bluuebunny/crossref_metadata_2025 huggingface dataset:
Impacto de la intensidad horaria de la estadística en las pruebas saber 11
Authors: Zuluaica Camilo Adrián , Yepes Guerra Adriana Del Pilar , Villa Ochoa Jhony Alexander , Guzmán Aguilar Diana Sirley
Published: January 2020

Introducción. En Colombia la Ley General de Educación dio la potestad a las instituciones educativas de organizar sus propios currículos acorde con los proyectos educativos institucionales. Con base en esta autonomía, algunas instituciones fragmentaron el área de matemáticas en asignaturas como estadística y geometría con distribución de tiempo semanal a cada una de ellas. Otras instituciones se organizan en temas y los desarrollan en momentos particulares del año escolar. En ese sentido, conocer los efectos que podrían tener una u otra organización en los procesos educativos representa un interés para profesores, investigadores e instituciones educativas. Objetivo. Determinar el efecto que la distribución de la intensidad horaria de la asignatura estadística podría tener en el desempeño de los estudiantes en la Prueba Saber 11° en instituciones educativas públicas de Medellín-Colombia. Materiales y métodos. Los datos se extrajeron de los resultados de Pruebas Saber 11. Se hizo ajuste de un modelo lineal con efectos mixtos. Resultados. Después de controlar el efecto institución, algunas variables específicas de los estudiantes sí inciden en los resultados obtenidos en matemáticas, pero la distribución de la intensidad horaria que se dedica a la enseñanza de la estadística no es un factor significativo. Conclusiones. La distribución del tiempo e intensidad horaria dedicada a la estadística no tiene un efecto automático ni inmediato en el desempeño de los estudiantes, las instituciones deben considerar estrategias para promover competencias de los estudiantes acordes con su condición económica y social.
Marnotrawstwo żywności w Polsce
Authors: Bednarczuk Aleksandra , Śleszyński Jerzy
Published: January 2020

Artykuł omawia marnotrawstwo żywności ze szczególnym uwzględnieniem sytuacji w Polsce. W artykule zwrócono uwagę na trudności związane z definiowaniem problemu i gromadzeniem adekwatnych danych statystycznych. Celem artykułu jest przedstawienie problemu marnotrawstwa żywności w Polsce. Zastosowano metodę opisową z wykorzystaniem stosunkowo nielicznych informacji dotyczących skali problemu i prób jego rozwiązania. Podstawowe wnioski dotyczą niepokojącej skali marnotrawstwa żywności w Polsce i konieczności opracowania spójnej z polityką Eurostatu metodyki gromadzenia i prezentacji danych o odpadach żywnościowych.
Obecne użytkowanie dawnych gatunków pszenic
Authors: Dostatny Denise , Babalski Mieczysław , Ciępka Aleksander , Podyma Wiesław
Published: January 2020

Spośród uprawianych przez człowieka roślin, ze względów ekonomicznych i rolniczych zboża są najważniejszą grupą roślin uprawnych. Zboża, a zwłaszcza wyrabiany z nich chleb, są głównym i podstawowym produktem spożywczym na świecie. Pradawne gatunki oplewionych pszenic samopszy (Triticum monococcum) i płaskurki (Triticum dicoccum), od momentu ich udomowienia, stanowiły przez tysiąclecia podstawę diety człowieka. Było tak do momentu upowszechnienia się pszenicy zwyczajnej. W niektórych regionach świata są uprawiane do dzisiaj, a ze względu na rosnącą popularność zdrowej żywności rośnie ponowne zainteresowanie tymi dawnymi zbożami. Wiąże się to z dostosowaniem technik ich uprawy do warunków współczesnego rolnictwa konwencjonalnego i ekologicznego. W niniejszym artykule zostały omówione wyniki badań nad agrotechniką ekologicznej uprawy dawnych gatunków pszenic: samopszy i płaskurki. Pszenice oplewione są odporne na różne czynniki stresu biotycznego i abiotycznego i mogą być uprawiane w słabych warunkach glebowych, co zapewnia rolnikowi przewagę nad innymi uprawami. Daje to również producentom możliwość zagospodarowania niewykorzystanych nisz na rynku.
Out-of-sample analysis of international reserves for emerging economies with a dynamic panel model
Authors: Jung Kuk , Pyun Hyun
Published: January 2020

Using data on 70 emerging countries for 1990-2011, we re-examine the validity of both traditional and recently proposed determinants of international reserves. The dynamic panel model considers panel unit root, endogeneity, and country heterogeneity and reveals that not only traditional determinants but also new financial variables - M2/GDP and foreign capital inflows through over-the-counter markets - have significant effects on reserves hoarding. More importantly, out-of-sample forecasts show that the dynamic model yields the best goodness-of-fit, and its predicted values successfully account for the recent patterns in reserve accumulations.
Design of new clean and efficient combustion mode and thermodynamics research using NSGA-II algorithm
Authors: Shen Guoqing
Published: January 2020

In order to study a new clean and efficient combustion mode, which can relieve the pressure of traditional energy and ensure low emissions, in this study, a diesel/natural gas dual fuel engine is designed by non-dominant sorting genetic algorithm (NSGA-?), and its thermodynamic characteristics are studied. The WP10.290 Diesel engine is modified into a diesel/natural gas dual fuel engine. The emissions of harmful substances and thermal efficiency of the modified engine under different working conditions are compared. The combustion chamber structure and adaptability between combustion chamber and injection parameters are optimized by using NSGA-II algorithm and CFD software. The results show that the emission of NOx and CH4 and the fuel consumption rate can be reduced simultaneously by using the composite combustion model compared with the original engine. When the CH4 emission is close to zero, the fuel consumption rate decreases obviously, and NOx slightly increases. When the angle between the injection holes is 141.57? the amount of NOx in the cylinder is large. When the injection advance angle is 21.91?CA, the pressure in the cylinder is the highest, the CH4 production is the lowest, the NOx production is higher, and the oxygen content in the combustion mixture is less. The NOx production is the lowest. diesel/natural gas dual fuel engine can ensure efficient combustion while reducing emissions. In this study, the performance of the dual fuel engine at various speeds can be further studied, which can provide theoretical support for the design of diesel/natural gas dual fuel engine.
Research on collaborative control of double-plunger gas prover based on EtherCAT
Authors: Xu Zhipeng , Xu Feipeng , Xie Dailiang
Published: January 2020

Piston prover has been widely used as a gas flow standard for its advantages of high accuracy in standard volume, flow stability and repeatability. It has also been employed as the primary gas flow standard in many countries to calibrate meters. However, it is difficult to ensure the uniformity of the inside dimension of the piston, thus the application of conventional piston provers are limited by the maximum calibration flow generated by the piston cylinder volume. In this paper, an improved piston gas prover that mainly consists of two uniform plungers was proposed. Their external diameter constitutes the flow standard. The plungers are driven by servo motor, and the high speed fieldbus EtherCAT has been introduced as the control unit. Hence the two pistons could work collaboratively and operate in three modes: single-piston mode, double-pistons parallel mode, and double-pistons reciprocating mode. Besides generating steady-flow rate, the double-plunger prover can even produce an unsteady-flow rate which could be used to research the dynamic characteristics of flow meters. The structure and working principle of the three modes were carefully introduced. Then experiments for calibrating critical nozzles were carried out, and the results show that the repeatability of the discharge coefficient could be better than 0.06%, and the pressure fluctuation during the process was less than 50 Pa.
Menneskeverd og menneskerettighetsundervisning: En sosialsemiotisk multimodalitetsanalyse og drøfting av verdighetsbegrepet i filmen A Path to Dignity: The Power of Human Rights Education
Authors: Maagerø Eva , Valen-Sendstad Ådne
Published: January 2020

This chapter is an analysis and discussion of the globally popular human rights education film: A Path to Dignity: the Power of Human Rights Education. The film is produced by Ellen Bruno and is a cooperation with the UN department OHCHR and the human rights education organisations HREA and SGI. The film combines human rights education and dignity. Our research question is how human rights education and dignity is presented and understood in the film. The film is organized in three parts, and addresses Indian children, a Muslim woman and police in Australia. We have analysed the part about the young children in India. In our discussion of the film we have applied social semiotic theory and related analytical tools. We have analysed the representations, interactions and composition of the film. The result of the analysis shows a focus on the local situation of the children. Through human rights education the children experience a transformation in gaining a sense of dignity. This leads to a particular concern for others whose dignity is violated. The state that is responsible for their human rights is not addressed. The film presents human rights education with an interest for individual children, and dignity is understood morally, as responsibility for the other.
No mercy no dignity: Refleksjoner over et kunstnerisk utviklingsarbeid i Ål kyrkje
Authors: Thorsnes Tollef
Published: January 2020

This chapter discusses questions of dignity and mass migration addressed during the process of the making of a temporary art installation. The installation is located at “Ål kyrkje”, a church in Hallingdal in Norway. As the writer of this chapter I am both an artist making the installation and a researcher on my own art work. The chapter starts with an introduction to the concept “dignity” and a presentation of my understanding of the concept as open, dynamic and living. Different cultures and organizations assign different meanings to the concept of dignity. In my opinion, it is important to be aware of these different sunderstanding, and to try to find ways to communicate them openly and through dialog. Social semiotic theory is based on an understanding that all communication is social. This theory acknowledges the importance of roles that both the context and all the participants have in the communication. The main purpose of this chapter is to explore how I can make an art installation that does not give specific answers, but initiate visitors’ experiences, dialogues, reflections and new questions about mass migration and dignity.
Menneskeverdet i tre nyere tolkninger som placeholder, heuristisk og «flytende signifikant»
Authors: Valen-Sendstad Ådne
Published: January 2020

In this chapter I discuss three new ways, of understanding human dignity. First, Christopher McCrudden’s concern is with the fact that there is no common understanding of the concept. He argues that dignity is a placeholder. It is open to interpretations from a diversity of normative understandings, – religious and secular. Still, he argues for a core of overlapping content within the diversity of understandings. Second, Catherine Dupré understands human dignity as a heuristic concept, open for new interpretations. The concept is in itself inexhaustible. New meanings develop in confrontation with new issues. Observing that the concept has become one of the pillars in European law and democracies, and has been crucial in several junctions when dictatorships has fallen and democracies has been established after the Second World War, she finds that the concept comes to its right in particular in transitional and transformative situations. Finally, Costas Douzinas does not work with the concept human dignity but with the concept of the human, to whom human dignity is designated in the human rights. I reinterpret his theory to also cover the normative concept human dignity. It is brought into force by proclamations, and as such becomes a transformative and life changing concept in particular for people living in need of dignity.
Hidden Earthworks: Excavation and Protection of Offa’s and Wat’s Dykes
Authors: Belford Paul
Published: January 2020

Concerns over the condition of linear earthworks in north-east Wales have resulted in a series of projects undertaken by the Clwyd-Powys Archaeological Trust (CPAT). These have taken place on both Offa’s Dyke and Wat’s Dyke, and on parts of those monuments that are both legally protected (scheduled) and those which have no such protection. This article reports on two such projects, jointly funded by Cadw and the National Trust, which looked at Offa’s and Wat’s Dykes in 2018 and 2019. Excavations took place on unscheduled sections of both monuments where little above-ground evidence survived; in both cases the work revealed well-preserved sections of ditch and bank. Samples were recovered for palaeoenvironmental analysis and dating. The implications of these results for research and protection of the monuments in the future are discussed.
THE EFFECTS OF AMETHYST Datura metel (LINN, 1753) LEAVES EXTRACT AS AN ANESTHETIC AGENT ON HAEMATOLOGICAL CONDITION OF TILAPIA Oreochromis niloticus (LINN,1758) FRY
Authors: Palmi Revita Syefti , Yudha Indra Gumay , Wardiyanto Wardiyanto
Published: January 2020

Anesthetic method is an important component to support the activities of transporting live fish from one place to another for a long period of time. Cost efficiency and effectiveness of anesthetic ingredients that not cause residues in fish are factors to beconsidered as an anesthetic. Aim of this research is to study the effect of subletal concentration of amethyst leaf extract on the hematological conditions of tilapia fry after transporting on wet transportation systems. The research procedure was through the amethyst leaf extract toxicity test series (LC50-96 hours) to determine its sublethal concentration by 20% (0,297 ml/l), 30% (0,445 ml/l) and 40% (0,594 ml/l) of the LC50 value. The measured parameters are clinical symptoms, period of fainting and conscious recovery, hematological analysis, survival rate, and water quality. The results showed the concentration of amethyst leaf extract had an effect (P<0,05) on the period of fainting and the hematological component after transportation simulation. Results of water quality measurement showed the parameters of pH at 6 and ammonia 0,04 mg/l are not at the optimum value when fish transportation occur. The recommended concentration of amethyst leaf extract for use as an anesthetic agent is 0,445 ml/l
FEED ENRICHMENT WITH FISH OIL AND CORN OIL TO INCREASE EEL GROWTH RATE Anguilla bicolor (McCelland, 1844)
Authors: Sari Dewi Retno , Tarsim Tarsim , Hudaidah Siti
Published: January 2020

Eel (Anguilla bicolor) is an Indonesian freshwater commodity that has high economic value but has slow growth. One method to accelerate eel growth is through feeding with the enrichment of essential fatty acids. The aim of this research is to know the increase of growth rate of eel fish fed with the enrichment of essential fatty acids with fish oil and corn oil. The study used 3 treatments and 3 replications ie A (0% corn oil + 0% fish oil), B (1.5% corn oil + 1.5% fish oil), and C (3% corn oil + 3% fish oil). Parameters observed included specific growth rate, total feed consumption, feed efficiency, fat retention, and survival rate. The supporting parameter is water quality. The data obtained were analyzed by analysis of variance and continued by fisher test with 95% confidence interval. The results showed that there was a significant effect (P <0.05) on the growth rate of eel fish fed with the enrichment of essential fatty acids with fish oil and corn oil. Treatment C (3% corn oil + 3% fish oil) is the optimum dose because it has the best growth performance and best feed efficiency that is specific growth rate (4.67%), total feed consumption (262,9 g), feed efficiency (61% ), fat retention (2.805%), and survival rate (80%).
PEMANFAATAN EKSTRAK DAUN RAMBUTAN (Nephelium lappaceum L.) PADA TRANSPORTASI LOBSTER AIR TAWAR (Procambarus clarkii) DENGAN SISTEM KERING
Authors: Syamsunarno Mas Bayu , Syukur Abdul , Munandar Aris
Published: January 2020

Immotilization of live red swamp crayfish (Procambarus clarkii) in this research a used Nephelium lappaceum leaf extract as a natural anesthetic. The aims of this research were to determine the best concentration of the Nephelium lappaceum leaf extract as red swamp crayfish anesthesia and the optimum time of dry transportation system. This research method was an experimental laboratory with two replication with each concentration 0 ppm, 171 ppm, 294 ppm, 503 ppm, 863 ppm, 1479 ppm, 2535 ppm, 4345 ppm, and 7447 ppm. The study showed that the content of secondary metabolites from extracts of Nephelium lappaceum leaf were alkaloids, saponins, phenols hydroquinones, tannins, and flavonoids. The optimum concentration for anesthesia red swamp crayfish is 7447 ppm with passed out on 112 minutes and time conscious at 3 minutes. Dry transport time that produces the best survival rate was approximately 8 hours with the survival rate of 100%. The results of the measurement of the quality of the water before it extracts included, among others, the temperature of 29.2ºC, pH 5.9, DO 7.1 mg/L and TAN 0 mg/L. While the results of measurements of water quality after extracts included, among others, the temperature was 29ºC, pH 6.5, DO 6.8 mg/L, and TAN 0.026 mg/L.
STUDY OF USE FERMENTED BANANA Musa paradisiaca (Linnaeus, 1761) HUMPS AS ORGANIC FERTILIZER TO IMPROVE NATURAL FEED AVAILABILITY IN NURSERY OF HOVEN’S CARP Leptobarbus hoevenii (Bleeker, 1851) FRY
Authors: Rosyid Wahid Abdul , Yudha Indra Gumay , Yulianto Herman
Published: January 2020

Plankton as a natural feed is thought to be a factor that affects the growth of hoven’s carp fry. Plankton abundance can be increased by the addition of organic fertilizers containing nutrients (nitrate and phosphate). Nutrients abundance can be increased by addition of fermented banana hump’s This research aimed to determine the use of fermented banana’s hump to increase the availability of natural feed nursery and the growth of hoven’s carp fry. The method of this research used a completely randomized design with four treatments and three replications, i.e: P1 (control), P2 (5,0 ppm), P3 (7,5 ppm), and P4 (10,0 ppm) addition of fermented banana’s hump. The measured parameters were nitrate, phosphate, plankton abundance, growth and water quality. The results showed the dose of addition of banana weed fertilizer had an effect (P< 0.05) on the abundance of natural feed and the growth of hoven’s carp fry. Results of water quality measurement showed the parameters of temperature ranged from 25 to 27 °C, pH ranged from 6,23 to 7,53, DO ranged from 3,40 to 11,36 and ammonia from 0 to 0,001 mg/l. The recomended dosage of fermented banana’s hump was 10 ppm for 1 l of water media.
PENGARUH MODEL PEMBELAJARAN ROLE PLAYING TERHADAP KETERAMPILAN BERBICARA SISWA KELAS IV SD PADA PEMBELAJARAN BAHASA INDONESIA
Authors: Priatna Asep , Setyarini Ghea
Published: January 2020

Based on the results of field studies conducted by researchers, the quality of teaching and speaking of students in grade IV SDN Sukamaju is still less active in terms of speaking, they prefer to talk during lessons, do not want to ask questions, say nothing and if the teacher asks to speak, students are still stammering, embarrassed and doubtful. With this in mind, it can be seen that fourth-grade students still do not have the speaking skills, and it is difficult to communicate the information obtained. Researchers are learning to role-play learning models for class IV student learning in Indonesian language learning and for class IV students' understanding by applying role-playing learning models to speaking learning in Indonesian language learning. The method used in this study is a quantitative study kind of quasi experiment conducted on students in class IV SDN Sukamaju with a total of 42 students, consisting of IV A 21 people and class IV B 21 people. This research uses the Nonequivalent Control Group Design. Data The results of the study were obtained from interviews, tests, questionnaires, observations, and documentation. The average value of the post-test class using conventional learning has an average value of 74.90. In contrast, the experimental class that uses the role-playing model has an average value of 80.19. It can simplify learning by using role learning models that can help students in learning to read in learning Indonesian.
The Teaching Of Religious Moderation In The Arba’in Hadith Of Mahfuzh al-Tarmasi and The Arba'in Hadith Of Hasyim Ash'ari
Authors: Muqtada Muhammad Rikza
Published: January 2020

In the first of 20th century, there were two local hadith books written by two archipelago scholars whose teacher and student status, namely the al-Minhah al-Khairiyah fî Arba’îna Hadîtsan min Ahâdîtsi Khair al-Bariyyah by Mahfuzh al-Tarmasi (d. 1919/1920 AD) and the Arba’ûna Hadîtsan Tata’allaqu bi Mabâdi’u Jam’iyyatu Nahdlatu al-Ulamâ’ by Hasyim Ash'ari (d. 1947 AD). Both of books have a different theme structure from the Arba'in tradition books written by their teachers in the Middle East. For this reason, this paper focuses on how the writing context and the intelectual discourse are contained in the text. The two books of Arba’in hadith were written in order to counter wahabism that at that time attacked the religious thoughts and practices of the archipelago Muslims with the accusations of takfirism. The morality in these books is more directed to moderate the attitudes towards anyone, even against the enemy. As like Ritchey, yellow book or turats is an effective medium for moderating religious attitudes in Islam
Reinterpretation Of QS. al-A‘Râf [7]:11-25 On Hoax: Hermeneutics Study Of Ma’na-Cum-Maghza
Authors: Amir Abdul Muiz
Published: January 2020

This article examines the interpretation of QS. al-Araf [7]: 11-25 by dialoguing the story of the Success of Adam and social reality. Dialogue that discusses the issue of the history of hoax, the strategy of making hoax, the impact, and handling of hoax issues. This research uses qualitative with hermeneutics ma'na-cum-maghza  theory. This interpretation shows that hoax are phenomena that have existed since the beginning of human kind (Prophet Adam). The unfair contestation and an inability to accept differences caused the policy tendency. This hoax strategy is carried out through logical agreement and approving of oaths that seem right. How to handle habits can only be done through internalizing the nature of sincerity and waiting as a form of grace to accept all forms of diversity, and to cultivate a critical nature of all information received. Besides, the government also needs to take and resolve not only to provide punishment to the victims but also need to get rehabilitation to avoid prolonged depression
Cosmological Interpretation: A View of Wind Concept Shi’a Literature
Authors: Wendry Novizal
Published: January 2020

The debate over the origin of the wind between medieval scientists and theologians became a hot issue. Scientists that consist of philosophers based their arguments on empirical facts and theologians werebased on the revelation of al-Qur’an and Hadith. One of the medieval theologians was al-Majlisī (1037-1110/1627-98). He interpreted cosmological verses based on the process, categorization, and the term of al-Qur'an. This research is a library research usinga historical approach to obtain data and conducting content analysis. As for the term related to the Qur'an about wind, a semantic approach was used. Primary data was the work of al-Majlisī, Biḥār al-Anwar. The results of the study indicated that al-Majlisī rejected the astrological theory which stated that wind is a spin of air originating from the smallest particular composition of the earth, heated, and subjected to evaporation. According to al-Majlisī, the wind caused by God's willin power to blow it with the intensity that He desired. According to al-Majlisī, the wind can be distinguished whether it is beneficial or not as found in al-Qur'an
Member of the War and Academician (on the Centenary of the Birth of Academician K.S. Kolesnikov)
Authors: Shkapov P. M.
Published: January 2020

The article provides brief information about the main stages of the life and work of Academician Konstantin Sergeyevich Kolesnikov and the scientific and pedagogical school he created in the field of studying the dynamics and strength of machines, teaching mechanics at Bauman Moscow State Technical University.
Mathematical and Computer Modeling of Piezoelectric Generator for Energy Harvesting Devices
Authors: Soloviev A. N. , Ermakov D. A.
Published: January 2020

The paper deals with modeling a Piezoelectric Generator (PEG) that includes piezoactive elements, inertial mass, plate and rack. The PEG under consideration can be an element of the energy storage device in the capacity of the source of energy provided from vibrations of elements of structures and machines.

The main objective of the paper is to gain the PEG efficiency by finding the optimal geometric parameters for finding the highest output potential.

The elastic and piezoceramic media are modeled within the framework of the linear theory of electroelasticity. As a research tool, CAE package ACELAN is used in which three-dimensional and axisymmetric device models are built. The numerical experiments performed a modal and harmonic analysis that enabled us to identify the most effective operating frequencies.
Migración internacional y escolaridad como medios alternativos de movilidad social: el caso de México
Authors: Meza González Liliana , Pederzini Villarreal Carla
Published: January 2020

Este trabajo explora la relación entre migración y remesas con asistencia escolar y años de escolaridad de niñas y niños entre 11 y 19 años del sector rural mexicano. El análisis toma en cuenta la cultura migratoria del hogar y la comunidad, e incluye el efecto que el programa Oportunidades puede ejercer sobre las variables de escolaridad. Al estimar un sistema de ecuaciones simultáneas de migración y remesas con las 2 variables de educación, nuestros resultados sugieren que la experiencia migratoria, tanto del hogar como de la comunidad, inciden negativamente sobre la asistencia escolar y los años de escolaridad.
Una relación entre deuda pública externa y crecimiento económico
Authors: R. Casares Enrique
Published: January 2020

Se presenta un modelo de crecimiento endógeno con dos bienes, comerciable (manufacturero) y no-comerciable (no-manufacturero). El conocimiento tecnológico domestico es producido únicamente en el sector comerciable. Este conocimiento se desborda hacia el sector no comerciable. El gobierno emite deuda externa para financiar parte de su gasto en bienes comerciables. La tasa de interés doméstica es igual a la tasa de interés mundial más la prima de riesgo país. El riesgo país depende positivamente del nivel de la deuda pública externa. Los hogares piden prestado al exterior y tienen una restricción de crédito externo. Se obtiene, en el estado estacionario, una relación no lineal entre la proporción deuda pública externa a PIB y la tasa de crecimiento, en forma de U invertida. Hay evidencia empírica que muestra la existencia de esta no linealidad entre deuda pública y crecimiento, tanto para países en desarrollo como desarrollados.
Tratantes de arte y los grandes maestros de la pintura
Authors: Ponzio de León Carlos Alejandro
Published: January 2020

Se presenta un modelo sobre los contratos surgidos durante el Renacimiento entre pintores y los primeros tratantes de arte, así como las condiciones bajo las cuales el convenio de trabajo era ventajoso para ambos. El modelo explica por qué la relación funcionó adecuadamente para pintores menores y por qué los grandes maestros se mantuvieron al margen de dicha conexión. El modelo finalmente estudia la relación entre el número de pintores al servicio de un comerciante y los costos de mercadeo y promoción de la obra de arte.
¿Por qué los salarios de los inmigrantes mexicanos y sus descendientes son tan bajos en Estados Unidos?
Authors: Orraca Romano Pedro P. , García Meneses Erika
Published: January 2020

Se estudia el papel de la segregación ocupacional en los bajos salarios entre los inmigrantes mexicanos de primera, segunda y tercera generación en Estados Unidos. Los mexicano-americanos obtienen menores salarios que los negros porque poseen menor capital humano. Respecto a los blancos, sus salarios menores también son producto de sus retornos menores por sus características y porque se encuentran sub-representados en la cima de la estructura ocupacional. La segregación ocupacional constituye una parte importante de la brecha salarial entre nativos e inmigrantes mexicanos de primera generación. Para generaciones posteriores, la contribución de la segregación ocupacional varía entre grupos y de acuerdo con la descomposición utilizada.
Impacto de las modificaciones en el proceso de portabilidad numérica sobre los servicios de telecomunicación móvil
Authors: Escobar Briones Rebeca
Published: January 2020

Los costos de traspaso y los efectos de red pueden disuadir la competencia en los mercados de telecomunicaciones al crear un efecto encierro que reduce la movilidad de los consumidores entre los diferentes operadores. El tema ha sido investigado en el contexto internacional, pero hasta el día de hoy las conclusiones no han sido unánimes; además, en países como México, la investigación es escasa. El análisis aporta una estimación de los costos de traspaso para México en el periodo 2007-2016. Asimismo, se evalúa el impacto de los costos de traspaso decrecientes sobre la movilidad de los consumidores y la concentración de mercado, y se encuentra que tienen un efecto favorable.
Determinantes de la entrada de supermercados en México
Authors: Castañeda Alejandro , Ibarra Pedro
Published: January 2020

Se estiman modelos en forma reducida, con los beneficios como función de variables observables, para analizar los determinantes de la entrada de supermercados. Se encuentra que entre más concentrado este un mercado, medido con base en cadenas, es menos factible observar entrada al mismo. Adicionalmente, al controlar por concentración de mercado y analizar el impacto especifico por cadena se observa que un mayor número de tiendas Walmart incrementa la probabilidad de que haya cero o una tienda en el mercado relevante y disminuye la factibilidad de que haya dos o más tiendas. Para las demás cadenas se observa el resultado contrario
A study on student evaluating task competency from an admission officer’s perspective
Authors: Kim YeeJee , Lee KiHak
Published: January 2020

This study analyzed the characteristics of the perceived competency in student evaluating task from work experience, as well as observing the difference in the perceived importance of the skill and the actual performance level of the admission officers, based on the competence drawn. For this study, Study 1 used the concept map, while Study 2 used the IPA analysis method. In Study 1 conducted the multidimensional scaling (MDS) and hierarchical cluster analysis to rate the importance level of each core sentence. The analysis showed that a total of 93 core sentences were clustered into: (1) ‘the understanding of the student/major’, (2) ‘ability to evaluate the documents quickly, accurately, and insightfully’, (3) ‘vocation development through self-understanding’, (4) ‘Understanding of the high school curriculum and its characteristics’. Furthermore, the results of the importance rating showed that Cluster 3 (vocation development through self-understanding) showed the highest level of importance. Study 2 compared the perceived competency importance and the actual performance, using paired t-test. The results showed that from the 93 competency list, there were significant differences in 37 competencies; out of 37, 36 of them showed lower performance than the perceived importance in the specific competency. Finally, this study suggested its implications based on the results, as well as providing directions for future studies based on the study’s limitations.
When females are more risk aversive?
Authors: Shosaidova Dinara , Kwon Seungwoo , Park Jihye
Published: January 2020

Although the issue of gender differences in risk taking behavior has been an interesting issue of industrial and organizational psychology fields, there is no univocal agreement on this topic. In this paper, we try to find supportive evidence that gender affects risk-taking behavior that is moderated by the frame. In addition, we extend the previous findings by adding variables such as ambition, responsibility, and internal locus of control. As expected, gender and frame interact to influence risk-taking behavior, such that positively framed men are prone to take more risks, whereas negatively framed women prefer risk-taking options. In addition, ambition and the level of internal locus of control are positively related to risk-taking behavior, while responsibility level is negatively related to risk-taking behavior. The implications and limitations of findings are discussed.
The influence of demographic and cognitive diversity and personality factors on team performance
Authors: Roh YounHee , Sohn YoungWoo
Published: January 2020

The purpose of this study was to investigate the effects of team composition on team performance. A total of 67 student teams participated in their team-based task for more than 10 weeks and a team is an unit of analysis. The composition variables included demographic diversity (gender and college starting year), cognitive diversity, and Big Five personality factors. To test the hypothesis that there will be significant differences in team performance between three groups (low-, medium-, and high-diversity) varying with demographic (gender and college starting year) and cognitive diversity, one-way ANOVAs and post-hoc analyses were used. Findings regarding gender diversity revealed that team performance was greater for medium- and low-diversity groups than for high-diversity group. While findings regarding college starting year revealed that team performance was greater for low- and high-diversity groups than for medium-diversity group, findings regarding cognitive diversity measured by diversity of attending colleges revealed that team performance was greater for medium-diversity group than for high-diversity group. These findings suggest that there will be an optimal level of diversity for enhancing team performance. Then we examined the relationships between Big Five personality factors as team composition variables and team outcomes. Team extroversion showed positive relationships with the creative part and team presentation. However, the minimum of team agreeableness showed negative relationships with the logical part of team performance, which was the opposite of our hypothesis. We discussed that the personality factors for team composition could vary with task characteristics.
Mobile Health in Uganda: A Case Study of the
Medical Concierge Group
Authors: Kamulegeya Louis H. , Ssebwana Joseph , Abigaba Wilson , Bwanika John M. , Musinguzi Davis
Published: January 2020

The ubiquity of mobile phones offers an opportunity for a
paradigm change in health-care delivery, which may offer solutions to
some of the challenges faced by the health sector in Uganda. The Medical
Concierge Group (TMCG) is a digital health company, headquartered in
Uganda, which leverages on mobile phone-based platforms – such as short
messaging service (SMS), voice calling – and social media to deliver
health services. Just over two-thirds (68%) of users of TMCG’s services
are males between 18 and 30 years of age. SMS reminders have improved
the honouring of health facility appointments among HIV-positive
clients, from 60% to 90%; retention rates at supported health facilities
have improved from 45% to 89%. Furthermore, information dissemination
has been achieved via mobile SMS, wherein subscribers can access health
content on diverse topics – such as HIV/AIDS prevention and family
planning – by sending messages to a pre-defined short code to a phone
line. Over 900 beneficiaries have accessed health content via SMS
subscriptions. Social media platforms, including Facebook and Twitter,
are used for health information dissemination and have enabled a wider
reach to over 13 million beneficiaries accessing health information on
TMCG’s Facebook page alone. Tailoring mobile phone-based health content
to meet the target beneficiaries’ needs is critical for TMCG’s impact
and uptake. With rising rates of phone ownership and Internet
connectivity in Uganda, mobile phones offer an affordable and proven
adoptable avenue to overcome the chronic challenges faced by the health
sector.
Clinical characteristics, management and outcomes of patients with acute coronary syndrome and atrial fibrillation: real-world data from two nationwide registries in Italy
Authors: Lucà Fabiana , Caretta Giorgio , Vagnarelli Fabio , Marini Marco , Iorio Annamaria , Di Fusco Stefania Angela , Pozzi Andrea , Gabrielli Domenico , Colivicchi Furio , De Luca Leonardo , Gulizia Michele Massimo
Published: January 2020

Background

Atrial fibrillation is common in the setting of acute coronary syndromes (ACS) although its impact on ACS remains controversial.

Aim

To describe in-hospital management of patients with atrial fibrillation and ACS evaluating the impact of atrial fibrillation on in-hospital and mid-term outcome.

Methods

We analysed the data of two prospective multicentre nationwide registries (IN-ACS Outcome and MANTRA) to assess clinical characteristics, management, and outcomes of patients with ACS and atrial fibrillation. Study outcomes included death from any cause and a composite end-point of death/re-infarction/stroke/major bleeding within index admission and 6 months’ follow-up.

Results

Out of 12 288 ACS patients, 1236 (10.1%) had atrial fibrillation at admission or developed it during hospitalization. Atrial fibrillation patients were older, more often female, and had higher burden of comorbidities. In-hospital mortality was higher among atrial fibrillation patients (8.7 vs. 2.4%, P < 0.001). Patients with atrial fibrillation had a higher incidence of re-infarction (3.5 vs. 1.7%, P < 0.0001) and ischemic stroke (1.7 vs. 0.4%, P < 0.001) compared with those in sinus rhythm. Major bleedings were also more frequent among atrial fibrillation patients (1.9 vs. 0.9%, P < 0.001). In-hospital and at 6 months’ follow-up death from any cause occurred more often in atrial fibrillation patients than in those without atrial fibrillation (9.4 vs. 3.5%, P < 0.0001). At multivariable analysis, atrial fibrillation was an independent predictor of the in-hospital composite end-point (OR 1.67, 95% CI 1.35–2.06, P < 0.0001) but not at 6 months’ follow-up. The independent role of atrial fibrillation on the in-hospital composite end-point was also confirmed by propensity score analyses.

Conclusion

Atrial fibrillation was an independent predictor for adverse in-hospital outcome in ACS. This effect disappeared at mid-term follow-up, whereas noncardiac comorbidities emerged as prognostic factors of adverse outcomes.
Assessment of right ventricular function in advanced heart failure with nonischemic dilated cardiomyopathy: insights of right ventricular elastance
Authors: Bianco Francesco , Bucciarelli Valentina , Ammirati Enrico , Occhi Lucia , Musca Francesco , Tonti Giovanni , Frigerio Maria , Gallina Sabina
Published: January 2020

Background

The right ventriculoarterial coupling (R-V/A), a measure of right ventricular systolic dysfunction (RVSD) adaptation/maladaptation to chronic overload, and consequent pulmonary hypertension, has been little investigated in nonischemic dilated cardiomyopathy (NIDCM). We examined the correlates of R-V/A and traditional echocardiographic indices of RVSD, over the spectrum of pulmonary hypertension and tertiles of mean pulmonary artery pressures (PAPm).

Methods

In 2016–2017, we studied 81 consecutive patients for heart transplant/advanced heart failure. Inclusion criteria were NIDCM, reduced ejection fraction (≤40%) and sinus rhythm. R-V/A was computed as the RV/pulmonary elastances ratio (R-Elv/P-Ea), derived from a combined right heart catheterization/transthoracic- echocardiographic assessment [right heart catheterization/transthoracic-echocardiographic (RHC/TTE)].

Results

A total of 68 patients (mean age 64 ± 7 years, 82% men) were eligible. After adjustments, R-Elv and P-Ea were higher in isolated postcapillary-pulmonary hypertension (Ipc-PH) than combined-pulmonary hypertension (Cpc-PH) (P = 0.004 and P = 0.002, respectively), whereas R-V/A progressively decreased over Ipc-PH and Cpc-PH (P = 0.006). According to PAPm increment, P-Ea congruently increased (P-Trend = 0.028), R-Elv progressively decreased (P-Trend<0.00)1, whereas R-V/A significantly worsened (P-Trend = 0.045). At the multivariable analysis, a reduced RV longitudinal function (TAPSE<17 mm) was positively associated with R-V/A impairment (<0.8) [odds ratio 1.41, 95% confidence interval (CI) (1.07--1.87), P = 0.015]. R-Elv and P-Ea showed good interobserver reliability [interclass correlation (ICC) 0.84, 95% CI (0.32--0.99), P = 0.012 and ICC 0.98, 95% CI (0.93--99), P < 0.001, respectively].

Conclusion

Among NIDCM HF patients, in a small cohort study, RHC/TTE-derived R-V/A assessment demonstrated good correlations with pulmonary hypertension types and RV functional status. These data suggest that R-V/A encloses comprehensive information of the whole cardiopulmonary efficiency, better clarifying the amount of RVSD, with good reliability.
Age-related differences in the morphology of the impedance cardiography signal
Authors: Tronstad Christian , Høgetveit Jan Olav , Elvebakk Ole , Kalvøy Håvard
Published: January 2020

Impedance cardiography (ICG) is a non-invasive method of hemodynamic measurement, mostly known for estimation of stroke volume and cardiac output based on characteristic features of the signal. Compared with electrocardiography, the knowledge on the morphology of the ICG signal is scarce, especially with respect to age-dependent changes in ICG waveforms. Based on recordings from ten younger (20–29 years) and ten older (60–79) healthy human subjects after three different levels of physical activity, the typical interbeat ICG waveforms were derived based on ensemble averages. Comparison of these waveforms between the age groups indicates the following differences: a later initial upward deflection for the younger group, an additional hump in the waveform from many older subjects not presented in the younger group, and a more pronounced second wave in the younger group. The explanation for these differences is not clear, but may be related to arterial stiffness. Further studies are suggested to determine whether these morphological differences have clinical value.
KEANEKARAGAMAN LAMUN DAN MAKROZOOBENTOS SEBAGAI INDIKATOR KONDISI PERAIRAN PANTAI SINDHU, SANUR, BALI
Authors: Sara Wijana I Made , Ernawati Ni Made , Ayu Pratiwi Made
Published: January 2020

Sindhu Beach is part of the Sanur beach area. Sanur area is one of 11 strategic national tourism areas in Bali. Beach tourism activities have the potential to cause degradation of coastal ecosystems. Ecosystem changes can be determined using bioindicators. This study aims to determine the condition of the Sindhu Coast waters ecosystem based on seagrass diversity and macrozoobenthos as indicators. This research was conducted in November 2019 at Sindhu Beach. Seagrass observations and macrozoobenthos sampling were carried out at four stations with three replications at each station. Data and samples were collected using the quadratic transect method. Eight species of seagrass were found in Sindhu Beach with a percentage of cover between 16.33% - 63.37% and density between 1572 ind / m2 - 3314.4 ind / m2. The average value of the seagrass diversity index was 1.24, the average uniformity index was 0.78, and the average dominance index was 0.32. Types of macrozoobenthos found were 23 species with abundances ranging from 2.33 ind / m2 - 28.33 ind / m2. The average value of macrozoobenthos uniformity index is 1.50, the average diversity index is 0.68 and the average dominance index is 0.36. Based on the index value shows that the waters of Sindhu Beach are in good condition or there is no ecologically significant pressure.
Capital Expenditure Determinants in Central Java and East Java with Economic Growth as Moderating Variable
Authors: Hardiningsih Pancawati , Januarti Indira , Maryono Maryono , Srimindarti Ceacilia
Published: January 2020

This study aims to analyze the effect of local own revenue, balance funds and area size on capital expenditure with economic growth as a moderating factor for district / city governments in Central and East Java Provinces. The population in this study are all districts / cities in Central Java and East Java Province. This research uses census method. The secondary data used in this study is in the form of 2015-2017 APBD realization reports obtained from the Director General of Fiscal Balance of the Regional Government, while data on economic growth and area size were obtained from BPS of Central and East Java Provinces. The analysis technique uses structural equation models with Partial Least Square. The results showed that regional original income and balance funds had a significant positive effect on capital expenditure in Central and East Java. The area size has a positive and significant effect on capital expenditure for Central Java but not for East Java. Economic growth moderates the effect of regional income on capital expenditure. Economic growth moderates balance funds towards capital expenditure for Central Java but not for East Java. Overall there is no difference in capital expenditure across districts / cities in the two provinces
Manufacturing Corporate Life Cycle and Discretionary Accruals with Piecewise Linear Model
Authors: Indraswono Cahyo , Kurniawati Anggreni Dian
Published: January 2020

This study aimed to investigate the effect of life cycle at the critical point of the growth mature and mature-stagnant stages of discretionary accruals and the effect of company age on discretionary accruals. In addition, this study also examines the differences of discretionary accruals in growth-mature stage and mature-stagnant stage. The data observation in this study is financial statement data of 341 manufacturing companies listed on Indonesia Stock Exchange in 2015-2017. The dependent variable is discretionary accruals that focuses on the piecewise linear model and the independent variables are the life cycle and the company age. Life cycle grouped into two critical point stages, namely the growth-mature stage and the mature-stagnant stage. Multiple linear regression is used to test hypotheses. The results show that there is a negative effect on growth-mature and mature stagnant in critical points of the discretionary accruals and there is a positive effect on the company age on discretionary accruals. Moreover, this study also proves that there are differences in discretionary accruals at growth-mature stage and mature-stagnant stage.