bluuebunny/crossref_metadata_2025 huggingface dataset:
Temperature Influence on Readability of the QR-Code on Titanium Alloy
Authors: Konchus Darina A. , Salpagarov Eldar M. , Sivenkov Aleksei V.
Published: February 2022

This work shows readability of the QR code of the structural alloy Ti2 surface after the thermal influence. The main goal is the readability estimation after exposure to temperatures exceeding operating alloy temperatures and in destruction crash conditions. Contrast and readability were measured by using a Samsung smartphone and the program Adobe Photoshop CC 2017. The graphs of contrast change depending on the heating temperature were drawn. These graphs illustrate that significant changes in contrast are observed in the range from 500 to 600°C due to darkening of the base metal and the substrate, as well as fading of the dark elements of the code.
Studying Breakdown and Electrical Hardening of Crystal Materials with Proton Conductivity
Authors: Timokhin Viktor M.
Published: February 2022

The breakdown mechanism of a number of crystal materials with hydrogen bonds is investigated. The contribution of the proton component is considered and it is shown that the formation of an avalanche-streamer discharge is characteristic of multilayer electrical insulation materials. As a result of the breakdown, a discharge channel is formed, along which the protons that form the reverse proton conductivity will move in the opposite direction. In the process of directed translational diffusion of protons, the formation and decay of H3O+ and OH-ions occur, which move in opposite directions, resulting in the formation of a reverse positive streamer from the anode to the cathode. For layered samples of phlogopite, muscovite, and magnesium hydrosilicate, it is shown that for thin samples, a volume charge is formed as a result of a multi-avalanche-streamer discharge that significantly exceeds the volume charge that occurs in thick samples, which is determined by the value of high temperature maximum of the spectrum of thermally stimulated depolarization currents. The field of the volume charge reduces the external electric field, as a result of which the breakdown field strength in thin samples increases. That is, the material is electrically strengthened. Based on the results of the research, a non-destructive method of electrical hardening of electrical insulation materials was developed, which was confirmed by the patent.
Microstructure and Eddy-Current Analysis of Aluminum 01570 Welded Joints Obtained by Friction Stir Welding
Authors: Malikov Vladimir N. , Ishkov Alexey V.
Published: February 2022

The article presents the results of studies of aluminum alloys connected by a welded joint obtained by friction stir welding. During this kind of welding a recrystallized fine-grained microstructure is formed in the joint. The pictures of the weld area microstructure are presented, and the eddy current probe signal variations when scanning the joint are shown. The resulting parameter of the eddy current probe was the local electrical conductivity of the weld area. It is demonstrated that the average grain size of the welded joint microstructure varies in the area of weld defects, which was determined by the signal variation of the eddy current probe. The microstructure peculiarities formed in the weld area where the defects are located, and their influence on the mechanical properties of welded joints are discussed. The results of a series of experiments allow concluding about the qualitative characteristics of the obtained welded joints.
Friction Impact on the Accuracy of the Dependence of Micro-Hardness on Plastic Deformation in Testing Metals under Uniaxial Compression
Authors: Tsvetkov Yuriy , Gorbachenko Evgeniy , Larin Roman
Published: February 2022

Two sets of cylinder specimens with a height to diameter ratio of 1.5 made of annealed technical copper and AK12pch silumin were tested for uniaxial compression to different degrees of plastic deformation. At the first stage of the experiments, the ends of the specimen were ground on skins of different grain sizes and polished. Then the micro-hardness of the ends of each sample was measured. Micro-hardness measurements were carried out by the Vickers method at three loads on the indenter: 0.196, 0.490, and 0.980 N. At the second stage, the samples were cut along the meridional section, each sample was poured with a compound based on epoxy resin into an individual mold so that the meridional section of the cut sample came out onto the surface of the mold. After the process of grinding and polishing the meridional section, the micro-hardness of the center of the section was measured under the same loads that were used for measurements at the ends. At the third stage, the dependences of the micro-hardness on the intensity of plastic deformation were made. A comparative analysis of the indicated dependences, made from the results of measurements at the ends of the specimen and the surface of their meridional sections, showed that friction at the ends of the specimen during compression has a significant effect on the position of the dependence “micro-hardness - plastic deformation”. The evaluation of hardening based on the micro-hardness of the ends leads to significant errors.
Identification of Effective Solutions to Replenish the Housing Stock in Armenia and Artsakh
Authors: Galoyan Hripsime
Published: February 2022

About 90% of the apartment buildings that constitute Armenia's housing stock were built before 1990. After the devastating 1988 Spitak earthquake, the seismic conditions in the country were revised and these buildings no longer meet current seismic standards. About half of Armenia's population lives in these buildings, so the reliability, cost-effectiveness and durability of these structures are extremely important for the country. In addition, a number of other causes contribute to the deterioration of the technical condition of the housing fund over time: exogenous geological phenomena, physical and mechanical properties of the soil, the service life of the housing fund, non-compliance with operating conditions, bombardment, etc. The houses built in the Republic of Artsakh are relatively new, but during the September 27, 2020 war unleashed by Azerbaijan, more than a thousand houses were bombarded. They are no longer suitable for use. Following from the above, it is worth to note that in Armenia, as well as in Artsakh, there is a great demand for the reconstruction of the housing stock. In recent years, mainly monolithic, sometimes stone buildings have been constructed in Armenia and Artsakh. Large-panel buildings are almost completely excluded from construction projects. The reason for this is the low energy efficiency of these buildings. However, there are now new high-performance thermal insulation materials that can easily solve this problem. The purpose of the article is to show the feasibility and advantages of constructing large-panel buildings as an effective way to replenish the housing stock in Artsakh and Armenia.
Use of Video Technology in End-of-Life Care for Hospitalized Patients During the COVID-19 Pandemic
Authors: Elma Asiana , Cook Deborah , Howard Michelle , Takaoka Alyson , Hoad Neala , Swinton Marilyn , Clarke France , Rudkowski Jill , Boyle Anne , Dennis Brittany , Vegas Daniel Brandt , Vanstone Meredith
Published: February 2022

Background

Infection control protocols, including visitor restrictions, implemented during the COVID-19 pandemic threatened the ability to provide compassionate, family-centered care to patients dying in the hospital. In response, clinicians used videoconferencing technology to facilitate conversations between patients and their families.

Objectives

To understand clinicians’ perspectives on using videoconferencing technology to adapt to pandemic policies when caring for dying patients.

Methods

A qualitative descriptive study was conducted with 45 clinicians who provided end-of-life care to patients in 3 acute care units at an academically affiliated urban hospital in Canada during the first wave of the pandemic (March 2020-July 2020). A 3-step approach to conventional content analysis was used to code interview transcripts and construct overarching themes.

Results

Clinicians used videoconferencing technology to try to bridge gaps in end-of-life care by facilitating connections with family. Many benefits ensued, but there were also some drawbacks. Despite the opportunity for connection offered by virtual visits, participants noted concerns about equitable access to videoconferencing technology and authenticity of technology-assisted interactions. Participants also offered recommendations for future use of videoconferencing technology both during and beyond the pandemic.

Conclusions

Clinician experiences can be used to inform policies and practices for using videoconferencing technology to provide high-quality end-of-life care in the future, including during public health crises.
Cutting Edge: Serum but Not Mucosal Antibody Responses Are Associated with Pre-Existing SARS-CoV-2 Spike Cross-Reactive CD4+ T Cells following BNT162b2 Vaccination in the Elderly
Authors: Meyer-Arndt Lil , Schwarz Tatjana , Loyal Lucie , Henze Larissa , Kruse Beate , Dingeldey Manuela , Gürcan Kübrah , Uyar-Aydin Zehra , Müller Marcel A , Drosten Christian , Paul Friedemann , Sander Leif E , Demuth Ilja , Lauster Roland , Giesecke-Thiel Claudia , Braun Julian , Corman Victor M , Thiel Andreas
Published: February 2022

Advanced age is a main risk factor for severe COVID-19. However, low vaccination efficacy and accelerated waning immunity have been reported in this age group. To elucidate age-related differences in immunogenicity, we analyzed human cellular, serological, and salivary SARS-CoV-2 spike glycoprotein-specific immune responses to the BNT162b2 COVID-19 vaccine in old (69–92 y) and middle-aged (24–57 y) vaccinees compared with natural infection (COVID-19 convalescents, 21–55 y of age). Serological humoral responses to vaccination excee-ded those of convalescents, but salivary anti-spike subunit 1 (S1) IgA and neutralizing capacity were less durable in vaccinees. In old vaccinees, we observed that pre-existing spike-specific CD4+ T cells are associated with efficient induction of anti-S1 IgG and neutralizing capacity in serum but not saliva. Our results suggest pre-existing SARS-CoV-2 cross-reactive CD4+ T cells as a predictor of an efficient COVID-19 vaccine-induced humoral immune response in old individuals.
Una sfida di libertà per i popoli e per le persone nel grande compito della procreazione umana
Authors: Sgreccia Elio
Published: February 2022

Non disponibile
Problemi attuali del consenso informato
Authors: Fiori Angelo
Published: February 2022

L'Autore, dopo aver delineato il problema del consenso informato del paziente sotto i profili giuridico e deontologico, mette in evidenza l'importanza del consenso sociale informato. La disinformazione pubblica sulle possibilità e sui reali limiti della medicina è additata come una delle cause principali dell'attuale conflitto tra medici e società, il quale si manifesta nelle campagne accusatorie intraprese dai mezzi di comunicazione di massa e nelle sempre più frequenti vicende giudiziarie penali e civili.
Womanism, land and the cross: In memory of Vuyani Vellem
Authors: Kobo Fundiswa A.
Published: February 2022

Premised by Vuyani Vellem’s deep-seated understanding of spirituality and the cross expressed in ‘Whoever wants to be my disciple must deny themselves and take up their cross and follow me’, the paper explores the paradox of learning to die in order to live, which is a dominant message of the Gospel. The cross that symbolises humiliation, oppression and death, is also the cross that symbolises liberation, life and resurrection. The liberative power of the cross concealed in the establishment/dungeons of oppression and bigotries of racism and sexism, can be located in the institution of the church that has become an establishment that Christ stood against. The paper thus looks at the cross, that is, spirituality in juxtaposition to racism, patriarchy and the establishment/dungeons, and posits that one cannot begin to embrace the cross unless one is also conscious of the darker side of the cross. Excavating spirituality and the cross from the establishment is a statement of critique of ideological frames that have shaped the liberation story or narrative that is indisputably racist and patriarchal. To follow Christ is to embrace a spirituality epitomised and exemplified in struggles against the bigotry of racism and patriarchy, and it is to embrace a spirituality that enables one to learn to die in order to live.Contribution: This paper on womanism, land and the cross that attempts to deal with paradoxes, at epistemological, cultural and metaphysical levels, engages the work of the late Prof Vuyani Vellem whose life and scholarship was embedded in paradoxes in the quest for the liberation of black humanity.
Emotional labour: The effects of genuine acting on employee performance in the service industry
Authors: Ngcobo Nomonde F. , Chiwawa Nyashadzashe , Wissink Henry
Published: February 2022

Orientation: Customers’ perceptions of service quality are influenced by the emotions exhibited by service personnel in service contacts. Hence, organisations expect service employees to portray emotions that that are desired by the employer, in addition to their job expertise.Research Purpose: This paper demonstrates how emotional labour, which can have both functional and dysfunctional consequences for the individual and their organisations, is not restricted to interactions at the customer‐organisation interface but is becoming increasingly prevalent within all organisational communications.Motivation for the study: Boundary spanners play an important role for both the organisational reputation and customer satisfaction. However, literature on how emotional labour influences the way service employees execute their duties within the customer-service industry remains insufficient.Research approach, design and method: This qualitative research purposively chose eight participants affiliated with the racecourse industry. Data was analysed thematically.Main findings: The study shows that genuine acting by hospitality boundary spanners helps them to act willingly, hence, less stressful. The findings further suggest that putting on an emotional mask has a negative effect on frontline employees as this makes them feel aloof from the events they encounter at work due to emotional disconnections caused by masking their true emotions.Practical/Managerial implications: Service employees should perceive customer care as a psychological characteristic that requires a balance between voluntary self-management and employee’s regulation of consumers.Contribution: This study extends the body of knowledge about the impacts of emotional labour, specifically the effects of genuine acting on hospitality employees. This contributes towards suggesting emotional labour coping strategies that can be implemented to mitigate possible negative consequences.
Common mental disorders amongst frontline healthcare workers during the COVID-19 pandemic in Ethiopia: A cross-sectional study
Authors: Tariku Mandaras , Ali Tilahun , Misgana Tadesse , Tesfaye Dejene , Alemu Daniel , Dessie Yadeta
Published: February 2022

Background: A novel coronavirus had a profound physiological and psychological burden with regards to contracting the disease or uncertainties in the care of infected patients. Especially, at risk are frontline healthcare workers who are participating in the care of such patients.Aim: This study investigated the burden of mental health problems amongst the frontline health workers during the coronavirus disease 2019 (COVID-19) pandemic in Ethiopia.Setting: East Hararghe Zone of Oromia Region and Harari Regional State, Ethiopia.Methods: A cross-sectional study was conducted in three selected hospitals of COVID-19 treatment centers. Simple random sampling was used to select a sample of 423 participants from each hospital. The self-Reporting Questionnaire (SRQ-20) was used to assess the presence of common mental disorders. Binary and multivariable logistic regressions were fitted to identify factors associated with common mental disorders. Statistical significance was declared at a p-value less than 0.05.Results: The prevalence of common mental disorders amongst frontline healthcare workers was 22.6%. Being female, married, having had direct contact with COVID-19 patients, working in COVID-19 treatment centers and ICU, having any symptoms of COVID-19, current three-month use of any substances, and poor social support were found to be strong predictors of common mental disorders in frontline health workers during COVID-19 pandemic in Ethiopia.Conclusion: The considerable proportions of frontline health care workers have common mental health problems. Strategies need to address COVID-19 related mental health problems, and integrate psychosocial intervention to support the frontline health workers is paramount.
Radicular Cyst Associated with Type 3B Dens Invaginatus in a Permanent Maxillary Lateral Incisor
Authors: Nandini D. B. , Wairokpam Bhoomika Devi , Singh Koijam Sashikumar , Mall Braj Bhushan
Published: February 2022

Dens invaginatus (DI) is a developmental abnormality of the tooth resulting in the invagination of the enamel organ into the dental papilla before the calcification of dental tissues. DI is one of the common dental deformities, but its association with the radicular cyst (RC) is still very uncommon. Oehler’s Type 3B DI has a deep invagination that extends apically communicating with the apical area. This allows the entry of irritants predisposing for dental caries, periapical lesions, and pulp pathology if there is a communication with pulp. The sequelae of undiagnosed and untreated coronal invaginations include abscess formation, retention of neighboring teeth, displacement of teeth, cysts, and internal resorption. Identifying this anomaly early will prevent further complications. This presentation describes a case of RC associated with Type 3B DI in a permanent maxillary lateral incisor in a 9-year-old girl. A brief review of both pathologies is also discussed.
The Small Round Blue Cell Tumors of Sinonasal Tract: Pathologists Grey Zone
Authors: Mohapatra Debahuti , Sahoo Nibedita , Dehuri Priyadarshini , Das Prateek , Mohapatra Ajit Surya , Govardhan Tulasi
Published: February 2022

Background:

One of the most challenging diagnostic categories in the sinonasal tract includes small-blue-round-cell tumors. These are malignant tumors which show many overlapping histomorphology and immunohistochemistry (IHC) findings. Limited, small biopsy of these not completely excisable tumors adds to the diagnostic confusion.

Materials and Methods:

A cross-sectional study was done for 2 years (January 2018–December 2020) in a tertiary care institute, which included 70 cases of tumors of which 49 cases were malignant. All paraffin-embedded blocks were subjected to hematoxylin and eosin stain and IHC followed by molecular study wherever needed.

Results:

Of the total cases, small-blue-round-cell tumor constituted the major category comprising 20 rare and interesting cases which included sinonasal undifferentiated carcinoma (4 cases), malignant lymphoma (2 cases of diffuse large B-cell lymphoma and 2 cases of extranodal natural killer/T-cell lymphoma), rhabdomyosarcoma (2 cases), olfactory neuroblastoma (2 cases), malignant melanoma (2 cases), plasmacytoma (2 cases), atypical Ewing’s sarcoma (EWS) (1 case), EWS (1 case), nuclear protein in testis (NUT) carcinoma (1 case), and small-cell neuroendocrine carcinoma (1 case).

Conclusion:

Tumors of the sinonasal tract are very diverse, more so in small-round-cell tumor which present with a undifferentiated morphology. Thus, accurate diagnosis needs clinicoradiological parameters and special ancillary techniques such as IHC and molecular study in addition to histopathology for early diagnosis and therapy to prevent significant morbidity and mortality caused in these tumors.
Successful Management of Multiple Obstructing Renal Calculi in a 30-Year-Old Patient with Autosomal Dominant Polycystic Kidney Disease using Frequency-Doubled Double-Pulse Neodymium
Authors: Awobusuyi Jacob O , Omisanjo Olufunmilade A , Akinola Oluwaseun O , Awobusuyi Emmanuel I
Published: February 2022

Autosomal dominant polycystic kidney disease (ADPKD) is the most prevalent genetic disorder that results in end-stage renal disease. Although ADPKD patients experience long disease trajectories, factors such as hypertension, proteinuria and renal calculi have been observed to lead to rapid renal function impairment in patients with ADPKD. Furthermore, due to the distorted anatomy that makes access to stone difficult, the management of nephrolithiasis in ADPKD patients is one of the several special situations in which urinary lithiasis presents management challenges. We report the case of a 30-year-old male with ADPKD and renal function impairment as a result of multiple obstructive calculi who was treated in Dialyser Medical Centre, Oshodi, Lagos, with Frequency-Doubled Double-Pulse Neodymium: Yttrium − Aluminium Garnet laser (FREDDY laser) lithotripsy, highlighting the possible advantage of FREDDY laser over other types of laser procedures given the minimal tissue-damaging potential of the laser type.
Mild Anxiety and Depression Disorders
Authors: Elugbadebo Olufisayo Oluyinka , Baiyewu Olusegun
Published: February 2022

Background:

Many sub-Saharan African countries have fragile healthcare systems and the mental health care of older adults is in a precarious state. The lockdown that accompanied COVID-19 infection was another monumental event.

Objective:

This study examined the effect of the restriction and lockdown on the mental health of the caregivers of older patients attending a psychogeriatric clinic in Ibadan, Nigeria.

Materials and Methods:

We selected 178 dyads of patients and their caregivers. These caregivers were administered a semi-structured questionnaire that collected demographic information and asked questions on effect of COVID-19 on caregiving. In addition, Patient Health Questionnaire-9 and generalised anxiety disorder-7 item scale were administered. Participants were interviewed through telephone.

Results:

One hundred and seventy-eight patients' caregivers' dyads were interviewed. About 62.4% of the caregivers were children of the patients. More importantly, 97.2% and 93.8% had neither depressive nor anxiety symptoms and the caregivers expressed little worry about COVID-19. There was no significant difference in the mean depressive and anxiety scores in caregivers of patients with and without dementia (F = 0.28, P = 0.60). Caregivers who were lesser than 50 years in age had significantly higher mean score compared with those who were 50 years and above (F = 5.54, P = 0.03).

Conclusion:

The rate of anxiety and depressive symptoms was very low in this cohort as the lockdown during the pandemic produced little distress to caregivers including those caring for patients with dementia and cognitive impairment. This is a deviation from reports of some other countries and cultures which described psychological implications of COVID-19 on caregivers as severe.
Resilience Level, its Determinants and its Effect on Psychological Well-being
Authors: Biswas Bijit , Kumar Pragya , Ahmad Shamshad , Sachan Neha , Singh Chandramani , Ramalingam Anuvarshini , Das Kumar M.
Published: February 2022

Background:

Adolescents with higher resilience levels are reported to be less vulnerable to psychological illnesses. The study examined resilience level, its determinants and its effect on psychological well-being among school-going adolescents of Patna, Bihar, India.

Methods:

Adopting cross-sectional design we examined resilience levels among the study participants reading in the sixth, seventh and eighth standards of selected schools of Patna district using the Child Youth Resilience Measure-Revised questionnaire during March 2021. Psychological well-being was assessed using Patient Health Questionnaire-4. Data of in total 468 enrolled participants were analysed using SPSS 22.0.

Results:

The mean resilience score was observed to be 62.4 ± 8.8. In multiple linear regression analysis using backward method; increasing age (unstandardised beta [β]: 0.564, standard error [SE]: 0.271, P: 0.038), male gender (β: 2.753, SE: 0.775, P < 0.001), high per capita monthly family income (≥18 USD [median]) (β: 1.829, SE: 0.743, P: 0.014), academic satisfaction (β: 2.003, SE: 0.962, P: 0.038), no history of abuse (physical or mental) in the past 30 days (β: 2.752, SE: 1.220, P: 0.025) and increasing self-esteem score (measured by Rosenberg Self-Esteem Scale) (β: 0.808, SE: 0.098, P: < 0.001) were found to be positive determinants of the total resilience level. Resilience was found to be positively correlated with psychological well-being (spearman rho correlation co-efficient [ρ]: 0.363, P < 0.001).

Conclusions:

Abuse, academic satisfaction and self-esteem were the modifiable determinates of resilience that could be elucidated in this investigation. Resilience level positively influenced psychological well-being.
Comparative Study of Haemodynamic Effects of Intravenous Ketamine-fentanyl and Propofol-fentanyl for Laryngeal Mask Airway Insertions in Children Undergoing Herniotomy under General Anaesthesia in a Nigerian Tertiary Hospital
Authors: Okeyemi Ajibade , Suleiman Aliyu Zakari , Oyedepo Olubukola Olanrewaju , Bolaji Benjami Olusomi , Adegboye Babajide Majeed , Ige Olufemi Adebayo
Published: February 2022

Background:

Insertion of laryngeal mask airway (LMA) with propofol in children may cause hypotension, laryngospasm and apnoea. Ketamine and fentanyl have been combined separately with propofol to prevent depression of cardiovascular system during LMA insertion, especially in paediatric patients. Ketamine-fentanyl and propofol-fentanyl combinations have analgesic effect, prevent coughing and apnoea and regarded as agents of choice for LMA insertions. However, the cardiovascular effects of the two admixtures for LMA insertions have not been fully assessed in children. We compared the haemodynamic effects of ketamine-fentanyl and propofol-fentanyl combinations for LMA insertion in paediatric patients who underwent herniotomy in our facility.

Patients and Methods:

This comparative study was conducted on 80 children aged 1–15 years, ASA physical Statuses I and II, who had herniotomy under general anaesthesia. The patients were randomised into two groups (A and B) of 40 patients each and LMA was inserted following administrations of the two different drug combinations. Patients in Group A received pre-mixed ketamine 2 mg/kg and fentanyl 2 μg/kg while the patients in Group B received pre-mixed propofol 2.5 mg/kg and fentanyl 2 μg/kg. The blood pressure and incidence of apnoea were determined in the two groups during and after the LMA insertion.

Results:

The haemodynamic states of the patients were not comparable statistically as the heart rate, systolic, diastolic and mean arterial blood pressure were significantly higher and stable in the ketamine-fentanyl group than the propofol-fentanyl group (P < 0.05). The incidence of apnoea was significantly lower in the ketamine-fentanyl group compared with propofol-fentanyl group (P = 0.045), but post-anaesthesia discharge scores were similar, with no significant difference in both groups (P = 0.241).

Conclusion:

The use of ketamine-fentanyl combination for LMA insertion in paediatric patients was associated with better haemodynamic changes and lower incidence of apnoea when compared with propofol-fentanyl combination.
On the largest prime factor of $n^2+1$
Authors: Merikoski Jori
Published: February 2022

We show that the largest prime factor of

n^2+1

is infinitely often greater than

n^{1.279}

. This improves the result of de la Bretèche and Drappeau (2020) who obtained this with

1.2182

in place of

1.279.

The main new ingredients in the proof are a new Type II estimate and using this estimate by applying Harman’s sieve method. To prove the Type II estimate we use the bounds of Deshouillers and Iwaniec on linear forms of Kloosterman sums. We also show that conditionally on Selberg's eigenvalue conjecture the exponent

1.279

may be increased to

1.312.
Siyasal İletişimin Dijitalleşmesi: 2018 Cumhurbaşkanlığı Seçiminde Siyasal Partilerin Twitter Üzerinden Karşılaştırmalı Analizi
Authors: IRAK Hakan
Published: February 2022

Sosyal medya kullanımı son dönemlerde dünya çapında yaygın hale gelmiştir. Bireylerin çeşitli amaçlar ile kullandığı sosyal medya siyasi alanda da partilerin, liderlerin, seçimlerde adayların propagandalarını yapmak, vaatler vermek, seçmenlerine seslenmek gibi amaçlarla kullanılmaya başlamıştır. Siyasi alanda sosyal medya kullanımının artması, seçmenlerin kolay bir biçimde adaylara ve partilere erişebilmesini sağlamaktadır. Bu çalışmada siyasal iletişim kavramı kapsamında Türkiye’de 2018 yılında gerçekleştirilen cumhurbaşkanlığı seçim sürecinde siyasi partilerin ve adayların Twitter hesaplarından yaptıkları paylaşımların karşılaştırmalı analizi gerçekleştirilmiştir. Bu kapsamda öncelikle siyasal iletişim kavramı ve gelişimi açıklanmış daha sonrasında siyasi partilerin sosyal medya kullanımları açıklanmıştır. Çalışmanın yöntem bölümünde 2018 yılına ait siyasi parti ve cumhurbaşkanı adaylarının tweetleri incelenmiştir. Yapılan incelemeler sonucunda adayların 2018 Cumhurbaşkanlığı seçim sürecinde en çok etkileşim alan tweetleri ele alınmış ve söz konusu süreçte yapılan paylaşımlar incelenmiştir. Tweet içerikleri kapsamında adayların çoğunlukla hesaplarını rakip aday ve partileri eleştirmek, vaatlerini ve icraatlarını dile getirmek, miting ve etkinliklerden seçmenleri haberdar etmek amacıyla kullandıkları görülmüştür.
Monitorización de Sistemas con Tecnologías de Big Data
Authors: Herrera Yogledis , Heredia Freddy
Published: February 2022

El siguiente trabajo está orientado a proveer información relevante sobre el desempeño de un aplicativo ERP a partir de los archivos de registros de eventos de mismo (logs) que pertenece a una empresa dedicada a la consultoría de sistemas empresariales ERP, con el fin de apoyar a la empresa en la búsqueda de las casusas de baja disponibilidad de su aplicativo. Los logs que son capturados por los sistemas informáticos, por lo general tienden a ser borrados, a pesar de que estos pueden ser transformados en nuevos conocimientos. En su mayoría estos son revisados cuando existe algún tipo de problema, como es el caso de la empresa seleccionada como piloto para el presente trabajo. El objetivo principal de la empresa en estudio es garantizar la disponibilidad del software ERP que comercializa, actualmente cuenta con varias implementaciones del sistema, a los que se conectan sus clientes a cualquier hora del día y desde cualquier parte del país, por lo que juega un papel importante la disponibilidad las 24 horas del día y los 365 días del año, por lo tanto requiere una visión global pero también detallada del comportamiento de sus aplicativos. Entre varias herramientas existentes en la industria del software para el procesamiento de grandes volúmenes de datos con capacidad de entregar la información requerida por la empresa antes mencionada, se seleccionó una plataforma de Big Data llama-da Elastic Stack.
Uso de algoritmo K-media para detectar estado de funcionamiento de electroválvula
Authors: Yánez Diego , Molina Iván , Gallardo Andrés
Published: February 2022

En la actualidad las aplicaciones de la inteligencia artificial dentro de los procesos de ingeniería en general son extremadamente amplios, dado las características que tiene tanto la Inteligencia artificial como la Ingeniaría en general. En este trabajo investigativo exponemos el uso de la inteligencia artificial, en específico el agrupamiento o ¨clustering¨ para poder detectar cuando una válvula se encuentra con fallas o no, de esta forma poder conocer, de manera precisa, el estado de funcionamiento de la electroválvula por Inteligencia Artificial a partir de datos recopilados, dotándole del análisis realizado en Matlab como Data-Set para su proceso de entrenamiento. El elemento de estudio de este artículo es una electroválvula de tres posiciones con compensación de resorte (DIVW estilo C). La válvula se utiliza en el presente experimento en dos regiones de funcionamiento diferentes: a 5 MPa y 20 MPa. Además, se agregó al análisis un escenario en el que la válvula presenta un daño, mismo que consiste en una hendidura de 0,1 [mm] de profundidad.
Caracterización química y degradabilidad in situ de residuos orgánicos como alternativa alimenticia para bovinos
Authors: Vera José , Lazo Rafael , Barzallo Diego , Gavin César
Published: February 2022

El objetivo fue realizar una caracterización química y degradabilidad in situ de residuos orgánicos como alternativa alimenticia para bovinos. Se evaluó la materia seca de residuos de banano, cacao y caña de azúcar generados por fincas productoras dentro del cantón La Troncal - Ecuador. Fue determinado mediante análisis proximal: proteína cruda, cenizas, extracto etéreo, fibra cruda y extracto libre de nitrógeno; Análisis de fibras: fibra detergente neutra, fibra detergente ácida y lignina detergente ácida; Análisis de energía bruta; y degradabilidad in situ con su cinética de degradación, para el cual las muestras se incubaron dentro del rumen de bovinos fistulados durante 0, 3, 6, 12, 24, 48, 72 y 96 horas. Resultando los valores del análisis proximal una opción importante sobre los residuos evaluados como alimento alternativo para bovinos gracias al contenido de nutrientes presentes y de energía bruta, sin embargo, el contenido de fibras y lignina podría limitar su consumo, la degradabilidad in situ de sus materias secas son considerablemente aceptables en dietas de bovinos, observándose su máxima degradación ruminal a través del tiempo a las 96 horas. En conclusión, los residuos orgánicos de banano, cacao y caña de azúcar son una buena alternativa alimenticia en bovinos. Este aprovechamiento liga una gestión sostenible sobre la disposición final de dichos desperdicios sobre el medio ambiente, reduciendo a la vez el costo de producción de alimento para este tipo de semoviente rumiante.
Análisis de Vulnerabilidad Socioeconómica ante Eventos Climáticos en los Cantones Santa Elena y La Libertad
Authors: Valenzuela Cobos Juan Diego , Guevara Viejó Fabricio , Villamar Aveiga Mónica , Monserrate Maggie Verónica
Published: February 2022

La manifestación de los diversos eventos climáticos que se han producido en Ecuador ha ocasionado numerosas pérdidas económicas y humanas. Mediante el presente estudio se pudo determinar los sectores vulnerables de los cantones Santa Elena y La Libertad, mediante la evaluación de factores físicos, humanos y sociales. La investigación se analizó en base a una data histórica que comprenden los años desde 1970 hasta 2010, además de los datos censales del INEC a nivel nacional, de los que se tomaron los pertinentes a los cantones estudiados. El resultado obtenido determinó que el sector con mayor vulnerabilidad socioeconómica se localizó en el cantón de La Libertad en el sector de las instalaciones de la Refinería de La Libertad, cercana a la Plaza de La Libertad.
Determinación simultánea de metales traza en muestras de suelo mediante espectrometría de emisión atómica con plasma de acoplamiento inductivo (ICP-OES)
Authors: Barzallo Diego , Vera Humberto , Gavin César , Lazo Rafael
Published: February 2022

La espectrometría de emisión atómica con plasma de acoplamiento inductivo (ICP-OES) es una técnica analítica muy sensible para la identificación y cuantificación de diferentes elementos de la tabla periódica. En este contexto, el presente trabajo tiene como objetivo cuantificar varios metales: Zn, Mn, Pb y Co en tres tipos de muestras de suelo mediante esta técnica analítica. Las curvas de calibración obtenidas para cada metal presentan una gran linealidad con valores del coeficiente de determinación(r2) por encima del 0,997. La validación del método analítico se realizó mediante el uso de materiales de referencia de cada metal obteniéndose porcentajes recuperación muy cercanos al 100%, lo cual indica que es muy óptima y sensible para la cuantificación simultánea de diferentes metales en muestras de suelo de concentración desconocida a niveles traza y ultra traza, reduciendo además tiempos de análisis, menor intervención del analista y consumo de muestra frente a otras técnicas espectrométricas menos sensibles tales como espectrofotometría UV-VIS. Las concentraciones obtenidas de cada metal en las muestras de suelo analizadas se encuentran por debajo de los niveles genérico de referencia (NGR), lo cual muestra que son aptos para ser cultivados, ya que presentan diferentes tipos de micronutrientes que aportan grandes ventajas al crecimiento de las plantas. Por último, se realizó un tratamiento estadístico ANOVA de un factor para comprobar si existen diferencias significativas entre las tres muestras de suelo analizadas; los resultados obtenidos indican que son estadísticamente diferentes (p<0,05).
Negotiating Cohesion, Inequality and Change
Authors: Jones Hannah
Published: February 2022

Using original empirical data, this book explores how local government officers and politicians negotiate 'difficult subjects' linked with community cohesion policy: diversity, inequality, discrimination, extremism, migration, religion, class, power and change.

It is the Winner of the BSA Philip Abrams Memorial Prize, 2014.
Perkembangan Pendidikan Islam masa Nabi Muhammad SAW Periode Makkah
Authors: Rahimi Rahimi
Published: February 2022

This study aims to find out how the history and development of education at the time of the Prophet Muhammad SAW. Makkah period, To find out the education system at the time of the Prophet Muhammad. Makkah period, to find out how the methods of education at the time of the Prophet Muhammad SAW. Mecca period and to find out the educational values ​​contained in the da'wah of the Prophet Muhammad SAW during the Mecca period. The research method that is relevant to this context is to use a qualitative research method with a contextual reflective approach, namely the theory found in historical books and verses of the Koran and the Hadiths of the Prophet Muhammad SAW. analyzed or interpreted according to the problem under study. While the results of this study are that, Islamic education has existed since the Prophet Muhammad. alive and it is he who laid the foundation with many examples to take. It can be seen from the production of Islamic generations, as well as found a noble civilization as recorded in world history about the glory of Islamic civilization changing the world from darkness to true enlightenment.
Konsep Pendidikan Karakter Dalam Al-Qur'an Dan Hadits
Authors: Mardiah Mardiah , Napratilora Martina
Published: February 2022

The formulation of the problem in this writing is how the concept of character education according to the Qur'an and Hadith? While the goal is to know the concept of character education that exists in the Qur'an and Hadith. This type of research is library research, the data sources used are primary and secondary data sources with deductive and inductive thinking. How to collect data with documentation study and analyze with the method of Tafsir maudhu'i and sarah Hadith. The results found in the verses of the Qur'an about the concept of character education are found in surah as-Shaff verses 2-3, surah Lukman verses 12-14 and surah at-Taubah verse 119. While the Hadith related to the concept of character education is Hadith about hypocrisy, Hadith devotion to both parents and Hadith about honesty, the three Hadiths are narrated by Muttafaqun 'alaih. The concept of character education according to the verses of the Qur'an above we must be istiqomah and unity between words and deeds, be grateful to Allah SWT, believe in Allah SWT by not associating with Him, devotion to parents, honest, avoid hypocritical traits to himself and others, while the concept of character education according to the Hadith we must not lie, betray, do not keep promises, but we must respect, love and be honest to anyone whose goal is to make a perfect human being.
Kehidupan Sakinah dalam Perspektif Pendidikan Islam
Authors: Siagian Seri Yanti , Ilyas M. , Hasnawati Hasnawati
Published: February 2022

Rumusan masalah dalam penulisan jurnal ini adalah bagaimana kehidupan sakinah dalam perspektif Al-Qur’an, apa syarat-syarat menggapai kehidupan sakinah dan apa tanda-tanda seseorang mendapat (menggaapai) kehidupan sakinah. Sedangkan tujuan dalam penulisan ini adalah untuk mengetahui ketiga rumusan masalah di atas. Metodologi penulisan ini bersifat kualitatif dengan jenis penelitian pustaka, dengan menggunakan cara berpikir induktif dan deduktif. Sumber data menggunakan primer dan sekunder dengan content analysis. Hasil temuan dalam penulisan ini menjelaskan bahwa kehidupan sakinah dalam perspektif Al-Qur’an menurut surat at-taubah ayat 6 kita tidak boleh berbangga terhadap kuantitas yang kita miliki tanpa disertai kualitas, sedangkan surat at-taubah ayat 40 menjelaskan bahwa kita tidak boleh takut/gentar terhadap cekaman orang lain, walaupun kita harus berjuang yang sangat melelahkan, asalkan kita meyakini bahwa Allah SWT selalu bersama kita, maka kehidupan sakinah akan kita gapai. Syarat-syarat menggapai sakinah secara global ada dua yaitu, Pertama: Seseorang harus mengosongkan hatinya (kalbunya) dari segala sifat-sifat tercela (maksiat bathin), Kedua : Seseorang harus mengedepankan sifat-sifat kepujian/akhlak terpuji (ta’at bathin).Tanda bahwa seseorang telah mendapat sakinah adalah orang-orang yang berjalan di muka bumi dengan rendah hati, dan mengucapkan kata-kata yang mengandung keselamatan dan juga tanda bahwa seseorang telah mendapat sakinah adalah orang-orang yang bersedia mendahulukan kepentingan orang lain di atas kepentingan pribadinya, walaupun dia sendiri berada dalam kesulitan.
Kesiapan Siswa SMP Negeri 2 Siberut Utara dalam Menghadapi Asesmen Nasional Berbasis Komputer
Authors: Manik Manganju
Published: February 2022

The Computer-Based National Assessment (ANBK) is a government program that aims to map the education quality of primary and secondary school in Indonesia. The purpose of this study was to find out: (1) a description of the student’s readiness in facing the ANBK, (2) what factors were the obstacles for student in preparation for ANBK. This type of research is qualitative research with a case study approach regarding the student’s readiness Utara in facing ANBK. Preparations made by students in facing ANBK include participating in the socialization carried out by teachers who serve as proctors and technicians. Then students participating in computer use training accompanied by teachers which are carried out after school. During this training the teacher provides motivational support to students to stay motivated, enthusiastic, and not worried in facing ANBK There are several obstacles to students' readiness to face ANBK, namely students have low technological literacy, limited available computer equipment, limited power sources as a resource for using computer equipment, and limited internet networks causing students to not be able to participate in simulations on the ANBK website. Although accompanied by obstacles during the preparation process, students have good readiness to participate in the implementation of ANBK, this can be proven by the implementation of ANBK well.
Pengelolaan Media Pembelajaran di tingkat MI/SD
Authors: Fajriwasti Yossi , Lestari Suci Indah , Alfarisi Salman , Sunarti Sunarti
Published: February 2022

The management of learning media at the elementary school level is one of the supports for achieving the targeted learning outcomes. Media management is our way as educators/teachers to manage something that we will achieve in a program for providing learning media at the elementary school level. This research is a literature study that analyzes several sources, both books, journals, and other references to draw a conclusion as a result of the discussion. For this reason, it was found that there are four stages of learning media management, namely, media planning, media organization, media implementation, and media evaluation. Of the four, it is the management or management of media and learning resources at the MI and SD levels. With the management of learning media, the learning process will run smoothly and effectively.
Pengaruh Model Pembelajaran Word Square terhadap Hasil Belajar Tema 1 Sub Tema 1 Kelas 5 Di MI Nurul Huda
Authors: Azizah Ani Habibatul , Awaliyah Bella Riska , Lestari Siti Lilik
Published: February 2022

There are still many teachers who do not use interesting learning methods, as a result students become passive in learning. Teachers should use interesting methods and take advantage of existing facilities so that students are interested and enthusiastic about learning, The code square learning model affects students' learning. Analysis using word square as a test is proved this. The study was conducted at mi nurul huda sukaraja with the number of 60 students, classes a 30 and class b 30 respondents. The objectives of this study: 1. The learning outcomes of students who apply the word square learning model to the theme 1 sub-theme 1, 2. The learning outcomes of students who do not apply the word square learning model to the sub-theme 1 theme, 3. The effect of applying the word square learning model to friends 1 sub-theme 1. The research method used in this study is a quasi-experimental design with a true experimental design. This research can be concluded that the Word Square learning model has an effect on student learning outcomes
Increasing Firm Value Based On External Governance And Modern Finance theory
Authors: Khajar Ibnu , Alfian Ahmad Hijri
Published: February 2022

It is based on the theory of firm and external agency that through investment, funding, and dividend decisions to achieve max firm value. The purpose of this study is to re-examine this model for cases in Indonesia. The sample population of this study comprised 18 companies listed on the Indonesia stock exchange that become the members of LQ-45 index from 2016-2019. The samples were selected by purposive sampling. This study used panel data regression analysis program with Eviews-9 application to answer the research objectives. The results indicated that investment decisions had a significant positive effect, funding decisions had a significant negative effect and dividend decisions had no significant negative effect on firm value.
The Effect Of Industry Type, Government Pressure, And Company Size To Disclosure Of Sustainability Report
Authors: Nugrahani Tri Siwi , Atiqoh Khoirinida Isnaini , Pertiwi Imanda Firmantyas Putri
Published: February 2022

This study examines the effect of industry type, government pressure, and company size on the disclosure of sustainability reports in 41 companies listed on the Indonesia Stock Exchange (IDX) for the 2017-2020 period. The sampling method is purposive sampling. Total observations of 164 companies. This study uses multiple linear regression analysis techniques. The results of the study prove that the type of industry and government pressure have a significant positive effect on the disclosure of sustainability reports. However, the size of the company does not affect the disclosure of the sustainability report.
State Ownership: A Literature Review
Authors: Purnama Asri Cahya
Published: February 2022

State ownership enterprises (SOEs) are always been considered to be less efficient, both in productivity and innovation. SOEs are more likely to do nothing and to maintain the existing advantages due to agency problems The objective of this research is to provide a review of the literature which is exhaustive, especially about state ownership. We presented a literature study and included 14 articles as a result. The result shows some variables that are affected by state ownership and a variable that affects state ownership. Further research is suggested to further explore the variables that affect state ownership.