bluuebunny/crossref_metadata_2025 huggingface dataset:
Association of Social Network Use With Increased Anxiety Related to the COVID-19 Pandemic in Anesthesiology, Intensive Care, and Emergency Medicine Teams: Cross-Sectional Web-Based Survey Study (Preprint)
Authors: Clavier Thomas , Popoff Benjamin , Selim Jean , Beuzelin Marion , Roussel Melanie , Compere Vincent , Veber Benoit , Besnier Emmanuel
Published: September 2020

BACKGROUND

Critical care teams are on the front line of managing the COVID-19 pandemic, which is stressful for members of these teams.

OBJECTIVE

Our objective was to assess whether the use of social networks is associated with increased anxiety related to the COVID-19 pandemic among members of critical care teams.

METHODS

We distributed a web-based survey to physicians, residents, registered and auxiliary nurses, and nurse anesthetists providing critical care (anesthesiology, intensive care, or emergency medicine) in several French hospitals. The survey evaluated the respondents’ use of social networks, their sources of information on COVID-19, and their levels of anxiety and information regarding COVID-19 on analog scales from 0 to 10.

RESULTS

We included 641 respondents in the final analysis; 553 (86.3%) used social networks, spending a median time of 60 minutes (IQR 30-90) per day on these networks. COVID-19–related anxiety was higher in social network users than in health care workers who did not use these networks (median 6, IQR 5-8 vs median 5, IQR 3-7) in univariate (P=.02) and multivariate (P<.001) analyses, with an average anxiety increase of 10% in social network users. Anxiety was higher among health care workers using social networks to obtain information on COVID-19 than among those using other sources (median 6, IQR 5-8 vs median 6, IQR 4-7; P=.04). Social network users considered that they were less informed about COVID-19 than those who did not use social networks (median 8, IQR 7-9 vs median 7, IQR 6-8; P<.01).

CONCLUSIONS

Our results suggest that social networks contribute to increased anxiety in critical care teams. To protect their mental health, critical care professionals should consider limiting their use of these networks during the COVID-19 pandemic.
Aerobic Exercises Recommendations and Specifications for Patients with COVID-19: A Systematic Review (Preprint)
Authors: Mohamed Ayman
Published: September 2020

BACKGROUND

COVID 19 is a self limited disease, in which the strength of immunity play a key role in its management. Aerobic exercises has been documented to enhance the immunity

OBJECTIVE

This review was conducted to systematically provide aerobic exercises recommendations and specifications for patients with COVID-19.

METHODS

: a systematic search was conducted through MEDLINE (PubMed), Science Direct, Web of Science, Scopus, Bireme, Cochrane Library, and SciELO databases. The search included the following keywords immune, Aerobic training, human and immune cells.

RESULTS

Eleven studies met the inclusion and exclusion criteria of this search. The most used exercise prescriptions included: the mode included walking, cycling or running, the duration ranged from 18 to 60 min, the intensity ranged from 55% to 80% of VO2max or 60%-80% of maximum heart rate, and the frequency ranged from 1 to 3 times /week. The main increased immunological biomarkers were leukocytes, linfocytes, neutrophils, monocytes, eosinophils, IL-6, CD16-56, CD16, CD4, CD3, CD8, and CD19.

CONCLUSIONS

This review demonstrated a regular aerobic exercise consists of cycling ergometer or walking, at intensity, 55% - 80% of VO2max or 60%-80% of maximum heart rate, 2-3 sessions/week, 18-60 min/session can enhance immune functions without producing exhaustion.
Covid-19 Cases in India: A Visual Exploratory Data Analysis Model (Preprint)
Authors: S Jayesh
Published: September 2020

UNSTRUCTURED

Covid-19 outbreak was first reported in Wuhan, China. The deadly virus spread not just the disease, but fear around the globe. On January 2020, WHO declared COVID-19 as a Public Health Emergency of International Concern (PHEIC). First case of Covid-19 in India was reported on January 30, 2020. By the time, India was prepared in fighting against the virus. India has taken various measures to tackle the situation. In this paper, an exploratory data analysis of Covid-19 cases in India is carried out. Data namely number of cases, testing done, Case Fatality ratio, Number of deaths, change in visits stringency index and measures taken by the government is used for modelling and visual exploratory data analysis.
Predicting Cardiovascular Risk Using Social Media Data: Performance Evaluation of Machine-Learning Models (Preprint)
Authors: Andy Anietie U , Guntuku Sharath C , Adusumalli Srinath , Asch David A , Groeneveld Peter W , Ungar Lyle H , Merchant Raina M
Published: September 2020

BACKGROUND

Current atherosclerotic cardiovascular disease (ASCVD) predictive models have limitations; thus, efforts are underway to improve the discriminatory power of ASCVD models.

OBJECTIVE

We sought to evaluate the discriminatory power of social media posts to predict the 10-year risk for ASCVD as compared to that of pooled cohort risk equations (PCEs).

METHODS

We consented patients receiving care in an urban academic emergency department to share access to their Facebook posts and electronic medical records (EMRs). We retrieved Facebook status updates up to 5 years prior to study enrollment for all consenting patients. We identified patients (N=181) without a prior history of coronary heart disease, an ASCVD score in their EMR, and more than 200 words in their Facebook posts. Using Facebook posts from these patients, we applied a machine-learning model to predict 10-year ASCVD risk scores. Using a machine-learning model and a psycholinguistic dictionary, Linguistic Inquiry and Word Count, we evaluated if language from posts alone could predict differences in risk scores and the association of certain words with risk categories, respectively.

RESULTS

The machine-learning model predicted the 10-year ASCVD risk scores for the categories <5%, 5%-7.4%, 7.5%-9.9%, and ≥10% with area under the curve (AUC) values of 0.78, 0.57, 0.72, and 0.61, respectively. The machine-learning model distinguished between low risk (<10%) and high risk (>10%) with an AUC of 0.69. Additionally, the machine-learning model predicted the ASCVD risk score with Pearson r=0.26. Using Linguistic Inquiry and Word Count, patients with higher ASCVD scores were more likely to use words associated with sadness (r=0.32).

CONCLUSIONS

Language used on social media can provide insights about an individual’s ASCVD risk and inform approaches to risk modification.
Penyusunan Basis Data Spasial Fasilitas Bangunan Gedung bagi Penyandang Disabilitas (Universitas Gadjah Mada Menuju Kampus Inklusi)
Authors: Suharyadi R. , Hidayati Iswari Nur , Handayani Wuri
Published: September 2020

Sebagai universitas terkemuka di tanah air, Universitas Gadjah Mada harus siap menjelma sebagai kampus inklusi. Artinya, kampus yang ramah terhadap penyandang diasbilitas. Untuk menjadi kampus inklusi, maka pengelola kampus harus menyediakan fasilitas yang ramah terhadap penyandang disabilitas. Untuk itu penyusunan database spasial bangunan Gedung dengan informasi fasilitas penyandang disabilitas perlu diwujudkan. Basis data yang disusun akan bersumber dari data penginderaan jauh, dan memanfaatkan fasilitas sistem informasi geografis untuk pemanfaatan data spasial. Tujuan penelitian adalah (1) inventarisasi dan menyusun basis data bangunan gedung dan bangunan fasilitas untuk penyandang disabilitas di Kampus Universitas Gadjah Mada, (2) memberikan rekomendasi penyediaan bangunan fasilitas untuk penyandang disabilitas kampus UGM. Interpretasi visual digunakan sebagai metode untuk ekstraksi bangunan Gedung di UGM. Citra penginderaan jauh yang digunakan berupa mosaic foto udara format kecil yang dipotret dengan menggunakan wahana tanpa awak. Survey lapangan dilakukan dengan cara sensus pada seluruh bangunan Gedung di kampus UGM. Penyusunan basis data spasial menggunakan fasilitas sistem informasi geografi. Hasil penelitian berupa data base spasial bangunan Gedung dan bangunan fasilitas untuk penyandang disabilitas di kampus UGM. Atribut yang menyertadi data base tersebut antara lain aksesibilitas bagi penyandang disabilitas berupa ramp atau lift, guiding block, dan fasilitas toilet.
Analisis Faktor Yang Mempengaruhi Status Kemiskinan Rumah Tangga Pada Wilayah Central Bussiness District (CBD) di Kota Makassar
Authors: Rasyid Rusman , Agustang Andi , Agustang Andi Tenri Pada , Bastiana Bastiana , Najamuddin Najamuddin
Published: September 2020

Tulisan ini bertujuan untuk mengetahui faktor yang mempengaruhi status kemiskinan rumah tangga pada wilayah central bussiness district (CBD) di Kota Makassar melalui pengamatan, dan wawancara mendalam terhadap 98 rumah tangga miskin sebagai sampel. Metode analisis data yang digunakan dalam penelitian ini adalah analisis regresi logistik binner. Hasil penelitian ini menunjukan bahwa faktor- faktor yang secara nyata mempengaruhi status kemiskinan rumah tangga pada wilayah central bussiness district (CBD) di Kota Makassar dengan selang kepercayaan mencapai 94,9 % yaitu tingkat pendidikan, kesanggupan menyediakan bahan makanan, kesanggupan membayar biaya pengobatan, luas lantai bangunan tempat tinggal, dan tingkat pendapatan
Kelayakan Usahatani Padi dan Pengaruhnya Terhadap Pendapatan Petani di Desa Margoluwih Kecamatan Seyegan
Authors: Sudrajat Sudrajat
Published: September 2020

Kelayakan usahatani secara finansial harus menjadi perhatian yang sangat penting dalam kebijakan pembangunan pertanian.  Hal ini terjadi karena kelayakan usahatani  menentukan besarnya nilai keuntungan finansial yang diterima petani. Berdasarkan hal tersebut maka penelitian ini dilakukan dengan tujuan: pertama mengetahui kondisi sosial-demografi dan ekonomi petani padi; kedua menganalisis kondisi finansial usahatani padi yang mencakup biaya, penerimaan dan pendapatan  atau keuntungan usahatani padi;  dan ketiga menganalisis kelayakan  usahatani padi  dan pengaruhnya terhadap pendapatan petani di Desa Margoluwih Kecamatan Seyegan. Jumlah sampel sebanyak 90 petani  yang diambil secara random sampling. Data primer dikumpulkan melalui wawancara terstruktur menggunakan kuesioner, sedangkan data sekunder dikumpulkan dari instatsi pemerintah. Data disajikan dalam bentuk tabel  dan dianalisis secara deskriptif  kuantitatif. Hasil penelitian menemukan adanya variasi kondisi sosial-ekonomi dan demografi petani, sedangkan hasil analisis finansial menemukan  adanya variasi  biaya usahatani menurut luas lahan dan variasi  penerimaan atau pendapatan  menurut perbedaan hasil  produksi dan  biaya. Sementara itu, berdasarkan analisis kelayakan usahatani padi dengan  R/C ratio maupun dengan B/C ratio menunjukkan bahwa kegiatan usahatani padi masih layak dan secara signifikan nilai kelayakan tersebut berpengaruh positif  terhadap pendapatan yang diterima petani.  Financial feasibility of farming must be a very important concern in agricultural development policy.This happens because the feasibility of farming determines the value of financial benefits received by farmers. Based on this, this research was conducted with the aim to; firstly knowing the socio-demographic and economic conditions of rice farmers; the second analyzes the financial condition of rice farming  which includes the cost, revenue and income or profits from rice farming; and third, analyzing the feasibility of rice farming and its effect on farmers' income in  Margoluwih Village of Seyegan District. The total sample of 90 farmers taken by random sampling. Primary data was collected through structured interviews using a questionnaire,  while secondary data is collected from government agencies. Data is presented in tabular form and analyzed descriptively quantitatively. The results of the study found variations in the socio-economic and demographic conditions of farmers, whereas the results of financial analysis found variations in farming costs according to land area and variations in revenue or income according to differences in production results and costs. Meanwhile, based on the feasibility analysis of rice farming with R/C ratio and with the B/C ratio shows that rice farming activities are still feasible and significantly the feasibility value has a positive effect on the income received by farmers.
DEMANDA DE DINERO Y CAPTACIÓN BANCARIA EN MÉXICO
Authors: Valencia Romero Ramón , González Moya Jorge Andrés , Ríos Bolívar Humberto
Published: September 2020

Considerando las variables de actividad económica y de costo de oportunidad de mantener dinero que inciden en la demanda de dinero (M1), analizamos su efecto en la captación del sistema bancario mexicano (2006-2018). Por primera vez se introduce a M1 como determinante de la captación. El análisis emplea un modelo de vectores autorregresivos (VAR, Vector Autoregression) para evaluar la cointegración, así como modelos de corrección de errores. Concluimos que la captación bancaria no fue determinada por la variable actividad económica (el IGAE), sino por algunas variables de costo de oportunidad; sobresale el papel de M1 como determinante de la captación. Por último, obtuvimos un comportamiento estable de la captación. La estabilidad la analizamos con un modelo de cambio de régimen, e identificamos dos regímenes, alta y baja volatilidad; predomina este último.

 

MONEY DEMAND AND BANK DEPOSITS IN MEXICO

ABSTRACT

Considering that the variables economic activity and opportunity cost of holding money affect money demand (M1), their effect on deposits at the Mexican banking system is analyzed for the period 2006-2018. For the first time ever, M1 is introduced as a determinant of bank deposits. A Vector Autoregressive Model is used to assess cointegration. Error Correction Models were used. We concluded that bank deposits were not determined by the variable economic activity (IGAE), the rate of inflation nor the bank funding rate, but by some opportunity cost variables. The role of M1 stands out as a determinant of bank deposits. Finally, a stable behavior of bank deposits is obtained. Stability is analyzed using a Regime Switching-Model, two regimes are identified, high and low volatility, the latter predominates.
La época de los descubrimientos y conquistas de ultramar: término de la Historia de Portugal de Alexandre Herculano, comienzo de la Historia de México de Lucas Alamán
Authors: Ledesma Alonso Ricardo
Published: September 2020

Este artículo tiene el propósito de contribuir a la discusión crítica sobre las características genéricas de la historiografía nacional escrita en los ámbitos europeo y americano durante el siglo XIX. Como hipótesis sugiero que, a través de los componentes de su estructura narrativa, la historiografía nacional simbolizó los ideales de constitución política del  Estado-nación sustentados por sus autores. Para desarrollar esta proposición planteo un estudio comparativo de las historias nacionales de Portugal y de México compuestas, respectivamente, por Alexandre Herculano (1810-1877) y Lucas Alamán (1792-1853). El análisis del lugar narrativo de término o comienzo asignado, en cada caso, al mismo acontecimiento de las conquistas y descubrimientos de ultramar, revelará los presupuestos ideológicos implícitos en las decisiones narrativas de este par de historiadores de la nación.
Los soldados de leva durante la Guerra de Castas: filiación y composición social mediante sus juicios de amparo, 1875-1903
Authors: Villegas Pascale
Published: September 2020

Partiendo de los juicios de amparo por reclutamiento forzoso en el servicio de las armas interpuestos en el Tribunal de Campeche entre 1875 y 1903, este trabajo tiene como objetivo analizar los procedimientos judiciales y las sentencias para determinar quiénes fueron esos soldados, su origen, cómo fueron reclutados y cómo recurrieron a este medio de defensa legal para evitar formar parte de las fuerzas armadas del ejército mexicano presente en los diferentes puestos militares establecidos en la península de Yucatán para combatir a los mayas rebeldes en plena Guerra de Castas.
Arturo Aguilar Ochoa, Gaëtan Souchet D’Alvimar, filibustero y artista, sus dos visitas a México: 1808 y 1822
Authors: Milán López Juan Alfonso
Published: September 2020

Reseña sobre Arturo Aguilar Ochoa. Gaëtan Souchet D’Alvimar, filibustero y artista, sus dos visitas a México: 1808 y 1822. México: Benemérita Universidad Autónoma de Puebla, Instituto de Ciencias Sociales y Humanidades “Alfonso Vélez Pliego”, 2016.
Presentación
Authors: Ibarra González Ana Carolina
Published: September 2020

Presentación del número 59 de Estudios de Historia Moderna y Contemporánea de México en ocasión del aniversario 75 del Instituto de Investigaciones Históricas de la Universidad Nacional Autónoma de México.
La Luz de Yara: una leyenda cubana
Authors: Yero Masdeu José Manuel
Published: September 2020

Esta investigación aporta reflexiones en torno a la leyenda de La Luz de Yara, desde perspectivas históricas, ubicación territorial y mutaciones como contribución a narrativas culturales e identitarias. Surgida en torno a Yara, poblado en la actual provincia de Granma en Cuba, conserva su manifestación física, aunque no los argumentos y explicaciones sobre el motivo del surgimiento de la luz. Estos testimonios se diferencian notablemente en la primera y segunda mitad del siglo xix. Al evaluar la información histórica disponible se aprecia un marcado cambio de los argumentos en el siglo xix. En la primera mitad se relaciona con un incendio en la iglesia de Yara; en la segunda, a criterios patrióticos; y para inicios de siglo xx, con el nacimiento de la república y la necesidad de realzar los valores patrióticos del nuevo Estado-nación. Unido a estos cambios, en los argumentos sobre la manifestación de la luz, también se pondera la complejidad de las narrativas culturales de los actores sociales que han recontextualizado la leyenda en el tiempo.
Sobre el ritual, la violencia, la identidad y el aguante entre los hinchas del fútbol: estado actual de la investigación social
Authors: Castro Lozano John Alexander
Published: September 2020

Los grupos organizados de hinchas fueron visibilizados a partir de múltiples incidentes en Europa y en Iberoamérica, sucesos que se extendieron a partir de la década de 1960. En este sentido, se convirtieron en un problema de orden público para autoridades oficiales y deportivas y, además, medios de información. Igualmente, se constituyeron en un problema de investigación para antropólogos, psicólogos y sociólogos. Así, el propósito del artículo es detallar el estado actual de la investigación social relacionada con los grupos organizados de hinchas. De esta manera, las referencias fueron localizadas en bibliotecas electrónicas, investigaciones elaboradas desde distintos enfoques teóricos, conceptuales y metodológicos. Por último, la investigación social sobre los grupos organizados de hinchas se puede clasificar a partir de las nociones de violencia, identidad, ritual y un referente empírico, el aguante. Las categorías sociales y el referente empírico se han empleado para interpretar y comprender los comportamientos de los hinchas organizados grupalmente.
Patrimonio gastronómico y mujeres otomíes en el Estado de México, México: un problema de roles de género
Authors: Sánchez Valdés Arlén , Delgado-Cruz Alejandro , Gónzalez Acosta Bibiana
Published: September 2020

El objetivo del artículo es analizar el papel de las mujeres indígenas de la comunidad otomí de San Pablo Autopan, en el Estado de México, México; en la preservación del patrimonio gastronómico. A través de un estudio fenomenológico, se logra abordar la compleja relación entre los roles de género y el patrimonio gastronómico. Los resultados muestran que, a pesar de la conciencia comunitaria, el patrimonio gastronómico está en riesgo de perderse debido a los procesos de globalización, la contaminación ambiental y el cambio de roles de género en las nuevas generaciones junto con las presiones económicas. Se concluye que la preservación del patrimonio gastronómico debería ser una actividad comunitaria compartida entre hombres y mujeres en equidad de circunstancias.
Communication through coherent control of quantum channels
Authors: Abbott Alastair A. , Wechs Julian , Horsman Dominic , Mhalla Mehdi , Branciard Cyril
Published: September 2020

A completely depolarising quantum channel always outputs a fully mixed state and thus cannot transmit any information. In a recent Letter\cite{ebler18}, it was however shown that if a quantum state passes through two such channels in a quantum superposition of different orders---a setup known as the ``quantum switch''---then information can nevertheless be transmitted through the channels. Here, we show that a similar effect can be obtained when one coherently controls between sending a target system through one of two identical depolarising channels. Whereas it is tempting to attribute this effect in the quantum switch to the indefinite causal order between the channels, causal indefiniteness plays no role in this new scenario. This raises questions about its role in the corresponding effect in the quantum switch. We study this new scenario in detail and we see that, when quantum channels are controlled coherently, information about their specific implementation is accessible in the output state of the joint control-target system. This allows two different implementations of what is usually considered to be the same channel to therefore be differentiated. More generally, we find that to completely describe the action of a coherently controlled quantum channel, one needs to specify not only a description of the channel (e.g., in terms of Kraus operators), but an additional ``transformation matrix'' depending on its implementation.
O processamento cognitivo na leitura de uma prova de redação do Enem
Authors: Corbari Alcione Tereza
Published: September 2020

Este artigo tem como objetivo refletir, com base na perspectiva sociocognitiva-interacionista, sobre o processamento cognitivo da leitura de uma proposta de redação do Enem considerando os conhecimentos demandados em tal situação de interação. A partir de uma pesquisa qualitativa, propõe-se uma análise descritivo-interpretativa sob o viés do paradigma interpretativista, sustentada em revisão bibliográfica e motivada por experiências da professora-pesquisadora. Os resultados apontam que a leitura da proposta de redação envolve uma atividade sociocognitivamente complexa, que movimenta a ativação dinâmica de conhecimentos diversos (linguísticos, enciclopédico, situacional, sociocultural e interacional) imprescindíveis para a compreensão do texto.
Na aquarela do discurso: memória, metáfora e metonímia
Authors: Rosa Marilane Mendes Cascaes
Published: September 2020

Este trabalho, à luz da Análise do Discurso, mobiliza as noções teóricas memória, metáfora e metonímia. Como objeto de análise, trazemos a música Aquarela, de Toquinho. Por meio dessa materialidade discursiva, notamos o ecoar da memória, num espaço complexo de repetição e regularização, mas também de deslocamentos e conflitos. É um local movente e amplamente propício para outros dizeres. Outrossim, visualizamos a perturbação da metáfora, o (des)colorir dos sentidos para que outros possam ser pintados, numa nova trajetória onde os sentidos estilhaçam-se, num ritual que sempre pode falhar. Por outro lado, notamos a tentativa da metonímia de estabilização, de reconstrução dos sentidos, de tentar tratar da perturbação.  Observamos que memória, metáfora e metonímia se constituem, imbricam-se no jogo da língua.
Midwifery e obstetrícia: uma variação denominativa
Authors: Carvalho Yuli Souza
Published: September 2020

A área de obstetrícia possui tradições muito vinculadas à cultura de cada país. Tendo em vista esse contexto, o presente trabalho tem o objetivo de tratar da variação denominativa existente no par de línguas inglês e português em um artigo acadêmico desse âmbito. Com base no texto Counting Time in Pregnancy and Labour (DOWNE; DYKES, 2009) e na tradução feita pela autora do artigo, trataremos das traduções de termos técnicos, principalmente vinculados à área de atuação das midwives, que ilustram essas diferenças culturais na forma em que o parto ocorre na Inglaterra e no Brasil. Como resultado, foi possível observar que a escolha de traduzir ‘midwifery’ por ‘obstetrícia’, apesar de ter sido aconselhada por uma profissional da área, não foi a solução considerada mais adequada. Foi possível concluir que, em um contexto em que há discrepância entre as culturas do país-fonte e do país-alvo, seria conveniente que o tradutor escrevesse um prefácio ou nota do tradutor onde fosse explicado de que forma ocorrem essas diferenças culturais.
A ausência de um lugar enunciativo para as mulheres em O Conto da Aia: uma análise benvenistiana
Authors: Campo Louise Ariane da , Peres Carolina Alves , Boettge Suelen Aires
Published: September 2020

O presente artigo tem o intuito de apresentar uma análise enunciativa da obra O Conto da Aia de Margaret Atwood. Para isso, utilizou-se como aporte teórico-metodológico a teoria enunciativa de Émile Benveniste e, também, as reflexões acerca do sistema trinitário propostas por Dufour. O principal objetivo do trabalho é abordar a questão da falta de um lugar enunciativo para as mulheres na narrativa da obra. Para a realização da análise, levou-se em consideração as reflexões de Dufour sobre a tríade pronominal benvenistiana, principalmente no que diz respeito à noção de não-pessoa, a fim de demonstrar a falta de um lugar enunciativo para as mulheres e como elas são objetificadas de várias formas na narrativa.
Editorial Estudos Linguísticos N° 61
Authors: Monaretto Valéria Neto de Oliveira , Silva Silvana , Schwuchow Valéria
Published: September 2020

Editorial
Apresentação Estudos Linguísticos N° 61
Authors: Monaretto Valéria Neto de Oliveira , Silva Silvana , Schwuchow Valéria , Solé Alessandra , Pavan Cláudia , Nunes Ezequiel , Habel Jussara , Silva Renata Martins da , Jr. Vicente Cardoso
Published: September 2020

Apresentação
The Differences in Chemistry Learning Outcomes using Cooperative Learning Model Type Numbered Head Together with Think Pair Share on the Material of Atomic Structure and Periodic Table in Class XI SMAN 9
Authors: Rosida Yunita , Sabang Sri M. , Jura Minarni R.
Published: September 2020

This study aimed to determine the differences in the chemistry learning outcomes using cooperative learning model type Numbered Head Together with Think-Pair-Share on the material of atomic structure and periodic table in class XI SMAN 9 Palu. This type of research was a quasi-experimental research with the nonrandomized pretest-posttest design. The population in this research was 44 students of class XI IPA in SMA Negeri 9 Palu who registered in the academic year 2017/2018.  The sampling technique used was saturated sampling. The sample in this study were 22 students of class XI IPA 1 as experimental class 1 and 22 students of class XI IPA 2 as experimental class 2. The data of the research were analyzed using a one-party t-test statistic with the prerequisite test, normality test, and homogeneity. The result of data analysis obtained,  X̅1 value of chemistry learning on the students of experimental class 1 was 79.86 (SD = 7.15) whereas in the experimental class 2 students X̅2 value was 73.95 (SD = 8.26). The result of hypothesis testing was obtained t > t1 – α was 2,55 > 1.68 with a significant level (α = 0.05) and degrees of freedom = 42. This showed that Ho was rejected and Ha was accepted so that it can be concluded that there were differences in the results of chemistry learning outcomes using cooperative learning model type Numbered Head Together with Think-Pair-Share on the material of the atomic structure and the periodic table.
Influence of firms’ financial performance on disclosure of sustainability initiatives and assurance of sustainability reports
Authors: Rao Sunita , Juma Norma
Published: September 2020

This study provides a better understanding of the possible influence of firms’ financial performance on the disclosure of sustainability initiatives and assurance of sustainability reports (Perego & Kolk, 2012). The study analyzes the use of Big4 accounting, engineering, and boutique/consultancy firms for assurance of sustainability reports. A total of 2084 sustainability reports from 42 different countries were retrieved from the Global Reporting Initiative and the corresponding financial variables were obtained from the S&P Capital IQ database. Multilevel logistic regression analysis was undertaken to investigate the issue. We hypothesize that companies with higher financial performance will be more likely to choose an assurance provider from the Big4 (Carey, Simnett, & Tanewski, 2000). While we find that higher financial performers are no different from other performers (as proxied by EVA, TEV, or ROS) when it comes to Big4, we do find that engineering firms are approximately seven times more likely to be chosen as an assurance provider, after controlling for other variables (when EVA and TEV (not ROS) is used as a proxy for financial performance). Importantly, the number of employees and being in the manufacturing industry are significantly related to choosing an engineering firm as an assurance provider when EVA or TEV is used as a proxy for financial performance, and significantly related to choosing a boutique/consultancy firm when ROS is used as a proxy for financial performance.
Investigation on ash fouling formation of induced fan blade and heat exchanger surface in a 1000MW coal-fired power plant
Authors: Liu He-Xin , Xiao Jia-Fan , Tan Hou-Zhang , Wang Yi-Bin , Yang Fu-Xin
Published: September 2020

The control of fouling deposition on the main equipment has always been an im-portant issue concerned by scientific research and industrial application. How-ever, severe fouling deposits on the induced fan blade and the low temperature economiser were found in a 1000 MW coal-fired power plant with ultra-low emission. The deposit samples were collected and analysed through X-ray dif-fraction spectrometer, X-ray fluorescence, elemental analyser and SEM with en-ergy dispersive spectrometers. The result shows that the deposits are mainly composed of tschermigite (NH4)Al(SO4)2 ? 12H2O, letovicite (NH4)3H(SO4)2, cal-cium sulphate CaSO4, and quartz SiO2. The ammonium sulphate is the main component of the fouling deposits. It acts as an adhesive and makes an important contribution to the deposition. The analysis shows that the ammonia slip from denitrification system and the unreasonable temperature setting are the main reasons for fouling deposition. It is suggested that the high concentration of am-monium slip at denitrification system and the rapid condensation of the sulphuric acid mist at heat exchanger should be paid more attention in coal-fired power plants.
Numerical study of flow inhomogeneity and heat transfer enhancement in structured packed beds
Authors: Wang Jingyu , Yang Jian , Sunden Bengt , Wang Qiuwang
Published: September 2020

Packed beds are widely used in engineering applications due to their high specific surface area and good heat transfer characteristics. A grille-sphere composite packed bed is proposed previously and has been proved to have higher overall heat transfer coefficient than the simple cubic packing structure. In the present paper, the flow inhomogeneities in both the grille-sphere composite packed bed and the simple cubic packing are studied and the relationship between the flow inhomogeneity and the heat transfer characteristics is revealed by numerical simulations. The simulations are performed on ANSYS FLUENT software. The turbulence flow is modelled by the renormalization group k- model. Both dispersion of the velocity distribution and the residence time distribution are employed to assess the flow maldistribution. When the inlet velocity equals 2.17 m/s, the variance of the residence time distribution of the composite packed bed is 5.91% smaller than that of the simple cubic packing while the Nusselt number is 10.64% higher. The results indicate that less flow maldistribution can lead to heat transfer enhancement.
Heat transfer performance and friction factor of various nanofluids in a double-tube counter flow heat exchanger
Authors: Zheng Dan , Wang Jin , Pang Yu , Chen Zhanxiu , Sunden Bengt
Published: September 2020

Experimental research was conducted to reveal the effects of nanofluids on heat transfer performance in a double-tube heat exchanger. With nanoparticle weight fraction of 0.5-2.0% and Reynolds number of 4500-14500, the flow resistance and heat transfer were analyzed by using six nanofluids, i.e., CuO-water, Al2O3-water, Fe3O4-water, ZnO-water, SiC-water, SiO2-water nanofluids. Results show that SiC-water nanofluid with a weight concentration of 1.5% provides the best improvement of heat transfer performance. 1.0% CuO-water and 0.5% SiO2-water nanofluids have lower friction factors in the range of Reynolds number from 4500-14500 compared to the other nanofluids. Based on test results of heat transfer performance and flow resistance, the 1.0% CuO-water nanofluid shows a great advantage due to a relatively high heat transfer performance and a low friction factor. Finally, empirical formulae of Nusselt numbers for various nanofluids were established based on experimental data tested in the double-tube heat exchanger.
Steam system optimization of an industrial heat and power plant
Authors: Filkoski Risto , Lazarevska Ana , Mladenovska Daniela , Kitanovski Dejan
Published: September 2020

Improvement of the energy conversion processes efficiency helps to achieve a more reliable energy supply, a cleaner environment, more competitive businesses, and higher living standard. Industry data indicate significant potential for improving the efficiency of steam systems and minimizing their operating costs by implementing various measures. The present work is a result of a systematic approach for energy performance analysis and identification of opportunities for optimizing the steam-condensate system of the combined heat and power plant ESM Energetika, Skopje, North Macedonia. The boiler plants provide superheated steam used in a hot-water station for the district heating system, for electricity generation, and as process steam for industrial customers. As the main operating costs of the plant stem from the natural gas consumption, the implementation of a set of energy efficiency measures will lead to its reduction, accompanied by less environmental impact. As a result of the system analysis, a number of energy efficiency measures have been identified. For each measure, the impact on individual parts of the system, as well as on the system as a whole, is evaluated using the steam system modeller tool. This paper elaborates some of the identified measures that are considered more reliable from an operational and financial aspect, mainly focused on steam production for the district heating system. Based on a conservative approach, significant potential for savings of natural gas, electrical energy, and treated water is estimated, which will lead to annual financial savings of about 245000 Euro.
Assessment of radiative heat transfer impact on a temperature distribution inside a real industrial swirled furnace
Authors: Juric Filip , Vujanovic Milan , Zivic Marija , Holik Mario , Wang Xuebin , Duic Neven
Published: September 2020

Combustion systems will continue to share a portion in energy sectors along the cur-rent energy transition, and therefore the attention is still given to the further improvements of their energy efficiency. Modern research and development processes of combustion systems are improbable without the usage of predictive numerical tools such as CFD. The radiative heat transfer in participating media is modelled in this work with discrete transfer radiative method (DTRM) and discrete ordinates method (DOM) by finite volume discretisation, in order to predict heat transfer inside combustion chamber accurately. The DTRM trace the rays in different directions from each face of the generated mesh. At the same time, DOM is described with the angle discretisation, where for each spatial angle the radiative transport equation needs to be solved. In combination with the steady combustion model in AVL FIRE? CFD code, both models are applied for computation of temperature distribution in a real oil-fired industrial furnace for which the experimental results are available. For calculation of the absorption coefficient in both models weighted sum of grey gasses model is used. The focus of this work is to estimate radiative heat transfer with DTRM and DOM models and to validate obtained results against experimental data and calculations without radiative heat transfer, where approximately 25% higher temperatures are achieved. The validation results showed good agreement with the experimental data with a better prediction of the DOM model in the temperature trend near the furnace outlet. Both radiation modelling approaches show capability for the computation of radiative heat transfer in participating media on a complex validation case of the combustion process in oil-fired furnace.
From Editors-in-Chief
Authors: Oka Simeon , Bakic Vukman
Published: September 2020

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AAA Government and Nonprofit Section Response to the AICPA's Exposure Draft and Invitation to Comment Related to the Uniform CPA Examination
Authors: Lowensohn Suzanne L. , McAllister Brian P. , Waymire Tammy R.
Published: September 2020

During December 2019, the AICPA released Maintaining the Relevance of the Uniform CPA Examination: An Exposure Draft and Invitation to Comment based on a practice analysis conducted during 2019. Among the proposed changes to the CPA Exam, the level of governmental accounting content tested in the Financial Accounting and Reporting (FAR) section of the CPA exam would be reduced, with the potential removal of governmental accounting material altogether. The following is the comment letter submitted to the AICPA on behalf of the Government and Nonprofit (GNP) Section of the American Accounting Association.

Data Availability: Information about Maintaining the Relevance of the Uniform CPA Examination: An Exposure Draft and Invitation to Comment is available at: https://www.aicpa.org/content/dam/aicpa/becomeacpa/cpaexam/downloadabledocuments/2019-practice-analysis-report.pdf.
The Effect of Reading, Questioning and Answering Strategy toward Student Creative Thinking on Evolution Course at Biology Department FMIPA Universitas Negeri Padang
Authors: Darussyamsu Rahmawati , Fadilah Muhyiatul
Published: September 2020

Biology Department Universitas Negeri Padang students’ creative thinking competence in evolution was low. This fact assumed can be solved using RQA strategy and Molecular Evolution learning book that have developed. This research conducted to know the effect of using RQA strategy and learning book to students’ concept understanding compared with the other class that used conventional method. The samples were 46 students. Data was posttest score in evolution used creative thinking instrument that have been validated by expert and analyzed used t-test. The result showed value 0,313>0,05; it concluded that there were no significant different of students’ creative thinking competence between students at experiment class and control.
Development of Module With Concept Maps and Picture on The Diversity of Living Things Materials for Students Class VII Junior High School
Authors: Renat Selly Epriani , Novriyanti Ernie , Armen Armen
Published: September 2020

The purpose of this study produce teaching materials in the form of modules that is equipped with concept maps and images for the seventh grade students of junior high school, valid and practical. This study uses three steps of the model 4-D namely, define, design, and development. Subject 4 validators, 2 teachers, and 20 students at 26 public Junior High School in Padang. The data in this study are primary data collected from the questionnaire validity and practicalities. Results of product testing are developed, acquired valid and very practical criteria of the results by the lecturers, teachers, and students.
The Effect of Learning Model Cycle 5E Combined with Student Science Project Activities to the Skills of Science Process and Scientific Attitude of Grade XI Students of SMAN 14 Padang
Authors: Alberida Heffi , Cecilia Lani Viora , Arsih Fitri
Published: September 2020

The aim of this research was to investigate effect of 5E learning cycle model combined with science project on science-process skills and scientific attitudes. This research was based on problem of SMAN 14 Padang students whose scieence-process skills and scientific attitudes wasn’t optimally developed as a result of teacher-centered learning activity. A quasi-experimental design which was randomized control group posttest only design implemented have participants were recruited from among 3rd grade students of SMAN 14 Padang. The sample of this research had choosen by purposive sampling technique. Results of study reveal that there is significant difference between experimental and control group students’ science-process skills and scientific attitudes scores.
Development of Interactive Multimedia Based on Power Point at Fluid Preasure Material and Implementation in Life; for Junior High School Students
Authors: Wirangga Chakra , Ahda Yuni , Arsih Fitri
Published: September 2020

The purposes of this research are to produce valid and practice interactive multimedia based on PowerPoint at fluid preasure material and implementation in life for SMP/MTs.students. This research used three stages of 4-D models. The subjects of this research were 23 students class VIII SMP Negeri 3 Pariaman and 2 teachers. The object of this research was interactive multimedia based on PowerPoint at fluid preasure material and implementation in life that validated by 5 validators. Data in this research was primary data collected from validity and practicality questionnaire. The result of validity was 85,94% with criteria valid, practicality by teacher and students are practice and very practice with value 88,46% from teacher and 91,71% from students.
The Improvement of Critical Thinking Ability Students Through Inquiry Learning Model about Excretory System Class VIII in SMPN 11 Padang
Authors: ASTUTI MEZI YULIA , Alberida Heffi , Rahmi Yosi Laila
Published: September 2020

Critical thinking is a purposeful and clear process used in mental activities such as problem solving, decision making, persuading, analyzing assumptions and conducting scientific research. The ability of thinking critically is effected by the competence of knowledge acquired by the students. Based on midterm exam, the result showed that 87,5% of students do not meet the minimum exhaustiveness criteria (KKM). One way that can be condusted to overcome it is applying inquiry learning model.the purpose of this research is to find out the effect of inquiry learning model towards studens’ critical thinking skills. The research is Quasi experiment research by using Randomized Control-Group Research Posttest Only Design. The population is VIII class student in SMPN 11 Padang. The sample is VIII.B students as an experiment class and VIII.C students as a control class, that are selected by purposive sampling technique. The instrument used is final test in form of essays to see the effect of inquiry laerning model of critical thinking ability of students. The hypothesis in this research is examinated by t-test, because the data is distributed normally and it has homogenen variation. Based on the research, the result showed that critical thinkingability t arithmetic > t table (4,23 > 1,67). Therefore, the hypothesis is accepted it can be concluded than applying inquiry learning model can give positive effecttowards students competence of critical thinking ability about excretion system in VIII class SMPN 11 Padang.
Development of Experimental Student Worksheets Based on Scientific Approach for Student Grade XI Semester 1
Authors: Kasih Indri , Ristiono Ristiono , Darussyamsu Rahmawati
Published: September 2020

LKPD Experiment based on Scientific Approach can guide students in developing a concept from the materials they have learned in lab work activity. Based on the matter, a study had done which aimed to produce LKPD experiment using Scientific Approach Based for the students grade XI at SMA/MA it was valid and practical.This study was an elaborated study which had three stages in conducting the research. There was known as 4D model which were define, design, develop. The data were collected by using validity questionnaire and practicality. The subject of this study were 2 biology lecturers, and 2 biology teachersas the validators, 2 biology teachers and 25 students grade XI Science at SMAN 1 Batusangkar, as the practicalitator. The data of this study was primary data which was validity and practical data. The result of this study showed that the LKPDexperiment based on scientific approach for the students grade XI 1st Semester SMA/MA was really valid and really practical.
The Development of Modules Based on Spiritual in Viruses Topic For Senior High School Students
Authors: Anesa Dina Ristiana , Ardi Ardi
Published: September 2020

The purpose of this research is develop a module of spiritual nuance on viruses material for students SMA/MA valid and practical. This research uses 3 of 4 stages 4D models that is define, design, and develop. The developed product was validated by 4 validators including 3 lecturers of biology and 1 biology teacher of SMAN 12 Padang, while for practicality will be done by 33 students of SMAN 12 Padang. The data of this study include the primary data obtained from the questionnaire filled directly by the subject of research. Based on the result of the study obtained the validity of 3,61 with very valid criteria, practicality by teachers 3,49 with very practical criteria and practicality by students 3,38 with very practical criteria.
Effect of Cooperative Learning Model Numbered Head Together (NHT) to Social Attitudes Toward Competency Seventh Grade Students of SMPN 1 Padang
Authors: Suzerli Toeenfi Febrian , Alberida Heffi , Yogica Relsas
Published: September 2020

Learning science in SMPN 1 Padang has been running pretty well in accordance with the curriculum of 2013. However, there are still shortcomings in the aspect of attitude. Such as low self-care among others, mutual esteem is very low when friends come forward, attitudes tend to be selfish and apathetic attitude towards the environment, resulting in low competence of the social attitudes of learners. One of the ways that teachers can do is to implement cooperative learning model Numbered Head Together (NHT). This study aims to determine the effect of cooperative learning model Numbered Head Together (NHT) the competence of the social attitudes of students of class VII SMPN 1 Padang. This study was an experimental study with a quasi-experimental methods (quasi-experimental). The study population was the students of class VII SMPN 1 Padang. Sampling was done by purposive sampling with learners VII.D class as the control class and the class as a class experiment VII.E. The instrument used is the observation sheet attitude competence of learners. The result shows that there are improvement of students social attitude competence after using NHT in class VII SMPN 1 Padang. Factors include are discussed.
The Influence of Problem Solving Model Toward Students’ Critical Thinking Skills
Authors: Latifa Nindya Ananda , Alberida Heffi
Published: September 2020

The aims of this study was to find whether there was an influence of the Problem Solving Model towards critical thinking skills of students of grade XI in SMAN 9 Padang. A Quasi Experiment method with The Post-test Control Group Only Design was used in this study. Students were grouped in an experimental group (Problem Solving model) and a control group (Direct intruction). The data from a test were analyzed using t-test with a=0,05. The findings showed that there was a significant difference of critical thinking skills enhancement in experimental group than the control group.