bluuebunny/crossref_metadata_2025 huggingface dataset:
A theoretical model for predicting the Peak Cutting Force of conical picks
Authors: Kuidong Gao , Changlong Du , Hongxiang Jiang , Songyong Liu
Published: February 2019

In order to predict the PCF (Peak Cutting Force) of conical pick in rock cutting process, a theoretical model is established based on elastic fracture mechanics theory. The vertical fracture model of rock cutting fragment is also established based on the maximum tensile criterion. The relation between vertical fracture angle and associated parameters (cutting parameter n and ratio B of rock compressive strength to tensile strength) is obtained by numerical analysis method and polynomial regression method, and the correctness of rock vertical fracture model is verified through experiments. Linear regression coefficient between the PCF of prediction and experiments is 0.81, and significance level less than 0.05 shows that the model for predicting the PCF is correct and reliable. A comparative analysis between the PCF obtained from this model and Evans model reveals that the result of this prediction model is more reliable and accurate. The results of this work could provide some guidance for studying the rock cutting theory of conical pick and designing the cutting mechanism.
Research on borehole stability of shale based on seepage-stress-damage coupling model
Authors: Ran Xiaofeng , Wang Yuezhi , Jia Shanpo
Published: February 2019

In oil drilling, one of the most complicated problems is borehole stability of shale. Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evolution and the seepage-stress coupling is established. Meanwhile, the damage evolution equation which is based on equivalent plastic strain and the permeability evolution equation of shale are proposed in this paper. The physical model of borehole rock for a well in China western oilfield is set up to analyze the distribution of damage, permeability, stress, plastic strain and displacement. In the calculation process, the influence of rock damage to elastic modulus, cohesion and permeability is involved by writing a subroutine for ABAQUS. The results show that the rock damage evolution has a significant effect to the plastic strain and stress in plastic zone. Different drilling fluid density will produce different damage in its value, range and type. This study improves the theory of mechanical mechanism of borehole collapse and fracture, and provides a reference for the further research of seepage-stress-chemical-damage coupling of wall rock.
Effective properties of a new auxetic triangular lattice: an analytical approach
Authors: Cabras L. , Brun M.
Published: February 2019

In this article we propose a new auxetic periodic lattice with negative Poisson's ratio which tends to the limit ?=-1 under particular conditions. We have studied its generation and kinematic, and we give a full description of the mechanical properties of this innovative model. Calibrating the geometrical configuration of the lattice and the mechanical properties of the constituent material we are able to have a Poisson's ratio which is arbitrarily close to -1.
A micromechanical four-phase model to predict the compressive failure surface of cement concrete
Authors: Caporale A. , Luciano R.
Published: February 2019

In this work, a micromechanical model is used in order to predict the failure surface of cement concrete subject to multi-axial compression. In the adopted model, the concrete material is schematised as a composite with the following constituents: coarse aggregate (gravel), fine aggregate (sand) and cement paste. The cement paste contains some voids which grow during the loading process. In fact, the non-linear behavior of the concrete is attributed to the creation of cracks in the cement paste; the effect of the cracks is taken into account by introducing equivalent voids (inclusions with zero stiffness) in the cement paste. The three types of inclusions (namely gravel, sand and voids) have different scales, so that the overall behavior of the concrete is obtained by the composition of three different homogenizations; in the sense that the concrete is regarded as the homogenized material of the two-phase composite constituted of the gravel and the mortar; in turn, the mortar is the homogenized material of the two-phase composite constituted of the sand inclusions and a (porous) cement paste matrix; finally, the (porous) cement paste is the homogenized material of the two-phase composite constituted of voids and the pure paste. The pure paste represents the cement paste before the loading process, so that it does not contain voids or other defects due to the loading process. The abovementioned three homogenizations are realized with the predictive scheme of Mori-Tanaka in conjunction with the Eshelby method. The adopted model can be considered an attempt to find micromechanical tools able to capture peculiar aspects of the cement concrete in load cases of uni-axial and multi-axial compression. Attributing the non-linear behavior of concrete to the creation of equivalent voids in the cement paste provides correspondence with many phenomenological aspects of concrete behavior. Trying to improve this correspondence, the influence of the parameters of the evolution law of the equivalent voids in the cement paste is investigated, showing how the parameters affect the uni-axial stress-strain curve and the failure surfaces in bi-axial and tri-axial compression.
Fatigue crack growth behavior of Inconel 718 produced by selective laser melting
Authors: Konecná R. , Kunz L. , Nicoletto G. , Baca A.
Published: February 2019

Additive layer manufacturing has recently gained a lot of interest due to the feasibility of producing metallic components directly from a computer-aided design file of the part. Selective laser melting, one of the main additive layer manufacturing technologies, is currently capable of producing nearly ready-to-use parts made of metallic materials. Their microstructure, however, differs substantially from that produced by conventional manufacturing. That is why a detailed study and knowledge of the relation of specific microstructure, parameters of the selective laser melting process and mechanical properties is of utmost significance. This study reports on the investigation of the fatigue crack growth behavior in Inconel 718 superalloy produced by selective laser melting. The fatigue crack growth curve and the threshold values of the stress intensity factor for propagation of long cracks were experimentally determined on compact-tension specimens fabricated using a RENISHAW A250 system and the recommended processing parameters. The fatigue crack growth rates and the fatigue crack paths both in the threshold and in the Paris region were investigated. The crack propagation curves and the crack propagation threshold were compared with literature data describing the behavior of conventionally manufactured material. The mechanism of fatigue crack growth was discussed in terms of the specific microstructure produced by selective laser melting.
Prediction of three-dimensional crack propagation paths taking high cycle fatigue into account
Authors: Dhondt Guido
Published: February 2019

Engine components are usually subject to complex loading patterns such as mixed-mode Low Cycle Fatigue Loading due to maneuvering. In practice, this LCF Loading has to be superimposed by High Cyclic Fatigue Loading caused by vibrations. The changes brought along by HCF are twofold: first, the vibrational cycles which are superposed on the LCF mission increase the maximum loading of the mission and may alter the principal stress planes. Secondly, the HCF cycles themselves have to be evaluated on their own, assuring that no crack propagation occurs. Indeed, the vibrational frequency is usually so high that propagation leads to immediate failure. In the present paper it is explained how these two effects can be taken care of in a standard LCF crack propagation procedure. The method is illustrated by applying the Finite Element based crack propagation software CRACKTRACER3D on an engine blade.
Modelling of the fracture toughness anisotropy in fiber reinforced concrete
Authors: Tarasovs S. , Kruminš J. , Tamužs V.
Published: February 2019

Steel fiber reinforced concrete is potentially very promising material with unique properties, which currently is widely used in some applications, such as floors and concrete pavements. However, lack of robust and reliable models of fiber reinforced concrete fracture limits its application as structural material. In this work a numerical model is proposed for predicting the crack growth in fiber reinforced concrete. The mixing of the steel fibers with the concrete usually creates nonuniform fibers distribution with more fibers oriented in horizontal direction, than in vertical. Simple numerical models of fiber reinforced concrete require a priori knowledge of the crack growth direction in order to take into account bridging action of the fibers, which depends on the fibers orientation. In proposed model user defined elements are used to calculate the bridging force during the course of the analysis when the crack starts to grow. Cohesive elements were used to model the crack propagation in the concrete matrix. In cohesive zone model the cohesive elements are embedded between all solid elements to simulate the arbitrary crack path. The bridging effect of the fibers are modeled as nonlinear springs, where the stiffness of the springs is defined from experimentally measured pull-out force and the angle between the fiber and crack opening direction.
Influence of joint line remnant on crack paths under static and fatigue loadings in friction stir welded Al-Mg-Sc alloy
Authors: Besel Y. , Besel M. , Alfaro Mercado U. , Kakiuchi T. , Uematsu Y.
Published: February 2019

The influence of the joint line remnant (JLR) on tensile and fatigue fracture behaviour has been investigated in a friction stir welded Al-Mg-Sc alloy. JLR is one of the microstructural features formed in friction stir welds depending on welding conditions and alloy systems. It is attributed to initial oxide layer on butting surfaces to be welded. In this study, two different tool travel speeds were used. JLR was formed in both welds but its spatial distribution was different depending on the tool travel speeds. Under the tensile test, the weld with the higher heat input fractured partially along JLR, since strong microstructural inhomogeneity existed in the vicinity of JLR in this weld and JLR had weak bonding. Resultantly, the mechanical properties of this weld were deteriorated compared with the other weld. Fatigue crack initiation was not affected by the existence of JLR in all welds. But the crack propagated preferentially along JLR in the weld of the higher heat input, when it initiated on the retreating side. Consequently, such crack propagation behaviour along JLR could bring about shorter fatigue lives in larger components in which crack growth phase is dominant.
Finite element modeling and experimental studies on mixed mode-I/III fracture specimens
Authors: Bozkurt M. , Ayhan A. O. , Yaren M. F. , Siriç S.
Published: February 2019

In this study, finite element modeling and experimental studies on a mode-I/III specimen similar to the compact tension specimen are presented. By using bolts, the specimen is attached to two loading apparatus that allow different levels of mode-I/III loading by changing the loading holes. Specimens having two different thicknesses are analyzed and tested. Modeling, meshing and the solution of the problem involving the whole assembly, i.e., loading devices, bolts and the specimen, with contact mechanics are performed using ANSYSTM. Then, the mode-I/III specimen is analyzed separately using a submodeling approach, in which threedimensional enriched finite elements are used in FRAC3D solver to calculate the resulting stress intensity factors along the crack front. In all of the analyses, it is clearly shown that although the loading is in the mode-I and III directions, mode-II stress intensity factors coupled with mode-III are also generated due to rotational relative deformations of crack surfaces. The results show that the mode-II stress intensity factors change sign along the crack front and their magnitudes are close to the mode-III stress intensity factors. It is also seen that magnitudes of the mode-III stress intensity factors do not vary much along the crack front. Fracture experiments also performed and, using the stress intensity factors from the analyses and crack paths and surfaces are shown.
A critical analysis of the Mises stress criterion used in frequency domain fatigue life prediction
Authors: Nieslony Adam
Published: February 2019

Multiaxial fatigue failure criteria are formulated in time and frequency domain. The number of frequency domain criteria is rather small and the most popular one is the equivalent von Mises stress criterion. This criterion was elaborated by Preumont and Piefort on the basis of well-known von Mises stress concept, first proposed by Huber in 1907, and well accepted by the scientific community and engineers. It is important to know, that the criterion was developed to determine the yield stress and material effort under static load. Therefore the direct use of equivalent von Mises stress criterion for fatigue life prediction can lead to some incorrectness of theoretical and practical nature. In the present study four aspects were discussed: influence of the value of fatigue strength of tension and torsion, lack of parallelism of the SN curves, abnormal behaviour of the criterion under biaxial tensioncompression and influence of phase shift between particular stress state components. Information contained in this article will help to prevent improper use of this criterion and contributes to its better understanding.
Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment
Authors: Karuskevich M.V. , Ignatovich S.R. , Maslak T.P. , Menou A. , Maruschak P.. , Panin S.V. , Berto F.
Published: February 2019

The characteristic informative parameters for defect detection to be used in fatigue sensors have been established. Their development is interpreted in terms of scale levels of deformation and fracture. Damage accumulation of the sensor’s surface tends to exhibit the self-organization nature. It is accompanied by formation of "folded" strain-induced relief on the surface. The mechanisms of damage accumulation under cyclic deformation were analyzed with the use of the multiscale approach. KEYWORDS. Defects; Fatigue sensors; Damage; Aviation.
Development of a multiaxial fatigue damage parameter and life prediction methodology for non-proportional loading
Authors: Suman Sandip , Kallmeyer Alan , Smith John
Published: February 2019

Most of the prior studies on the prediction of fatigue lives have been limited to uniaxial loading cases, whereas real world loading scenarios are often multiaxial, and the prediction of fatigue life based upon uniaxial fatigue properties may lead to inaccurate results. A detailed exploration of multiaxial fatigue under constant amplitude loading scenarios for a range of metal alloys has been performed in this study, and a new methodology for the accurate prediction of fatigue damage is proposed. A wide variety of uniaxial, torsional, proportional and non-proportional load-paths has been used to simulate complex, real-world loading scenarios. Test data have been analyzed and a critical-plane based fatigue damage parameter has been developed. This fatigue damage parameter contains stress and strain terms, as well as a term consisting of the maximum value of the product of normal and shear stresses on the critical plane. The shear-dominant crack initiation phenomenon and the combined effect of shear and tensile stresses on micro-crack propagation have been modeled in this work. The proposed formulation eliminates many of the shortcomings of the earlier developed critical-plane fatigue damage models. It is mathematically simple with substantially fewer material dependent constants, and provides design engineers with a tool to predict the fatigue life of machine parts with minimal computational effort. This life prediction methodology is intended for a wide variety of LCF and HCF loadings on machine parts made of metals including advanced alloys. KEYWORDS. Multiaxial; Fatigue Damage Parameter; Non-proportional loading.
Parametric study of the deformation of transversely isotropic discs under diametral compression
Authors: Markides Christos F. , Kourkoulis Stavros K.
Published: February 2019

The displacement field in a circular disc made of a transversely isotropic material is explored in a parametric manner. The disc is assumed to be loaded by a parabolic distribution of compressive radial stresses along two finite arcs of its periphery in the absence of any tangential (frictional) stresses. Advantage is here taken of a recently introduced closed-form analytic solution for the displacement field developed in an orthotropic disc under diametral compression which was achieved adopting the complex potentials technique for rectilinear anisotropic materials as it was formulated in the pioneering work of S.G. Lekhnitskii. The analytic nature of this solution permits thorough, indepth exploration of the influence of some crucial parameters on the qualitative and quantitative characteristics of the deformation of transversely isotropic circular discs compressed between the jaws of the devise suggested by the International Society for Rock Mechanics for the standardized implementation of the Brazilian-disc test. The parameters considered include the anisotropy ratio (i.e., the ratio of the two elastic moduli characterizing the disc material), the angle between the loading axis and the planes of transverse isotropy and the length of the loaded arcs. Strongly non-linear relationships between these parameters and the components of the displacement field are revealed.
Effect of hot dip galvanization on the fatigue strength of steel bolted connections
Authors: Razavi S.M.J. , Peron M. , Torgersen J. , Berto F. , Mutignani F.
Published: February 2019

Hot dip galvanized steel bolted joints has been tested under fatigue loading to evaluate the effect of galvanizing coating on the fatigue strength of S355 structural steel. The experimental results showed that the decrease of the fatigue life of coated specimens in comparison with that of uncoated joints is very limited and the results are in good agreement with Eurocode detail category, without substantial reductions. The procedure for coating and preparation of the bolted joints is described in detail in this paper providing a useful tool for engineers involved in similar practical applications. The experimental results are compared with the previously published data on central hole notched galvanized and not treated specimens characterized by the same geometry.
Regularities of fracture pattern formation in alumina ceramics subjected to dynamic indentation
Authors: Tolmacheva (Lyapunova) E. , Davydova M. , Chudinov V. , Uvarov S. , Naimark O. , Zaytsev D. , Panfilov P.
Published: February 2019

In this paper the process of dynamic indentation, causing deformation and fracture of alumina ceramics, is investigated. The dynamic indentation experiments were carried out on the original setup based on the split Hopkinson bar technique. The regularities of structure evolution caused by indenter penetration are studied using the computer tomography data of the samples subjected to different loads. The investigation revealed the existence of comminuted area in the vicinity of the indenter and the formation of multiple cracks in the zone lying below. It was found that the higher is the applied indentation load, the denser is the crack pattern and larger are the cracks. A similarity of such a mechanical behavior between the examined material and dentin taken as a biocomposite is discussed.
Fatigue strength of corroded bolted connection
Authors: Zampieri Paolo , Curtarello Andrea , Pellegrino Carlo , Maiorana Emanuele
Published: February 2019

This note summarizes some recent investigation results on the behavior of corroded steel bolted joints under uniaxial fatigue loading. Fatigue test specimens, were made up using S355 structural steel plates joined together with preloaded M12 bolts of class 10.9 with a geometry that corresponds to the Δσ = 112 MPa EC3 detail category. The accelerated corrosion process was accomplished using an electrolyte consisting of an aqueous 5% NaCl solution whereby the specimens were treated. In particular, during the corrosion process specimens were repeatedly immersed for 2 minutes in the electrolyte and then removed keeping them 60 minutes long in free air at 35 °C. An atmospheric corrosion in marine-industrial environment is wellrepresented through corrosion test. Fatigue loading tests and surface morphology measurement of uncorroded and corroded specimens were performed and the results were compared.
The effect of porosity on fragmentation statistics of dynamically loaded ZrO2 ceramics
Authors: Davydova Marina , Uvarov Sergei , Naimark Oleg
Published: February 2019

The effect of load intensity and porous material structure on the fragmentation statistics of ZrO2(MgO)-based ceramics is studied. Cylindrical samples were fragmented under dynamic compression. Experimental data processing showed that the shape of stress-strain curves, the fragment size distribution and distribution of time intervals between the fractoluminiscense impulses depend on the sample porosity and load intensity. The X-ray Computed Tomography (CT) study of porous material structures allowed us to link the fragmentation statistics with pronounced porosity clustering (about 97% of the total pore volume) formed due to sintering.
The effect of loading rate on fracture energy of asphalt mixture at intermediate temperatures and under different loading modes
Authors: Aliha M.R.M. , Fakhri M. , Haghighat Kharrazi E. , Berto F.
Published: February 2019

At intermediate service temperatures hot mix asphalt (HMA) concretely are subjected to different loading rates due to movement of vehicles which can significantly affect their mechanical characteristics and final service load. Hence, in this paper the effect of loading rate on intermediate temperature fracture resistance of HMA materials is investigated experimentally in different modes of cracking. Different hot mix asphalt mixtures made of various compositions were subjected to asymmetric threepoint bend loading in the form of edge cracked semi-circular bend (SCB) specimens. The effect of aggregate type and air void were studied on the fracture energy values for three mode mixities (including pure mode I, mixed mode I/II and pure mode II) and at different temperatures of 5°C, 15°C and 25°C. Trends of change in fracture energy values revealed noticeable influence of loading rate on the low and intermediate temperature cracking behavior of tested asphalt mixtures with different air void contents and aggregate types subjected to mixed mode I/II loading. Also, a change observed in fracture resistance of asphalt mixtures at nearly zero (5°C) and intermediate temperatures (25°C) that was due to change in the behavior of bitumen from elastic to viscoelastic.
Diseño, implementación y análisis de un sistema de cálculo de fórmulas de nutrición parenteral en neonatos con apoyo del farmacéutico
Authors: Montenegro A. Willington
Published: February 2019

En este estudio se diseñó una hoja de cálculo para formulación de nutriciones parenterales neonatales, en base a los requerimientos sugeridos por la literatura internacional, y se comparó con los datos obtenidos de la formulación por el método manual y una calculadora online. Vale señalar que ni el método manual ni el de la calculadora online consideraban las características de cada marca comercial de los medicamentos usados en las nutriciones parenterales. Esta hoja de cálculo le permitió al farmacéutico acceder a datos relevantes tanto del paciente como de la formulación, lo que redundó en una correcta validación. Se realizó un estudio retrospectivo de 40 nutriciones parenterales neonatales formuladas en el Hospital Luis Gabriel Dávila entre los meses de enero y noviembre de 2014, incluyéndose únicamente los pacientes que recibieron siete o más días de nutrición parenteral.
KONSEP PENGEMBANGAN POTENSI MANUSIA
Authors: Somalia Endang
Published: February 2019

Konsep Pengembangan Potensi Manusia
TAKHRIJ HADIS MENGENAI: BATAL NIKAH TANPA IZIN WALI
Authors: Iman Fauzul
Published: February 2019

Takhrij Hadits Mengenai: Batal Nikah Tanpa Izin Wali
FUNGSI UNDANG-UNDANG PIDANA DALAM PENANGGULANGAN KORUPSI DI INDONESIA
Authors: Zaini Ahmad
Published: February 2019

Fungsi Undang-undang Pidana dalam Penanggulangan Korupsi di Indonesia
AKAR-AKAR TRADISI POLITIK SUNNI DI INDONESIA
Authors: Iqbal Muhammad
Published: February 2019

The Sunni doctrine plays an important role in the government. Its accommodative characteristic is something important that makes Sunni doctrine to be a device of the legitimation of the authority. The Muslim thinkers of classical Sunni such as al-Mawardi (975-1058 M), al-Ghazali (1058-1111 M) and lbn Taimiyah(1263-1329 M) have a great role in formulating the political doctrine of Sunni. In spite of the different nuance, all of these three classical Sunni thinkers develop the moderate political doctrine of Sunni. On the one hand, it is, of course, significant in situating the harmonious relation between the ruler and community. Therefore, the social and political stabilities will be well-maintained On the other hand, such a thought for a certain extent evokes stagnancy. Because there is no radical thought which is critical and opposite against the authority, the Sunni idea is frequently made use for the instantaneous interests of power. On evenlttally, the mutual interrelationship between the Sunni ulama and the ruler often happens. While ulama feel obtaining the patronage from the authority, the ruler gains religious justification from ulama.

In this context, Indonesia as the country with the majority of Sunni Muslims, as a matter of fact, applies the political doctrine of Sunni. It is because Sunni has had a long and establishei root since. the period of Islamic kingdoms in the archipelago, before Dutch-Colonial period. The archipelago ulama also formulated the harmonious relation between Islam and authority as formulated by the ulama of classical Sunni. The polotical tradition of Sunni was becoming stronger in line with the great influence of ulama in the archipelago kingdoms. This article tries to elaborate the relation between the Sunni ulama with the power of the kings in the archipelago and the patronage of the archipelago rulers toward them.
BUDAYA MUAKHI DAN PEMBANGUNAN DAERAH PERSPEKTIF FILSAFAT SOSIAL PADA KOMUNITAS ADAT PUBIAN DI LAMPUNG
Authors: Nurdin A. Fauzi
Published: February 2019

Muakhi as a social ethics and moral guidance is actualized in Pubian­Lampung society. Muakhi meant confratemily based on human equality is an ethic value in social system that functions to set up the moral consciousness, the sotial, cultural, economic and political adhesive, as well as the nation unitary agglutinant. Muakhi contains the basic values of the social integration that functions to solve the conflicts based on the moral consciousness, the social adhesive and the nation unity. Hence, muakhi may contribute to the moral dimension and social ethics of the regional development. Muakhi as an ethical value in society could be observed, developed and preseroed through various approaches for the development of science and technology.
KAJIAN REFLEKTIF TERHADAP PERPUSTAKAAN ISLAM DI BAGHDAD PADA ERA KLASIK KEBUDAYAAN ARAB-ISLAM KOSMOPOLITAN
Authors: Laugu Nurdin
Published: February 2019

This article is aimed at understanding the issues of Islamic libraries living around the, classical age of cosmopolitan Arab-Islamic culture and their roles in the development of Muslim society. The study is, therefore, focused on investigating the kinds of the Islamic libraries and then on classifying the contribution based on the construction of historical accounts. The investigation found at least five kinds of Islamic libraries, namely: mosque libraries, rulers and their family libraries, madrasah libraries, scholar/private libraries, and university/ academic libraries. Afterwards, the study concludes that the libraries had played important roles as centers for, education and learning, center for translation, centers for research, experimentation, and observation, centers for study and discussion, center for cultural development and preservation, and centers for knowledge/ scientific development and information.
TASAWUF KOTA
Authors: Chusnan Masyitoh
Published: February 2019

The development of Islamic mysticism faces the neiv era cifter it is merely found at villagers. Nowadays, Islamic mysticism goes on urban society and has irifluenced the society. Due to its transcendental esoteric side, Islamic mysticism fills the empty spaces of urban modem society. Along the day, people fail to persuade their hearts and souls into the deepest level of humanity. They have framed in the modern life style which merely measured by financial, matter, luxury, and so on. Actually, it is no one and only the measure of happiness. Nowadays, more people start aware that Islamic mysticism (religion) gives them the composure and true mean of life. This life is gift from God, therefore we have to recognize ma’rifat of God. In Islamic mysticim, they fin God as source of happiness.How the religiousty of Jamaah Pengajian Pengurus Cabang Muhammadiyah (PCM) Slipi Kota Bambu, West Jakarta, by the implementation of Islamic mysticism values becomes the main question of this research.This research shows that their religiosity is significant enough. It is based on high implementation of Islamic mysticism values at Jamaah Pengajian Pengurus Cabang Muhammadryah (PCM) Slipi Kota Bambu, Jakarta Barat. In the other case, we found low implementation of Islamic mysticism values, and needed to be improved. So, this religiousily of J amaah Pengajian Pengurus Cabang Muhammadiyah (PCM) Slipi Kota Bambu, West Jakarta, by the implementation of Islamic mysticism values, can be called urban Islamic mysticism (tasawuf kota) thas has the ways to apply subtantive values (not symbolic) of islamic mysticism.
Historia, teoría e investigación de la comunicación
Authors: Vidales Gonzáles Carlos
Published: February 2019

El artículo propone una revisión crítica de la historia, las teorías y la investigación de la comunicación en la actualidad para proponer desde ahí el paso de las reconstrucciones genealógicas del campo a las reconstrucciones fundamentadas en los objetos de conocimiento. Se analiza la emergencia de subcampos de conocimiento y del papel de la historia en la constitución del campo, la teoría y la investigación de la comunicación.
La teoría de la comunicación como matriz práctica para la resolución de conflictos
Authors: García Jiménez Leonarda
Published: February 2019

La metateoría de la comunicación ha sido utilizada tradicionalmente con fines epistemológicos. Este artículo plantea que también es una vía válida para hacer análisis de primer nivel y solucionar problemáticas comunicativas. El (Meta)modelo Pragmático de la Comunicación responde a este reto.
El papel de las emociones en la incitación al consumo. Análisis de un programa radiofónico de corte religioso
Authors: Gutiérrez Vidrio Silvia , Reyna Ruiz Margarita
Published: February 2019

Las emociones están presentes prácticamente en todas las actividades que desempeñamos. En el discurso religioso las emociones, afectos y sentimientos actúan como modos de afiliación a una comunidad, son maneras de comunicarse y de permanecer juntos. En este artículo presentamos cómo son movilizadas las emociones en un programa radiofónico de corte religioso con una característica peculiar: se ofrece al público una experiencia emocional a partir de la adquisición de un bien material.
Medios indígenas transnacionales: el fomento del cosmopolitismo desde abajo
Authors: Mercado Antonieta
Published: February 2019

Ser indígena o inmigrante han sido factores de exclusión para la ciudadanía en los Estados-nación contemporáneos. Cuando tenemos las dos condiciones en un grupo, estamos frente a un área ideal para estudiar la ciudadanía. Este ensayo ofrece una discusión en torno a las prácticas comunicativas de producción mediática de los indígenas oaxaqueños migrantes en Estados Unidos. También se consideran las acciones de preservación cultural en la participación en la esfera pública transnacional y el transnacionalismo como una precondición para un cosmopolitismo construido “desde abajo”.
Estado, mercado y medios de comunicación en el capitalismo neoliberal
Authors: Schleifer Pablo
Published: February 2019

Indagamos sobre el rol de los medios de comunicación en el modelo de acumulación del capitalismo neoliberal; la articulación entre el Estado, el mercado y los medios de comunicación es central para comprender la consigna de liberalizar, desregular y privatizar, así como las luchas simbólicas tendientes a legitimar el orden neoliberal.
Del patio de butacas a los nuevos espacios del cine. Sistemas online de distribución cinematográfica
Authors: Navarro Sierra Nuria
Published: February 2019

Se propone un estudio exploratorio que examina los nuevos sistemas de distribución cinematográfica online presentes en España (iptv, Smart tv y portales de contenido) y los cambios en las funciones de los sectores que intervienen en la comercialización. Se demostrará que se trata de un modelo que busca adaptarse a la demanda, cada vez más diversa, del espectador-usuario, pero que se encuentra todavía en vías de construcción.
UPAYA MENINGKATKAN KEMAMPUAN MEMBILANG MELALUI BERMAIN LOTTO ANGKA PADA ANAK KELOMPOK B TK DHARMA WANITA ROWO
Authors: Haryanti Tri
Published: February 2019

Ability to say children is the ability of children to count by calling one by one to determine the number or number of objects. Lotto is an educational game used in learning activities in children. The use of lottery media numbers is a form of recognizing numbers in early childhood. The rationale for the emergence of this problem is still the low ability to say children of the Rowo B TK Dharma Wanita Group. The purpose of this study is 1) to find out how to play lotto numbers that can improve the ability to say, children, 2) to understand the ability to remember the ability to count children through playing lotto numbers in children B TK Dharma Wanita Rowo Kandangan Group Semester II 2017/2018 Academic Year. The subjects of this study were students of the Group B TK Dharma Wanita Rowo donated by 25 children. The research was conducted in February 2018. Data collection methods used were observation, documentation, and interviews. Based on the results of the research and discussion, it can be concluded that through the lotto numbers game can improve the ability to count children in the TK B Group of Dharma Wanita Rowo Kandangan Temanggung Semester II 2017/2018 Academic Year. This is evidenced by the increase. The increase only reached 20%, then after the increase in Cycle I it increased to 52%, and Cycle II to 84%, has reached 80%. This success is marked by the child being able to lift by pointing objects, connecting / pairing symbols with objects and writing numbers.. Key words: Ability To Say, Lotto Numbers
INTENSITAS PEMBELAJARAN TEMATIK INTEGRATIF MELALUI PENDEKATAN SAINTIFIK DI SD KESTALAN SURAKARTA
Authors: Soewalni Soekirno Oktiana Handini,
Published: February 2019

This community service aims (1). Providing a scientific basis for elementary school teachers in implementing learning that is oriented towards active, effective and enjoyable learning. (2). Provide theoretical clarity and a better understanding of learning, learning objects and the situations and conditions of learning in elementary schools. (3). Contribute ideas to education managers in an effort to improve teacher professional competency and learner ability in elementary schools, especially at SD Kestalan Surakarta. Community service is carried out in an effort to deliver competence in terms of Integrative Thematic Learning Intensity through Scientific Approach at Kestalan Elementary School Surakarta as a partner school in the Surakarta Teacher Training and Education Faculty, followed by 26 teachers and Principals with a 6-hour implementation period, starting at 8:00 p.m. until 15:00 p.m. The outcome of this community service is that community service resulted in the delivery of material on the Scientific approach to integrative thematic learning in Primary Schools in an effort to optimize teacher understanding and implementation in primary schools in general and SD Kestalan Surakarta in particular. The expected results from the implementation of this service can provide an understanding of the Intensity of Integrative Thematic Learning through the Scientific Approach in Primary Schools. So Kestalan Surakarta Elementary School teachers have 90 percent of the ability to Integrative Thematic Learning through the Scientific Approach in Primary Schools. So that the teachers can transmit their understanding to fellow teachers in the Dabin and Gugus areas as well as primary school teacher meetings. And finally, the results of this service can be published in the service journal. Key words: Integrative Thematic Learning, Scientific Approach
Tefsir’de Çağdaş Akılcı Ekol
Authors: ARPA Enver
Published: February 2019

Bu makalede Kur’an’ın
tefsiri konusunda çağımızda yeniden canlandırılan akla dayalı tefsir ekolü
incelenmiştir. Bu ekolün daha iyi anlaşılabilmesi için makalenin ilk kısmında
bu yöntemin tarihteki kökenleri, en belirgin örneği sayılan Mutezilî tefsir
anlayışının tefsir yöntemi, Mutezililerin tefsirde bulunurken bağlı kaldığı
ilkeler vb. konular ele alınmıştır. Ardından çağımızda bu yöntemi yeniden canlandıran
ve bu ekolün ilk temsilcileri sayılan Cemaleddin Afganî, Muhammed Abduh ve
Reşit Rıza hakkında önemli görülen bazı bilgiler verilmiştir. Sonra Muhammed
Abduh ve Reşit Rıza’nın tefsir yöntemleri hakkında bilgi verilerek ikisinin
ortak ürünü olan el-Menar tefsirinin özellikleri anlatılmış ve genel bir
değerlendirmeye tabi tutulmuştur. Daha sonra bu düşüncenin İslam dünyasında
oluşturduğu etki üzerinde durulmuş ve bu etkiyi en çok dışa vuran bazı
şahsiyetler hakkında bilgi verilmiştir.

Makalede, Abduh’un temellerini attığı,
Reşit Rıza’nın fiili kuruculuğunu yaptığı bu çabanın, tefsir alanında yeni bir
çığır açtığı, son asırlarda adeta donuklaşan İslam fikir dünyasına bir canlılık
kazandırdığı tespitinde bulunulmuştur. Ancak 19. asrın pozitivist anlayışıyla
yüzleşme ihtiyacından doğan bu anlayışın akla tanıdığı sınırsız alan ve dini,
pozitif söylemlerle uyumlaştırma çabası sebebiyle zaman zaman Kur’an tefsirinde
kabul edilemez yorumlar ortaya koyduğu kanaati dile getirilmiştir.
Amasyalı Gazilerin Kıbrıs Barış Harekâtı Hakkındaki Görüşleri
Authors: ÖZCAN Selim
Published: February 2019

Kıbrıs Barış Harekâtı, adadaki Türklerin güvenliğini ve
barışını sağlamak için yapılmış olup, Amasya’dan da bu harekâta katılan ve
hayatta olan gazilerimiz bulunmaktadır. Bu çalışmada, araştırmaya katılan
gazilerin görüşleri referans alınarak tarih bilincinin ortaya çıkarılması
amaçlanmıştır. Araştırmada nitel araştırma yaklaşımının olgubilim
deseninden yararlanıldı. Bu yöntem kapsamında yapılandırılmış mülakatlar yapıldı.
Araştırmanın katılımcıları da Amasyalı Kıbrıs gazileridir. Yapılandırılmış görüşme formları veri toplama aracı
olarak kullanılmıştır. Formda gazilerin kişisel, barış harekatı
hakkındaki ve askerlik sonrası hayatı ile ilgili bilgileri yer almaktadır.
Veri toplama aracının güvenirliği için, bulgular yorumlanmadan  sunulmuş olup, verilerin sınıflandırılmasında
gazilerin düşünceleri yer almıştır. Verilerin toplanmasın da video kayıt
cihazından yararlanılmıştır. Araştırmanın bulguları incelendiğinde,
gaziler savaşın insanlık için yaşanmaması gereken bir olgu olduğunu, fakat
zorunluluklarda ise kaçınılmaz olduğunu ifade etmişlerdir. Ayrıca gazi
olmalarından da gururlu olduklarını belirtmişlerdir.

Günümüzün gençliği bu değerleri takdir ve şükranla
yadedip, gazilerin ifade ettiği gibi “şehitlerin nurlu gazilerin ise onurlu”
olduklarını unutmayıp saygı ile anmalıdırlar. Sonuçta, gazilerin
yaşadıkları bu tecrübelerin gelecek nesillere aktarılması sağlanıp, hem milli
tarihimiz açısından hem de tarihe ışık tutması bakımından tarih bilincinin
oluşmasına katkı sağlayacağı gibi gençlere referans kaynağı olacağı aşikârdır.
İbn Kesir’de Mucize Anlayışı
Authors: ÖZDEMİR Ahmet
Published: February 2019

İbn Kesir, Rivayet
tefsirinde önde gelen bir müfessirdir. Eserinde konuları ayrıntılı bir tahlile
tabi tutmuştur. Rivayet ağırlıklı bir yol izlemesine rağmen kendi düşüncelerini
de ortaya koymuştur. Mucize konusu da geçmişten günümüze birçok tartışmaya
neden olmuştur. Çünkü mucizeler, normal gidişatı tersine çeviren bir durumdur.
Bu konu, önceki peygamberlere verilen mucizeler ve son peygambere verilen
mucizeler olarak iki kategoride değerlendirilmiştir. Her peygamberin bir veya
birkaç mucizesi vardır. Bunlar, peygamberliği ispat anlamında yardımcı bir
etken olmuştur. Bu çalışmamızda, konuyu İbn Kesir bağlamında değerlendirmeye
tabi tutacağız. Bu arada diğer çalışmalardan da istifade edeceğiz.
Teknoloji Destekli İşbirliğine Dayalı Öğrenme Sürecine İlişkin Öğretmen Adaylarının Deneyimlerinin İncelenmesi
Authors: ÜNAL Erhan , ÖZDİNÇ Fatih
Published: February 2019

Bu
çalışmanın amacı, teknoloji destekli işbirliğine dayalı öğrenme yöntemine göre
tasarlanan öğretim teknolojileri ve materyal tasarımı dersinde öğretmen
adaylarının deneyimlerini incelemektir. Çalışmada karma araştırma yöntemlerinde
gömülü desen kullanılmıştır. Çalışmada teknoloji destekli işbirliğine dayalı
öğrenme sürecine ilişkin öğretmen adaylarının deneyimlerini belirlemek için öğretmen
adaylarının yaratıcılık ve akademik başarı puanları ile ortama ilişkin
görüşleri araştırılmıştır. Çalışmanın nicel boyutunda tek grup öntest-sontest
deneysel desen, nitel boyutunda ise yapılan deneysel işlemin etkililiğini
belirlemeye yönelik görüşme yapılmıştır. Veri toplama aracı olarak Whetton ve
Cameron (2002) tarafından geliştirilen ve Aksoy (2004) tarafından Türkçe’ye
çevrilen “Ne Kadar Yaratıcısınız?” ölçeği, öğretim materyali değerlendirme
formu ve tasarlanan öğrenme ortamına ilişkin hazırlanan yarı yapılandırılmış
görüşme formu kullanılmıştır. Çalışmaya bir devlet üniversitesinde 2017 yaz
dönemi pedagojik formasyon programı Görsel Sanatlar ve Müzik grubunda yer alan
49 öğretmen adayı katılmıştır. Çalışma sonucunda öğretmen adaylarının yaratıcılıkları
deneysel işlem sonucunda anlamlı bir şekilde değişmediği ve sontest başarı
puanları ile yaratıcılıkları arasında bir ilişki olmadığı bulunmuştur. Ayrıca
öğretmen adaylarının teknoloji destekli öğrenme ortamını işbirliğine dayalı
öğrenme ve web 2.0 teknolojilerinin kullanılması bakımından beğendikleri,
kişisel ve mesleki becerilerin gelişimine katkı sağlaması yönünden faydalı
buldukları, işbirliğine dayalı öğrenme sürecinde yaşanılan zorluklar ve
kullanılan teknolojilerden kaynaklı teknik sıkıntılar yaşadıkları bulunmuştur.
Bu çerçevede araştırmacılara ve uygulayıcıları birtakım öneriler sunulmuştur.
Öğretmen Adaylarının Yenilenebilir Enerji Kaynaklarına Yönelik Tutumlarının Belirlenmesi
Authors: GENÇ Murat
Published: February 2019

Bu
araştırma, öğretmen adaylarının öğrencilerinin yenilenebilir enerji
kaynaklarına yönelik tutumlarını belirlemek amacıyla yapılmıştır. Bu kapsamda Düzce
Üniversitesi Eğitim Fakültesi öğrencilerinden elde edilen veriler araştırmanın
ana materyalini oluşturmaktadır. Araştırmada veri toplama aracı olarak 5’li
likert özeliğe sahip  “Yenilenebilir
Enerji Kaynaklarına Yönelik Tutum Ölçeği” kullanılmıştır. Ölçek Fen Bilgisi
öğretmenliği ve Sınıf Öğretmenliği programında eğitim gören toplam 421 öğretmen
adayına uygulanmıştır. Ölçeğin “uygulama isteği”, “eğitimin önemi”, “ülke
çıkarları” ile “çevre bilinci ve yatırımlar” adlarında dört alt boyutu bulunmaktadır.
Elde edilen sonuçlara göre, gerek toplam puanlar açısından gerekse alt boyutlar
açısından yenilenebilir enerji kaynaklarına yönelik tutum puanlarında cinsiyet
açısından anlamlı bir fark bulunmamaktadır. Ancak “uygulama isteği” alt boyutu açısından
sınıf öğretmenliği öğrencilerinin fen bilgisi öğrencilerine göre anlamlı
düzeyde daha iyi tutuma sahip oldukları belirlenmiştir. Sınıf düzeylerine göre
ise tüm alt boyutlarda ve toplam tutum puanında anlamlı farklılıklar
bulunmuştur.
ANALISIS PENERIMAAN SISTEM UJIAN ONLINE BERBAYAR DENGAN MENGGUNAKAN METODE TECHNOLOGY ACCEPTANCE MODEL (TAM) DAN WEBQUAL
Authors: Setiawan Eko , Antoni Darius , Mirza Ahmad Haidar
Published: February 2019

Technology Acceptance Model (TAM) dan Webqual merupakan teori penerimaan  teknologi yang digunakan dalam penelitian ini. Terdapat lima konstruk yang  digunakan dan merupakan gabungan dari konstruk-konstruk asli yang terdapat dalam TAM dan Webqual. Kelima konstruk tersebut adalah kemudahan pengguna persepsi (perceived ease of use / PEOU), kegunaan persepsi (perceived  usefulness / PU), kualitas interaksi layanan  (Service Interaction Quality of Website/ Web-SQ), kualitas informasi (Information Quality of Website/ Web-IQ), dan minat perilaku menggunakan teknologi (behavioral intention to use / BIUS). Model gabungan ini selanjutnya digunakan untuk meneliti sistem ujian online berbayar dengan studi kasus qualitiva.id. Penelitian ini selanjutnya akan menjelaskan tentang penerimaan sistem ujian online berbayar  pada pelajar, mahasiswa dan masyarakat umum. Jenis penelitian yang digunakan dalam penelitian ini adalah penelitian eksplanatori dengan teknik analisis data menggunakan pendekatan PLS. Data diperoleh dari responden yang merupakan siswa LKP PalComTech Palembang dengan menyebarkan kuesioner tertutup. Terdapat 142 sampel penelitian yang dianalisis menggunakan metode PLS dengan software smartPLS. Berdasarkan hasil analisis data diperoleh hasil sebagai berikut: (1) Konstruk PEOU mempengaruhi konstruk AT; (2) Konstruk PU mempengaruhi konstruk AT; (3) Konstruk AT pengaruh terhadap konstruk BIUS; (4) Konstruk Web-SQ  tidak memiliki  pengaruh  terhadap  konstruk BIUS;  (5)  Konstruk Web-IQ mempengaruhi konstruk BIUS; dan (6) Konstruk BIUS tidak memiliki pengaruh terhadap konstruk BV;. Selain itu koefisien variabel laten PU terhadap AT memiliki nilai paling besar diantara nilai koefisien variabel laten pada model hubungan antar konstruk lainnya
LA CONSTRUCCIÓN VIRTUAL DEL CUERPO EN FACEBOOK CHAT: perfil, nicknames y avatares
Authors: Miranda Gaibor Christian Giovanny , Guamán Guadalima Nelly Gabriela , Ortiz Chamba Christian Nivardo
Published: February 2019

El artículo analiza la construcción virtual del cuerpo en Facebook Chat, haciendo uso de una etnografía de carácter virtual enfocado desde tres aristas: el perfil del usuario, los nicknames y los avatares. Para ello se investigó a usuarios-finales del sexo masculino y femenino, entre los 13 a 59 años de edad, de un nivel socio-económico medio alto y alto; concluyéndose que el artefacto tecnológico reemplaza el cuerpo con todos los rasgos de naturaleza biológica, donde el chateo permite la creación de mundos posibles a través de la (re)creación de significados y representaciones; espacio en el cual, el cuerpo real y práctico es suplantado por el avatar como generación de una nueva forma de encarnación, donde el cuerpo se fusiona con la máquina y esta se convierte en su extensión.

La red social Facebook personaliza el interés de la Modernidad por construir un ser que vive y deja las huellas de su existencia en la memoria de los visitantes –historia cronológica personal. Entre las razones por las que los usuarios de Facebook publican información sobre ellos mismos es la noción de fama/reconocimiento que está detrás de todo ello.