along the margins. Clinically acceptable crowns were then evaluated on the bite-wing radiograph.Any horizontal or vertical inaccuracy of >0.5mm at the proximal margins was recorded as 'discrepancy'. Data wasanalysed using SPSS 22.Results: Of the 230 interproximal margins of 115 crowns evaluated, 113(49.1%) sites had marginal discrepancies;44(19.1%) horizontal discrepancies, 58(25.2%) vertical discrepancies, and 11(4.8%) having both horizontal andvertical discrepancies. Horizontal crown margin discrepancies were most associated with the mesial site of themaxillary crowns, while vertical discrepancies were commonly associated with the distal aspect of all crowns(p<0.050).Conclusions: Almost half of the crowns that were considered clinically acceptable had some vertical or horizontalmarginal discrepancy on radiographic evaluation.

Continuous...
Analisis Strategi Pemasaran Usaha Mikro Kecil dan Menengah (UMKM) pada Era Digital di Kota Medan
Authors: Ariza Rizky Ananda , Aslami Nuri
Published: February 2022

Because of the rise of technology and increased business competition, SMEs must have a strong and well-defined marketing plan in order to succeed. The goal of this study is to look at how marketing strategies are implemented in SMEs in order to compete in the digital age. The researchers used a qualitative technique in this study, conducting structured interviews with the owners or top management of SMEs, with a total sample size of 31 respondents. The findings of this study revealed that the culinary, fashion, and tour and travel industries use added value and differentiation strategies for their products and services, as well as a competitive pricing approach. In the trading industry, on the other hand, they are more likely to employ a price strategy to compete in the market and to select a niche market to develop their target market.

Keywoard : Marketing Strategy, Marketing Mix, SMEs, Medan
Green supply chain management practices: direct effects sustainability performance
Authors: Rizki Adam Firman , Augustine Yvonne
Published: February 2022

Purpose research to determine about effect Green Supply Chain Management to Sustainability Performance from manufacturing companies in Indonesia. This quantitative study was conducted on 222 manufacturing companies in Indonesia, consisting of 148 manufacturing companies registered with IDX and 74 non-IDX manufacturing companies. The findings showed that ten hypotheses are green purchasing, green manufacturing, green marketing, and also internal environment has no effect to sustainability performance. While Green Distribution, Eco Design, environmental education, Investment Recovery, Customer cooperation, and Green Information system have positive and significant impacts to Sustainability Performance. The originality of this research is the addition of measurement indicators on sustainability performance from ISO 26.000, Indonesia regulation from Environment and Forestry Minister number: P.75/MENLHK/SETJEN/KUM.1/102019 regarding roadmap and waste reduction by many producers.
An Exploratory Study of Indonesian Teachers’ Digital Literacy Competences
Authors: Soepriyanti Henny , Waluyo Untung , Sujana I Made , Fitriana Eka
Published: February 2022

This study aims to reveal how high school teachers adjust to the demand of utilizing digital literacy skills in two selected areas of the Lombok Island, Indonesia. The study sought to get deep understanding of how high school teachers developed their digital literacy competences and kept up with the demand of online teaching of English during the pandemic time. The study also sought to identify problems pertaining to the utilization of digital literacy in the pandemic time. The study employed a qualitative method with multiple-case design. A purposive Sampling technique was used to determine the key informants for the study. The data were obtained from various sources, which included interviews, observations and document studies. The process of data analysis encompassed data reduction, data presentation, and conclusion drawing. This was done through triangulation of data iteratively. The data were then analyzed thematically. The study yields that teachers in the two selected research areas acquired varying degrees of digital literacy competences due to different goal-setting, interests, knowledge and skills. A number of problems pertaining to teachers’ differing competences in digital literacy were identified, i.e. (1) lack of internet access (2) the absence of professional development, (3) and institutional support system. All of these problems were intertwined in nature. The study concludes that a professional development program needs to be devised for the participants to improve their performance and competence in utilizing digital literacy.
Women's Leadership via Digital Technology and Entrepreneurship in business and society
Authors: Karyotaki Maria , Bakola Lizeta , Drigas Athanasios , Skianis Charalabos
Published: February 2022

Gender equality and digital development are inextricably linked. On the other hand digital skills are in increased demand due to the digital skill gap expanding. Most of the tech nation’s reports have shown that men still outweigh women by 3 to 1. This study aims to expound the relationship between digital technology and women’s leadership in business and society and try to clarify the reasons that women fall short of the demands of the digital sector as it is increasingly growing.
A Novel Deep Learning Approach for Detection of Pneumonia from Chest X-Rays
Authors: Yuan Andrew
Published: February 2022

Current machine learning models for pneumonia detection perform poorly compared to those for other diseases. I aim to use a novel approach to build a model that can improve on performance and be applicable to other diseases.

My approach uses multi-tier neural networks instead of using single convolutional neural networks (CNNs) like what other researchers have done. My multi-tier model consists of three tier-1 Neural Networks (NNs) and one tier-2 NN. For the tier-1 NN, I use 3 selected ImageNet-trained CNNs (ResNet152V2, DenseNet201, and NASNet Hub) as the starting bases, and train each of them via transfer learning. Then, a tier-2 NN is employed to combine the prediction results from the well-trained tier-1 NNs. The tier-2 NN model is trained with the same dataset. It produces the final predictions with substantially improved performance. The dataset used for my model is pre-processed by me, and based on a public chest X-ray dataset from the NIHCC.

My model achieved an AUC score of 76.5%, which is better than each of the tier-1 NNs alone and better than most existing models created by others.

My multi-tier approach accurately detects pneumonia from chest X-rays. It’s practical and it employs incremental learning, meaning it can be continuously improved over time. In the future, I could extend my model from binary classification to multiclass classification, apply it for lung cancer, or even other diseases.
Evaluation of physiological tests as predictors of young tree establishment and growth
Authors: Percival Glynn
Published: February 2022

High mortality rates of bare-root stock can occasionally occur post-planting due to poor plant vitality at the time of planting. Consequently, physiological tests of plant vitality, such as stem electrolyte leakage, root growth potential (RGP), and chlorophyll fluorescence, are valuable because of their ability to identify low-vigor or damaged plants that will perform poorly when planted into the landscape. The survival, growth, and foliar damage of three tree species commonly used in landscape plantings was accurately predicted by stem electrolyte leakage, RGP, and chlorophyll fluorescence 17 weeks post-planting under field conditions following freezing damage. Of the three physiological tests, correlation of field performance with stem electrolyte leakage had the highest mean r2 values, which, based on results of this investigation, was a marginally better predictor of future plant performance compared to chlorophyll fluorescence and RGP. Chlorophyll fluorescence measurements taken from woody tissue of birch (Betula spp.), a deciduous tree species, were highly predictive of subsequent survival, foliar damage, and height increment 17 weeks post-planting, indicating that chlorophyll fluorescence may have applications as a predictor of plant vitality and future growth in deciduous ornamental trees. The practical advantages and disadvantages offered by each plant vitality test to professionals involved in urban tree management are discussed.
Response of Cambial and Shoot Growth in Trees Treated with Paclobutrazol
Authors: Bai Shuju , Chaney William , Qi Yadong
Published: February 2022

Three experiments were conducted to investigate the effect of paclobutrazol on shoot and cambial growth of nine tree species located in Indiana and Louisiana, U.S. In Experiment I, white oak (Quercus alba L.) and red oak (Q. rubra L.) in Indiana were treated in April 1995 with paclobutrazol using the soil drench method. In Experiment II, paclobutrazol was applied in April 1996, using the soil injection method, to eight species growing in Indiana: white oak, red oak, sweetgum (Liquidambar styraciflua L.), black walnut (Juglans nigra L.), European black alder (Alnus glutinosa L.), yellow poplar (Liriodendron tulipifera L.), white ash (Fraxinus americana L.), and white pine (Pinus strobus L.). In Experiment III, two species, sweetgum and cherrybark oak (Q. falcata var. pagodaefolia L.) in Louisiana, were treated with paclobutrazol by the soil drench method in March 1997. At the end of the 1998 growing season, annual shoot growth and annual xylem ring increment were measured for each of the two to four growing seasons after treatment in the three experiments. The effects of paclobutrazol on cambial growth and annual shoot growth at various positions along the trunk and in the canopy varied with species and treatment duration. Paclobutrazol reduced cambial growth in white oak, red oak, cherrybark oak, sweetgum, European black alder, and white pine with the amount varying among species, vertical location in the tree, and year after treatment.
Evaluation of Elm Clones for Tolerance to Dutch Elm Disease
Authors: Townsend A.M. , Douglass L.W.
Published: February 2022

Rooted cuttings of ten hybrid elm (Ulmus) clones, including one named 'Patriot', and all derived from various crosses of 'Homestead', 'Prospector', 'Urban', and Selection 970, were established along with a randomly selected American elm clones and three disease-tolerant cultivars ('Frontier', 'Homestead', and 'Prospector') in a replicated field plot. When the rooted cuttings were 3 years old, they were inoculated with a mixed spore suspension of Ophiostoma novo-ulmi and O. ulmi, the fungi that cause Dutch elm disease. Analyses of variance and regression showed significant variation among clones in crown dieback, survival, and height growth over a 7-year time period following inoculation. The American elm clone and selection 15-87 (an 'Urban' x 'Prospector' clone) showed the most crown dieback and lowest survival rate and were among the slowest in growth rate, 7 years after inoculation. Selections and cultivars showing the least dieback and highest survival were most hybrids from parentages of 'Urban' x 'Prospector', those from 'Homestead' x 'Prospector', and 'Homestead' x 970; and cultivars 'Patriot', 'Homestead', and 'Prospector'. Many of the same disease-tolerant clones and cultivars also showed the greatest height growth after inoculation. Significant variation in disease symptoms occurred among clones from the 'Urban' x 'Prospector' cross. Results of this study emphasize the importance of selection and testing of specific clones within full-sib families.
Quantified Tree Risk Assessment Used in the Management of Amenity Trees
Authors: Ellison Michael J.
Published: February 2022

A system of tree risk assessment is proposed that expands concepts developed by others and enables a probability of significant harm to be applied to tree failure risk. By evaluating the components of a tree failure hazard and assigning to them estimates of probability, the proposed system enables the skilled tree inspector to calculate the product of those probabilities to produce a numerical estimate of risk. The use of quantification in the assessment of tree hazards enables property owners and managers to operate, as far as is reasonably practicable, to a predetermined limit of reasonable or acceptable risk.
The Use Of Chlorophyll Fluorescence To Identify Chemical And Environmental Stress In Leaf Tissue Of Three Oak (Quercus) Species
Authors: Percival Glynn
Published: February 2022

During their lifetime, urban trees are susceptible to a range of environmental and chemical stresses that can result in tree decline. Chlorophyll fluorescence has been used as a nondestructive and noninvasive means of quantifying damage to the leaf photosynthetic system of deciduous and evergreen trees. Aims of this investigation were to determine whether there were unique chlorophyll fluorescence profiles for different chemical (salt, herbicide) and environmental (heat) stresses in leaf tissue of three oak (Quercus) species. Results demonstrate that alterations in the OJIP curve as a measure of electron transport within the leaf plastoquinone pool of photosystem II could be used to identify tree decline due to herbicide and heat but not to salt damage. The benefits of this system to make rapid, stress-specific diagnosis in the field for professionals involved in urban tree management are discussed.
Arborists In Louisiana, U.S.: A Baseline Assessment Of Safety And Professionalism
Authors: Dozier Hallie , Machtmes Krisanna
Published: February 2022

In the mostly self-regulated arboricultural industry, Louisiana, U.S., is one of a few places where arborists must possess a license to operate. Since 1993, state-licensed arborists in Louisiana have been required to attend at least one continuing education workshop each year to maintain their licenses. In 2002, the State of Louisiana assumed responsibility for providing arborist continuing education, and program planners identified increasing safety and professionalism among licensed arborists as the two primary goals for the training program. The authors collected written questionnaires from 386 licensed arborists who provided baseline data on their levels of safety and professionalism and demographic information. Analysis suggested that safety and professionalism are not separate variables among respondents, but examination of categories of questions describing different aspects of safety and professionalism is revealing. Arborists self-reported good ethical practices in dealing with customers and a perception of being safe on the job, but they did not appear to be wholly familiar with current industry standards for safety and tree care. Respondents were less inclined to engage in recommended safety practices or to promote modern cultural practices to their clients. Unfamiliarity with current industry standards may be due to low participation in professional arboricultural societies among Louisiana licensed arborists and a tendency to attend the only the minimally required number of state-mandated educational events each year.