bluuebunny/crossref_metadata_2025 huggingface dataset:
Joint Pricing and Inventory Management with Strategic Customers
Authors: Chen Yiwei , Shi Cong
Published: October 2019

We consider a model wherein the seller sells a product to customers over an infinite horizon. At each time, the seller decides a set of purchase options offered to customers and the inventory replenishment quantity. Each purchase option specifies a price and a product delivery time. Customers are infinitesimal and arrive to the system with a constant rate. Customer product valuations are heterogenous and follow a stationary distribution. Customers’ arrival times and product valuations are their private information. Customers are forward looking; that is, they strategize their purchasing times. Customers incur delay disutility from postponing to place an order and waiting for the product delivery. Customers’ delay disutility rates are perfectly and positively correlated with their valuation. The seller has zero replenishment lead time. The seller incurs fixed ordering cost and inventory holding cost. The seller seeks a joint pricing, delivery, and inventory policy that maximizes the seller’s long-run average profit. Through a tractable upper bound constructed by solving a mechanism design problem, we derive an optimal joint pricing, delivery, and inventory policy, which is a simple cyclic policy. We also extend our policy to a stochastic setting and establish its asymptotic optimality.
An Urban Archeological Project in Rimini. Preliminary Report (2017-2018). The Contribution of Building Archaeology to Research and Conservation
Authors: Andrea Fiorini
Published: October 2019

Since 2017, a new research project has been undertaken by the University of Bologna on Urban Archeology in Rimini, as part of an agreement with the Soprintendenza Archeologia, Belle Arti e Paesaggio per le Province di Ravenna, Forlì-Cesena e Rimini. This project is an integrated study with academic aims that hopes to produce a map of the archeological evidence of the city. In the first phase of work, which is still ongoing, the researchers have been focused on the architectonic study of some important monuments of the Roman city which are still part of the current urban landscape, such as the Theater, the Amphitheater, Tiberius’s Bridge and the so-called Arch of Augustus.
On a Refined Operator Version of Young's Inequality and Its Reverse
Authors: Sheikhhosseini Alemeh , Khosravi Maryam
Published: October 2019

In this note, some refinements of Young's inequality and its reverse for positive numbers are proved, and using these inequalities, some operator versions and Hilbert-Schmidt norm versions for matrices of these inequalities are obtained.
Bevölkerungsdichte, Stadtstruktur und Umweltverschmutzung
Authors: Borck Rainald
Published: October 2019

In diesem Aufsatz wird der Zusammenhang zwischen Bevölkerungsdichte, Stadtstruktur und Umweltverschmutzung untersucht. Der Beitrag präsentiert stadtökonomische Modelle, in denen die Haupttreiber der städtischen Verschmutzung analysiert werden. Zudem wird empirische Evidenz zu den betrachteten Zusammenhängen präsentiert sowie wirtschaftspolitische Implikationen diskutiert. Kurz gesagt: größere und dichter besiedelte Städte produzieren mehr Luftverschmutzung und$$\text{CO}_{2}$$CO2, aber vermutlich weniger$$\text{CO}_{2}$$CO2pro Kopf. Ohne Regulierung werden Städte zu wenig dicht bebaut, und große Städte könnten im Vergleich zum Wohlfahrtsoptimum zu klein sein.
Histological assessment of the efficiency of rabbit serum in healing skin wounds
Authors: Majeed Abeer Ahmed , Abood Dhyaa Ab.
Published: October 2019

Aim: This study aimed to investigate the impact of rabbit serum on skin wound healing with the help of histological examination.

Materials and Methods: A total of ten indigenous rabbits were used in this study. The animals were divided into two groups: control and serum- treated. The histological assessment was done with a paraffin embedding technique and the histological sections were stained with H&E stain.

Results: Severe infiltration of polymorphonuclear leukocytes with severe fibrin deposits were seen in serum treated group at 2 days post-injury; at 7 days post-injury the changes revealed moderate fibroplasia, fibrin deposit and severe infiltration of both mononuclear and polymorphonuclear leukocytes; at 14 days post-injury, there were marked epithelization and dermal deposition of collagen fibers; and at 21 days post-injury, the epidermis completed epithelization and the dermis showed neither fibroplasia nor infiltration of mononuclear and polymorphonuclear leukocytes.

Conclusion: The results indicated that rabbit's serum can prevent wound infection, accelerate epithelialization and cutaneous regeneration with less granulation.
Yield and Practice Patterns of Surveillance Colonoscopy Among Older Adults: An Analysis of the GI Quality Improvement Consortium
Authors: Calderwood Audrey H. , Holub Jennifer L. , Greenwald David A. , Robertson Douglas J.
Published: October 2019

OBJECTIVES:

There is little guidance regarding when to stop surveillance colonoscopy in individuals with a history of adenomas or colorectal cancer (CRC). We evaluated both yield and recommendations for follow-up colonoscopy in a large cohort of older individuals undergoing colonoscopy, using the GI Quality Improvement Consortium registry.

METHODS:

We analyzed the yield of colonoscopy in adults aged ≥75 years, comparing those who had an indication of surveillance as opposed to an indication of diagnostic or screening, stratified by 5-year age groups. Our primary outcome was CRC and advanced lesions. We also evaluated recommended follow-up intervals by age and findings.

RESULTS:

Between 2010 and 2017, 376,686 colonoscopies were performed by 3,976 endoscopists at 628 sites, of which 43.2% were for surveillance. Detection of CRC among surveillance patients increased with age from 0.51% (age 75–79 years) to 1.8% (age ≥ 90 years); however, these risks were lower when compared with both the diagnostic and screening for the same age band (P < 0.0001). Yield of advanced lesions also increased by every 5-year interval of age across all groups by indication. Even at the most advanced ages and in those with nonadvanced findings, only a minority of patients were recommended for no further colonoscopy. For example, in patients aged 90 years and older with only low risk findings, 62.9% were recommended to repeat colonoscopy.

DISCUSSION:

Surveillance colonoscopy is frequently recommended at advanced ages even when recent findings may be clinically insignificant. Further work is needed to develop guidelines to inform best practice around when to stop surveillance in older adults.
Eutanasia en Colombia: aspectos jurídicos, eclesiales y culturales
Authors: Sánchez Gordillo Jaime Iván
Published: October 2019

Desde dos perspectivas esenciales, como son la consolidación sintética y conclusiva de las formulaciones legales, eclesiásticas y culturales, y la apropiación conceptual que los pacientes, sus familias y cuidadores poseen, se aborda el tema de la eutanasia en Colombia: aspectos jurídicos, eclesiales y culturales. Con una metodología de corte cualitativo se entrevista a enfermos de cáncer y el personal de apoyo espiritual y material que los acompaña, para de esta manera indagar sobre el grado de información que manejan y la forma en la que dicha información determina sus decisiones vitales frente al dolor, el sufrimiento y la muerte.
Conocimientos bioéticos en profesores y estudiantes de la carrera de medicina de la Universidad Central del Ecuador y médicos de Argentina y México 2018
Authors: López-Paredes Raul , Abad-Sojos Andrea Gabriela , Ramón-Uriarte Katherine , Vásquez-Olmedo Karla Vásquez-Olmedo , Piedra Santiago
Published: October 2019

La bioética es una disciplina trascendental en la formación médica para la toma de decisiones. Profesores y estudiantes se encuentran alejados de los conocimientos adecuados. Se planteó un estudio descriptivo de corte transversal. Se encuestaron 15 profesores y 231 estudiantes para evaluar el grado de conocimientos bioéticos con una encuesta estandarizada. Se encontraron bajos niveles de conocimiento en profesores y estudiantes por debajo del 70%. Se comparó en conocimientos a médicos de Argentina, México y Ecuador sin encontrarse diferencias significativas. El nivel de conocimientos sobre bioética en profesores y estudiantes es limitado. Es indispensable establecer programas de formación y capacitación.
Low-dose Vitamin K can Improve Warfarin Control in Patients on LVAD Support
Authors: Tanaka Daizo , Kotch Venessa L. , Abbas Cheryl , Reeves Gordon R. , Entwistle III John WC
Published: October 2019

Background

Anticoagulation with oral vitamin K antagonists (VKA) is very important in patients supported on a left ventricular assist device (LVAD) to prevent thromboembolic complications. Some patients tolerate VKAs poorly and have an unstable INR as a result. It is reported that low-dose vitamin K can improve INR control in patients with an unstable INR in other clinical settings. We evaluated its safety and effectiveness in patients on LVAD support.

Methods

The records of all patients supported on an implantable LVAD between January, 2013 and March, 2014 were reviewed retrospectively to identify those who had received low-dose vitamin K while on warfarin. INR values and warfarin doses before and after initiation of vitamin K supplementation were compared to evaluate its effectiveness.

Results

There were six LVAD patients who were on low-dose vitamin K due to an unstable INR out of a total of 59 VAD patients followed as an outpatient. The standard deviation (SD) of INR decreased significantly after starting vitamin K (p=0.04) while the SD of warfarin dose did not (p=0.22). Comparing divergence from target INR, INR became significantly closer to target INR after starting vitamin K. The number of bleeding complications tended to be fewer on vitamin K, but this did not reach statistical significance (p=0.09).

Conclusions

Daily low-dose vitamin K supplementation can improve INR control in LVAD patients with unstable INR without increasing thromboembolic complications.
Decrease in Driveline Infections with Change in Driveline Management Protocol
Authors: Aslam Saima , Dan Jennifer , Topik Amanda , Belyk Michael , Torriani Francesca , Taplitz Randy , Silva-Enciso Jorge , Barnard Denise , Greenberg Barry , Copeland Jack , Pretorius Victor , Adler Eric
Published: October 2019

Background

 

Driveline infections (DLI) are a significant cause of morbidity and mortality in ventricular assist device (VAD) recipients. We compared driveline infection (DLI) rate after an institutional change in driveline management protocol. 

 

Methods

 

We retrospectively reviewed records of left VAD recipients at our institution, based on driveline management. Group 1: daily driveline dressing change consisting of chlorhexidine cleansing, sterile 4x4 gauze, and use of an abdominal binder. Group 2: Dressing change every 3 days consisting of chlorhexidine cleansing, non-sterile silver-impregnated foam with overlying clear dressing, and use of a driveline anchor. Follow-up was censored at first DLI, device removal, transplant or death. Additionally, Group 1 patients’ follow-up was censored when the change in protocol occurred. Statistical analysis: Student’s t-test, Fisher’s exact test, Kaplan-Meier curve and log-rank test.

Results

DLI occurred in 16% of 88 VAD recipients (Group 1 n=24, Group 2 n=64). The new driveline management protocol resulted in significantly fewer DLI in Group 2 (6.3% vs. 41.7%, p<0.0001).

Conclusions

An updated driveline management protocol demonstrated significant reduction in DLI at our institution. Studies evaluating the optimal approach for driveline management are needed in order to develop a standardized regimen aimed at lowering the risk of DLI.
Venoarterial extracorporeal membrane oxygenation for cardiogenic shock: a retrospective analysis based on the etiology of shock
Authors: Burchett Andrew , Tribble Thomas , Charnigo Richard , Smyth Susan , Guglin Maya
Published: October 2019

Background

We performed a retrospective analysis to evaluate the efficacy of VA-ECMO support in cardiogenic shock based on various etiologies.

Methods

We retrospectively analyzed 99 patients supported with VA-ECMO from January 1, 2012 to January 1, 2015. Outcomes included survival to discontinuation of VA-ECMO support and survival to hospital discharge. The etiologies of cardiogenic shock included cardiac arrest (CPR), acute myocardial infarction (AMI), decompensated congestive heart failure (CHF), pulmonary embolism (PE), right ventricular failure (RVF) not secondary to an acute pulmonary embolism, and post-cardiotomy syndrome (PCS). The PCS group was used as a reference group; odds ratios were estimated and Fisher’s exact tests were performed to compare each other group to the reference.

Results

Patients supported with VA-ECMO due to PE and CHF had better survival to hospital discharge (83.3% and 54.2%, with p = 0.003 and p = 0.011, respectively) versus the PCS group (7.7%). The PE, CHF, and AMI groups had statistically improved survival to VA-ECMO discontinuation. There was no statistically significant difference in survival to VA-ECMO discontinuation or hospital discharge in four subgroup analyses.

Conclusions

Patients supported with VA-ECMO in cardiogenic shock due to PE or CHF demonstrated increased rates of survival to hospital discharge when compared to the PCS group. This study also highlights the need for a more uniform system of categorizing etiologies of cardiogenic shock.
Fatal Flaw – Driveline Fracture as a Rare But Serious Complication Of Mechanical Circulatory Support With Left Ventricular Assist Devices
Authors: Boyechko Yuri , Tribble Thomas , Guglin Maya
Published: October 2019

Background

Patients with advanced heart failure have seen decreased mortality and improved quality of life due to mechanical circulatory support with left ventricular assist devices (LVAD). Regardless of such outcomes, many complications still exist and remain a significant cause of morbidity and mortality. Our purpose is to study the prevalence, clinical course, and outcomes specifically of patients with LVAD driveline (DL) fractures.

Methods

This single-center, retrospective review included all patients at our institution who had continuous flow LVADs and experienced DL fracture/injury from January 2012 - December 2015.

Results

Thirteen of 110 LVAD patients (11.8%) had DL fractures (Table 1). Time from implant to time of fracture was 23+/-16.5 months. The majority of fractures were external (62%), due to trauma (i.e. cut during dressing change). Internal injury, proximal to the cutaneous exit site, occurred in 38% of patients, usually due to unknown causes. Only one patient (7.6%) survived on LVAD support. One survived LVAD explant, two underwent pump exchange, and four others underwent heart transplantation. The remaining 5 expired. All patients with untreated internal fractures died (60%).

Conclusions

Driveline fracture is a rare complication of LVAD and is often lethal when it occurs. Only one patient in our cohort survived without the need for heart transplant, LVAD exchange, or explant. Internal driveline fractures portend a very high mortality. Driveline fracture, especially one that cannot be promptly repaired or if internal fracture is suspected, requires immediate pump exchange or listing for heart transplant.
What Did We Learn about VADs in 2016?
Authors: Guglin Maya
Published: October 2019

The field of mechanical circulatory support is evolving rapidly and new data are published at a rate that can be overwhelming. The last two years, we published reviews entitled “What Did We Learn about VADs in 2014?”(1) and “What Did We Learn about VADs in 2015?”(2). Both papers were well received – the full texts were downloaded 570 and 440 times, respectively, by readers around the globe. Encouraged by this, we wrote the present review, where, like before, we summarized some of the publications from 2016 that we think are particularly important. There may be slight overlap with the end of 2015, because some papers are being published online first.
Reversible Mitral Regurgitation as a Complication of Impella® 5.0
Authors: Bidwell Katrina A. , Kolodziej Andrew R. , Guglin Maya
Published: October 2019

The Impella® is a ventricular assist device used for temporary left ventricular support and has been approved for use since 2008. In this report we present a case of a patient who experienced mitral regurgitation as a complication shortly after placement of an Impella® as well as a brief literature review. To our knowledge this is the first such case demonstrating resolution of iatrogenic mitral regurgitation with removal of the device as opposed to permanent damage.
Paranormal activity: Para-Esophageal/Gastric Hemorrhage in a Patient with a HeartMate II LVAD
Authors: Stone Anna , Ravichandran Ashwin
Published: October 2019

In this report we present an unusual case of non-traumatic, spontaneous para-esophageal/para-gastric hemorrhage requiring multiple units of red blood cells in a female patient with a continuous flow left ventricular assist device. She presented with dysphagia and atypical chest pain 18 months post implantation, on the recommended anticoagulation regimen for HeartMate II support of ASA 81mg and international normalized ratio goal (INR) of 2-3 and was successfully managed with conservation support, volume resuscitation and multiple transfusions. Non-traumatic causes of acute bleeding, including acquired platelet dysfunction are considered.
Management of aortic insufficiency in patients with left ventricular assist device ̶ a retrospective analysis
Authors: Bittner Hartmuth B.
Published: October 2019

Background

Aortic insufficiency is increasingly recognized as a complication of left ventricular assist device (LVAD) support and may lead to clinical decompensation requiring correction. This article describes experiences in managing patients presenting with concomitant aortic insufficiency and with de novo aortic insufficiency following left ventricular assist device implantations.

Methods

All patients undergoing LVAD implantation between 2012 and 2014 were included in this retrospective analysis if aortic valve insufficiency was present on implantation or newly developed (de novo) after implantation. Moderate to severe aortic valve insufficiency was corrected at implantation.

Results

The data of 39 patients were included. At the time of LVAD implantation, moderate to severe aortic valve insufficiency was present in 3 patients and was corrected by bioprosthetic valve replacement (2 patients) and by bioprosthetic valve replacement associated with ascending aorta with hemi arch replacement with a graft due to ascending aortic aneurysm (one patient). Four patients developed moderate to severe aortic insufficiency after LVAD surgery. Treatment with conservative medical management was successful in 3 patients. One patient underwent transcatheter aortic valve occlusion using an Amplatzer closure device after failure of medical management.

Conclusions

Concomitant aortic valve replacement with LVAD implantation is a safe and viable option in managing aortic valve insufficiency. De novo aortic insufficiency may lead to recurrent heart failure and presents a clinical treatment challenge following successful LVAD support; the most appropriate and effective treatment option awaits definition.
Exploring the “Weekend Effect” on the Care of Patients with Left Ventricular Assist Devices
Authors: Ogunbayo Gbolahan , Ha Le Dung , Misumida Naoki , Elbadawi Ayman , Ahmad Qamar , Okwechime Remi , Akanya Deborah , Kolodziej Andrew , Elayi Claude S. , Guglin Maya
Published: October 2019

Background

Many studies have described differences in in-hospital outcomes and length of stay between patients treated for major cardiac conditions on weekdays versus weekends.1 Our study aimed to explore the “weekend effect” on in-hospital care among patients with left ventricular assist devices.

Methods

Using data from the National Inpatient Sample (NIS) database, with a weighted estimate of more than 35 million admissions per year.2 We identified patients 18 years or older with an ICD code signifying presence of a LVAD. Characteristics, comorbidities and clinical outcomes were compared between patients admitted on a weekend versus patients admitted on a weekday. The outcomes of interest were in-hospital all-cause mortality and length of hospital stay (LOS).

Results

Patients admitted on weekend days were younger, otherwise both groups were similar with respect to comorbidities. Patients admitted on weekend days were more likely to have cardiogenic shock, septic shock and respiratory failure. They were also more likely to require mechanical ventilation and undergo cardiac transplantation. Patients admitted on a weekend day however had a shorter hospital median hospital stay. This remained significant after multivariate analysis (OR .81 95% CI .72-.91, p<0.01).

Our data analysis from this large database demonstrates no effect of weekend admission on all-cause mortality among patients with LVADs, although patients admitted on weekend days were more likely to have shorter hospital stay.
Effects of Beta Blockers and ACE Inhibitors after Left Ventricular Assist Device Implantation
Authors: Vaidya Gaurang , Birks Emma , Pillarella Jessica , Salgado Benjamin , Vijayakrishnan Rajakrishnan , Lenneman Andrew , Slaughter Mark , Abramov Dmitry
Published: October 2019

Background

While Beta blockers(BB) and Angiotensin system blockers(ACEinh/ARB) are important components in advanced heart failure therapy, their use after left ventricular assist device (LVAD) implantation remains controversial. Concern has been raised about possible adverse effects of BB on right ventricular(RV) function while tolerance and efficacy/outcome data for ACEinh are lacking. This study aimed to characterize the use of medical therapy post-LVAD implantation and to evaluate its safety and efficacy.

Methods

Demographic, clinical and echocardiographic variables of patients implanted with a continuous-flow LVAD between 2012 and 2015 at a single center were retrospectively reviewed. Mortality and heart failure(CHF) hospitalizations were followed from 6-18 months’ post-implant.

Results

Of a total of 98 patients, the mean age was 57 years, 81% were men and 61% had ischemic disease. While the use of diuretics decreased considerably post LVAD, over 50% continued to require diuretics. At 6th month post-implantation, 73% of patients were on BB, and these patients had significantly lower proBNP at 6 and 12 months follow up. Despite significant prevalence of RV dysfunction in the cohort (>75% at 6 months), there was no significant difference in CHF hospitalizations based on BB use (14% vs 15%) and instead a trend towards less deaths in those on BB (6% vs 15%). ACEinh/ARB use was likewise common at 6 month (61%) and these patients had lower proBNP at 6 and 12 months, lower right atrial(RA) pressures (9 vs 12 mmHg, p=0.03), and a significantly lower mortality—a finding which remained on multivariate analysis.

Conclusion

The use of ACEinh/ARB appeared to be associated with subsequent improved survival, lower proBNP and RA pressures. The use of BB post-LVAD appears safe and was associated with a lower proBNP, even in a patient population with a significant prevalence of RV dysfunction.
What Did We Learn about VADs in 2018?
Authors: Guglin Maya
Published: October 2019

In this paper, we summarized the most interesting and important, from our standpoint, publications from 2018. There may be some slight overlapping with the end of 2017 because some papers were published online first. For the second time this year, we added a section on extracorporeal membrane oxygenation (ECMO) which primarily addresses new developments in veno-arterial (VA) ECMO.
Optimizing Management of Early Childhood Education in Community Empowerment
Authors: Firdaus Nunu Mahmaud , Ansori Ansori
Published: October 2019

Considering the low level of public knowledge about the importance of Early Childhood Education and the low quality of management and the lack of infrastructure (in the form of APE) as well as the many assumptions from the public that Early Childhood Education can only be reached by economically capable people causing lack of motivation to involving their children in the Early Childhood Education program, it is deemed necessary to carry out a study on the optimization of the management of non-formal Early Childhood Education programs held in the community, such as the SPS Early Childhood Education Cempaka which operates in RW 09 Ciwaruga Village, Bandung Regency West. Through the application of qualitative methods with a case study approach, the results of this study reveal that the management process still does not meet the standards required by the government as the organizing program for the Similar Early Childhood Education Unit (SPS) program. Therefore, the manager must be able to define and find ways to achieve all the objectives set through the effective implementation of management functions of Early Childhood Education management.
‘Isolated’ germline mosaicism in the phenotypically normal father of a girl with X-linked hypophosphatemic rickets
Authors: Lin Yunting , Cai Yanna , Xu Jianan , Zeng Chunhua , Sheng Huiying , Yu Yang , Li Xiuzhen , Liu Li
Published: October 2019

Objective

X-linked hypophosphatemic rickets (XLHR) is the most common form of inherited rickets caused by pathogenic variants of PHEX gene with an X-linked dominant inheritance pattern. Precise molecular diagnosis of pathogenic variant will benefit the genetic counseling and prenatal diagnosis for the family with XLHR. Here, we presented an ‘isolated’ germline mosaicism in the phenotypically normal father of a girl with XLHR.

Methods and results

For the initial molecular screen of PHEX gene, DNA samples of the proband and her parents were extracted from their peripheral blood samples respectively. Sanger sequencing found a ‘de novo’ novel heterozygous variant, c.1666C>T(p.Q556X), at the PHEX gene in the proband, but not in her phenotypically healthy parents. Due to an occasional abnormality of his serum phosphate previously, further examinations for the father were taken to exclude the possibility of paternal mosaicism. Eight samples from different tissues were analyzed for PHEX gene by Sanger sequencing. Surprisingly, one ‘isolated’ germline mosaicism was detected only in his sperm with an estimated frequency of 26.67%. The mosaic allele was identical to the c.1666C>T(p.Q556X) variant in the proband.

Conclusions

This is the first case of ‘isolated’ germline mosaicism with pathogenic PHEX variant. Our study provides accurate diagnosis and valuable counseling for this family. This report also alerts clinicians and geneticists to exclude the possibility of the isolated germline mosaicism and prevent intrafamilial recurrences of inherited diseases.
Promoción de la formación docente en la transformación de aprendizajes
Authors: Bermúdez Salamanca Angélica María , Carreño Rueda José Luis
Published: October 2019

El propósito de este estudio fue caracterizar las concepciones y prácticas de los maestros focalizados, de dos instituciones educativas de Piedecuesta, a partir de las Sesiones de Trabajo Situado, que se orientan desde el Programa Todos a Aprender (PTA), en tres ejes: Planeación, evaluación formativa y uso de materiales educativos. Para tal fin, se optó por un diseño cualitativo de tipo etnográfico interpretativo, que teóricamente se soportó en autores como (Reyes, Salcedo, & Perafán, 1999), quiénes hacen reflexiones en torno a las concepciones de ciencia y su relación con las prácticas de enseñanza y aprendizaje, enfatizando en la enseñanza como acción técnica, acción crítica y acción práctica o emancipadora y los resultados de esta, en relación con el aprendizaje. Las conclusiones dejan ver que los docentes reflexionan sobre la necesidad de organizar acciones de aula de manera estructurada, que permitan dejar en evidencia las metas de aprendizaje. Manifiestan que las estrategias del PTA permiten fortalecer las dinámicas educativas, conciben la evaluación formativa como un paso para mejorar los aprendizajes en proceso, consideran la pertinencia de los materiales educativos con relación al saber pedagógico y a las fortalezas que se van a adquirir al desarrollarlo, comprenden que las buenas prácticas garantizan verdaderos cambios que busquen alcanzar las metas de calidad. A partir de esos hallazgos, de las expectativas y sugerencias de los docentes se logró diseñar una estrategia pedagógica de fortalecimiento curricular para construir el plan de clase de manera lúdica e innovadora, consolidando los procesos educativos y respondiendo a las necesidades de aprendizaje de los estudiantes.
The Role of Fashion Bloggers in Fashion Marketing Communication
Authors: Mickevičiūtė Akvilė , Siudikienė Daiva
Published: October 2019

Because of digitization and internet development that took place in the 21st century, fashion industry has been consistently encountering various challenges. While the popularity of social media continues to grow, a new player in fashion industry, along with the medium they control, has emerged – the fashion blogger and the fashion blog. After gaining millions of followers on social media, bloggers acquired a certain power position – they can influence the opinion of their audience. With the popularity of social media, fashion bloggers, who gain a certain position of power through the acquisition of large numbers of followers across social networks, can shape their followers’ opinions, present a variety of fashion product reviews, and participate in the consumer decision-making processes. For fashion companies, collaborations with bloggers are becoming more relevant and an increasing part of a fashion brand marketing strategy. This article introduces theoretical and empirical research that was carried out to analyze and explore the role of fashion bloggers in modern fashion marketing communication. Fashion companies seek to exploit this advantage for commercial purposes and include blogs as advertising channels into their marketing strategy. This article aims to analyze the role of blogs in the modern fashion industry. In order to reach that, the following objectives were set: to research the attributes of the fashion industry and fashion marketing in the 21st century; to analyze the definition, features, types, and significance of fashion blogs with reference to the current fashion industry; to examine the aspects of connection forming between fashion blogger and its audience; to explore the features of Lithuania’s fashion bloggers’ activities and the strategies they use to develop their ties with significant target audiences of the fashion sector. In order to reach the aim of research, two empirical research methods were combined: semi-structured interviews with fashion bloggers and a questionnaire for the followers of fashion blogs. During the study it was established that the role of Lithuania’s fashion blogs is best seen in fashion marketing – blogs are the mediators between fashion companies and consumers. They form a personal bond with consumers and organically disseminate fashion trends to a wide audience.
Natural Law and Civilizational Progress: Assumptions of a Political Theory in Simonas Daukantas’s Historiography
Authors: Pivoras Saulius
Published: October 2019

This article aims to identify and reconstruct a few main elements of political theory upon which the works of Simonas Daukantas, the founding father of the national Lithuanian written history, are based. Daukantas’s major works on Lithuanian history were researched while identifying and closely analyzing the passages where Daukantas specifically speaks about natural law and civilizational progress. Daukantas’s history works were considerably influenced by authors of Neostoic natural law theory, such as Hugo Grotius, Samuel Pufendorf, and Antoine-Yves Goguet. This influence shows in the adopted conceptions of natural needs, natural sociability, and a characterization of the emergence of private property rights in Lithuania with the help of conjectural history methods. Daukantas traces natural law elements in the oldest customs of the people and therefore gives most attention to reconstructing and describing the mores of the ancient Lithuanians. In describing historical evolution, he applied in his works the concepts of bright and dark periods as well as the distinctions of other separate stages of civilizational progress as discussed in Enlightenment historiography and conjectural history in particular.
Economic factors of marriage and cohabitation in Europe: a gender perspective
Authors: Reznik Oleksandr
Published: October 2019

The paper considers economic factors of marriage and cohabitation of men and women in European countries. The analysis showed that the impact of economic factors of marriage or cohabitation is more typical for developed countries of Western Europe. Moreover, the large proportion of variance of the influence of economic factors is observed more among women than among men.
Influence of comprehensive income on marriage and cohabitation are fixed among men, while influence of paid employment on marriage and cohabitation observed among women.
The current state of civil society in Ukraine: problems and prospects
Authors: Trebin Mykhailo
Published: October 2019

Author analyzes the basis for the formation of civil society in Ukraine, especially the formation of the basic institutions of civil society in the context of European integration and international trends, the ways of further improving the institutions of civil society, to overcome the negative trends in the Ukrainian way into the European community.
Julieta Paredes: hilando el feminismo comunitario
Authors: Guzmán Nataly , Triana Diana
Published: October 2019

El feminismo comunitario boliviano es una perspectiva política y epistemológica alternativa frente a las formas tradicionales del feminismo, se origina y practica dentro del pensamiento contemporáneo del sur. El objetivo de este artículo es reflexionar sobre la producción teórica de Julieta Paredes a partir de tres ejes de análisis. El primero muestra el vínculo entre el capitalismo, el colonialismo y el patriarcado, con el fin de proponer una ruta de acción política desde el feminismo comunitario que unifique las estrategias de lucha ante esta triangulación de dominación. El segundo presenta las discusiones y críticas que la boliviana efectúa a los feminismos euroccidentales, al cuestionar su vinculación con el sistema capitalista y la condición de superioridad que aquellos asumen con respecto a los feminismos del sur. El tercero sitúa el proyecto emancipador del feminismo comunitario como una alternativa epistémica que retoma el concepto de comunidad. Esto le permite a la autora evidenciar la condición de dominación sobre la naturaleza impuesta por el sistema de producción capitalista, para salir de la relación dicotómica jerarquizada entre hombres y mujeres y proponer la comunidad como un cuerpo político transformador.
La Federación Anarquista Uruguaya (FAU) y la producción intertextual del anarquismo latinoamericano
Authors: López Julián
Published: October 2019

El artículo indaga sobre la trayectoria política de la Federación Anarquista Uruguaya (FAU) y la revisión crítica que hace del anarquismo para dar cuenta de las formas específicas como se produce teoría en y desde los movimientos sociales en América Latina. El punto de partida de la reflexión sugiere un distanciamiento frente a las perspectivas esencialistas de lo latinoamericano, ante las cuales se propone un camino de interpretación relacional y conflictivo en el que resulta primordial reconocer la intertextualidad como forma de producción teórica. Se concluye que la experiencia de la FAU expresa un ejercicio deliberado por hacer teoría para la práctica política, atendiendo a la necesidad de enraizar las nociones ideológicas en los contextos concretos, es decir, situarlas histórica y socialmente. Es sobre esta trialéctica en movimiento entre teoría, práctica política e ideología que se elaboran nuevas rutas interpretativas con un valor inusitado para pensar la acción política en la región latinoamericana.
Caracterización general de la noción de abigarramiento en Raúl Prada
Authors: Álvarez Diego
Published: October 2019

El concepto de abigarramiento, desarrollado por el intelectual boliviano René Zavaleta Mercado, ha sido central en las reflexiones sobre lo político hechas desde Latinoamérica. También ha sido amplia la recepción de esta noción por parte de la intelectualidad boliviana. Este artículo propone caracterizar los elementos generales de esta noción en el pensamiento del filósofo boliviano Raúl Prada a partir del contraste entre sus planteamientos y el problema de las formaciones sociales abigarradas formulado por Zavaleta. Así, se proponen tres dimensiones generales de la noción de abigarramiento en Prada: una ontológica, una sociohistórica y una epistemológica.
La alteridad epistemológica. Una perspectiva desde América Latina
Authors: Múnera Leopoldo
Published: October 2019

Los trabajos sociológicos y epistemológicos de Orlando Fals Borda en Colombia sirven para ilustrar la búsqueda latinoamericana de una producción intersubjetiva del conocimiento científico en diálogo con otros saberes sociales. Llevan a indagar sobre la convergencia entre diferentes racionalidades o entre diversas combinaciones de la razón, la imaginación y la percepción. También tropiezan con las barreras impuestas por lo que el sociólogo colombiano llamó el colonialismo cultural y su epidermización (épidermisation), que en términos de Frantz Fanon nos hacen pretender ser lo que no somos para asimilarnos al otro que nos coloniza. En esa frontera aparece el ethos de la razón científica y su relativización desde la vigilancia epistemológica propuesta por Bourdieu.
TEMPERATURE-DEPENDENT PHOTOLUMINESCENCE STUDY OF POROUS GAP
Authors: Pham Thuy Thi
Published: October 2019

This paper reports on the temperature-dependent photoluminescence of porous GaP under the 532-nm excitation. Porous GaP formed by electrochemical anodization of (111)-oriented bulk material exhibits green emission at 550 nm (2.25 eV) and red emission at 770 nm (1.65 eV) at room temperature. In the temperature range from 25 K to 275 K intensity from the green emission gradually decreases when the temperature increases. Additionally, peak position of the green luminescence band shifts to lower energy with increasing temperature and the same the GaP band gap narrowing with temperature. This means a contribution of lattice vibrations.
HYDROGEN-PLASMA-TREATED NANO TIO2 FOR PHOTOCATALYTIC OXIDATION OF VOCS IN AIR STREAM
Authors: Nguyen Quang Tu Le , Van Dung Nguyen , Trung Kien Pham , Quoc Vuong Ca , Quoc Thiet Nguyen , Thanh Son Cu , Quang Long Nguyen
Published: October 2019

Unlike water treatment processes, the photocatalytic oxidation of VOCs in air stream exhibits many challenges. This study will develop the hydrogen-plasma-treated TiO2 with improvement in photocatalytic activity. The hydrogen-plasma-treatment was carried out in the non-thermal atmospheric pressure reactor at room temperature or above. The catalysts were prepared and analyzed by advanced techniques such as X-ray diffraction (XRD), scanning electro-microscopy (SEM) and transmission electro-microscopy (TEM). The photocatalytic activity of the catalyst has been investigated under UV light with various reaction conditions such as different initial toluene/formaldehyde concentrations and water content. Significantly, the conversion of toluene by a plasma-treated sample was 1.5 times higher than the bare TiO2 in a similar reaction condition.
La educación para la política en la universidad colombiana.
Authors: Niño-Prato Edgar Allan Niño-Prato , Nieto-Sánchez Zulmary Carolina
Published: October 2019

La presente investigación indaga sobre la necesidad de una ruta didáctica para la enseñanza de la política a los comunicadoressociales en el contexto educativo colombiano. Los comunicadores sociales en formación serán los futuros líderes de opinión, orientadores depensamiento crítico, por éste motivo se acude a la experiencia de docentes, estudiantes y una mirada al contexto sociopolítico colombiano,partiendo metodológicamente desde la observación y el enfoque introspectivo vivencial con entrevistas semi-estructuradas y en profundidadcuyos resultados permiten trazar la ruta didáctica en el programa de comunicación social de la Universidad de Pamplona, sede Villa del Rosario,acudiendo a nuevas estrategias desde el humor, los seriados, el aprovechamiento de los productos multimedia y la capacitación docente yestudiantil para la elaboración de un discurso de la política como base de una comunicación ética y comprometida con la democracia y losprocesos ciudadanos
Ejes estratégicos y perfil del estudiante de matemática financiera de la Universidad Francisco de Paula Santander.
Authors: Vergel-Ortega Mawency , Paz-Montes Luisa Stella
Published: October 2019

La investigación, tiene como propósito analizar ejes requeridos en el plan de formación de jóvenes estudiantes de la Facultadde Ciencias empresariales de la universidad Francisco de Paula Santander, de acuerdo a su perfil, percepciones y necesidades; para este estudiose realizó una encuesta basado en una muestra probabilística a los estudiantes activos, a su vez, permitió recopilar información sobre lalongevidad del estudiante, la necesidades, la manera de seleccionar la universidad y las expectativas observadas a su ingreso. Resultado:población académica de estrato uno a cuatro, la edad de ingreso evidencia una población adulto-joven, para solventar la matrícula trabajan ydeben acudir a entidades externas como el crédito bancario (84,1 %), necesidades giran en torno ejes innovación en calidad educativa,emprendimiento, tic.
Familia y escuela como entidades fundamentales en la construcción de paz.
Authors: Arenas-Villamizar Vivian Vanessa , Mora-Wilches Karina Yurley , Medina-Mendoza Lisney Alejandra
Published: October 2019

El objetivo es identificar la función de la familia y la escuela en la construcción de paz. Se realizó una revisión sistemáticadesde bases de datos como Redalyc, Psicodoc, ProQuest, Psychology Collection y Scielo, para encontrar publicaciones relacionadas con losconceptos de familia, escuela y su rol. Los hallazgos más relevantes indican que la paz es un constructo social el cual se forma mediante accionesque potencialicen los valores, principios éticos y morales en los niños, niñas y jóvenes. Por lo tanto, la familia, la escuela y la sociedad sonvitales para erradicar las conductas violentas que ha caracterizado a los colombianos por muchos años.
Análisis conceptual de las prácticas inclusivas en el aula, diversidad y convivencia escolar.
Authors: Forgiony-Santos Jesús
Published: October 2019

El articulo tiene como propósito analiza las aproximaciones conceptuales de los modelos pedagógicos, la educacióninclusiva y la resiliencia educativa, teniendo en cuenta el paradigma cualitativo que permite la interpretación científica de postuladosrecopilados mediante el diseño documental. Como principales hallazgos se encontró la relación entre el rol del docente y la institución con laimplementación de los modelos pedagógicos en la educación inclusiva y las características de una resiliencia alta en los estudiantes.
Free SHS-compression method for producing large-sized plates from ceramic materials
Authors: Stolin A. M. , Bazhin P. M. , Konstantinov A. S. , Stolin P. A. , Prokopets A. D. , Kovalev I. D.
Published: October 2019

Large-sized plates (120×80×8 and 80×40×8 mm) were obtained from a material based on titanium monoboride by the method of free SHS-compression using press equipment with a force of up to 120 kN. The structural features of the obtained materials, their physicomechanical properties were investigated, the samples were annealed in an oxidizing environment for 10 hours at 1100 ° C.
Metal-ceramic permeable SHS-materials based on alloy-steel scale and ilmenite for cleaning exhaust gases of diesel engines
Authors: Kanapinov M. S. , Kashkarov G. M. , Lebedeva O. A. , Novoselova T. V. , Tubalov N. P. , Yakovleva O. V.
Published: October 2019

The possibilities of obtaining porous permeable cermet SHS-materials with catalytic properties are studied. The mixture consisted of powders of steel alloy scale, concentrate of ilmenite, oxides of aluminum or chromium, the basis of the material formed the backbone of metal ceramics (Al2O3) and reduced iron, as well as additives of metal oxides. The resulting material is intended for the catalytic purification of exhaust gases of diesel engines, in particular, from nitrous oxide, carbon monoxide and soot.
Repair of plates for slide gates of steel casting ladles
Authors: Chugunova I. A. , Kazakov V. V. , Kotenko A. A. , Kvasov I. N.
Published: October 2019

The results of tests of the restored plates for slide gates at the Russian metallurgical enterprises are presented. The features of the physicochemical properties of the plates are established.
Preparation of structural ceramics in the MoSi2-SiC-ZrB2 system by free sintering
Authors: Markov M. A. , Ordanyan S. S. , Vikhman S. V. , Perevislov S. N. , Krasikov A. V. , Bykova А. D. , Staritsyn M. V.
Published: October 2019

The technological modes of obtaining ceramics based on MoSi2, hardened by SiC and ZrB2, which have enhanced physicomechanical properties (relative density ≥ 99,1 %, bending strength 480 MPa), were investigated and experimentally substantiated. The developed composite materials can be recommended for the creation on their basis of functional structural ceramics working at elevated temperatures in an oxidizing environment. Ill. 3. Ref. 11. Tab. 3.
Un-functionalized Gold Nanoparticles as a Simple Colorimetric Probe for Sensitive and Selective Detection of Dopamine
Authors: Khanyile Nokuthula , Krause Rui , Vilakazi Sibulelo , Torto Nelson
Published: October 2019

A dopamine (DA) colorimetric probe based on the growth and aggregation of un-functionalized gold nanoparticles (AuNPs) is reported. Upon addition of AuNPs to dopamine at various concentrations, the shape, size and colour change of the nanoparticles results in spectral shifts to higher wavelengths and hence colour change is the mode of detection. The colour change can be easily observed by the naked eye from as low as 5.0 nM DA, even under sub-optimal conditions. Under optimal pH conditions the calculated limit of detection was 2.5 nM (3σ). The probe was successfully applied to whole blood sample and showed good selectivity and sensitivity towards DA. The simple, sensitive and selective probe could be an excellent alternative for on-site and immediate detection of DA without the use of instrumentation and would thus be useful for rapid diagnostic applications. Keywords: Dopamine, gold nanoparticles, colorimetric probe, neurotransmitter, sensor.
Linking Food Democracy and Sustainability on the Ground: Learnings from the Study of Three Alternative Food Networks in Brussels
Authors: Lohest François , Bauler Tom , Sureau Solène , Van Mol Joris , Achten Wouter M. J.
Published: October 2019

The article explores and discusses, both conceptually and empirically, the exercise of food democracy in the context of three alternative food networks (AFNs) in Brussels, Belgium. It demonstrates that food democracy can be described as a “vector of sustainability transition”. The argumentation is built on the results of a 3.5-year participatory-action research project that configured and applied a sustainability assessment framework with the three local AFNs under study. Firstly, the article presents a localized understanding of food democracy. Food democracy is defined as a process aiming to transform the current food system to a more sustainable one. This transformation process starts from a specific point: the people. Indeed, the three AFNs define and implement concrete processes of power-configuration to alter the political, economic, and social relationships between consumers and producers as well as between retailers and producers. Secondly, the article assesses and discusses how the three AFNs perform these practices of food democracy and what effects these have on the actors concerned. The assessment shows that the three AFNs distinguish themselves along a gradient of their transformative potential in terms of practices. However, this variation in their interpretation of food democracy does not translate into a gradient of performance.