bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Improved Optical Heterodyne Scheme for RoF Systems Based on Optical Carrier Suppression and Optical Injection Locking Techniques
Authors: Zhu Kongfan , Li Yujun 
Published: January 2019

Abstract
In this paper, we proposed an improved optical heterodyne scheme based on optical carrier suppression (OCS) and optical injection locking techniques (OIL) for prospective applications in radio-over-fiber (RoF) systems to generate high-quality millimeter waves. In our scheme, the 60-Ghz millimeter wave signal is generated by heterodyning the outputs of two vertical cavity surface emitting lasers (VCSELs) that are optically injection locked by the two modulation sidebands provided by a 30-GHz externally modulated master tunable laser with suppressed center wavelength. The combined OCS and OIL heterodyne method are not only able to eliminate the phase noise caused by the instability of laser frequencies, but also can further suppress the center wavelength, thus improving the heterodyne performance. We evaluate the transmission quality of the proposed RoF system from the center station to base stations through simulation, and results prove our proposed OCS-OIL-heterodyne scheme to have error-free propagation within a distance of 40 km, better than the OCS-heterodyne scheme.
Forecasting Volatility Returns of Oil Price Using Gene Expression Programming Approach
Authors: Amo Baffour Alexander , Feng Jingchun , Fan Liwei , Buanya Beryl Adormaa 
Published: January 2019

Abstract
This study employs four (4) Generalized Autoregressive Conditional Heteroscedasticity (GARCH) variants namely GARCH (1, 1), Glosten–Jagannathan–Runkle (GJR), Auto Regressive Integrated Moving Average (ARIMA)-GARCH and ARIMA-GJR as benchmark models to assess the performance of a proposed novel Gene Expression Programming (GEP) based univariate time series modeling approach used to conduct ex ante oil price volatility forecasts. The report illustrates that the GEP model is more superior to any of the traditional models on issues relating to both loss functions applied. The GEP model is of a greater volatility forecasting precision at different forecast horizons, therefore. There is also the existence of evidence that GJR and ARIMA-GJR differ in their loss functions, the performance is nevertheless better than GARCH (1, 1) and ARIMA-GARCH. This study conducted herein achieves importance in literature by broadening the application of gene algorithms in finance and forecasting. It also solves the problem of high error associated with the use of GARCH related models in oil price volatility forecasting.
Discontinuation of imatinib mesylate could improve renal impairment in chronic myeloid leukemia
Authors: Malkan Umit Y. , Haznedaroglu Ibrahim C. 
Published: January 2019

Abstract
We aim to report a CML case that had fluid retention and serum creatinine increase under long-term imatinib mesylate (IM) treatment. A 68-year-old woman was diagnosed with chronic myeloid leukemia, and IM was started in 2002 with a dose of 400 mg/day. She had achieved complete hematological, molecular and cytogenetic remission under IM treatment. In September 2015, her creatinine level was 1.7 mg/dl. In May 2016, she was admitted to our hospital with dyspnea. Hypervolemia secondary to fluid retention was detected in our patient. Her laboratory tests results showed hemoglobin 9.7 gr/dl, white blood cell 7.6x103/μl, platelet 157x103/μl, creatinine 3.2 mg/dl, blood urea nitrogen (BUN) 88 mg/dl. In her X-ray chest film, bilateral pleural effusion was detected. The effusion was detected as transuda. The other reasons of pleural effusion were excluded and the development of pleural effusion was considered secondary to IM. IM was also considered responsible for the acute rise of serum creatinine levels of our patient. Therefore for these two reasons IM was stopped. After the discontinuation of IM, her creatinine levels decreased to 1.6 mg/dl and her pleural effusions disappeared. IM treatment was considered as the reason of serum creatinine elevation since serum creatinine levels decreased after the discontinuation of IM. All of the side-effects disappeared after discontinuation of IM.
Crystalline orthorhombic Ln[CO3][OH] (Ln=La, Pr, Nd, Sm, Eu, Gd) compounds hydrothermally synthesised with CO2 from air as carbonate source
Authors: Hämmer Matthias , Höppe Henning A. 
Published: January 2019

Abstract
Crystalline orthorhombic rare earth carbonate hydroxides Ln[CO3][OH] (Ln=La, Pr, Nd, Sm, Eu, Gd) were synthesised as phase pure powders via a simple hydrothermal reaction. CO2 from air acted as natural carbonate source and cetyltrimethylammonium bromide was added as templating agent to an aqueous rare earth nitrate solution. Single-crystal X-ray structure determination was performed on La[CO3][OH] (Pnma, a=7.4106(5), b=5.0502(3), c=8.5901(6) Å, 563 independent reflections, 38 refined parameters, wR2=0.037), Pr[CO3][OH] (Pnma, a=7.2755(4), b=4.9918(3), c=8.5207(5) Å, 744 independent reflections, 38 refined parameters, wR2=0.04), Eu[CO3][OH] (Pnma, a=7.1040(4), b=4.8940(3), c=8.4577(5) Å, 1649 independent reflections, 38 refined parameters, wR2=0.05) and Gd[CO3][OH] (Pnma, a=7.069(7), b=4.874(5), c=8.464(9) Å, 431 independent reflections, 38 refined parameters, wR2=0.051). These findings are supported by powder XRD, infrared spectroscopy, UV/Vis spectroscopy and, for Pr[CO3][OH] and Eu[CO3][OH], by measurements of the non-linear optical properties. Thermal analysis could demonstrate the possible use of the Ln[CO3][OH] phases as precursors for rare earth carbonate dioxides Ln
2[CO3]O2 and rare earth oxides Ln
2O3. The decomposition products inherit the precursor’s morphology. The lattice parameters of Pr2[CO3]O2 were refined from high-temperature powder XRD data.
CsTb3STe4 und CsTb5S2Te6: Zwei pseudo-ternäre Caesium-Terbium-Chalkogenide mit geordneten S2−- und Te2−-Anionen
Authors: Lissner Falk , Meyer Stephan P. , Schleid Thomas 
Published: January 2019

Abstract
By the oxidation of terbium metal with sulfur and tellurium in the presence of cesium bromide as flux at 850°C for 10 days, the first quaternary cesium terbium chalcogenides with ordered S2− and Te2− anions could be obtained as main products. The new compounds CsTb3STe4 and CsTb5S2Te6 occur as black needles. While CsTb3STe4 crystallizes in the orthorhombic space group Pnma with a=1924.08(16), b=433.61(3) and c=1493.47(13) pm for Z=4, CsTb5S2Te6 adopts the monoclinic space group C2/m with a=2146.17(18), b=431.42(3), c=1049.68(9) pm and β=102.064(3)° for Z=2. Both crystal structures are characterized by parallel cationic and anionic strands (

{

[

STb

3

]

7
+

}

∞
1

${}_\infty ^1\{ {[{\rm{ST}}{{\rm{b}}_{\rm{3}}}]^{7 + }}\} $

and

{

[

CsTe

4

]

7
−

}

∞
1

${}_\infty ^1\{ {[{\rm{CsT}}{{\rm{e}}_4}]^{7 - }}\} $

for CsTb3STe4 as well as

{

[

S
2

Tb

5

]

11
+

}

∞
1

${}_\infty ^1\{ {[{{\rm{S}}_{\rm{2}}}{\rm{T}}{{\rm{b}}_{\rm{5}}}{\rm{]}}^{11 + }}\} $

and

{

[

CsTe

6

]

11
–

}

∞
1

${}_\infty ^1\{ {[{\rm{CsT}}{{\rm{e}}_6}]^{11-}}\} $

for CsTb5S2Te6), all running along [010]. The cationic chains result from vertex-connected [STb4]10+ tetrahedra (d(S2−–Tb3+)=271–277 pm), whereas face-sharing bicapped trigonal or square prisms [CsTe6+2]15− or [CsTe8+2]19−, respectively, form their anionic counterparts.
Residual Properties of XD TMT Bars after Exposure to Elevated Temperatures
Authors: Tariq Faraz , Bhargava Pradeep 
Published: January 2019

AbstractThis article describes an experimental investigation carried out to study the influence of elevated temperatures on the residual mechanical properties of extra ductile hot-rolled XD 500 TMT deformed bars. The experimental study involved heated residual tests carried out on Extra Ductile (XD) Thermo-Mechanically Treated bars (TMT) rebar specimens after being exposed to various temperatures, such as 200°C, 400°C, 600°C, 800°C, 900°C, and 1,000°C, and subsequently cooling down to ambient conditions. A detailed description of the test results, observations, and discussion on results obtained from the testing, including comparisons with the available information in the existing relevant literature with particular emphasis on the influence of high temperature on ductility of extra ductile hot-rolled XD 500 TMT deformed bars has been presented. The results suggest better thermal performance of XD TMT over ordinary TMT and conventional hot-rolled rebars in terms of the aspects of mechanical response after exposure to elevated temperatures. The outcomes of this study have direct implications on the procedures used for predicting the ultimate behavior of structural elements during and following exposure to elevated temperatures.
Petróleo y minería
Authors: Rodríguez Padilla Víctor 
Published: January 2019

En este artículo se analiza de manera empírica la política mexicana en materia de extracción de petróleo, gas natural y otros minerales para discernir su naturaleza y alcance. Se concluye que el aprovechamiento de estos recursos se inscribe en un esquema extractivista que beneficia primordialmente a las empresas del ramo y se aleja del neoextractivismo practicado por gobiernos progresistas en América Latina. Asimismo, se señala que el extractivismo petrolero se ha potenciado con la liberalización de 2013–2014. En este marco, la degradación ambiental, las tensiones sociales y el agotamiento prematuro del patrimonio geológico son considerados como males menores de un progreso irrenunciable.
Taking an empirical approach, this article analyzes policies in Mexico concerned with the extraction of petroleum, natural gas and other minerals to establish their nature and reach. It concludes that the exploitation of these resources falls into an extractivist framework that primarily benefits the businesses of this industry and has moved away from neoextractivism as carried out by progressive governments in Latin America. Therefore, this article demonstrates that petroleum extractivism has been strengthened with the liberalization of 2013–14. In this framework environmental degradation, social tensions and the premature depletion of geological assets are considered lesser evils of unavoidable progress.
José Juan Tablada’s Creative Art Writing
Authors: Silva Manuel Gutiérrez 
Published: January 2019

Amidst the violence of the Mexican Revolution, the poet José Juan Tablada published Mexico’s first modern artist’s book and art book: Hiroshigué: El pintor de la nieve, de la lluvia, de la luna y de la noche (1914). In design and content, Tablada’s art book was a cultural artifact unlike any other. By drawing on concepts from cultural and literary theory, and art history, I demonstrate how this art book addressed the nation’s cultural crisis and proposed a program for interpreting and reinventing it.
En medio de la violencia de la Revolución mexicana, el poeta José Juan Tablada publicó el primer libro de arte y libro de artista moderno en México: Hiroshigué: El pintor de la nieve, de la lluvia, de la luna y de la noche (1914). Tanto en materia de diseño como de contenido, el libro de arte de Tablada fue un artefacto cultural sin parangón. Mediante el recurso a conceptos de la teoría del arte y la teoría literaria, además de la historia del arte, me propongo mostrar cómo abordó este libro la crisis cultural de la nación y cómo planteó un programa para interpretarla y reinventarla.
Penerapan Model Pembelajaran Pengelolaan Usaha Boga
Authors: Priyanti Priyanti , Khumaedi Muhammad , Wijaya M Burhan Rubay , Indani Indani 
Published: January 2019

Penelitian ini bertujuan untuk: Menguji keefektifan, kelayakan dan kepraktisan model yang dikembangkan. Penelitian ini menggunakan metode research and development (R&D). Model yang dikembangkan yaitu pembelajaran pengelolaan usaha boga. Studi pendahuluan dalam penelitian ini menunjukkan bahwa diperlukan tindak lanjut terhadap pembelajaran pengelolaan usaha boga untuk meningkatkan kompetensi wirausaha siswa. Model PPUB terbukti efektif dari adanya peningkatan hasil belajar siswa sebesar 0,371% kreteria “sedang”. Terbukti layak dari respon guru dengan rata-rata 3,25 kriteria “sangat layak”. Terbukti praktis dari respon siswa dengan rata-rata 3,4 kreteria “praktis”. Dengan demikian model PPUB dapat meningkatkan kompetensi wirausaha siswa jasa boga. Saran agar hasil penelitian model perlu disosialisasikan kepada guru SMK Jasa Boga agar dapat diterapkan dalam pembelajaran pengelolaan usaha boga.This study aimed to determine: Testing the effectiveness, feasibility and practicality of the catering business management learning model which was developed. This study used Research and Development (R&D). The model that developed was the learning of catering business management. The preliminary study in this study indicated that follow-up to the learning of catering business management is required to improve the students’ entrepreneurship competence. The development stage of catering business learning model included product design from learning media development and the strategy of learning model. The PPUB model proved that it was effective from the improvement of student learning outcomes by 0,371% with “medium” criteria. The PPUB model proved that it was feasible from the teacher responses with an average grade of 3.25 with “very feasible” criteria, and the model proved that it was practical from the student responses by obtaining an average of 3.4 with “practical” criteria. Thus, the model could improve students’ entrepreneurs catering services competence. The suggestion from result of this study is model of PPUB needs to be socialized to the teachers of SMK Jasa Boga in order it can be apply in management of catering business learning
Implementation of Quality Management System ISO 9001:2015 Integrated with Accreditation Standards in SMK 1 Sragi
Authors: Armawati Armawati , Syamwil Rodia , Florentinus Totok Sumaryanto 
Published: January 2019

Accreditation and ISO become a benchmark that is used as a school in an effort to ensure the quality of education. In applying of Quality Management System ISO 9001: 2015 can be integrated with accreditation standards. Purpose of this research: (1)the evaluation results of ISO 9001: 2015 implementation integrated with accreditation standards in SMK 1 Sragi in terms of Context, input, process, product; and (2) inhibiting and supporting factors for the implementation of ISO 9001: 2015 that are integrated with accreditation standards in SMK 1 Sragi. This research was carried out using the CIPP evaluation model from Stufflebeam. Data collection techniques: questionnaires, interviews, and review of archive documents. The results showed that : (1) The evaluation results of the ISO 9001: 2015 implementation integrated with accreditation standards in SMK 1 Sragi showed that: the context aspect is categorized quite well with an average of 3.18, the input aspect is categorized quite well with an average of 3.23, the process aspect is categorized quite well with an average of 3.19, the product aspect is categorized quite well with an average of 3.06. (2) The inhibiting factors for the implementation of ISO 9001: 2015 integrated accreditation standards in SMK 1 Sragi are stagnation of mindset for sustainable school progress, lack of literary awareness and lack of understanding of risk management, supporting factors for the implementation of ISO 9001: 2015 integrated accreditation standards in SMK 1 Sragi are top management commitment, role of personal, effective communication, and continous improvement.
Implementation of Dual Expertise Policies for Vocational High School Teachers in Demak Regency
Authors: Amron Muhammad , Syamwil Rodia , Sudana I Made 
Published: January 2019

Vocational education policies that are currently being implemented to produce skilled workers in their fields, one of them are, the proportion of Senior High School students: Vocational High School students are 30%: 70%, changes in the number of comparisons have an impact on the needs of the number of teachers, while temporary vocational teachers (productive teachers) in other expertise/specialization programs or other subjects, the number of teachers exceeds the amount that is required. The dual expertise program is a program to provide additional teaching authority for Vocational High School/Senior High School teachers who teach certain subjects to become productive subject teachers in Vocational High Schools in certain skill competencies that are different from previous skills competencies and relevant to their educational background. The objective of this study is to review and describe the implementation of dual expertise policies for Vocational High School teachers and their impact on Demak Regency. The process of preparation, implementation, and results of activities is described so that they can be understood as aspects related to the issues regarding the policy. This research was qualitative research. To get the validity of the data, the researchers used several data validity checking techniques, they were: (1) Technique of checking credibility; (2) Technique of transferability; (3) dependency checking technique. The data analysis used in this study was qualitative descriptive analysis. The result of this study is the impact of implementing dual expertise activities has not been significant towards the fulfillment of the needs of productive teachers. It is known that the problem is the element of communication, namely the lack of delivery of information from policy actors to the teacher. For other elements such as disposition, resources, and bureaucratic structure, it has been implemented well.
Conservation - Minded Behavior of the Field Practice Participants on Automotive Engineering Education Program
Authors: Sudarman Sudarman , Suwahyo Suwahyo , Burhan M. , K A. Mustamil 
Published: January 2019

Conservation – Minded Behavior of Field Practice Participant On Automotive Engineering Education Program. This study was aimed at figuring out: 1) conservation – minded behavior, 2) knowledge conservation, 3) achievement motivation, and 4) the support of conservation knowledge and achievement motivation simultaneously or independently to the conservation – minded behaviour of the field practice participants on automotive engineering education program, Engineering Faculty. This study was conducted in Mechanical Engineering Department, Engineering Faculty, UNNES and industry in Semarang in the year of 2017. 33 students were involved as the samples of this study. The conservation – minded behavior data were gathered using observation sheet, conservation knowledge data by test and achievement motivation data were gathered using questionnaire. The data were then analysed using descriptive statistics, multi regression and communality. The descriptive analysis showed that: conservation-minded behaviour of the field practice participants was mostly high, the conservation knowledge was mostly low and achievement motivation was mostly high. The multi regression analysis showed that the knowledge conservation and achievement motivation contributed 35.4% to the conservation – minded behavior. The communality analysis showed that conservation knowledge of the field practice participants contributed 15% to the conservation – minded behavior, and achievement motivation distributed 17.8% to the conservation – minded behaviour. The suggestion from this study was that the automotive engineering education should make an effort to improve the conservation – minded knowledge.
Activation of the Bile Acid Pathway and No Observed Antimicrobial Peptide Sequences in the Skin of a Poison Frog
Authors: Civitello Megan L , Denton Robert , Zasloff Michael A , Malone John H 
Published: January 2019

Abstract
The skin secretions of many frogs have genetically-encoded, endogenous antimicrobial peptides (AMPs). Other species, especially aposematic poison frogs, secrete exogenously derived alkaloids that serve as potent defense molecules. The origins of these defense systems are not clear, but a novel bile-acid derived metabolite, tauromantellic acid, was recently discovered and shown to be endogenous in poison frogs (Mantella, Dendrobates, and Epipedobates). These observations raise questions about the evolutionary history of AMP genetic elements, the mechanism and function of tauromatellic acid production, and links between these systems. To understand the diversity and expression of AMPs among frogs, we assembled skin transcriptomes of 13 species across the anuran phylogeny. Our analyses revealed a diversity of AMPs and AMP expression levels across the phylogenetic history of frogs, but no observations of AMPs in Mantella. We examined genes expressed in the bile-acid metabolic pathway and found that CYP7A1 (Cytochrome P450), BAAT (bile acid-CoA: amino acid N-acyltransferase), and AMACR (alpha-methylacyl-CoA racemase) were highly expressed in the skin of M. betsileo and either lowly expressed or absent in other frog species. In particular, CYP7A1 catalyzes the first reaction in the cholesterol catabolic pathway and is the rate-limiting step in regulation of bile acid synthesis, suggesting unique activation of the bile acid pathway in Mantella skin. The activation of the bile acid pathway in the skin of Mantella and the lack of observed AMPs fuel new questions about the evolution of defense compounds and the ectopic expression of the bile-acid pathway.
Punching strength of concrete footings based on the compression zone failure mechanism
Authors: Truong Gia Toai , Choi Kyoung-Kyu 
Published: January 2019

A strength model based on the compression zone failure mechanism was developed to predict the punching shear strength of concrete footings without transverse reinforcement. The proposed model assumes that the punching shear at a critical section is primarily counteracted by the compression zone of intact concrete at the footing. According to the material failure criteria of concrete, part of the compression zone failed by concrete crushing and the remaining part failed by inclined tensile cracking. In addition, the shear capacity of the concrete in the compression zone was evaluated considering the compressive normal stress developed by the flexural action of the footing. The strength model can be used for squat concrete footings with a low shear span to depth ratio as well as slender footings. The proposed model was verified by applying it to existing test specimens. The predictions of the proposed model demonstrated very good agreement with the test results and the model was found to be a better predictor than current design codes, specifically ACI 318-14 and KCI 2012.
Exploration of Preservice Teachers’ STEM Teaching Intentions with respect to the Department and Grade
Authors: KARIŞAN Dilek , BAKIRCI Hasan 
Published: January 2019

STEM education included in undergraduate science and mathematics education
program in 2017. Inclusion of STEM education in teacher education programs
higlights the importance of the investigating the preservice teachers STEM
teaching intentions. In this scope, it
is important to determine STEM teaching intentions of preservice primary,
science and mathematics teachers. This
research aims to identify the preservice primary school, mathematics, elementary
science teachers’ STEM teaching intentions. In this study, relational screening
model was used. The study was conducted in fall semester of 2017-2018 academic
year. A total of 521 (354 woman, 167
man) preservice teachers from three different departments enrolled in
the study. The questionnaire, developed by Lin and William (2015) and adapted
to Turkish by Hacımeroğlu and Bulut (2016) was used to assess preservice teachers’
STEM teaching intentions. Data was analyzed by using PASW Statistics 18 and
LISREL 8.80 statistical packages for windows. It was found that preservice
teachers’ STEM teaching intentions vary according to their field of education.
This significant difference is in favour of preservice science teacher.
Findings reveal that preservice science and primary school teachers STEM
teaching intentions are better than preservice mathematics teachers. It is
suggested that more studies are needed to determine inservice and preservice teachers’
STEM teaching intentions to identify what can be done to increase their teaching
intentions.