bluuebunny/crossref_metadata_2025 huggingface dataset:
Taking Lanthanides out of Isolation: Tuning the Optical Properties of Metal-Organic Frameworks
Authors: Anderson Samantha L. , Tiana Davide , Ireland Christopher , Capano Gloria , Fumanal Maria , Gładysiak Andrzej , Kampouri Stavroula , Rahmanudin Aiman , Guijarro Néstor , Sivula Kevin , Stylianou Kyriakos , Smit Berend
Published: February 2020

Metal organic frameworks (MOFs) are increasingly used in applications that rely on the optical and electronic properties of these materials. These applications require a fundamental understanding on how the structure of these materials, and in particular the electronic interactions of the metal node and organic linker, determines these properties.

Herein, we report a combined experimental and computational study on two families of lanthanide-based MOFs: Ln-SION-1 and Ln-SION-2. Both comprise the same metal and ligand but with differing structural topologies. In the Ln-SION-2 series the optical absorption is dominated by the ligand and using different lanthanides has no impact on the absorption spectrum. The Ln-SION-1 series shows a completely different behavior in which the ligand and the metal node do interact electronically. By changing the lanthanide in Ln-SION-1, we were able to tune the optical absorption from the UV region to absorption that includes a large part of the visible region. For the early lanthanides we observe intraligand (electronic) transitions in the UV region, while for the late lanthanides a new band appears in the visible. DFT calculations showed that the new band in the visible originates in the spatial orbital overlap between the ligand and metal node. Our quantum calculations indicated that Ln-SION-1 with late lanthanides might be (photo)conductive. Experimentally, we confirm that these materials are weakly conductive and that with an appropriate co-catalysts they can generate hydrogen from a water solution using visible light. Our experimental and theoretical analysis provides fundamental insights for the rational design of Ln-MOFs with the desired optical and electronic properties.
The Role of Ru Passivation and Doping on the Barrier and Seed Layer Properties of Ru-Modiﬁed TaN for Copper Interconnects
Authors: Natarajan Suresh , Nies Cara-Lena , Nolan Michael
Published: February 2020

Size reduction of the barrier and liner stack for copper interconnects is a major bottleneck in further down-scaling of transistor devices. The role of the barrier is to prevent diffusion of Cu atoms into the surrounding dielectric, while the liner (also referred to as a seed layer) ensures that a smooth Cu �film can be electroplated. Therefore, a combined barrier+liner material that restricts the diffusion of Cu into the dielectric and allows for copper electro-deposition is needed. In this paper, we have explored barrier+liner materials composed of 1 and 2 monolayers (MLs) of Ru-passivated epsilon-TaN and Ru doped epsilon-TaN and focus on their interactions with Cu through the adsorption of small Cu clusters with 1-4 atoms. Moreover, different doping patterns for Ru doping in TaN are investigated to understand how selective doping of the epsilon-TaN surface influences surface stability. We found that an increased concentration of Ru atoms in the outermost Ta layer improves the adhesion of Cu. The strongest binding of the Cu atoms was found on the 100% Ru doped surface followed by 1 ML Ru passivated surface. These two surfaces are recommended for the combined barrier+liner for Cu interconnects. The closely packed arrangements of Cu were found to exhibit weak Cu-slab and strong Cu-Cu interactions, whereas the sparse arrangements of Cu exhibit strong Cu-slab and weak Cu-Cu interactions. The Cu atoms seem to bind more favourably when they are buried in the doped or passivated surface layer due to the increase in their coordination number. This is facilitated by the surface distortion arising from the ionic radius mismatch between Ta and Ru. We also show that the strong Cu-Cu interaction alone cannot predict the association of Cu atoms as a few 2D Cu clusters showed stronger Cu-Cu interaction than the 3D clusters, highlighting the importance of Cu-surface interactions
Thermally-Induced Dehydrogenative Coupling of Organosilanes and H-Terminated Silicon Quantum Dots onto Germanane Surfaces
Authors: Yu Haoyang , Thiessen Alyxandra , Hossain Md Asjad , Kloberg Marc Julian , Rieger Bernhard , Veinot Jonathan G.C.
Published: February 2020

Covalently bonded organic monolayers play important roles in defining the solution processability, ambient stability, and electronic properties of two-dimensional (2D) materials such as Ge nanosheets (GeNSs); they also hold promise of providing avenues for the fabrication of future generation electronic and optical devices. Functionalization of GeNS normally involves surface moieties linked through covalent Ge−C bonds. In the present contribution we extend the scope of surface linkages to include Si−Ge bonding and present the first demonstration of heteronuclear dehydrocoupling of organosilanes to hydride-terminated GeNSs obtained from the deintercalation and exfoliation of CaGe2. We further exploit this new surface reactivity and demonstrated the preparation of directly bonded silicon quantum dot-Ge nanosheet hybrids.
Facile dissociation of molecular nitrogen using lanthanide surfaces: towards ambient temperature ammonia synthesis
Authors: Chan Jay , Lambie Stephanie , Trodahl Joe , Lefebvre Denis , Le Ster Maxime , Shaib Ali , Ullstad Felicia , Brown Simon , Ruck Ben , Garden Anna , Natali Franck
Published: February 2020

A combined experimental and computational study is reported on a hitherto unrecognised single lanthanide catalyst for the breaking of molecular nitrogen and formation of ammonia at ambient temperature and low pressure.

We combine in situ electrical conductance and electron diffraction measurements to track the conversion from the lanthanide metals to the insulating lanthanide nitrides.

The efficiency of the conversion is then interpreted using DFT+U calculations, suggesting a molecular nitrogen dissociation pathway separate from that well-established for transition metals.

Finally, we show that exposure of the lanthanide surfaces to both molecular nitrogen and hydrogen results in the formation of ammonia.
Enantioselective Hydroamination of Alkenes with Sulfonamides Enabled by Proton-Coupled Electron Transfer
Authors: Roos Casey B. , Demaerel Joachim , Graff David E. , Knowles Robert
Published: February 2020

An enantioselective, radical-based method for the intramolecular hydroamination of alkenes with sulfonamides is reported. These reactions are proposed to proceed via N-centered radicals formed by proton-coupled electron transfer (PCET) activation of sulfonamide N–H bonds. Non-covalent interactions between the neutral sulfonamidyl radical and a chiral phosphoric acid generated in the PCET event are hypothesized to serve as the basis for asymmetric induction in a subsequent C–N bond forming step, achieving selectivities of up to 98:2 er. These results offer further support for the ability of non-covalent interactions to enforce stereoselectivity in reactions of transient and highly reactive open-shell intermediates.
Homology Models of the Papain-Like Protease PLpro from Coronavirus 2019-nCoV
Authors: Stoermer Martin
Published: February 2020

The December 2019 outbreak of pneumonia in Wuhan, Hubei Province of China was rapidly linked to a novel coronavirus 2019-nCoV. The rapid spread and severity of the virus has led the World Health Organization to declare it a Public Health Emergency of International Concern. We recently described the first homology models of the main 3CL protease from 2019-nCoV, and now present models of the other viral protease, the papain-like protease or PLpro. Whilst the overall viral genome is most closely associated with bat coronaviruses, no bat PLpro crystal structures are known. Wuhan 2019-nCoV PLpro is most closely related to a bat coronavirus PLpro (97% identity), then SARS (80 %) and MERS (29%) and the most promising models presented here are prepared from SARS crystal structure templates.
Effect of honey mouth-care on xerostomia among semiconscious and unconscious patients
Authors: Sasmita Das  , Sailabala Mohanty  , Sonam Debnath
Published: February 2020

A quasi-experimental study was conducted to find out the effect of honey mouth-care on xerostomia among semiconscious and unconscious patients in a selected hospital of Odisha. In this study, an experimental research approach and non-randomized control group design were adopted. 40 patients were selected by the non-probability purposive sampling technique and who met the inclusion criteria were selected for the study. A self-structured interview schedule and record analysis performa were used for collecting socio-demographic data. The Challacombe Scale was used to assess the level xerostomia among the selected patients. In unpaired 't' test, there was a significant difference between the level of xerostomia among the experimental group and control group as 't' value was -6.03 (p<0.0001), which represented that honey mouth-care was effective in reducing the level of xerostomia. In paired 't' test, there was a significant difference between the level of xerostomia in pre-test and post-test score among the experimental group as 't' value was -6.45 (p<0.0001) which represented that honey mouth-care was effective in reducing the level of xerostomia. The chi-square association between levels of xerostomia with selected demographic variables revealed that there was a significant association between the level of xerostomia with age and history of the previous hospitalization. No significant association found between the level of xerostomia with the socio-demographic data and the duration of semi-consciousness or unconsciousness and duration of xerostomia. The findings of the study revealed that honey-mouth-care was highly effective in reducing xerostomia among semiconscious and unconscious clients.
Dinamika Sosial Sikap Narcisstic Aksi Demonstrasi Mahasiswa Dalam Prospek Demokrasi Indonesia
Authors: Syahrul Jiwandono Ilham
Published: February 2020

Abstrak. Penelitian ini bertujuan untuk mengetahui fenomena narcisstic dalam aksi demonstrasi yang dilakukan oleh mahasiswa dalam prospek demokrasi di Indonesia serta faktor-faktor penyebabnya. Pendekatan penelitian menggunakan pendekatan kualitatif. Lokasi penelitian di Program Studi Pendidikan Guru Sekolah Dasar, Universitas Mataram. Sumber data dibagi menjadi dua, yakni primer dan sekunder. Sumber data primer yakni mahasiswa semester 5 yang ikut aksi demonstrasi dan sumber data sekunder yakni hasil observasi dan dokumentasi. Teknik pengumpulan data melalui wawancara, observasi dan dokumentasi. Teknik analisis data melalui reduksi data, penyajian data dan verifikasi. Hasil penelitian menunjukkan: 1) Iklim demokrasi di Indonesia berkembang dengan baik dengan turut sertanya mahasiswa dalam mengontrol legislatif dan eksekutif. 2) Terjadi pergeseran nuansi demonstrasi saat ini dibandingkan dengan beberapa waktu yang lalu. Saat ini mahasiswa cenderung narsis dalam aksi demonstrasi dan melupakan substansi demonstrasi. 3) Faktor  yang menyebabkan adalah perkembangan teknologi yang semakin canggih dan membuat mahasiswa ingin menampilkan eksistensi dirinya melalui aksi demonstrasi lalu diunggah di media sosial. 4) Mahasiswa sebagai generasi Z menginginkan setiap aktivitasnya diketahui oleh banyak orang, termasuk melalui aksi demonstrasi yang bertujuan untuk mendapatkan perhatian dan pujian.
Industrial Democracy in Hungary
Authors: Szakats Alexander
Published: February 2020

This article describes the nature of industrial democracy in Hungary under the Labour Code 1992, and compares the role of Work Councils with that of trade unions.
Protection of Fundamental Rights by Constitutional Courts - A Comparative Perspective
Authors: Patrono Mario
Published: February 2020

"Man", said Benjamin Franklin, "is a tool-making animal". A major contribution of 20th century Western legal thought to tool-making was possibly the publication in 1914 of Reichgesetz und Landesgesetz nach der österreichen Verfassung1 by Hans Kelsen, a Czech lawyer, but Austrian by adoption. Kelsen is noted for his "pure theory of law". By conferring upon a special constitutional court the exclusive power to rule on the constitutionality of legislation and to refuse to enforce legislation that in its judgment violated the constitution, Kelsen found a way for the United States pattern of constitutional adjudication (as established in 1803 by Chief Justice John Marshall in Marbury v Madison) to work in countries which have (as in the United States) a written and "rigid" Basic Law, and even where the doctrine of precedent does not operate.This is a very short history of the development of that Kelsen "tool" and an evaluation of it.
Access to Essential Facilities under the Commerce Act in the Light of Experience in Australia, the European Union and the United States
Authors: Korah Valentine
Published: February 2020

Drawing on recent developments in Australian, United Kingdom and United States jurisprudence, Professor Korah casts doubt on the approach recently taken by New Zealand courts in one of the most controversial areas of competition law: the access to its facilities that a corporation in a dominant position must give to its would-be competitors.  She argues that before imposing such obligations courts ought to be more sophisticated in assessing the economic effects of such obligations and especially the need to preserve an incentive to make the considerable investment required to create such facilities.  Professor Korah was the 1999 Chapman Tripp Fellow. This article is an edited version of a paper presented at the offices of Chapman Tripp during the tenure of the Fellowship.
Resource Constraints and the Right of the Mental Disorders to Receive Appropriate Treatment
Authors: Wallach Sacha
Published: February 2020

This article explores the right of mentally disordered patients to appropriate treatment after the Mental Health (Compulsory Assessment and Treatment) Act 1992. It then examines the detrimental impact of resource constraints on this right, especially the undermining of the presumption in favour of community treatment. It concludes that resource constraints are not an appropriate justification for denial of the right to appropriate treatment.
Implied Term of Trust and Confidence: the Change in Approach of the Court of Appeal to the Requirement to Pay Redundancy Compensation
Authors: Nelson Ross
Published: February 2020

This article examines the changing views of the Court of Appeal to payment of redundancy compensation where a contract of employment is silent. The author contrasts the leading cases, particularly Brighouse and Aoraki, and examines their differing approaches to issues such as the intention and interpretation of the Employment Contracts Act 1991, the extent of the implied term of mutual trust and confidence, and the perceived need for certainty in the law. The article concludes that the outcome is at least partly a result of changing judicial politics, and that perceptions of the correctness or otherwise of the current law will largely depend on readers views of ideology and politics.
Looking Deeper at the Reform of New Zealand's Roading System: Driven by Economic Rationalism or an Example of Public Choice Theory in Action
Authors: Coull Matthew J
Published: February 2020

Successive New Zealand governments have investigated reforming New Zealand's road network since 1994. The draft Roads Bill 1998 creates a system of road provision operated according to commercial principles. Roads remain publicly owned, but operational management passes from Transit and 74 territorial authorities to newly incorporated "public road companies". The reforms are examined from "a law and economics" perspective, which finds that while efficiency gains may be generated, the proposed institutional design may prevent these gains from being realised to the proposed extent. The reform proposal is then analysed using public choice theory. This analysis finds that while some elements of the proposal are consistent with legislator and bureaucrat self interest, it contains too many politically sensitive variables to displace the Government's stated "efficiency gains" premise as the overriding motivation for reform.
PERFORMA KESEHATAN TIKUS Sprague dawley AKIBAT PEMBERIAN YOGHURT PREBIOTIK SEBAGAI ANTIDIARE
Authors: Saputri Lia , Tari Agustina Intan Niken , Hartati Sri
Published: February 2020

ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh pemberian yoghurt berpotensi prebiotik dengan penambahan ekstrak ubi jalar ungu sebagai antidiare dan mengetahui performa kesehatan tikus sebagai hewan coba. Tikus yang digunakan adalah tikus putih galur Sparague dawley umur 1,5 bulan. Parameter performa kesehatan tikus meliputi kenaikan berat badan, konsumsi pakan dan efisiensi pakan sedangkan parameter antidiare adalah kadar air feses.  Rancangan percobaan yang digunakan adalah rancangan acak lengkap dengan 4 faktor perlakuan yaitu Y- = tikus tanpa perlakuan yoghurt prebiotik dan (Enthero pathogenic Escherichia coli) EPEC, Y1 = tikus dengan perlakuan yoghurt prebiotik, Y2 = tikus dengan perlakuan yoghurt prebiotik dan EPEC, Y+ = tikus dengan perlakuan EPEC, setiap perlakuan diulang 5 kali. Data yang diperoleh dianalisis secara statistik dengan Anova. Apabila terdapat beda nyata antar perlakuan dilanjutkan dengan uji DMRT (Duncan Multiple Range Test) pada taraf signifikansi 5%.  Hasil penelitian ini menunjukkan bahwa pemberian yoghurt berpotensi prebiotik memberikan pengaruh yang nyata terhadap konsumsi pakan, berat badan, efisiensi pakan dan kadar air feses pada tikus percobaan.  Kenaikan berat badan dan efisiensi pakan menunjukkan hasil yang tinggi pada tikus yang tidak terinfeksi EPEC dan menunjukkan hasil yang rendah pada tikus yang terinfeksi EPEC. Kadar air feses dan konsumsi pakan menunjukkan hasil yang tinggi pada tikus yang terinfeksi EPEC dan menunjukkan hasil yang rendah pada tikus yang tidak terinfeksi EPEC. Kata kunci : yoghurt, yoghurt prebiotik dan antidiare.
KAJIAN KUAT TEKAN PAPERCRETE MUTU TINGGI DENGAN BAHAN TAMBAH LIMBAH KERAMIK
Authors: Safarizki Hendramawat Aski , Ristanto Iwan
Published: February 2020

Papercrete merupakan alternatif beton ringan dengan memanfaatkan limbah kertas yang ada di sekitar kita. Kelemahan dari papercrete adalah mutu kuat tekan yang rendah dikarenakan bahan penyusunnya yang berupa kertas. Target dari penelitian ini adalah merumuskan rancang campur (mix design) dari papercrete mutu tinggi yang  tahan  terhadap  beban  dengan  bahan  tambah  limbah keramik  yang  ramah  lingkungan.  Dengan  memanfaatkan  limbah  keramik  maka dapat  mengurangi  pencemaran  pada  lingkungan  sekaligus  meningkatkan  kuat tekan  papercrete. Metode  yang  dipakai  dalam  penelitian  ini  adalah  uji rancang  campur  pada  laboratorium  sehingga  didapatkan  komposisi campuran mutu tinggi antara papercrete dengan limbah keramik. Tahapan penelitian dimulai dengan pembuatan papercrete dengan tanpa bahan tambah limbah keramik. Kadar campuran kertas yang digunakan adalah 0%, 20%, 20% dan 30% dari volume pasir yang digunakan. Pada penelitian dibuat juga papercrete dengan bahan tambah limbah keramik. Kadar keramik pada campuran papercrete yang digunakan adalah 0%, 20%, 20% dan 30% dari jumlah pasir yang digunakan. Kesimpulan yang dapat diperoleh dari hasil pengujian adalah bahan tambah limbah keramik dapat meningkatkan kuat tekan papercrete. Nilai kuat tekan optimum papercrete tanpa bahan tambah limbah keramik dan papercrete dengan bahan tambah limbah keramik berada pada angka 26,0 MPa - 26,3 MPa.
Determination of modifying additives and impurities in Nb – Si-based composites using inductively coupled plasma atomic emission spectrometry (ICP AES)
Authors: Dvoretskov Roman M. , Karachevtsev Fedor N. , Zagvozdkina Tatyana N. , Svetlov Igor L.
Published: February 2020

The evolutionary development of structural heat-resistant superalloys has led to creation of high-temperature niobium-silicon based natural composite materials (CM) which are promising for manufacturing of aircraft gas turbine engine blades with an operating temperature of up to 1350°C. To impart the necessary properties (heat resistance, heat resistance, creep resistance, fracture toughness, manufacturability, etc.) CM are doped with modifiers, e.g., B, Ge, Sn, Zr. When using the technology of mechanical alloying for production of niobium-silicon based composites Fe and Ni can enter the material as technical impurities. The quality of materials is the first concern in the aerospace industry. Accurate determination the matrix, alloying and impurity elements in the CM composition is necessary for quality control of the semi-products and off-the-shelf CM. We improved the method of ICP AES with microwave sample preparation for determination of the chemical composition of niobium-silicon based composite materials. The analytical lines of B, Ge, Sn, Zr, Fe, and Ni free of significant spectral overlap are used. The range of the determinable contents (wt.%) is: Nb — 40 – 80; B, Ge, Zr — 1 – 5; Sn — 1 – 2.5; Fe — 0.01 – 10; Ni — 0.01 – 5. To evaluate the metrological characteristics of the method, model solutions similar in composition to the composites analyzed, prepared from certified solutions of the ions, were used as reference samples. State standard reference samples of ferroniobium and titanium alloys similar in composition to Nb – Si based CM were used to verify the accuracy of the technique in spiked tests. The repeatability and intermediate precision indices did not exceed 2 and 4 %rel., respectively, for all the elements studied.
Experimental study of the functional and mechanical properties of shape memory polymer composites for a reflector of the space antenna
Authors: Moskvichev Egor V. , Larichkin Alexey Yu.
Published: February 2020

Experimental study of the shape memory polymer composite is carried out as a part of scientific and technological work aimed at development of the new promising reflectors for space antenna. The studied material consists of three-layered carbon biaxial fabric St 12073 impregnated with a polyurethane-based Diaplex MP5510 polymer matrix. This material is intended for manufacturing a frame used in the construction of a precise composite reflector of space antenna. When opening the reflector to the transport position, the rim activated by heating recovers a previously specified shape thus increasing the rigidity of the reflector at the periphery and enhancing the accuracy of the reflecting surface. To study the functional and mechanical properties of the rim material in manufacturing and operating conditions, experimental tests were carried out on the samples with different schemes of reinforcement: [03], [0/±60] and [0/±45]. The main goal of the study is to determine the degree and rate of the shape recovery, reinforcement angles, deformation rate and exposure time in the strained state. The developed test program included several stages. At the first stages, tests were carried out for fixing and restoring the shape upon three-point bending of flat samples at a strain rate of 1, 5, and 10 mm/sec and exposure of the specimens in deformed state for 24, 48, and 96 h. According to the results the material with the reinforcement angles [03] was accepted as optimal for the rim design, as it has maximal shape recovery parameters. For the selected material at the final stage of the study, the elastic modulus and tensile strength were determined at operating temperatures –50, +20, and +60°C. The tests showed that the studied polymer composite material has the desired shape memory properties and is promising for the rim manufacturing provided the heat insulation during operation.
Study of the dynamic hardness of structural metal materials
Authors: Ilinskiy Aleksandr V. , Fedorov Alexey V. , Stepanova Ksenia A. , Kinzhagulov Igor U. , Krasnov Igor O.
Published: February 2020

The mechanical properties of structural metallic materials are the most important indicators of their quality. Different methods (i.e., the methods of Shore, Brinell, Rockwell, Leeb, Vickers, method of instrumental indentation, and others) are currently used for determination of the hardness — one of the most important mechanical characteristics of structural metal materials. Among them is the method of dynamic indentation first developed at the Institute of Applied Physics of the National Academy of Sciences of Belarus. With the goal of further developing of the method of dynamic indentation, we propose the procedures aimed at increasing the accuracy of assessing the hardness of structural metallic materials: parameters of the contact interaction of the indenter with the sample material (Brinell hardness values) were measured using a dynamic indentation (DI) device; the values of surface and volumetric dynamic hardness were calculated taking into account the characteristics obtained using a DI device; a comparative analysis of hardness estimates obtained by different approaches was carried out. As a result of the comparative analysis of the methods, as well as their experimental testing, it was shown that an increase in the accuracy of hardness assessment can be achieved by using the «energy» approach based on assessing the ratio of the total work to the volume of the recovered indentation upon dynamic indentation of structural metal materials. The use of the «energy» approach provided obtaining the sample standard deviation of the volumetric dynamic hardness values, which, in turn, was significantly lower than the sample standard deviation of the surface dynamic hardness values and data of the dynamic indentation device, which directly affects an increase in the accuracy of hardness estimation during dynamic indentation of structural metal materials. Proceeding from the «energy» approach, a new algorithm for processing the initial signal is proposed when the dynamic hardness is determined using a dynamic indentation device.
Komunikasi Device-to-Device pada Jaringan Seluler 5G menggunakan mmWave
Authors: Mulyadi Rasheed Abdurrahman , Usman Uke Kurniawan
Published: February 2020

This article discusses about device-to-device communication on 5G cellular networks using mmWave. Device-to-device communication will support 5G cellular technology, because it can be a solution to overcome the limitations of cellular coverage and service capacity. D2D can be used in a variety of applications. The main problem in D2D is that interference between signals in one cell will be very vulnerable to occur, so that effective resource management is needed. In addition, the use of D2D will also increase the complexity of a cellular system, in terms of resource management, interference, and also the routing required. Several studies have been carried out to create D2D communication that can be implemented effectively on 5G. One of them is research to perfect the load balancing scheme which is one of the functions obtained from D2D communication. Load balancing is the distribution of cellular traffic loads, using D2D the traffic load is channeled to communication between devices and reduces the burden on the main network.
Alois Richard Nykl: un arabista checo en Yucatán
Authors: KÙížová Markéta
Published: February 2020

El texto que se presenta a continuación es uno de los muchos preservados en el Museo Náprstek, en el legajo de Alois Richard Nykl (1885-1958), lingüista y filósofo de origen checo que ganó fama internacional como especialista en la lengua árabe y la religión musulmana, pero cuyo interés se dirigió también a otras regiones del mundo. Ya antes de su muerte, Nykl depositó gran parte de sus manuscritos y de su archivo de recortes y notas en el Museo Náprstek, importante museo de etnología no europea que se ubica en Praga. Este texto deriva de una investigación realizada en el marco del proyecto de la Universidad Carolina, República Checa, que lleva por título "PROGRES Q09: Historia. Llave al entendimiento del mundo globalizado".
Relatos a la espera. Muralismo urbano en los espacios públicos de San Cristóbal de Las Casas, Chiapas
Authors: Morales Vargas María de Lourdes
Published: February 2020

En este artículo se presentan algunas aproximaciones al fenómeno del muralismo urbano en San Cristóbal de Las Casas, Chiapas. Se efectuó un análisis de las características generales de la intervención urbana gráfico-pictórica y de los procesos creativos a través de entrevistas a los creadores y del acercamiento a sus obras, lo que hizo posible vislumbrar los proyectos, ideas y discursos que emanan de la práctica creativa en esta ciudad, para así aproximarse a algunos de los sentidos y significados que permiten concebir el muralismo urbano como práctica juvenil, artístico-social, colectiva y comunitaria.
La etnografía, el presente y la idea de historia
Authors: Escalona Victoria José Luis
Published: February 2020

El presente artículo es resultado de un análisis comparativo de etnografías publicadas en las últimas dos décadas del siglo XX que son resultado de investigaciones antropológicas realizadas en algunos pueblos de Michoacán y Chiapas, México. Lo que aquí se analiza es un conjunto de trabajos seleccionados de la amplia literatura producida en la época. El resultado muestra cómo los antropólogos producen diversas versiones de la idea de historia, y del presente, que derivan de perspectivas etnográficas contrastantes.
Análisis integral del desempeño de fotocatalizadores en la producción de hidrógeno
Authors: Torres-Guerra Leticia Miriam
Published: February 2020

Se presenta una revisión y análisis integral de resultados de NaTaO3 (perovskita) y la solución sólida Na2ZrxTi6-xO13 (x = 0,1) de túneles rectangulares, en forma de polvos y películas, con alto desempeño en la producción foto y electrocatalítica de H2. La eficiencia de estos procesos fue mejorada mediante: a) el estudio del efecto del método de síntesis en las propiedades y su desempeño en estos procesos, b) la construcción de microestructuras facetadas en películas delgadas, y c) la formación de heteroestructuras mediante el  depósito de cocatalizadores metálicos. Se obtuvieron películas delgadas del NaTaO3 con estructura tipo perovskita, altamente cristalinas por LCVD sobre sustratos de acero inoxidable para su aplicación en la reacción fotocatalítica de conversión de agua. Se logró  el depósito de películas delgadas de la fase ortorrómbica NaTaO3, mediante la técnica de LCVD, con microestructura altamente  facetada tipo piramidal; se observó, además, la presencia de nanoescalones. La eficiencia de las películas de LCVD-NaTaO3 fue 13 veces superior a la de los polvos. Se prepararon exitosamente nanobastones 1D, de las fases Na2ZrxTi6-xO13 (x = 0,1) con estructura de túneles rectangulares, mediante el método de solvocombustión.
The role of EFL learners’ autonomy, motivation and self-efficacy in using technology-based out-of-class language learning activities
Authors: Honarzad Radin , Rassaei Ehsan
Published: February 2020

This study aims to identify which technology-based out-of-class activities are more commonly used by Iranian EFL learners outside language classrooms. Furthermore, it explored the relationship between the use of technology-based out-of-class language learning activities (TBOCLLAs) by EFL learners and three individual learner characteristics such as motivation, autonomy and self-efficacy. The participants of the study consisted of 100 Iranian EFL learners who were asked to take part in the study by filling out four questionnaires regarding TBOCLLAs, motivation, autonomy, and self-efficacy. The results revealed that among different TBOCLLAs, receptive activities were relatively more frequent among learners than productive ones. Results also indicated that there was a strong positive correlation between technology-based out-of-class language learning activities and Iranian EFL learners’ motivation levels. Moreover, it was found that there was a strong correlation between TBOCLLAs and the EFL learners’ autonomy. In the same vein, the findings revealed a strong and statistically significant correlation between TBOCLLAs and the learners’ self-efficacy. Finally, the research findings suggested that learners’ motivation, autonomy, and self-efficacy were all significantly contributing to the participants’ use of technology-based out-of-class language learning activities. Among the above mentioned individual factors, motivation had the highest predictive value, and among self-efficacy and autonomy, the latter could better predict the use of TBOCLLAs by the learners.
The TGF-β3 Gene Polymorphisms and Carcass Components in Kampung x Meat Type Chicken Cross
Authors: I. Khaerunnisa  , Jakaria  , C. Sumantri
Published: February 2020

The TGF-β3 gene is a subtype of TGF-β superfamily that plays a crucial role in skeletal muscle growth. The objectives of this study were to identify the TGF-β3|BslI locus polymorphisms and to evaluate their effects on carcass components in Kampung and broiler chicken cross. A total of 129 chickens used in this study, consisting of: Kampung chickens (44), parent stock broilers Cobb strains (10), F1 Kampung x broilers (35), and F2 Kampung x broilers (40). The PCR-RFLP and direct sequencing techniques were used to obtain mutations in the intron 4 of TGF-β3 gene using the BslI restriction enzyme. The TGF-β3|BslI locus was polymorphic in all populations and three genotypes were found: CC, AA, and CA. No association was found between the three genotypes with the carcass components in F2 Kampung x broiler cross.
The Quality of Bali Beef from East Nusa Tenggara during Distribution Process from Slaughterhouse to Consumers
Authors: A. Martiana  , I. I. Arief  , H. Nuraini  , E. Taufik
Published: February 2020

The aims of this study were to analyze the physicochemical quality and microbiological condition of Bali beef during distribution process from slaughterhouse to consumers. The study used six heads of Bali cattle from East Nusa Tenggara which were transported by Camara Nusantara cattle ship from East Nusa Tenggara (Kupang) to Tanjung Priok then they were slaughtered at Jatimulya slaughterhouse. Samples were taken from three points distribution: 1) at slaughterhouse, 2) at market, 3) at consumers’ freezer (beef after 3 days at consumers’ freezer). Observation on pH, water holding capacity, cooking loss and tenderness was done to measure the physicochemical quality of Bali beef. In terms of microbiology quantitative analysis of total plate count Escherichia coli, Staphylococcus aureus, and Salmonella sp were done on Bali beef. All data were analyzed statistically using two-way analysis of variance (ANOVA). The results showed that Bali beef during distribution had normal pH value ranges between 5.43 - 5.57, water holding capacity ranges between 37.1%-38.9%, tenderness ranges between 6.02-8.35 and cooking loss range between 40.26% - 49.72%. Total plate count showed that the number of Escherichia coli, Staphylococcus aureus, and Salmonella sp. contaminated the Bali beef exceeds Indonesia national standard (3932:2008). However, the physicochemical quality of the beef was in the normal range. The characteristics of Bali beef at three points above mentioned are normal pH, stable water holding capacity, high level of tenderness, and low level of cooking loss.
Analisis Etnografi Virtual Tentang Proses Komunikasi Kesehatan Ibu Dan Anak Dalam Whatsapp Group “Tentang Anak”
Authors: Prasanti Ditha , Indriani Sri Seti
Published: February 2020

It was starting from the author's interest in mothers who are both urban women and put forward the concept of health literacy about care, healing, and health conditions of their children, if their children experience illness. The purpose of this study is to describe the process of health communication that occurs in whatsapp group "Tentang Anak"; the topic of conversation conducted in whatsapp group "Tentang Anak"; and communication barriers that occur during the health communication process. This study uses a qualitative approach with virtual ethnographic methods. The results of the study showed that the ongoing health communication process included the search by the mother for the health information about their children in whatsapp group "Tentang Anak". The topic of discussion is about information of healthy lifestyles for children, child development, child care, and child healing techniques when experiencing any pain. The communication barriers in the health communication process are personal obstacles, educational barriers, and time constraints.
Pelatihan Deteksi Tumbuh Kembang Anak Pada Kader Posyandu Ponowaren Gamping Sleman
Authors: Wijhati Ellyda Rizki , Suharni Suharni , Susilawati Budi
Published: February 2020

Masa balita merupakah periode emas pertumbuhan dan perkembangan yang sangat penting dan menentukan kualitas hidup anak mendatang. Deteksi pertumbuhan dan perkembangan pada masa balita sangatlah penting dilakukan untuk memantau apakah terjadi penyimpangan pada proses tumbuh kembang anak, Deteksi tumbuh kembang Balita (DTKB) yang dilakukanlebih awal  dapat menemukan penyimpangan lebih dini,sehingga intervensi yang diberikan akan jauh lebih efektif dan efisien.  Pelaksanaan Posyandu Kuncup Mekar di Ponowaren Sleman lebih banyak melakukan pemantauan pertumbuhan, sedangkan pemantauan perkembangan hanya dilakukan jika ada kunjungan dari Puskesmas, karena terbatasnya kader yang pernah mengikuti pelatihan DTKB. Tujuan Pelatihan DTKB ini adalah meningkatkan kemampuan kader untuk mampu melakukan DTKB dengan benar. Metode Pelatihan yang dilakukan meliputi uji pre dan post tes pelatihan, penyuluhan DTKB, Praktik DTKB meliputi pengukuran antropometri, pengisian buku KIA pada lembar Kartu Menuju Sehat (KMS), table z-score, Lingkar Kepala, interpretasi hasil penilaian DTKB dan penyuluhan pemanfaatan buku KIA sebagai media pendidikan kesehatan. Hasil pengabdian ada kenaikan tingkat pengetahuan tentang tumbuh kembang anak dibuktikan dengan kenaikan skor nilai pre- post test sebanyak 10-30 point, 14 kader telah mengikuti pelatihan DTKB dan telah mampu mempraktikkan DTKB dengan benar, buku KIA tidak hanya digunakan untuk mencatat hasil pengukuran pertumbuhan namun juga mencatat hasil deteksi perkembangan dan digunakan sebagai media pendidikan kesehatan oleh kader. Kata Kunci: Balita, Pertumbuhan, Perkembangan, Kader
CABLES Y ANTENAS. EL PROBLEMA DE LA CONECTIVIDAD Y EL DESPLIEGUE DE INFRAESTRUCTURA DE TELECOMUNICACIONES EN SAN CARLOS DE BARILOCHE
Authors: Malvicino Facundo Ezequiel
Published: February 2020

La difusión de las TIC y el despliegue de infraestructura de telecomunicaciones son factores coadyuvantes para el desarrollo y la diversificación productiva. Sin embargo, en el ámbito local se presentan conflictos particulares propios de las características socioeconómicas del territorio. El objetivo del trabajo es estudiar la problemática sobre el despliegue de infraestructura de telecomunicaciones en Bariloche. La regulación sobre el despliegue de antenas y cables entra en contradicción con los intereses económicos de los operadores de telecomunicaciones. La principal contribución del trabajo es comprender el conflicto entre los principales actores involucrados, los problemas institucionales y las prácticas de las grandes empresas de telecomunicaciones. La superposición de normativas da lugar a que las empresas impugnen judicialmente las ordenanzas, ejerciendo un virtual poder de veto sobre la política local. El resultado es el redireccionamiento de las inversiones hacia proyectos de mayor rentabilidad, menor calidad de conectividad y mayores costos administrativos para el Municipio.
LOS CONTENIDOS DEL HABITAR RURBANO: PRÁCTICAS, MOVILIDAD E IDENTIDADES EN LAS CIUDADES INTERMEDIAS DEL MAULE, CHILE
Authors: Micheletti Stefano , Saravia Cortés Felipe , Letelier Troncoso Francisco
Published: February 2020

En las ciudades intermedias de la región del Maule, Chile, un alto porcentaje de personas se identifica con una adscripción identitaria un poco urbana y un poco rural. A partir de este hecho, y utilizando los datos de una encuesta aplicada a 737 personas, se desarrolla un análisis descriptivo y correlacional, orientado a identificar cuáles son las características que definen al grupo de personas que declaran sentirse “rurbanos”. Se observa que si bien este grupo comparte el perfil socio-económico y laboral con el grupo que declara sentirse “urbano”, se diferencia de él en tanto realiza diversas prácticas vinculadas con lo rural, presenta una mayor conexión diaria con los centros poblados menores de la región y sus miembros han nacido en menor proporción en los centros urbanos mayores. Si bien no son concluyentes, consideramos estos hallazgos como pistas para futuros trabajos, esta vez de índole más cualitativa.
Cognitive Practices among Pre-Independence Movements in Ghana
Authors: Darko Isaac , Boateng Francis Danso
Published: February 2020

This is a qualitative document analysis paper that examined the historical documentations of Ghana's political system. Specifically we examined the development of social movements in days nearing political independence in 1957.
Pontia glauconome Klug, 1829 (Lepidoptera: Pieridae, Pierinae) in south-eastern Turkey: confirmation of breeding populations, with notes on the biology of early stages and on a species of the larval parasitoid Hyposoter Förster, 1869 (Hymenoptera: Ichneumonidae,
Campopleginae)
Authors: John Eddie , Başbay Onat , Seven Erdem , Kaymaz Nihat
Published: February 2020

We report on the apparently successful overwintering in Batman and Siirt Provinces, Turkey of Pontia glauconome, a pierid recorded in south-eastern Turkey for the first time in autumn 2016. Details of recent field observations of P. glauconome are provided and we discuss
and illustrate early stages found on Reseda aucheri, a possible new host-plant. The route by which P. glauconomemay have entered the country along the Tigris River from Syria is proposed. Larvae were found to have been attacked by a hymenopteran parasitoid species of the genus
Hyposoter; the 'mummified' larval skin and the adult parasitoid are illustrated.
On the subgeneric placement of Megalopta atra (Hymenoptera: Halictidae)
Authors: Engel Michael S.
Published: February 2020

A new subgenus is described for Megalopta atra Engel (Halictinae: Augochlorini) from Panama and Costa Rica, as Megaloptosyne subgen. n. Metasomal sternum IV of the male shares features with the related genus Xenochlora Engel et al ., distinguishing the group
from other Megalopta Smith along with various other modifications of sterna III and IV and the genitalia. A key is provided to the subgenera of Megalopta .
Insect pest species of Eucalyptus in Gibraltar
Authors: Malumphy C. , Guillem R. , Perez C. , Bensusan K.
Published: February 2020

Four invasive eucalypt-feeding insects, native to Australia, are recorded from Gibraltar for the first time: the gall-forming wasps Ophelimus maskelli (Ashmead) and Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae), the lerp-forming psyllid Glycaspis
brimblecombei Moore (Hemiptera: Aphalaridae), and the bronze bug Thaumastocoris peregrinus Carpintero & Dellapé (Hemiptera: Thaumastocoridae), whilst the status of two Eucalyptus longhorned borers, Phoracantha recurva Newman and P. semipunctata (Fabricius)
(Coleoptera: Cerambycidae), is summarised. The former five species have been found on the red-gum tree Eucalyptus camaldulensis Dehnh., growing in the urban environment in Gibraltar. The potential impact of these invasive species is discussed.
Sphegigaster hexomyzaeVikberg, 1983, (Hymenoptera: Chalcidoidea, Pteromalidae) new to the British Isles with notes on the parasitoids of gall-forming Agromyzidae (Diptera) in the genus Hexomyza
Authors: Godfray H. Charles J. , Warrington Barry P.
Published: February 2020

Sphegigaster hexomyzae Vikberg (Pteromalidae) is added to the British list from material reared from galls of Hexomyza simplicoides Hendel (Agromyzidae) on Salix cinerea in Yorkshire. Literature records of parasitoids from gall-forming Hexomyza are reviewed.
Integrin alpha 2 (Itga2), CD49b, is differentially expressed in pancreatic ductal adenocarcinoma.
Authors: Mamoor Shahan
Published: February 2020

Pancreatic ductal adenocarcinoma (PDAC) is the fourth leading cause of death from cancer in the United States (1, 2). Novel therapies are required to extend survival in PDAC and systems-level analysis of the tumors transcriptome as compared to the tissue of origin can reveal the basic transcriptional nature of tumors and how they differ from the tissue in which they reside and from which they originate (3). In this study, we compared the transcriptome of PDAC tumors isolated from patients with PDAC as compared to healthy, non-affected pancreatic tissue using two separate datasets (4, 5). We found that the cell adhesion molecule integrin alpha 2 (Itga2), also known as CD49b, was among the genes whose expression was most significantly different between PDAC and the benign pancreas. Itga2 expression was significantly higher in PDAC tumors compared to non-affected pancreatic tissue. Pancreatic ductal adenocarcinomas increase the expression of Itga2 during the transition from benign pancreatic tissue to transformed pancreatic tumor.
THE DEVELOPMENT OF JATILUWIH MICRO-HYDRO POWER PLANTS TO SUPPORT TOURISM DESTINATIONS
Authors: Kumara Satya
Published: February 2020

Jatiluwih is one of 18 villages located in Penebel District, Tabanan Regency. Jatiluwih has extensive agricultural land and is known for its beauty and natural terraces. The lack of public facilities such as lighting lamps located along the Subak Jatiluwih road is due to the electricity network not yet entering the Subat Jatiluwih area. With the existence of Korsorsium between Toyama Government and Bali Provincial Government, Tabanan Regency Government, and Udayana University CORE, power plants were built using renewable energy, namely water. The consortium conducts research related to the construction of a micro hydro power plant (PLTMH) in the Subak channel (irrigation) which is then utilized for public facilities namely street lighting lights around the Subak area. The PLTMH Jatiluwih was built on four sites or locations, namely Site 2 which consists of Site 2-1 PLTMH type Run Off River using Archimedes turbine and Site 2-3 Run-Off River PLTMH using open water turbines with a second-generation capacity of 1.5 kW , Site 7 MHP type Run Off River uses an open water turbine with a generating capacity of 500 Watts, and Site 5 uses penstock with a generating capacity of 7.5 kW.
ANALISIS DAN PENGUJIAN KEMANAN KELEMAHAN JARINGAN NIRKABEL DENGAN METODE EVIL TWIN ATTACK PADA KALI LINUX
Authors: Antoni
Published: February 2020

The rapid development of network technology, has made the use of network switching from using the cable to the use of wireless networks. Because wireless network technology utilizes high frequencies to transmit data, security vulnerabilities are also higher than wired network technologies. Various security measures can be done through network devices used by users or by operators who provide hotspot services. On the other hand, there are many methods used by hackers to steal user information over this wireless network. One commonly used method is Evil twin Attack or often called Rogue AP (acces point) which means fake access point. On any wireless networking device, there is a MAC (Medium Access Control) address that can be forged and used to redirect an Access Point artificial identity as the original Access Point. In this method, all users connected on the network will be sent a deauthetication frame that makes it disconnected from the network and immediately try to reconnect with the artificial Access Point that has been prepared by the hacker. After the user reconnects the network, indirectly the user has connected to the access point that has been prepared to do the attack, not the original access point.