bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of Sonication Time on the Stability and Viscosity of Functionalized MWCNT-Based Nanolubricants
Authors: Dalkilic Ahmet Selim , Küçükyıldırım Bedri Onur , Eker Ayşegül Akdoğan , Yıldız Faruk , Akpinar Altuğ , Jumpholkul Chaiwat , Wongwises Somchai
Published: July 2019

Background:

Active scholars in the nanofluid field have continuously attempted to remove
the associated challenge of the stability of nanofluids via various approaches, such as functionalization
and adding a surfactant. After preparing a stable nanofluid, one must measure the properties,
as this is vital in the design of thermal systems.

Objective:

Authors aimed to investigate the stability and viscosity of refrigeration lubrication oilbased
nanofluids containing functionalized MWCNTs. The effects of concentration and temperature
on viscosity were studied. Furthermore, the present study focused on the effect of sonication time on
the stability and viscosity of the prepared samples.

Methods:

After the preparation of chemically functionalized MWCNTs, solutions were dispersed
with an ultrasonic homogenizer for 2, 4 and 8 hours sonication at maximum power. Viscosity measurements
for all samples were made 10 minutes after sonication by adjusting the proper spinning
velocity using a digital rotary viscometer.

Results:

The first part deals with the stability of the nanofluid as a nanolubricant, and the second one
investigates the viscosity of the nanofluid and the effects of various parameters on it. The last one is
related to the validation of the measured viscosity values by means of well-known empirical correlations.
The measured data are given for validation issues.

Conclusion:

The samples will have higher stability by increasing the time of sonication. The viscosity
of a nanofluid does not change with the increase of sonication time to two hours and higher. Up to
mass concentration of 0.1%, the effective viscosity increases with adding nanotubes linearly.
A Framework with Enhanced Security for Service Oriented Architecture
Authors: Shashwat Anurag , Kumar Deepak , Chanana Lovneesh
Published: July 2019

Background:

Service Oriented Architecture is one of the acceptable frameworks for
application development which provides better functionality such as composability, reliability, reusability,
distributed deployment and interoperability which meet enterprises dynamics. So, SOA
framework is a point of attraction for consumers.

Objective:

However, SOA framework fails to provide security at a granular level. Along with SOA
functionality, the consumer also needs a secure environment so that each application can be reliable.

Methods:

SOA functionality like modularity and reusability are helpful in cross-organization context
but these quality requirements reduce the security of the applications. In the past years, many security
techniques have been provided by different researchers, still, security is a concern of SOA framework.

Results:

Most of the research focus security enhancement at higher layers of SOA reference architecture
only so that SOA functionality remains unaffected. In this paper, the author(s) provided a
framework which enhances the security at both the higher layer and lower layer.

Conclusion:

Also, this framework focuses on security enhancement at the granular level so that
application-level security can be enhanced. The author(s) also included a technique to keep SLA
similar to the exiting application after the implementation of security at each layer. This framework
will be helpful in enhancing the end to end security and reliability of an application.
QUALITY ASSURANCE OF ADDITIVE PRODUCTION THROUGH SYSTEM OF TOLERANCES OF TEMPERATURE MODES OF PRINTING
Authors: Chabanenko A. V. , Smirnova V. O. , Getmanova G. V. , Nazarevich S. A.
Published: July 2019

Now, an increase in productivity due to computer-aided manufacturing using digital prototypes is reflected in the formation and development of additive manufacturing technologies, also known as «Layer Synthesis». The use of additive technologies allows us to provide individualization of production, reduce material-intensive costs, increase the economic efficiency and effectiveness of the production of body elements of electronic equipment (REA), as well as improve the quality of the body elements produced. In additive manufacturing, it is necessary to consider many parameters and characteristics incorporated in the installation. To ensure the quality of additive production, it is very important to observe the required temperature conditions depending on the material used. The article deals with the issues of setting the temperature regimes and controlling the additive system. A comprehensive indicator of product quality is proposed, taking into account the safety parameters and identification indicators of the properties of polymers used in additive manufacturing.
ENSURING QUALITY OF INSTALLATION OF PRINTED CIRCUIT BOARDS BASED ON ORGANIZATION OF MACHINE-TO-MACHINE INTERACTION AND 3D-INSPECTION
Authors: Korshunov G. I. , Petrushevskaya A. A. , Zaitsev P. S.
Published: July 2019

The article discusses the application principles of the industry 4.0 concept to improve the basic technological processes of electronics production. The problems of quality assurance in the automatic installation of printed circuit boards. Examples of the introduction optical inspections and fluoroscopy to reduce the marriage are given. The features of screen printing processes and their control using 2D and 3D inspections are considered. The location structure of the automatic optical inspection installations in the automatic line of printed wiring and communication of the automatic screen printing printer and 3D solder paste inspection is presented. A process model for the automatic installation of printed circuit boards using the elements of Industry 4.0 is presented. The organization of machine-to-machine interaction increases the automation of the system and eliminates the «human factor», as a result of which the production process is accelerated and the probability of occurrence erroneous actions resulting in nonconformities of products with standards is reduced. The tasks of organizing and certification of 3D fluoroscopy electronics, as well as the actual improving tasks the typical automatic assembly line of printed circuit boards, are considered.
ACCURACY RATING MEASUREMENT OF VIBRATION ELECTROMECHANICAL DEVICES
Authors: Golubkov V. A. , Shishlakov V. F. , Fedorenko A. G. , Vataeva E. Yu.
Published: July 2019

Electromechanical devices consist mainly of rotor systems. Vibration is the result of the interaction of the elements of the rotor system and is largely determined by the accuracy of manufacturing elements at the production stage and defects arising in the process of operation. The main components of the rotor systems that affect vibration are bearings. To determine the technical condition of the bearings and the service life of the rotor system, it is necessary to accurately measure the unobservable vibrations of the rotor. The article describes the model of the channel for measuring the vibration of an electromechanical system, built using the apparatus of bond graphs. The transfer function is obtained by analyzing the signal flow graph. The systematic and random errors of vibration measurement are analyzed depending on the mass ratio between the system case and the vibration transducer for various sensor masses and attachment rigidity.
METHODIC FOR ANALYSES AND RANKING OF QUALITY RISKS AT PRODUCTION ASSEMBLY LINE
Authors: Shanta M. V. , Semenova E. G.
Published: July 2019

Methodic of evaluation of assembly line in order to evaluate level of protection of working places from quality risks is described in the article. Topic is actual because in normative documents there is only regulation of requirements for the product, but there is no risk evaluation methodic for production line. Novelty of the topic is that according to developed methodic there is possibility to evaluate general risk level of the assembly process and conduct analyses for single risks, which has an influence on security level of the line from making a failure. Authors of this article defined following tasks: to make evaluation of each working place of the line; to develop list of designations for possible risks of assembly; to develop mathematic model for calculation of general risk level. During implementation process was evaluated process of oscillating system assembly for washing machines. Interpretation of results of risk evaluation executed. Algorithm for risks clustering is described with determination of most critical assembly operations, which are leading to high quality risks and financial losses, needed for risk elimination. Usage of described methodic gives opportunity to improve general risk level to secure the line from quality failures, as a result to improve quality of the final product.
HARMONIZATION OF TECHNOLOGICAL AND ENVIRONMENTAL STANDARDS FOR RADIO-ELECTRONIC INDUSTRIAL SYSTEMS WITH USING OF GEOINFORMATION TECHNOLOGIES
Authors: Zhilnikova N. A. , Shishkin I. A.
Published: July 2019

Elaboration of technological and environmental standards for development of high-tech electronic production systems is regulated by significantly changed environmental legislation. This article considers the basic principles, structure and methods of ensuring the competitive development of electronic production systems in conditions of their modernization and new construction by a regional-basin approach with using geo-information systems. The methodology for harmonization of standards, taking into account the ecological capacity and multidimensionality of natural-industrial complexes is proposed. This methodology is based on results of multi-years researches and criteria developed by authors determining for quotas distribution of permissible load within territorial-industrial complexes applying sector wide approach. The ranking of all major industries in natural production complex predetermined the need for harmonization of social and environmental requirements with production characteristics of developing industries and individual production complexes. To solve these tasks, the algorithm and methodology for harmonizing the two key blocks “technological” and “environmental” within territorial natural production complex is proposed. The harmonization criteria are defined, the algorithm for constructing a simulation model of territorial natural production complex and the structure of information software are developed.
Penggunaan sabun lemon grass essensial terhadap kulit berjerawat pada mata kuliah perawatan wajah elektrik
Authors: Juniastuti Eni , Yuswati Yuswati , Novita Elok
Published: July 2019

Penelitian ini bertujuan untuk mengetahui (1) Pengaruh penggunaan sabun terhadap kulit berjerawat; (2) Efektifitas penggunaan sabun untuk perawatan kulit wajah berjerawat; 3) Kendala-kendala yang dihadapi dalam penggunaan; (4) Hasil akhir perawatan wajah elektrik pada kulit berjerawat dengan pemakaiaan sabun. Desain penelitian quasi eksperimen dilaksanakan di Laboraturium Rias Jurusan Pendidikan Boga dan Busana dengan membagi dua kelompok eksperimen dan kontrol. Subyek penelitian adalah semua mahasiswa rias yang memiliki kondisi kulit berjerawat dengan teknik purposive sampling. Hasil penelitian ini menunjukan (1) Penggunaan sabun memiliki pengaruh sebesar 88.63% untuk kondisi jerawat dan kondisi minyak 89.28 % pada kulit berjerawat; (2) Efektifitas penggunaan sabun pada masa penyembuhan jerawat 87.5 % lebih cepat waktu yang dibutuhkan; (3) Kendala yang sering muncul pada proses pemakaian meliputi faktor menstrulasi, pola makan, kurang istirahat dan pemakaian make up yang terlalu lama pada wajah; (4) hasil akhir perawatan wajah yang menggunakan sabun lemon grass essensial 89.28% dinyatakan berhasil mengurangi jerawat, kondisi minyak dan mempercepat masa penyembuhan jerawat. Dapat disimpulan bahwa penggunaan sabun berpengaruh terhadap kulit berjerawat pada mata kuliah perawatan wajah elektrik.AbstractThis study aims to determine (1) the effect of using soap on acne prone skin; (2) Effectiveness of using soap for acne-prone facial skin care; 3) Usage Constraints; (4) Final of result electrical facial care on acne prone skin with the use of soap. The quasi-experimental research design was carried out in the Cosmetology Laboratory of the Department of Culinary and Fashion Education by dividing the two experimental and control groups. The research subjects were all Cosmetology’s students who had acne prone skin with purposive sampling technique. The results are (1) The use of soap has an effect of 88.63% for acne conditions and oil conditions 89.28% on acne prone skin; (2) Effectiveness of the use of soap during acne healing period 87.5% faster time needed; (3) Constraints that often in the process of use include menstrual factors, dietary habit, rest deffiency and the use of makeup that is too long on the face; (4) the final result of facial treatment using essential lemon grass soap 89.28% was successful in reducing acne, oil conditions and accelerating the healing period of acne. It can be concluded that the use of soap has an effect on acne-prone skin in electric facial care courses.
TINGKAT KEMAMPUAN FOREHAND GROUNDSTROKE DAN BACKHAND GROUNDSTROKE SISWA SEKOLAH TENIS MENOREH TENNIS CLUB, HANDAYANI TENNIS CLUB DAN BANTUL TENNIS CAMP
Authors: Ngatman Ngatman , Sulistyatna Erman
Published: July 2019

ABSTRAKTeknik forehand groundstroke dan backhand groundstroke merupakan salah satu teknik yang sangat penting dalam permainan tenis lapangan. Petenis kebanyakan kehilangan angka karena tidak menguasai teknik forehand groundstroke dan backhand groundstroke dengan baik. Penelitian ini bertujuan untuk mengetahui tingkat kemampuan forehand groundstroke dan backhand groundstroke padasiswa sekolah tenis Menoreh Tennis Club, Handayani Tennis Club dan Bantul Tennis Camp.Penelitian ini menggunakan metode survei dengan teknik pengumpulan data menggunakan tes dan pengukuran. Instrumen yang digunakan dalam penelitian ini adalah Dyer Tennis Test. Validitas instrumen Dyer Tennis Test antara 0,80 sampai 0,90 dan reliabilitas instrumen adalah 0,90. Subjek dalam penelitian ini adalah seluruh siswa sekolah tenis Menoreh Tennis Club, Handayani Tennis Club dan Bantul Tennis Camp sebanyak 32 siswa, terdiri dari 20 siswa laki-laki dan 12 siswa perempuan.Hasil penelitian menunjukkan bahwa tingkat kemampuan forehand groundstrokes siswa sekolah tenis Menoreh Tennis Club, Handayani Tennis Club dan Bantul Tennis Camp berkategori “sedang”. Secara terperinci terdapat 2 siswa (6,25%) berkategori “baik sekali”, 5 siswa (15,63%) berkategori “baik”, 15 siswa (46,87%) berkategori “sedang”, 8 siswa (25%) berkategori “kurang” dan 2 siswa (6,25%) rendah. Rata-rata tingkat kemampuan backhand groundstrokes berkategori “sedang”, dengan rincian terdapat 2 siswa (6,25%) berkategori “baik sekali”, 8 siswa (25%) berkategori “baik”, 12 siswa (37,5%) berkategori “sedang”, 8 siswa (25%) berkategori “kurang” dan 2 siswa (6,25%) berkategori “rendah”. Rata-rata tingkat kemampuan forehand groundstroke dan backhand groundstroke berkategori “sedang”, dengan rincian terdapat  2 siswa (6,25%) berkategori “baik sekali”, 5 siswa (15,63%) berkategori “baik”, 15 siswa (46,87%) berkategori “sedang”, 8 siswa (25%) berkategori “kurang” dan 2 siswa (6,25%) rendah.Penelitian ini menunjukkan bahwa tingkat kemampuan forehand groundstroke dan backhand groundstroke siswa sekolah tenis Menoreh Tennis Club, Handayani Tennis Club dan Bantul Tennis Camp berkategori sedang. Kata kunci: forehand groundstrokes, backhand groundstrokes, siswa sekolah tenis, dyer tennis test
Trends in Quality of Care for Patients with CKD in the United States
Authors: Tummalapalli Sri Lekha , Powe Neil R. , Keyhani Salomeh
Published: July 2019

Background and objectives

Improving the quality of CKD care has important public health implications to delay disease progression and prevent ESKD. National trends of the quality of CKD care are not well established. Furthermore, it is unknown whether gaps in quality of care are due to lack of physician awareness of CKD status of patients or other factors.

Design, setting, participants, & measurements

We performed a national, serial, cross-sectional study of visits to office-based ambulatory care practices for adults with diagnosed CKD from the years 2006 to 2014. We assessed the following quality indicators: (1) BP measurement, (2) uncontrolled hypertension, (3) uncontrolled diabetes, (4) angiotensin-converting enzyme inhibitor or angiotensin receptor blocker use among patients with hypertension, (5) statin use if age ≥50 years old, and (6) nonsteroidal anti-inflammatory drug use. Using multivariable linear regression and chi-squared analysis, we examined the change in quality performance over time.

Results

Between 2006 and 2014, there were 7099 unweighted visits for patients with CKD representing 186,961,565 weighted visits. There was no difference in the prevalence of uncontrolled hypertension (>130/80 mm Hg) over time (46% in 2006–2008 versus 48% in 2012–2014; P=0.50). There was a high prevalence of uncontrolled diabetes in 2012–2014 (40% for hemoglobin A1c >7%). The prevalence of ACEi/ARB use decreased from 45% in 2006–2008 to 36% in 2012–2014, which did not reach statistical significance (P=0.07). Statin use in patients with CKD who were 50 years or older was low and remained unchanged from 29% in 2006–2008 to 31% in 2012–2014 (P=0.92).

Conclusions

In a nationally representative dataset, we found that patients with CKD had a high prevalence of uncontrolled hypertension and diabetes and a low use of statins that did not improve over time and was not concordant with guidelines.
Sadness empathy facilitates prosocial lying
Authors: Xu Li , Chen Guopeng , Li Biqin
Published: July 2019

We investigated whether sadness empathy influences prosocial lying. The 139 participants were randomly assigned based on gender to 2 groups according to the event that they read about—sadness empathy priming or neutral—and they then completed a deception game and 2 empathy
scales. The results showed that participants' prosocial lying frequency was higher in the sadness empathy-priming condition than the neutral event condition. The perspective-taking component of trait empathy moderated the event's main effect; however, there were no significant gender differences
in prosocial lying frequency, and both men and women who experienced another's sadness told prosocial lies to show benevolence. The facilitating effect emerged only in those who had a greater ability to take another person's perspective. The findings indicate that people with sadness empathy,
especially those with a strong perspective-taking ability, express their kindness by means of prosocial lying when they communicate with a sad person.
AS CIÊNCIAS SOCIAIS E AS TEORIAS DAS RELAÇÕES INTERNACIONAIS: RELAÇÕES A PARTIR DO PENSAMENTO COMPLEXO
THE SOCIAL SCIENCES AND THE THEORIES OF INTER-NATIONAL RELATIONS: RELATIONS FROM COMPLEX THINKING
Authors: Cuogo Francisco
Published: July 2019

O presente artigo desenvolve uma análise acerca das teorias das Relações Internacionais, sugerindo que as teorias pós-positivistas emergiram com sucesso, no último quarto do século XX, por causa das transformações ocorridas no campo das Ciências Sociais. Mais especificamente, aponto que o destaque dado à Teoria da Complexidade e às ideias oriundas do Pensamento Complexo, que fortemente impactaram os campos científicos e educacionais naquele período, foram também responsáveis pelo avanço do campo teórico pós-positivista nas Relações Internacionais. Para desenvolver essa hipótese organizo o artigo em três partes. Na primeira, discorro acerca da relação entre as Ciências Sociais e as Relações Internacionais, abordando a influência do pensamento complexo nas ciências. Na segunda, contextualizo a Teoria da Complexidade através de três principais autores, quais sejam: Capra, Morin e Maturana. E, ainda, relaciono o campo das Relações Internacionais com o Pensamento Complexo. Na terceira parte justifico como as abordagens pós-positivistas das Relações Internacionais estão em congruência com as transformações que afetaram o mundo ocidental a partir do o último quarto do século XX, quando, também, emergiram abordagens epistêmicas e metodológicas que sustentavam a compreensão dos fenômenos da sociedade contemporânea a partir de um olhar sistêmico e complexo – e não segundo a lógica cartesiana até então predominante nas teorias das ciências sociais. E, assim, evidencio que a multidisciplinaridade do campo das Relações Internacionais encontra no paradigma da complexidade um fundamento profícuo para a formulação de suas teorias e para a construção de suas análises científicas.
Avoidance of Double Taxation in the Area of Income Tax in Latvia
Authors: Lazdiņš Jānis , Ketners Kārlis
Published: July 2019

The article is dedicated to the experience of preventing double taxation in the Republic of Latvia, the area of income tax. This topic is made relevant by the tax reform implemented in 2018. Although the payment of income tax has been conceptually changed, the authors propose the thesis regarding a constant approach to prevention of double taxation, based on recommendations by the Organisation for Economic Co-operation and Development (hereinafter – OECD). In the framework of income tax reform, additional requirements have been integrated into regulatory enactments to eliminate the possibility of tax evasion.
Collateral in Public Register as a Security of Private Debt
Authors: Rozenfelds Jānis
Published: July 2019

This article deals with approaches to establishment of the collateral. Registration in public registers is a precondition to establish a mortgage and a commercial pledge, where the first one is recorded in the Land Register, while the second – in the Register of Commercial Pledges. Unlike the mortgages, execution of rights to a commercial pledge depends not only on registration, but also on whether a pledgee has taken actual possession of property. Taking of possession has not been expressly set forth by Latvian laws. It is necessary to specify the moment in legal acts when the pledged property was actually taken into possession. The subject of a mortgage is immovable property. The subject of a commercial pledge is movable property. Immovable property cannot be the subject of a commercial pledge. Distinction between movable and immovable property may lead to a situation when a holder of the commercial pledge loses the collateral due to the fact that the subject of pledge, once moveable, has turned into immovable property. The collateral is also endangered by the fact that public reliability is not necessarily always attributed to all public registers in all situations. Legal regulation of the register of commercial pledges more corresponds with the principle of public reliability. This principle, however, is not clearly defined for land registers and is variously interpreted by courts, thus leaving negative influence upon the stability of pledge rights. It is highlighted in Latvian law that existence of the collateral depends on whether there is a claim secured by a pledge (accessoriness). Current practise differs from that in the interwar period in Latvia. The difference lies within such secured claims that cannot be executed by force due to the limitation period or other reasons. Such changes in practise have led to the situation when secured claims may not be executed in case of insolvency of a debtor if the creditor has been in default to apply his claim within the term set by the insolvency administrator.
Trasplante hepático en un centro de Colomba: comparación de dos periodos
Authors: Santos-Sánchez Oscar Mauricio , Muñoz Octavio Germán , Marín-Zuluaga Juan Ignacio , Restrepo Gutiérrez Juan Carlos
Published: July 2019

Objetivo: el trasplante hepático es el tratamiento de elección para la falla hepática aguda y crónica. Los resultados en el trasplante hepático han mejorado en los últimos años, así que el objetivo de nuestro trabajo es comparar la experiencia de un centro en Colombia en dos períodos de tiempo diferentes.

Pacientes y métodos: estudio descriptivo retrospectivo donde se analizaron pacientes adultos con primer trasplante hepático en dos períodos; serie 1, entre 2004-2010 (241 pacientes); y serie 2, entre 2011-2016 (142 pacientes).

Resultados: la edad promedio fue de 54 años, el 57 % eran hombres y con un puntaje Model for End-stage Liver Disease (MELD) promedio de 20, sin cambios significativos en las características del donante y del receptor en los dos períodos. Las principales indicaciones de trasplante hepático fueron cirrosis por alcohol, cirrosis criptogénica y cirrosis por hepatitis autoinmune, con una disminución de los casos de hepatitis B y C en la serie 2. El 30 % de los pacientes tenía hepatocarcinoma. La supervivencia de los pacientes a 1 año fue de 81 % frente a 91 % y a 5 años fue de 71 % frente a 80 %, respectivamente. Las principales causas de muerte fueron: cáncer, enfermedad cardiovascular y sepsis. Existió un incremento significativo en las complicaciones biliares, sin diferencias en las complicaciones infecciosas, vasculares y el rechazo celular entre los dos períodos.

Conclusión: el trasplante hepático en este centro en Colombia se relaciona con excelentes resultados a corto y mediano plazo, con una mejoría significativa en la supervivencia de los pacientes en los últimos años y con resultados similares a los reportados en otros centros del mundo.
Cirugía mínimamente invasiva transanal (TAMIS): técnica y resultados de la experiencia inicial
Authors: Castaño Llano Rodrigo , Puerta Díaz Juan Darío , Palacios Fuenmayor Luis José , Uribe Moreno Diego
Published: July 2019

Antecedentes: la cirugía transanal endoscópica es un abordaje mínimamente invasivo recientemente descrito, que provee una exposición superior y permite el acceso a las lesiones del recto en toda su extensión. Además, provee un riesgo menor de compromiso de los márgenes de resección, menores tasas de recurrencia y una menor morbimortalidad en comparación con la escisión transanal convencional o las remociones endoscópicas. Objetivos: se pretende describir la experiencia inicial y los resultados con la cirugía transanal mínimamente invasiva (transanal minimally invasive surgery, TAMIS) en términos de resecciones completas y posibles complicaciones relacionadas con el procedimiento. Materiales y métodos: esta una serie de casos con un seguimiento prospectivo de los pacientes con TAMIS. Se analizaron los resultados de 27 pacientes intervenidos en varios centros de Medellín, Colombia, entre enero de 2012 y diciembre de 2016, realizados con cirugía laparoscópica monopuerto (single-port laparoscopic surgery, SILS) (21 casos) o el GelPOINT® Path (6 casos), junto con el apoyo de la óptica del laparoscopio (16 pacientes) y del endoscopio flexible (11 pacientes). Resultados: se realizaron 27 TAMIS en el mismo número de pacientes, 10 mujeres (37 %) y 17 hombres fueron evaluados. Se realizó un seguimiento a los pacientes durante aproximadamente 12 meses, en promedio 32 meses. La edad promedio fue de 68 años (52-83 años). El tamaño promedio del tumor fue de 5,3 cm (2-9 cm) y la distancia promedio desde el margen anal fue de 7 cm (5-9 cm) Las complicaciones posoperatorias se dieron en 6 casos (22 %) Una perforación rectal se corrigió por vía laparoscópica en el mismo acto quirúrgico y otra por la misma vía transanal. Una estenosis rectal se manejó con dilatación digital, y hubo un caso de sangrado rectal menor, uno de retención urinaria y un paciente presentó un cáncer rectal avanzado a los tres meses de la resección con margen microscópico positivo (4 %). No hubo reingresos. La mortalidad por la intervención fue nula. La patología operatoria reportó la presencia de adenoma de bajo grado en 3 casos (11 %), de alto grado en 11 (41 %), adenocarcinoma in situ en 6 (22 %), tumor neuroendocrino en 5 pacientes (18 %), 1 caso de fibrosis cicatricial (4 %) y 1 de leiomioma (4 %). Limitaciones: los resultados no son extrapolables a la población general debido al poco número de intervenciones y la ejecución limitada a solo dos autores. Conclusiones: en nuestra experiencia inicial, TAMIS es un procedimiento mínimamente invasivo con una baja morbilidad posoperatoria, es curativa para lesiones benignas y para pacientes seleccionados con cáncer temprano.
La piel como espejo del tracto gastrointestinal
Authors: Gómez Zuleta Martín Alonso , Lúquez Mindiola Adán , Olmos Lina María
Published: July 2019

Se presentan 4 casos de sangrado digestivo cuyas manifestaciones en la piel permitieron orientar el diagnóstico antes de la endoscopia, lo cual muestra la importancia de realizar un buen examen físico en todos los pacientes y no solo centrarse en los exámenes.
Rainfall-runoff simulations in the Lukovska River Basin with the HEC-HMS model
Authors: Eric Ranka , Todorovic Andrijana , Plavsic Jasna , Djukic Vesna
Published: July 2019

Hydrologic models are important for effective water resources management at a
basin level. This paper describes an application of the HEC-HMS hydrologic
model for simulations of flood hydrographs in the Lukovska River basin. Five
flood events observed at the Mercez stream gauge were available for
modelling purposes. These events are from two distinct periods and two
seasons with different prevailing runoff generation mechanisms. Hence the
events are assigned to either ?present? or ?past?, and ?spring? or ?summer?
group. The optimal parameter sets of each group are obtained by averaging
the optimal parameters for individual events within the group. To assess
model transferability, its applicability for simulation of flood events
which are not considered in the model calibration, a cross-validation is
performed. The results indicate that model parameters vary across the
events, and that parameter transfer generally leads to considerable errors
in hydrograph peaks and volumes, with the exception of simulation of summer
events with ?spring? parameters. Based on these results, recommendations for
event-based modeling are given.
Fruit and Vegetable Intake and Risk of Posttransplantation Diabetes in Renal Transplant Recipients
Authors: Gomes-Neto António W. , Osté Maryse C.J. , Sotomayor Camilo G. , v.d. Berg Else , Geleijnse Johanna M. , Gans Reinold O.B. , Bakker Stephan J.L. , Navis Gerjan J.
Published: July 2019

OBJECTIVE

Posttransplantation diabetes mellitus (PTDM) contributes to risk for cardiovascular morbidity and mortality in renal transplant recipients (RTRs). In the general population, consumption of a diet containing few fruits and vegetables predisposes to type 2 diabetes. The role of diet as a potential modifiable risk factor for PTDM has not been explored. Our focus was to investigate the prospective associations of fruit and vegetable intake with risk of PTDM in stable RTRs.

RESEARCH DESIGN AND METHODS

We included 472 adult RTRs who had a functioning graft ≥1 year. Fruit and vegetable intake was assessed by using a 177-item food frequency questionnaire. PTDM was defined according the American Diabetes Association’s diagnostic criteria for diabetes.

RESULTS

During 5.2 years of follow-up, 52 RTRs (11%) developed PTDM. Fruit intake was not associated with PTDM (hazard ratio [HR] 0.90 [95% CI 0.79–1.03] per 2log g/day; P = 0.13), whereas vegetable intake was inversely associated with PTDM (HR 0.77 [95% CI 0.63–0.94] per 2log g/day; P = 0.009). Mediation analyses revealed that ±50% of the association between vegetable intake and PTDM was mediated by variations in key components of the metabolic syndrome (i.e., HDL cholesterol, triglycerides, and waist circumference) as determined by the National Cholesterol Education Program’s Adult Treatment Panel III Expert Panel.

CONCLUSIONS

In this study vegetable intake, but not fruit intake, was associated with lower risk of PTDM in RTRs, likely largely through beneficial effects on key components of the metabolic syndrome. These findings further support accumulating evidence that supports a recommendation of higher vegetable intake by RTRs.
Primena elektrofilterskog pepela modifikovanog sa getitom za uklanjanje As(v) iz vodenih rastvora
Authors: Karanac Milica , Đolić Maja , Veličković Zlate , Kamberović Željko , Pavićević Vladimir , Marinković Aleksandar
Published: July 2019

Cilj ovog rada je ispitivanje mogućnosti primene modifikovanog oblika elektrofilterskog pepela (eng. Fly ash, FA) sa železo(III)-hidroksidom (α–FeOOH) u obliku getita (G) za efikasno uklanjanje arsena iz otpadne vode. U okviru rada izvršena je sinteza u perforiranoj koloni i dobijen je novi adsorpcioni materijal označen kao FAG. Efikasnost adsorpcije As(V) ispitana je u laboratorijskim uslovima u šaržnom sistemu, varijacijom mase adsorbenta i temperature. Izvršena je karakterizacija FA i FAG primenom: rendgenske difrakcione analize (eng. X-Ray Difraction, XRD), metode adsorpciono/desorpcione izoterme adsorpcije gasa (eng. Brunauer–Emmett–Teller, BET) i infracrvene spektrometrije sa Furijeovom transformacijom (eng. Fourier-Transform Infrared Spectroscopy, FTIR). Maksimalni adsorpcioni kapacitet FAG adsorbenta za uklanjanje As(V), izračunat je primenom Lengmirovog modela i iznosi 32,35 mg g-1. Termodinamički parametri adsorpcije za FAG/As(V) ukazali su da je proces adsorpcije spontan i endoterman.
Türkiye’de İyi Oluş İle İlgili Yapılmış Araştırmaların Sistematik Olarak İncelenmesi
Authors: KARDAŞ Ferhat , YALÇIN İlhan
Published: July 2019

Bu araştırmanın amacı Türkiye’de iyi oluş kavramıyla ilgili 2000-2015 yılları arasında yapılmış araştırmaları incelemektir. Bu çerçevede “mutluluk”, “yaşam doyumu”, “psikolojik iyi oluş”, “öznel iyi oluş”  kavramları kullanılmış ve bir üniversitenin elektronik kütüphanesi, ULAKBİM ulusal veri tabanı ve internet arama motorlarından yararlanılarak araştırmalar belirlenmiş ve ulaşılan 265 çalışma araştırmaya dahil edilmiştir. Araştırma sonucunda iyi oluşla ilgili yapılan çalışmaların, incelenen yıllar açısından, büyük çoğunluğunun 2010-2015 yılları arasında yapıldığı, lise ve üniversite öğrencileri üzerinde yapılan araştırmaların daha fazla olduğu, deneysel çalışmaların ve model testi araştırmalarının sınırlı olduğu, araştırmaların çoğunluğunda beş maddeden oluşan Yaşam Doyumu Ölçeği’nin kullanıldığı, araştırmalarda çoğunlukla korelasyon, regresyon, t testi ve varyans analizlerinden yararlanıldığı, iyi oluşla çok sayıda farklı değişken arasında anlamlı ilişkilerin ortaya konulduğu belirlenmiştir.
Öğrenci ve Öğretmen Bakış Açısıyla Bilişim Teknolojileri ve Yazılım Dersi
Authors: Sarıkoz Ayşegül , Bangir Alpan Gülgün
Published: July 2019

Bu çalışmanın
amacı ortaokul Bilişim Teknolojileri ve Yazılım dersine ilişkin öğretmen ve
öğrenci görüşlerini ortaya koymaktır. Araştırma örneklemini Ankara’nın merkez
ilçelerinde öğrenim gören 691 öğrenci ile bu ilçelerde görev yapan 28 BT
öğretmeni oluşturmaktadır. Tarama modelinde yapılan bu araştırmada veriler hem
nicel hem de nitel olarak toplanmıştır. Öğrencilerin “problem çözme,
programlama ve özgün ürün geliştirme” standardına diğer standartlara göre düşük
oranda ulaştıkları ve bu konuya daha fazla süre ayrılmasını istedikleri; en
sevdikleri konunun “çoklu ortam uygulamaları”, en sevmediklerinin “donanım”
olduğu; dersin anlatıma dayalı işlenmesinden hoşlanmadıkları, bilgisayarda
uygulama yapmayı sevdikleri; öğrencilerin en çok yazılı sınav ve ders içi
performanslarıyla değerlendirildiği görülmüştür.
Eğitim Alanında Solomon Deneysel Deseni ile Gerçekleştirilen Çalışmaların İncelenmesi: Bir Tematik Analiz Çalışması
Authors: ZORLU Fulya , ZORLU Yusuf
Published: July 2019

Bu araştırmanın amacı, 1949-2016 yılları arasında eğitim alanyazınında Solomon Deneysel Deseni (SDD) kullanan makaleleri tematik içerik analizi yöntemi ile incelemektir. Araştırma kapsamında 24 makale incelenmiştir. Makaleler; araştırmanın amacı, uygulama yapılan eğitim alanı, örneklem bilgileri, veri analiz yöntemleri, araştırmalarda kullanılan öğrenme yöntemleri, Solomon deneysel deseni türü ve öneriler parametreleri dikkate alınarak incelenmiştir. SDD kullanılanarak yapılan makalelerin sınırlı sayıda olduğu görülmektedir. İncelenen makalelerde SDD’nin; üç gruplu (1 deney ve 2 kontrol grubu), dört gruplu (2 deney ve 2 kontrol grubu), beş gruplu (2 deney ve 3 kontrol grubu) ve altı gruplu (4 deney ve 2 kontrol grubu) olarak kullanıldığı tespit edilmiştir. Makaleler, eğitimde birçok farklı alanda ve birçok öğrenme yöntemi kullanılarak farklı eğitim seviyelerinde örneklemlerle yapılmıştır. İncelemede, çok az sayıda makalede karma araştırma yönteminin kullanıldığı ve nicel araştırma yaklaşımına göre nicel veri toplama tekniklerinin kullanıldığı belirlenmiştir. Ayrıca makalelerde tek yönlü varyans analizi ve t-testleri ile veriler analiz edilmiştir. Deneysel çalışmalarda SDD kullanılarak, öğrenme yöntem ve tekniklerinin etkisi daha iyi araştırılabilir.
Öğretmen Adaylarının Spiritüel İyi Oluş İle Yaşamda Anlam Değişkenlerinin Psikolojik Dayanıklılığı Yordaması: Bir Yapısal Eşitlik Modeli (YEM) Denemesi
Authors: EKŞİ Halil , BOYALI Cem , ÜMMET Durmuş
Published: July 2019

Bu çalışmanın amacı, öğretmen adaylarının spiritüel iyi
oluş ve yaşamda anlam düzeylerinin psikolojik dayanıklılığı yordamadaki rolünü
incelemektir. Çalışmada ilişkisel araştırma modeli kullanılmıştır. Araştırmanın
örneklemini Marmara Üniversitesi Atatürk Eğitim Fakültesi Pedagojik Formasyon
biriminde öğrenim görmekte olan 338 öğrenci (276 kadın ve 62 erkek)
oluşturmaktadır. Araştırmada veri toplama aracı olarak Kişisel Bilgi Formu,
Spiritüel İyi Oluş Ölçeği, Psikolojik Dayanıklılık Ölçeği ve Yaşamda Anlam
Ölçeği kullanılmıştır. Araştırmadan elde edilen veriler, SPSS 21.0 ve AMOS 20.0
programları kullanılarak analiz edilmiştir. Araştırmanın verilerinin
analizinde, spiritüel iyi oluş ve yaşamda anlamın psikolojik dayanıklılık
üzerindeki etkisi yapısal eşitlik modeli (YEM) yoluyla incelenmiştir. Yapısal
eşitlik modeli sonucuna göre, psikolojik dayanıklılığın spiritüel iyi oluş ve
yaşamda anlam tarafından anlamlı bir şekilde açıklandığı tespit edilmiş ve bu
değişkenler arasındaki ilişkiler örüntüsünü ortaya koyan modelin uyum indeksi
değerlerinin iyi uyum verdiği görülmüştür.
Twelfth Grade Kuwaiti Students’ Identification of Domain and Range in Graphical Representation of Function and the Meaning they Ascribe to them
Authors: Alajmi Amal H.
Published: July 2019

This research investigated twelfth grade students' performance in identification of domain and range of functions in a graphical representation. The study focused on four types of functions: polynomial, trigonometry, piecewise and discontinuous. The study also aimed to identify the meaning that students gave for the domain and range and how they identified them. To collect the data two instruments were used: a test and an interview. A sample of 216 students participated in the study. The results showed a low performance in identifying domain and range for functions in graphical representation. The T-test indicated a statistical difference in students’ performance in domain and range in favor of domain. The results indicated a statistically significant difference in students' performance among the different types of function. Tukey test showed that the difference was in favor of polynomial against the other types of function. Also there was a significant difference between trigonometry and piecewise items in favor of trigonometry. The interviews revealed that students’ meaning and common practices in identifying the domain and range reflected misunderstandings. Some of them highlighted that the domain is the x-axis and y-axis or the x-intercept and y- intercept. Others considered that the curve as the domain or the range.
Curva de secagem solar e avaliação físico-química da manga "Espada"
Authors: Coelho Bruno Emanuel Souza , Nascimento Mayane Mendes do , Carvalho Itamara Rayanny Bessa de , Sousa Karla dos Santos Melo de , Machado Neiton Silva , Figueiredo Neto Acácio
Published: July 2019

O Brasil foi o primeiro país da américa a cultivar a mangueira, e dentre as variedades mais cultivadas no nordeste têm-se a espada, esta é uma fruta que possui uma grande aceitação no mercado. A secagem de produtos agropecuários destaca-se como um dos meios de conservação mais promissores quando feita utilizando energia solar por ser um recurso barato, limpo, gratuito e abundante no Brasil. Diante do exposto, o objetivo deste estudo foi, avaliar a eficiência de um secador solar de baixo custo, para a secagem da manga cv. ‘Espada’ e os atributos do produto final obtido, visando levar esta tecnologia de baixo custo para o pequeno produtor, gerando mais uma fonte de renda. Para isso, as mangas foram submetidas à secagem solar e o fruto desidratado foi analisado quanto aos parâmetros físico-químicos: acidez, pH, sólidos solúveis, umidade, sólidos totais, vitamina C e de cor (L*, a* e b*). Os resultados demostram que a secagem solar na obtenção de manga-passa é uma alternativa viável, que proporciona um incremento nutricional e uma coloração mais atrativa ao produto, minimiza as percas pós-colheita, além de ser uma tecnologia com alto potencial para melhorar a renda dos agricultores familiares.
The relationship between multidimensional traffic locus of control and reckless driving behavior
Authors: Choi ByoungHee , Oh JuSuk , Park SunJin , Lee SoonChul
Published: July 2019

This study investigated the relationship between Traffic Locus of Control(T-LOC) and Reckless Driving Behavior, by using correlation analysis and a hierarchical regression for the data gathered through 294 adults. First, this study examined correlation analysis between T-LOC and Driving Behavior Determinants(DBD). As a result, “Self” and “Other drivers” factors of T-LOC were positively correlated with ‘Interpersonal Anger’ factor, “Vehicle/Environment” factor was positively correlated with ‘Avoiding Problems’ factor, and external “Fate” was positively correlated with ‘Avoiding Problems’, ‘Benefit/Stimulus Seeking’, ‘Interpersonal Anger’ and ‘Aggression’. Whereas, there was positively correlated between all T-LOC and ‘Interpersonal Anger’. The result to examine influence of T-LOC on Reckless Driving Behavior was showed that T-LOC had significant amount of explained variance on Speed Driving and Wild Driving of Reckless Driving Behavior. And this showed that Fate effected on all Reckless Driving Behavior. That is, drivers who think that an accident caused by a ‘fate’ which can’t be observed, unlike their actions, other drivers, vehicles and driving environments tend to drive more dangerously.
Mathematical study of Rayleigh waves in piezoelectric microstretch thermoelastic medium
Authors: Kumar Arvind , Abo-Dahab S. M. , Ailawalia Praveen
Published: July 2019

This paper is concerned with the study of propagation of Rayleigh waves in a homogeneous isotropic piezo-electric microstretch-thermoelastic solid half-space. The medium is subjected to stress-free, isothermal boundary. After developing a mathematical model, the dispersion curve in the form of polynomial equation is obtained. Phase velocity and attenuation coefficient of the Rayleigh wave are computed numerically. The numerically simulated results are depicted graphically. Some special cases have also been derived from the present investigation.
A Comparative Analysis of Artificial Intelligence-Based Methods for Fault Diagnosis of Mechanical Systems
Authors: Moghaddam Reihaneh Kardehi , Yazdan Navid Moshtaghi
Published: July 2019

The present research studied fault diagnosis of composite sheets using vibration signal processing and artificial intelligence (AI)-based methods. To this end, vibration signals were collected from sound and faulty composite plates. Using different time-frequency signal analysis and processing methods, a number of features were extracted from these signals and the most effective features containing further information on these composite plates were provided as input to different classification systems. The output of these classification systems reveals the faults in composite plates. The different types of classification systems used in this research were the support vector machine (SVM), adaptive neuro-fuzzy inference system (ANFIS), k-nearest neighbor (k-NN), artificial neural networks (ANNs), Extended Classifier System (XCS) algorithm, and the proposed improved XCS algorithm. The research results were reflective of the superiority of ANFIS in terms of precision, while this method had the highest process duration with an equal number of iterations. The precision of the proposed improved XCS method was lower than that of ANFIS, but the duration of the process was shorter than the ANFIS method with an equal number of iterations.
Enhancing the fuel economy of a plug-in series hybrid vehicle system
Authors: Saad Hussein Awad Kurdi
Published: July 2019

In this paper, the design and simulation of a hybrid vehicle with a fully functional driving model is presented. Actual velocities and desired velocities are compared and matched to get the optimum values of a vehicle. Fuel economy is calculated to get miles per gallon gasoline equivalent (MPGe). The MPGe for a hybrid vehicle is compared with the MPGe for a conventional vehicle to get the best MPGe in a hybrid car. A higher performance of output power of a vehicle is obtained.
Stress and Deformation Analysis of Clamped Functionally graded Rotating Disks with Variable Thickness
Authors: Thawait Amit K. , Sondhi Lakshman , Sanyal Shubhashis , Bhowmick Shubhankar
Published: July 2019

The present study reports the linear elastic analysis of variable thickness functionally graded rotating disks. Disk material is graded radially by varying the volume fraction ratios of the constituent components. Three types of distribution laws, namely power law, exponential law and Mori–Tanaka scheme are considered on a concave thickness profile rotating disk, and the resulting deformation and stresses are evaluated for clamped-free boundary condition. The investigation is carried out using element based grading of material properties on the discretized elements. The effect of grading on deformation and stresses is investigated for each type of material distribution law. Further, a comparison is made between different types of distributions. The results obtained show that in a rotating disk, the deformation and stress fields can be controlled by the distribution law and grading parameter n of the volume fraction ratio.
Experimental study on mechanical behavior of natural hybrid composites filled with ground nut shell ash
Authors: Jagadeesh V. , Venkatasubbaiah K. , Lakshumu Naidu A.
Published: July 2019

Nowadays, natural fiber reinforced polymer composites are widely used because of their advantageous properties like minimum density, maximum specific strength, low cost and easy availability. Manufacturing of natural fiber composite is easy as compared to the conventional methods. In the present scenario, due to an increasing interest in environmental consciousness with greenhouse effect, various industries have initiated the use of eco-friendly materials and are replacing hazardous materials with such eco-friendly materials. The present work aims to determine the tensile strength of okra and jute fibers reinforced in Epoxy LY-556 and XIN-100IN Resins. Okra fibers are developed from the stem of the plant of the Malvaceae family. Their use as reinforcement in polymer composites requires the basic knowledge of their mechanical properties. Jute fibers are developed from the best jute plants. The conclusions are based on their mechanical properties and behavior.
Finite element model updating using Lagrange interpolation
Authors: Asma F.
Published: July 2019

In this paper, an iterative finite element model updating method in structural dynamics is proposed. This uses information matrices and element connectivity matrices to reconstruct the corrected model by reproducing the frequency response at measured degrees of freedom. Indicators have been proposed to quantify the mismodelling errors based on a development in Lagrange matrix interpolation. When applied on simulated truss structures, the model gives satisfactory results by detecting and quantifying the defaults of the initial model.