bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nomogram for Predicting COVID-19 Disease Progression Based on Single-Center Data: Observational Study and Model Development
Authors: Fan Tao , Hao Bo , Yang Shuo , Shen Bo , Huang Zhixin , Lu Zilong , Xiong Rui , Shen Xiaokang , Jiang Wenyang , Zhang Lin , Li Donghang , He Ruyuan , Meng Heng , Lin Weichen , Feng Haojie , Geng Qing 
Published: August 2020

Background
In late December 2019, a pneumonia caused by SARS-CoV-2 was first reported in Wuhan and spread worldwide rapidly. Currently, no specific medicine is available to treat infection with COVID-19.

Objective
The aims of this study were to summarize the epidemiological and clinical characteristics of 175 patients with SARS-CoV-2 infection who were hospitalized in Renmin Hospital of Wuhan University from January 1 to January 31, 2020, and to establish a tool to identify potential critical patients with COVID-19 and help clinical physicians prevent progression of this disease.

Methods
In this retrospective study, clinical characteristics of 175 confirmed COVID-19 cases were collected and analyzed. Univariate analysis and least absolute shrinkage and selection operator (LASSO) regression were used to select variables. Multivariate analysis was applied to identify independent risk factors in COVID-19 progression. We established a nomogram to evaluate the probability of progression of the condition of a patient with COVID-19 to severe within three weeks of disease onset. The nomogram was verified using calibration curves and receiver operating characteristic curves.

Results
A total of 18 variables were considered to be risk factors after the univariate regression analysis of the laboratory parameters (P<.05), and LASSO regression analysis screened out 10 risk factors for further study. The six independent risk factors revealed by multivariate Cox regression were age (OR 1.035, 95% CI 1.017-1.054; P<.001), CK level (OR 1.002, 95% CI 1.0003-1.0039; P=.02), CD4 count (OR 0.995, 95% CI 0.992-0.998; P=.002), CD8 % (OR 1.007, 95% CI 1.004-1.012, P<.001), CD8 count (OR 0.881, 95% CI 0.835-0.931; P<.001), and C3 count (OR 6.93, 95% CI 1.945-24.691; P=.003). The areas under the curve of the prediction model for 0.5-week, 1-week, 2-week and 3-week nonsevere probability were 0.721, 0.742, 0.87, and 0.832, respectively. The calibration curves showed that the model had good prediction ability within three weeks of disease onset.

Conclusions
This study presents a predictive nomogram of critical patients with COVID-19 based on LASSO and Cox regression analysis. Clinical use of the nomogram may enable timely detection of potential critical patients with COVID-19 and instruct clinicians to administer early intervention to these patients to prevent the disease from worsening.
YouTube Video Comments on Healthy Eating: Descriptive and Predictive Analysis
Authors: Teng Shasha , Khong Kok Wei , Pahlevan Sharif Saeed , Ahmed Amr 
Published: August 2020

Background
Poor nutrition and food selection lead to health issues such as obesity, cardiovascular disease, diabetes, and cancer. This study of YouTube comments aims to uncover patterns of food choices and the factors driving them, in addition to exploring the sentiments of healthy eating in networked communities.

Objective
The objectives of the study are to explore the determinants, motives, and barriers to healthy eating behaviors in online communities and provide insight into YouTube video commenters’ perceptions and sentiments of healthy eating through text mining techniques.

Methods
This paper applied text mining techniques to identify and categorize meaningful healthy eating determinants. These determinants were then incorporated into hypothetically defined constructs that reflect their thematic and sentimental nature in order to test our proposed model using a variance-based structural equation modeling procedure.

Results
With a dataset of 4654 comments extracted from YouTube videos in the context of Malaysia, we apply a text mining method to analyze the perceptions and behavior of healthy eating. There were 10 clusters identified with regard to food ingredients, food price, food choice, food portion, well-being, cooking, and culture in the concept of healthy eating. The structural equation modeling results show that clusters are positively associated with healthy eating with all P values less than .001, indicating a statistical significance of the study results. People hold complex and multifaceted beliefs about healthy eating in the context of YouTube videos. Fruits and vegetables are the epitome of healthy foods. Despite having a favorable perception of healthy eating, people may not purchase commonly recognized healthy food if it has a premium price. People associate healthy eating with weight concerns. Food taste, variety, and availability are identified as reasons why Malaysians cannot act on eating healthily.

Conclusions
This study offers significant value to the existing literature of health-related studies by investigating the rich and diverse social media data gleaned from YouTube. This research integrated text mining analytics with predictive modeling techniques to identify thematic constructs and analyze the sentiments of healthy eating.
Brain Tumor Discussions on Twitter (#BTSM): Social Network Analysis
Authors: Feliciano Josemari T , Salmi Liz , Blotner Charlie , Hayden Adam , Nduom Edjah K , Kwan Bethany M , Katz Matthew S , Claus Elizabeth B 
Published: August 2020

Background
The Brain Tumor Social Media (#BTSM) Twitter hashtag was founded in February 2012 as a disease-specific hashtag for patients with brain tumor.

Objective
To understand #BTSM’s role as a patient support system, we describe user descriptors, growth, interaction, and content sharing.

Methods
We analyzed all tweets containing #BTSM from 2012 to 2018 using the Symplur Signals platform to obtain data and to describe Symplur-defined user categories, tweet content, and trends in use over time. We created a network plot with all publicly available retweets involving #BTSM in 2018 to visualize key stakeholders and their connections to other users.

Results
From 2012 to 2018, 59,764 unique users participated in #BTSM, amassing 298,904 tweets. The yearly volume of #BTSM tweets increased by 264.57% from 16,394 in 2012 to 43,373 in 2018 with #BTSM constantly trending in the top 15 list of disease hashtags, as well the top 15 list of tweet chats. Patient advocates generated the most #BTSM tweets (33.13%), while advocacy groups, caregivers, doctors, and researchers generated 7.01%, 4.63%, 3.86%, and 3.37%, respectively. Physician use, although still low, has increased over time. The 2018 network plot of retweets including #BTSM identifies a number of key stakeholders from the patient advocate, patient organization, and medical researcher domains and reveals the extent of their reach to other users.

Conclusions
From its start in 2012, #BTSM has grown exponentially over time. We believe its growth suggests its potential as a global source of brain tumor information on Twitter for patients, advocates, patient organizations as well as health care professionals and researchers.
‘Azl Sebagai Pencegah Kehamilan (Studi Perbandingan Antara Mazhab Hanafi dan Mazhab Syafi’i)
Authors: Djawas Mursyid , Misran Misran , Ujong Cut Putrau 
Published: August 2020

‘Azl mungkin metode kontrasepsi tertua di dunia, karena ‘azl cara efektif untuk mencegah kehamilan.’azl berarti menarik penis dari vagina keluarnya sperma. Pastinya orang yang melakukan ‘azl (senggama terputus) ada maksudnya,seperti menunda kehamilan atau menjaga jarak dari anak sebelumnya. Karena Ketika sperma yang dikeluarkan di luar vagina pasti tidak akan terjadi pembuahan sehingga tidak terjadi kehamilan. Dalam konteks kekinian ‘azl mengalami pergeseran, ini dapat kita lihat dari pelaksanaan maksud dan tujuan program keluarga berencana (KB), yaitu mengatur jumlah kelahiran. Pengertian secara khusus KB adalah pencegahan konsepsi atau pencegahan pertemuan sel mani laki-laki dengan sel telur perempuan. Jika dilihat hasilnya nya antara ‘azl dan KB adalah sama, karena tujuannya sama-sama untuk mencegah pembuahan (kehamilan), tapi yang membedakan antara KB dan ‘azl hanya pada proses dan alat yang digunakan, ‘azl tidak mengggunakan alat apapun (secara alami) sendangkan KB mengunakan alat kontrasepsi baik berupa pil kb atau suntikan obat. Berdasarkan hasil istinbath hukum antara mazhab hanafi dan mazhab syafi`i, praktek ‘azl di bolehkan, meskipun berbeda pendapat dari segi pelaksanaanya. Mazhab hanafi membolehkan praktek ‘azl dilakukan oleh pasangan suami istri asal adanya persetujuan dari istri, sedangkan menurut pandangan mazhab syafi`i praktek ‘azl malah dibebaskan tanpa harus adanya persetujuan dari istri.
Persepsi Masyarakat Tentang Pelaksanaan Iddah Wanita Karier Karena Cerai Mati Di Kec. Blangkejeren Kab. Gayo Lues
Authors: Devy Soraya , Maryam Maryam 
Published: August 2020

Perkembangan dunia modern dewasa ini, banyak kaum wanita muslimah yang aktif di berbagai bidang, baik itu politik, sosial dan lainnya. Perempuan yang bekerja disebut sebagai wanita karier. Persepsi masyarakat bahwa seorang wanita karier yang tetap berkarier selama menjalani iddahnya karena cerai mati oleh suaminya dianggap menentang hukum islam. Karena menurut pemahaman masyarakat tersebut dalam masa iddah tidak boleh keluar rumah apalagi bekerja diluar rumah, memakai pakaian yang celup dengan warna kecuali hitam dan tidak dibolehkan bersolek. Permasalahan dalam penelitian ini adalah bagaimana persepsi masyarakat tentang pelaksanaan iddah wanita karier karena cerai mati di Kecamatan Blangkejeren Kabupaten Gayo Lues dan bagaimana tinjauan hukum Islam terhadap persepsi masyarakat tentang pelaksanaan iddah wanita karier karena cerai mati di Kecamatan Blangkejeren Kabupaten Gayo Lues. Untuk mencapai tujuan tersebut, peneliti menggunakan pendekatan kualitatif. Metode penelitian yang dipakai untuk meneliti ini adalah studi kepustakaan dan studi lapangan dengan metode wawancara, angket dan dokumentasi. Hasil yang didapati adalah 98% responden mengetahui bahwa apabila wanita karier yang ditinggal mati oleh suaminya maka wanita tersebut harus beriddah serta masyarakat juga memahami bagi wanita karier yang ditinggal mati oleh suaminya tersebut maka wanita tersebut harus berhenti bekerja selama menjalankan masa tunggunya yakni selama 4 bulan 10 hari, 100% responden menyetujui bahwa wanita karier yang sedang menjalankan iddahnya tersebut dilarang keluar rumah, bersolek, memakai pakaian yang celup dengan warna kecuali hitam dan dilarang menikah. 100% responden menyetujui bahwa persepsi tersebut muncul dari kebiasaan masyarakat setempat. Menurut tinjauan hukum Islam wanita karier yang di cerai mati oleh suaminya tersebut boleh bekerja tetapi memiliki batasan-batasan terhadapnya. Misalnya perempuan tersebut boleh berhias yakni hanya untuk memenuhi syarat dari pekerjaannya, dengan tujuan agar wanita karier tersebut tidak di pecat dari pekerjaanya.
Medición de materiales con radiación Terahertz
Authors: Escobar Mejía Andrés Felipe 
Published: August 2020

La radiación Terahertz (THz) o Rayos T, define las ondas electromagnéticas con un rango de frecuencias entre 0,1 THz y 10 THz. Es posible categorizar las técnicas de detección de radiación en la banda de los THz en técnicas coherentes e incoherentes. La principal diferencia entre ellas es que en la técnica coherente se determinan tanto la amplitud como la fase de la señal recibida; pero, en la técnica incoherente, solo se mide la intensidad de la señal.La espectroscopía THz en el dominio del tiempo es, generalmente un método coherente. Los detectores directos como los piroeléctricos son principalmente detectores incoherentes. Este artículo presenta la medición experimental de diferentes materiales cuando se irradian con radiación de terahertz, aplicando técnicas de espectroscopia THz en el dominio del tiempo. La radiación es emitida por una antena fotoconductora, excitada por un láser de femtosegundos. Los resultados se obtienen al medir el pulso THz transmitido a través de los materiales al implementar sistemas de detección coherentes e incoherentes, al analizar los datos obtenidos, se logró obtener el índice de refracción y coeficiente de absorción, en caso de la técnica coherente, y el coeficiente de absorción en la técnica incoherente, para los distintos materiales estudiados en este trabajo. Con estos resultados se concluye que es posible realizar una caracterización de distintos tipos de materiales al ser irradiados con radiación THz, lo cual conlleva a diversas aplicaciones desde la seguridad hasta el control de calidad.
PID control for a two-axis orientable solar panel system
Authors: Roldán Mckinley Javier , Fernández  Pizarro Andrés , Beltrán González Jaison 
Published: August 2020

Los sistemas solares de paneles orientables mejoran grandemente su desempeño, basado no solamente en el movimiento en el momento indicado, sino también una adecuada estrategia de movimiento para describir esa rotación. El control de un Sistema de Panel Solar Orientable de dos grados de libertad fue simulado para un esquema de control que combina acciones Proporcional, Integral y Derivativa con un lazo interno de control de par computado. Este lazo interno de control permite el cálculo de torques en las juntas. Fueron evaluadas dos plantas del modelo dinámico del Panel Solar Orientable: analítica y Simmechanics. Tres casos de movimiento fueron simulados: aleatorio, a una posición segura y final del ciclo diario. Las ganancias del controlador se hallaron usando la oscilación sostenida del segundo método de sincronización Nichols-Ziegler. Para ahorrar energía durante el movimiento, se requiere movimiento no subamortiguado, obtenido mediante la anulación de la componente integral del controlador. Errores de posición teóricos muy pequeños para ángulos de elevación y azimut, sugieren que el esquema Proporcional Dreivativo con Control de Torque Calculado es satisfactorio para controlar el movimiento del panel durante el día.
Panorama da produção científica internacional sobre Business Analytics
Authors: Sincorá Larissa Alves , Carneiro Teresa Cristina Janes , Oliveira Marcos Paulo Valadares de 
Published: August 2020

Esta pesquisa tem como objetivo analisar a produção acadêmica internacional sobre business analytics (abordagem analítica) obtida em periódicos internacionais disponíveis em sete base de dados. A pesquisa pretende contribuir auxiliando pesquisadores e profissionais interessados no tema com um panorama dos estudos já realizados. A pesquisa avaliou publicações no período entre 2004 e 2016, utilizando-se de técnicas bibliométricas para investigar 47 artigos. Dentre os achados da pesquisa, está que empresas atualmente veem na orientação analítica a oportunidade para obter resultados superiores de desempenho.
Changing Identities in Community of Practice: Expert Teachers to Novice Researchers
Authors: Supramaniam Kaarthiyainy , Md Razak Mohamad Idham , Arumugam Nalini 
Published: August 2020

Teachers and researchers are said to belong to two distinct communities of education. At the university, academics are required to engage in research work which could be a relatively new experience for teachers who had solely focused on teaching after joining the universities. Hence the purpose of this qualitative research is to shed some light on the tensions that are created and experienced by novice researchers at the university whose previous careers were as teachers in schools. Two lecturers, Gina and René, were purposely selected to investigate the phenomenon of changing identities from expert teachers to novice researchers, and to observe how the experienced teachers became newcomers adapting to the new target practices of research as required by the university. Findings from interviews and observations revealed the tensions and negotiations that occurred as the teacher naivetes engaged in the target research practices from teacher trajectories, but prolonged engagement in the target practices revealed emergence of researcher identities. The findings of this study suggest that novices who are expected to adopt new practices need to be supported with instructions and learning opportunities for effective transitions.
Keywords: Changing identity, Expert teachers, Learning Organisation, Novice, Researcher
The Changing Nature of the Conflict. From Global to Local
Authors: Dinicu Anca 
Published: August 2020

Abstract
A misunderstanding or a disagreement, an incompatible situation or a competition between opponents that can generate into violence, conflict is a constant feature of human society. It can lead, depending on the context, to development or, on the contrary, to the dissolution of the organization or society. From the international relations’ point of view, a conflict is a dynamic process based on the clashing of interests of the international system’s participants. After the end of the Cold War, the change of conditions and determinations at the international level imprinted a specific evolution of the international conflict by transforming it in accordance with the conversion recorded by the global power architecture. In the same logic can be explained the reverse of the conditioning relationship, respectively of transforming the structure of the international system depending on the stake and the magnitude of the international conflict.
Views on the Most Important Threats from the National Defense Strategy - Corruption, Organized Crime Transnational Organized Crime Terrorism (Cyber Terrorism)
Authors: Nagâț Violeta Ioana 
Published: August 2020

Abstract
New threats from cyber bullying, new risks and vulnerabilities, can have serious consequences for national security. For this reason, it is necessary for specialists in preventing and combating terrorism and organized crime to be noticed through ingenuity, predictability and a good knowledge of human psychology. This will ensure the information filter necessary to make the best decisions for the defense of the Romanian state. The Italian intelligence service considers that the terrorist threat is the main security priority and that “Islamic radicalism remains a first-rate threat, despite the significant losses suffered by Daesh (Arabic acronym of the Islamic State - no)” in Iraq and Syria. In addition to terrorism, the Intelligence Services also warn of several other potential threats to the security of the states, including increasing the presence of extreme right-wing groups characterized by racism and intolerance. “These groups have been set up, which have a good implantation especially among the youngest, and the best organized ones do not lack the connections with other organized crime networks. In line with the fight against corruption, it is necessary in the new National Security Strategy to ensure an important place to combat the phenomenon and causes of corruption, corruption being considered a threat to national security.
The 10,000 Persian Immortals, a Model for the Special Indoeuropean Troops
Authors: Strechie Mădălina 
Published: August 2020

Abstract
The history of humanity got from the Persians the first imperial organization, the first process of integration of the conquered ones, the first postal service, the most effective means of communication at the dawn of Antiquity, and also the best organized militarized services.
The most special of the Indo-European Antiquity troops was the Royal Guard, founded by Darius I, one of the great kings of humanity, a political titan, and equally an extraordinary general through his institutional creations of force. The Royal Guard of Darius I, known in history as the 10,000 immortals, is the subject of our study, as it is one of the most complex special militarized structures in human history of all time, inspiring the military structures of all the Indo-Europeans, whether the Hoplite revolution, the organization of the Macedonian phalanx or the Roman Praetorian Guard and more than that.
The 10,000 immortals combined not only the heroic character (while multiplying it), which appeared for the first time with the Greeks of the Homeric period, but also strict discipline, in the Spartan sense, contemporary with this troop, the organization and the well-developed logistics, which would inspire the Roman army, the military brotherhoods characteristic of all the Indo-Europeans, but this totally special troop, in particular, imposed the model of the educated (even intellectual) military man, a soldier of the supreme god of the Good, faithful first of all to the Good and to his king, a military man who used all the weapons of the time.
This special troop was a true institution that also provided information to the Persian king, information being one of the most effective weapons. Moreover, the Persians through this Royal Guard used for the first time psychological impact as a weapon, this being the first case of effective manipulation by the number that was kept constant, but also by name. Only the gods were immortal, and the very large number of soldiers who made up this special troop is impressive even today. The armament of this extraordinary troop comprised all the weapons of the time, the bow above all, which the Aryans considered the favourite weapon of Indra, the most warlike god of the Indo-European gods.
Adapting Tactical Military Structures to the Current and Future Operational Environments
Authors: Tudorache Paul , Ispas Lucian 
Published: August 2020

Abstract
Using the lessons learned from recent military operations such as Operation Inherent Resolve (OIR) from Syria and Iraq, we proposed to investigate the need for tactical military units to adapt operationally to grapple with the most common requirements specific to current operational environments, but also for those that can be foreseen in the future. In this regard, by identifying the best practices in the field that can be met at the level of some important armies, such as USA and UK, we will try to determine a common denominator of most important principles whose application may facilitate both operational and organizational adaptation necessary for tactical military units to perform missions and tasks in the most unknown future operational environments.
Achieving the Objectives in the Field of Consequences Management at the National Level, By Preparing the Economy and the Territory for Defense
Authors: Badea Dorel , Roman Daniel , Iancu Dumitru 
Published: August 2020

Abstract
This article presents some lines of effort to reach the specific objectives, for a topical area of collective security, the management of consequences. Conceptual correlations in this spectrum are highlighted between emergencies, critical infrastructures, community resilience. Theoretical research is accompanied by examples taken from practice, the case study at national level being focused on the contribution made to the efficient management of the consequences of the processes specific to the preparation of the economy and the territory for defense. It is emphasized, based on the experience of the specific events of the Covid 19 dynamics, the role and importance of this sector of administrative activity in the critical infrastructure security plan.
Empirical Analysis of the Influence of Culture in Managerial Processes Based on the Hofstede Model
Authors: Iancu Dumitru , Badea Dorel 
Published: August 2020

Abstract
We communicate and decide every day, but the complexity of the context in which we do these things is increasing. Today, the cultural structure of the organization’s members, due to the need to have competent employees in correlation with the established objectives, is somewhat puzzled and dynamical. Thus, the decision-makers must take into account (mandatory) the cultural basis of the subordinates when choosing the best alternative for solving an organizational problem. From this perspective, Hofstede’s model can be one of the explanatory modalities of the organization’s cultural characteristics as a basis to identify the action’s solutions in that organization for the future.