bluuebunny/crossref_metadata_2025 huggingface dataset:
Hybrid reconstruction method for multispectral bioluminescence tomography with log-sum regularization
Authors: Yu Jingjing , Tang Qin , Li Qiyue , Guo Hongbo , He Xiaowei
Published: May 2020

Bioluminescence tomography (BLT) has important applications in the in vivo visualization of a pathological process for preclinical studies. However, the reconstruction of BLT is severely ill-posed. To recover the bioluminescence source stably and efficiently, we use a log-sum regularization term in the objective function and utilize a hybrid optimization algorithm for solving the nonconvex regularized problems (HONOR). The hybrid optimization scheme of HONOR merges second-order information and first-order information to reconstruction by choosing either the quasi-Newton (QN) or gradient descent step at each iteration. The QN step uses the limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm (L-BFGS) to acquire second-order information. Simulations and in vivo experiments based on multispectral measurements demonstrated the remarkable performance of the proposed hybrid method in the sparse reconstruction of BLT.
Equation for modeling two-photon absorption in nonlinear waveguides
Authors: Linale N. , Bonetti J. , Sparapani A. , Sánchez A. D. , Grosz D. F.
Published: May 2020

We derive a novel propagation equation for optical waveguides that properly accounts for two-photon absorption (TPA). We start from a simple quantum theory of nonlinear fibers allowing for TPA to be included in a straightforward fashion. The derived equation is shown to be in excellent agreement with numerical results of conventional pump-and-probe schemes and, to the best of our knowledge, is the first single equation capable of correctly modeling TPA in the context of broadband signals.
Ideal shape of Fresnel lens for visible solar light concentration
Authors: Ma Xinglong , Jin Rihui , Liang Shen , Zheng Hongfei
Published: May 2020

This paper presents theoretical research based on the optimal transmittance condition of a prism to find an ideal shape for Fresnel lenses to concentrate visible solar light. First, the ideal-shape equation was derived out through a simplified method that uses one refraction on the midline of a prism to replace the two refractions, respectively, on its upper and lower interfaces. It has been assumed that the Fresnel lens is thin enough to consider each prism as a point, then all the simplified points form a curve. The differential equation of this curve was built up, which has been solved and expressed by a parametric formula. The parametric formula is defined as the ideal-shape equation of Fresnel lens. Second, the optimal combination of the total refracted angle θ and refractive index n has been analyzed to determine the maximal transmittance. The quantitative analysis has indicated that only one group of (θ, n) can achieve the optimal Fresnel lens’ transmittance. Finally, the maximal geometrical concentration ratio Cg of ideal Fresnel lens has been discussed. When material is defined, there is a unique θ that makes the geometric concentration maximal for visible solar light. Generally, materials with low refractive index can be used to design a Fresnel lens with larger Cg.
2019 Optical Materials Express Emerging Researcher Best Paper Prize: editorial
Authors: Boltasseva Alexandra , Hu Juejun
Published: May 2020

Optical Materials Express Editor-in-Chief, Alexandra Boltasseva, and Deputy Editor, Juejun Hu, announce the recipient of the 2019 prize for the best paper published by an emerging researcher in the Journal.
Leopard in kitten heels: The politics of Theresa May’s sartorial choices
Authors: Evans Rachel
Published: May 2020

This article discusses the clothing choices of Theresa May as a female Member of Parliament (MP) and as the second woman prime minister of Great Britain. A Conservative MP since 1997 with a conservative background growing up a Vicar’s daughter and grammar school education, Mrs May’s sartorial choices have evolved to conform with an understanding of female MP’s as proxy men and to reflect British national dress as defined by tradition. However, within this conservative persona, a discordant note is struck by her choice of shoes. Not always neutral, in this article, her choice of fabric is examined as a form of ‘everyday resistance’. Compromised as these choices are, her choice of leopard print kitten heels is suggested as a form of subaltern resistance.
A stranger in my own home: Prolonged travel and the (re)negotiation of Otavalo identity in Carlos Arcos Cabrera’s Memorias de Andrés Chiliquinga (‘Memories of Andrés Chiliquinga’) (2013)
Authors: O’Neil Megan
Published: May 2020

As one of Ecuador’s largest indigenous groups, Otavalos have become unique in their successful marketing of cultural products both nationally and internationally. The Otavalo diaspora has led to sizeable communities settling not only in larger cities within Ecuador, but around the world. Travel, especially to Europe and the United States, is now a rite of passage for young Otavalos, and these travelling merchants spread their heritage through the sale of products, from clothing and fabrics, to music and handicrafts. In turn, many spend a significant portion of the year (and their life) detached from the Otavalo community, moving through spaces in which they are labelled as ‘other’ to ones in which they are exclusive members of an ‘imagined community’. With a focus on Carlos Arcos Cabrera's 2013 novel Memorias de Andrés Chiliquinga (‘Memories of Andrés Chiliquinga’), this article explores the effects of prolonged travel on indigenous identity, and the ways in which the young Otavalos today are facing traditional and Eurocentric stereotypes in order to (re)negotiate what it means to be indigenous in a globalized world.
Uriel da Costa (1582?­‑1640), o itinerário intelectual de um marrano Português (Porto­‑Hamburgo­‑Amsterdão)
Authors: Landi Emanuele
Published: May 2020

Cada vez que se descobre um livro que se julgava perdido, dever-‑se-‑ia abrir automaticamente um novo capítulo da história do seu autor. Isto, inexplicavelmente, parece que não aconteceu com Uriel da Costa. A descoberta do Exame das tradiçoẽs phariseas (1990) tinha que reabrir o caso Costa contribuindo tanto para a revisão da sua biografia, quanto para o questionamento do seu corpus. A partir do século XVII, a memória de Uriel da Costa foi perspetivada e celebrada exclusivamente pela sua autobiografia, Exemplar humanae vitae, publicada quarenta anos depois da sua morte (1687). Mas já no início do século XX, e sobretudo depois da descoberta do Exame, começaram a aparecer fortes dúvidas sobre a autenticidade desta autobiografia tão apreciada. No entanto, Uriel da Costa foi um filósofo marrano português e, portanto, justifica-‑se a pergunta: quem eram os marranos? Porque foram tão importantes para a Coroa portuguesa e a Inquisição? O que levou Uriel da Costa e a sua família a abandonar Portugal? Para responder a estas perguntas, e satisfazendo o desideratum anunciado no início, iremos questionar a categoria historiográfica de ‘marrano’ dialogando com duas importantes interpretações, a de Israel Salvator Révah e a de António José Saraiva, esperando, assim, contribuir também para a História da Filosofia em Portugal.
Ferrando Francés, Antoni (2018), Fabra, Moll i Sanchis Guarner. La construcció d’una llengua moderna de cultura des de la diversitat, València, Publicacions de la Universitat de València
Authors: Garcia Sebastià Josep Vicent
Published: May 2020

Ressenya de: Ferrando Francés, Antoni (2018), Fabra, Moll i Sanchis Guarner. La construcció d’una llengua moderna de cultura des de la diversitat, València, Publicacions de la Universitat de València. ISBN: 978-84-9134-307-3, 408 pp.
Púrpura trombocitopénica crónica materna, efectos en el recién nacido
Authors: Bula Anichiarico Doris Alexandra , Payares Salamanca Laura , Barcenas Narvaez William
Published: May 2020

La evaluación y el manejo de la trombocitopenia neonatal es un desafío frecuente. Ocurre en menos del 1 % de los recién nacidos, pero es uno de los problemas hematológicos más comunes en el grupo de edad neonatal. La trombocitopenia autoinmune es una de las causas. Presentamos en este artículo un caso poco frecuente, en el cual hubo asociación embarazo y PTI crónica. Lo que indica que se debe evaluar, en forma integral, el binomio madre e hijoResumen del caso: recién nacido femenino, quien desarrolló trombocitopenia autoinmune luego del nacimiento. La madre tenía antecedente de púrpura trombocitopénica idiopática (PTI) crónica. Paciente recibió inmunoglobulina anti D sin respuesta; luego, con inmunoglobulina humana intravenosa durante cinco días consecutivos, la cifra de plaquetas aumentó a valores normales. No presentó secuelas neurológicas.Conclusiones: el personal médico debe tener presente que la causa de trombocitopenia neonatal es multifactorial.
Stress-Induced Takotsubo Cardiomyopathy After Transjugular Intrahepatic Portosystemic Shunt
Authors: Lamb Bernadette , Arbeiter Benjamin , Bhogal Neil , Anderson John , Jophlin Loretta
Published: May 2020

This report presents the first known documented case of Takotsubo cardiomyopathy, characterized by transient left ventricular systolic dysfunction after a transjugular intrahepatic portosystemic shunt procedure. A 59-year-old woman with decompensated cirrhosis underwent transjugular intrahepatic portosystemic shunt procedure with subsequent new-onset heart failure without previous diagnostic evidence of underlying cardiovascular disease, including cirrhotic cardiomyopathy. After 2 weeks of medical management with β-blockade and diuretics, the patient had recovery of a left ventricular ejection fraction.
História do Grupo Escolar Elizeu Campos de Mirandiba (Pernambuco)
Authors: Simões José Luís , Pedrosa Tulane Silva de Souza
Published: May 2020

O presente artigo é efeito da nossa dissertação de mestrado, que teve como um de seus objetivos historiar a gênese da educação pública na cidade de Mirandiba, localizada no sertão pernambucano. O Grupo Escolar Elizeu Campos foi inaugurado em 1934 e demolido em 1990, teve como aportes pedagógicos a tradicional cartilha e o método intuitivo, atrelados a rigidez proveniente do civismo e patriotismo, características dos grupos escolares em âmbito nacional. O Grupo Escolar Elizeu Campos institui-se por esforço do Coronel Elizeu Campos, personagem que também fundou a cidade juntamente com os quilombolas, índios e famílias andarilhas do pós-cangaço. Os entraves políticos que levaram a construção e demolição da instituição escolar foi a questão com a qual problematizamos este estudo, nos levando a ex-alunos, professores e literaturas que pudessem responder e reconstruir a história da educação em Mirandiba, e da primeira escola pública do local.
A genealogia de Michel Foucault e a história como diagnóstico do presente: elementos para a História da Educação
Authors: Resende Haroldo
Published: May 2020

Michel Foucault afirma que seus livros não são tratados de filosofia nem estudos históricos; mas que são, no máximo, fragmentos filosóficos em canteiros históricos, o que torna possível dizer que suas pesquisas se situam entre a reflexão filosófica e a prática historiográfica, sendo que o que está na perspectiva de sua história é o próprio presente. Trata-se de interrogar a irrupção dos acontecimentos que produziram nossa atualidade e investigar historicamente como e porque nos tornamos o que somos. Na abordagem da história pela genealogia, a análise foucaultiana recai sobre o saber em termos de estratégia e táticas de poder, o que implica situar o saber no embate das lutas e a verdade no jogo da disputa. O propósito aqui é remeter a discussão da história genealógica para o campo da educação, entendendo que ferramentas genealógicas podem fornecer elementos para a suspeição e o questionamento acerca não só da constituição da educação, mas também da própria noção de história, permitindo compreender a construção discursiva das memórias educacionais como efeitos de vontades de verdade.
Determining fair remuneration based on human capital theory
Authors: Hynek Olaf , Bik Marcin
Published: May 2020

The text of Determining fair remuneration based on human capital theory contains useful informations about measurability human capital that can be used for personal use in any case of employment in any country. the text contains the essence of fair remuneration, the formulas needed to create it, and 2 examples of their application.Â
Effect of Coating and Polishing of Cutting Tool on Machined Surface Quality in Dry Machining of Aluminium Alloy
Authors: Dev Atul , Tandon Smriti , Kumar Pankaj , Dutt Anup
Published: May 2020

Surface quality is one of the major concerns in any machining process. To achieve the higher surface finish, mostly concentrated on machining parameter optimisation. This study has been carried out to study the effect of coating and polishing of flute surface of the solid carbide (WC-Co) endmill cutters on machined surface quality obtained during dry machining of Aluminium alloy 24345WP. Experiments were conducted on Aluminum workpieces with Ø6 mm 2 flute end- mill cutter with and without coating/polishing and their effect on surface quality studied for linear as well as areal surface roughness parameters using white light interferometery. The study concludes that polished flute tool, despite their non-sharp cutting edges, gives considerably better surface finish due to its lowering of chip tool friction. This was also supported by the results obtained from scanning electron microscopy of the cutting tool edge as well as optical microscopy of the obtained machined surface.
Solid Fuel rich Propellant Development for use in a Ramjet to Propel an Artillery Shell
Authors: Yogeshkumar Velari , Rathi Nikunj , Ramakrishna P. A.
Published: May 2020

This study describes the development of a fuel-rich propellant to be used in a solid fuel ramjet to provide active propulsion to a 155 mm artillery shell. Fuel-rich propellants consisting of aluminum, ammonium perchlorate and hydroxyl terminated polybutadiene were developed and their ballistic properties were measured to choose the appropriate fuel for the ramjet application. The attempts made were to enhance the burn rates of the propellant to provide required burn rates at lowest possible pressures in primary combustor of the ramjet. The propellant selection was done with reference of working time period of the base bleed unit, to calculate the required burn rate and corresponding pressure in primary combustor. It was observed that the fuel rich propellant of composition 35% ammonium perchlorate with 1 % Iron oxide embedded on it, 30 % mechanically activated aluminum with 10% polytetrafluoroethylene, and 25 % HTPB was found suitable for the above application. This provided the higher burn rates among all developed propellants with high pressure index of 0.58. This makes it suitable for the ramjet requiring higher burn rates at lower possible primary chamber pressures. The Young’s modulus and tensile strength of this propellant was measured to be 1.73 MPa and 0.24 MPa, respectively.
Effect of Nanographite on Electrical Mechanical and Wear Characteristics of Graphite Epoxy Composites
Authors: Joshi Sanjeev K. , Kumar Ashavani , Zaidi M.G.H.
Published: May 2020

Effect of weight fraction (WF) of nanographite (NG, 400 nm) on electrical, mechanical and wear and characteristics of graphite epoxy composites (GECs) were investigated. For this purpose, a series of GECs was prepared through dispersion of various WF of NG into epoxy resin, followed by curing with polyamine. Dispersion of NG into epoxy matrix and onward formation of GECs and was revealed through UV, Fourier transformed spectra and atomic force microscopy (AFM). Photoelastic analysis in combination with AFM reveals the presence of uniformly dispersed domain of NG into stress free GECs with fringe order ranging 0.23 - 0.61 under compression of 8 - 20 kgf. GECs have rendered a rising trend in DC conductance ranging 98.32 - 0.54 μS/cm with electrical percolation threshold at 175 WF of NG. GECs have shown enhanced compressive, impact, tensile, strength, Rockwell hardness and wear resistance at 200 WF of NG. In general, GECs has shown a marginal modification in their compressive strength by 5.30 % over cured epoxy. However, their impact and tensile strengths were largely improved to 31.78% and 43.98% over cured epoxy. The present manuscript provides a novel method of modification in electrical, mechanical and wear behaviour epoxy through introducing NG as a novel alternative to traditionally used graphite as filler for development of GECs.
Pengaruh pemberian probiotik Lactobacillus helveticus Rosell-52 dan Lactobacillus rhamnosus Rosell-11 terhadap kadar limfosit lanjut usia
Authors: Wahyuningsih Retno , SS Darmono , Margawati Ani
Published: May 2020

Background: Infectious disease remains a health problem for the elderly. The elderly are susceptible to infection,because the body's ability to fight infection decreases immunity. The immune status can be improved through the effortsof immunization, and nutrition. However the elderly are not sufficient to meet the nutritional needs of food, so probioticcould support nutritional adequacy.Objective: Analyze the effect of probiotic Lactobacillus helveticus Rosell-52 and Lactobacillus rhamnosus Rosell-11 onlevels of lymphocytes in the elderly in Tresna Elderly Social Institution Puspakarma Mataram, West Nusa Tenggara.Methods: This was quasi-experimental study, randomized pre-post control group design. The population is elderly aged60-75 years, involving 45 subjects were divided randomly into two groups, namely the treatment groups givenprobiotics and the control group was given a placebo. Probiotics were given for 4 weeks, with the provision of onecapsule a day. Immunity status in this study was lymphocytes. Data examined included the intake of nutrients (protein,vitamin A, vitamin C, vitamin E, Fe, Zn), health status, quality of sleep, and levels of lymphocytes in the elderly. Datawere analyzed using bivariate with different test Independent sample t-test, Mann-Whitney U test, Spearman, Pearson,and Paired t-test.Results: Increasing number of lymphocytes were significantly in the treatment group (χ ± SD: 1.84 ± 1.85) and in thecontrol group (0.95 ± 5.0). There is no relationship between intake (protein, vitamin A, vitamin C, vitamin E, Fe, Zink),physical health status, and quality of sleep with levels of lymphocytes.Conclusion: Probiotics in 4 weeks is proven to increase the number of lymphocytes in the elderly.
Efek pemberian Chlorophyllin terhadap kadar nitric oxide dan malondialdehida tikus hiperkolesterolemia
Authors: Pontang Galeh S , Johan Andrew , Subagio Hertanto W
Published: May 2020

Background : Endothelial dysfunction is well-known as an early stage of atherosclerosis. Increased oxidative stress inhypercholesterolemia triggers endothelial dysfunction that is characterized by decreased biological availability ofnitric oxide (NO). Experimental studies showed that chlorophyllin had an effective antioxidant activity.Objectives : To determine the effect of chlorophyllin on nitric oxide (NO) and malondialdehyde (MDA) level ofhypercholesterolemic rats.Methods : Post test only randomized control groupusedtwenty four male Sprague Dawley rats were randomly dividedinto four groups: without treatment (technical control/K1), hypercholesterolemic (negative control/K2),hypercholesterolemic with chlorophyllin at dose of 1,8 mg/200 g/d (P1) and hypercholesterolemic with chlorophyllin atdose of 3,34 mg/200g/d (P2). Chlorophyllin was dissolved in water and was given via nasogastric tube for 21 days afterthe rats got hypercholesterolemia. Total cholesterol level of blood was measured by CHOD-PAP method, level of NOplasma was measured by Griess reaction and level of MDA plasma was measured by TBARS method. Hypothesis testwas analyzed by One Way Anova continued by Post hoc LSD test and Kruskall Wallis by significant level of 0,05.Results :NO plasma level was the lowest in group P2 (0.203+0.015 μM) and the highest in the group K2 (0,224±0,001μM), but no difference of NO plasma level among groups (p = 0.118). There were differences in MDA plasma levelamong the groups (p = 0.001). P1 and P2 groups had lower MDA plasma level than K2 (2.40+0.11 nmol/ml), indicatedby (1.94 +0.07 nmol/ml, p=0.0001) and (1,37 +0.13 nmol/ml, p=0.0001) respectively, but still higher than K1(0.94+0.05 nmol/ml, p=0.0001).Conclusion : The treatment of chlrophyllin does not have an effect of NO plasma level, but gives an effect of lowerMDA plasma level.
Tepung ubi kayu (manihot esculenta) dan tepung tempe kedelai mempengaruhi pengembangan volume dan mutu gizi protein roti tawar
Authors: Hamidah Nanik , M Legowo Anang , Anwar Syaiful
Published: May 2020

Backround: Bread was a carbohydrate source’s food, was made from wheat flour.  Cassava flour as substitution for wheat flour by modification process used physic method (boiling) to obtain resitant starch. Collaboration cassava flourwith tempeh flour to add protein velue. The research for attest substitution wheat flour with cassava flour and tempeh flour influence to volume characteristics and quality of protein nutrient for white breadMethods:The research methods used exsperiment with completely randomized design which consists of 5 treatment with 4 replications. Cassava flour was processed by modification used physical methods (boiling).Proportion for tempeh and cassava flour 0%, 6%, 12%, 18%, 24% combinated by tempeh flour proportion 3:1. Dependent variabel were size of volume white bread, quality of protein nutrient.  Data Analysis used Anova. Result:The result of those research were found that the best chararacteristic from white bread was treatment 6%. Size of volume 3,15ml/g was size volume bread from composite flour ingredient. Quality of nutrient for protein consist of protein content increased from 6,15% to 8,76%, protein digestibility increased from 11,7% to 13,83%was compared for treatment 0%. Conclusion: Substitution wheat flour with cassava flour and tempeh flour influence white bread organoteptic (texture, colour (crumb, crust), taste), size of quality of nutrient protein.
Ducrosia ismaelis Asch. essential oil: chemical composition profile and anticancer, antimicrobial and antioxidant potential assessment
Authors: Mothana Ramzi A. , Nasr Fahd A. , Khaled Jamal M. , Noman Omar M. , Abutaha Nael , Al-Rehaily Adnan J. , Almarfadi Omar M. , Kurkcuoglu Mine
Published: May 2020

The essential oil of Ducrosia ismaelis Asch. (Apiaceae) that grows wild in Saudi Arabia was investigated utilizing gas chromatography (GC), and gas chromatography-mass spectrometry. Fifty constituents were characterized, representing 96.1% of the total oil. The D. ismaelis essential oil (DIEO) was distinguished by a high composition of oxygenated monoterpenes (51.6%). Decanal (40.6%), α-pinene (15.1%) and dodecanal (13.7%) were the fundamental components. Additionally, DIEO was evaluated for its cytotoxic, antibacterial, antifungal and antioxidant activities. DIEO revealed a great cytotoxic effectiveness against the tested cancer cell lines with IC50 values between 66.2 and 137.3 μg/mL particularly against MCF-7 cancer cells. Furthermore, the induction of apoptosis against MCF-7 cells has been asserted using staining assay (annexin VFITC and/or propidium iodide (PI) dyes) and flow cytometry technique. The DIEO possessed a strong antimicrobial activity against Gram-positive bacterial and fungal strains with MIC-values between 0.07 and 0.31 mg/ml. The values of MBC or MFC were almost once higher than those of MIC’s. Moreover, the β-carotene-bleaching and DPPH free radical-scavenging tests showed that DIEO had a moderate activity (68%) as an antioxidant agent in decolouring of the β-carotene at 1.0 mg/mL and a moderate radical scavenging for DPPH (66 and 72%) at 0.50 and 1.0 mg/mL.
The effect of silica-calcite sedimentary rock contained in the chicken broiler diet on the overall quality of chicken muscles
Authors: Makarski Mateusz , Niemiec Tomasz , Łozicki Andrzej , Pietrzak Dorota , Adamczak Lech , Chmiel Marta , Florowski Tomasz , Koczoń Piotr
Published: May 2020

Opoka is a silica-calcite sedimentary rock chemically and structurally similar to diatomaceous earth (DE), composed mainly of silicon dioxide (SiO2), calcium carbonate (CaCO3), amorphous SiO. Opoka occurs predominantly in South Eastern Europe and Russia. Due to these specific properties investigation on the effect of opoka-enriched diet on chemical composition and overall quality of breast and leg muscles of broilers was initiated. Working samples showed a statistically significant increase in ash content or water content and a decrease in lipid content in the leg muscles of both male and female broilers (P<0.01). Furthermore, the addition of opoka to the diet increased WHC of leg muscles in females and hardness or chewiness of these muscles in both genders (P<0.05). The supplementation of broiler diet with opoka can be effectively applied to modify texture features of leg and breast muscle tissue which might, in turn, serve to regulate the nutritional and technological value of chicken meat.
Analysis of modern approaches for the prediction of electric energy consumption
Authors: Kalimoldayev Maksat , Drozdenko Aleksey , Koplyk Igor , Marinich T. , Abdildayeva Assel , Zhukabayeva Tamara
Published: May 2020

Abstarct

A review of modern methods of forming a mathematical model of power systems and the development of an intelligent information system for monitoring electricity consumption. The main disadvantages and advantages of the existing modeling approaches , as well as their applicability to the energy systems of Ukraine and Kazakhstan,are identified. The main factors that affect the dynamics of energy consumption are identified. A list of the main tasks that need to be implemented in order to develop algorithms for predicting electricity demand for various objects, industries and levels has been developed.
Green synthesis and characterization of hexaferrite strontium-perovskite strontium photocatalyst nanocomposites
Authors: Karahroudi Zahra Hajian , Hedayati Kambiz , Goodarzi Mojtaba
Published: May 2020

This study presents a preparation of SrFe12O19– SrTiO3 nanocomposite synthesis via the green auto-combustion method. At first, SrFe12O19 nanoparticles were synthesized as a core and then, SrTiO3 nanoparticles were prepared as a shell for it to manufacture SrFe12O19–SrTiO3 nanocomposite. A novel sol-gel auto-combustion green synthesis method has been used with lemon juice as a capping agent. The prepared SrFe12O19–SrTiO3 nanocomposites were characterized by using several techniques to characterize their structural, morphological and magnetic properties. The crystal structures of the nanocomposite were investigated via X-ray diffraction (XRD). The morphology of SrFe12O19– SrTiO3 nanocomposite was studied by using a scanning electron microscope (SEM). The elemental composition of the materials was analyzed by an energy-dispersive X-ray (EDX). Magnetic properties and hysteresis loop of nanopowder were characterized via vibrating sample magnetometer (VSM) in the room temperature. Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed the molecular bands of nanoparticles. Also, the photocatalytic behavior of nanocomposites has been checked by the degradation of azo dyes under irradiation of ultraviolet light.
Modified Zagreb connection indices of the T-sum graphs
Authors: Ali Usman , Javaid Muhammad , Kashif Agha
Published: May 2020

The quantitative structures activity relationships (QSAR) and quantitative structures property relationships (QSPR) between the chemical compounds are studied with the help of topological indices (TI’s) which are the fixed real numbers directly linked with the molecular graphs. Gutman and Trinajstic (1972) defined the first degree based TI to measure the total π-electrone energy of a molecular graph. Recently, Ali and Trinajstic (2018) restudied the connection based TI’s such as first Zagreb connection index, second Zagreb connection index and modified first Zagreb connection index to find entropy and accentric factor of the octane isomers. In this paper, we study the modified second Zagreb connection index and modified third Zagreb connection index on the T-sum (molecular) graphs obtained by the operations of subdivision and product on two graphs. At the end, as the applications of the obtained results for the modified Zagreb connection indices of the T-sum graphs of the particular classes of alkanes are also included. Mainly, a comparision among the Zagreb indices, Zagreb connection indices and modified Zagreb connection indices of the T-sum graphs of the particular classes of alkanes is performed with the help of numerical tables, 3D plots and line graphs using the statistical tools.
New generation of oxide-based nanoparticles for the applications in early cancer detection and diagnostics
Authors: Godlewski Michal M. , Kaszewski Jaroslaw , Kielbik Paula , Olszewski Jaroslaw , Lipinski Waldemar , Slonska-Zielonka Anna , Rosowska Julita , Witkowski Bartlomiej S. , Gralak Mikolaj A. , Gajewski Zdzislaw , Godlewski Marek
Published: May 2020

Hereby the possible applications of oxide nanoparticles in the cancer diagnostics and therapy are presented. Cancer diseases are nowadays one of the most common causes of death in the highly-developed countries. Discussed will be the current clinical cancer detection methods with their shortcomings. The role of nanomedicine in cancer medicine and the potential applications of nanoparticles debated in the literature will be critically evaluated. In the second part, the most common methods for the nanoparticle synthesis will be discussed. Finally, the system for cancer detection based on the enhanced permeation-retention of multimodal high-k oxide nanoparticles doped with lanthanides will be proposed for both for themagnetic resonance imaging (non-gadolinium contrast agents) and for fluorescence guided biopsy and surgery.
A review on the properties, reinforcing effects, and commercialization of
nanomaterials for cement-based materials
Authors: Zhao Zhifang , Qi Tianqi , Zhou Wei , Hui David , Xiao Cong , Qi Jieyi , Zheng Zhihong , Zhao Zhigang
Published: May 2020

The behavior of cement-based materials is manipulated by chemical and physical
processes at the nanolevel. Therefore, the application of nanomaterials in civil
engineering to develop nano-modified cement-based materials is a promising research.
In recent decades, a large number of researchers have tried to improve the properties
of cement-based materials by employing various nanomaterials and to characterize the
mechanism of nano-strengthening. In this study, the state of the art progress of
nano-modified cement-based materials is systematically reviewed and summarized.
First, this study reviews the basic properties and dispersion methods of
nanomaterials commonly used in cement-based materials, including carbon nanotubes,
carbon nanofibers, graphene, graphene oxide, nano-silica, nano-calcium carbonate,
nano-calcium silicate hydrate, etc. Then the research progress on nano-engineered
cementitious composites is reviewed from the view of accelerating cement hydration,
reinforcing mechanical properties, and improving durability. In addition, the market
and applications of nanomaterials for cement-based materials are briefly discussed,
and the cost is creatively summarized through market survey. Finally, this study also
summarizes the existing problems in current research and provides future perspectives
accordingly.
The Factors Determining Voter Turnouts in Presidential Elections in Nigeria: Multivariate Correlation Analysis of the 2019 Presidential Election
Authors: Adigun Olalekan Waheed
Published: May 2020

People’s active participation in elections is one of the key measures of electoral democracy. The people’s lack of interests or apathy in elections tends to undervalue the democratic process, engender mistrust in political institutions, and enthrone unaccountable leadership. This is why voter turnout is a crucial aspect of electoral studies. Even though Nigeria has successfully undergone two decades of uninterrupted democracy, she may not be too fast in imbibing the tenets of electoral democracy which presupposes active people’s participation in the electoral process. This is because there has been a conspicuous decline in voter turnouts in presidential elections since 2003. There are several factors responsible for this decline. This paper analysed three key variables – violence, socioeconomic factors, and candidate’s popularity - with the use of Multivariate Correlation Analysis (a statistical procedure that calculates correlation coefficients of two or more variables to determine the strengths of their relationships). The study, therefore, finds that of the three variables, candidate’s popularity as indicated by voters’ preferences for candidate’s/running mate’s tribe, political party, and trust in candidate’s abilities provide stronger evidence of the declining turnouts in Nigerian presidential elections.
Racial Disparities in Breast Cancer and Genomic Uncertainty: A QuantCrit Mini-Review
Authors: Gerido Lynette Hammond
Published: May 2020

African American women are 39-44% more likely to die from breast cancer than white women. This stable racial disparity in mortality rates has persisted since the 1980s and is unlikely to improve unless specific factors leading to disparities are discovered. Racial health disparities should be understood in the context of stable racialized social structures that determine differential access to information. The purpose of this study is to consider how recent quantitative studies using HINTS data might benefit from a critical race agenda to capture the nuances of African American women’s information behaviors, genetic testing awareness, and testing for BRCA1 and BRCA2 gene mutations.
Analytic determinants and inverses of Toeplitz and Hankel tridiagonal matrices with perturbed columns
Authors: Fu Yaru , Jiang Xiaoyu , Jiang Zhaolin , Jhang Seongtae
Published: May 2020

In this paper, our main attention is paid to calculate the determinants and inverses of two types Toeplitz and Hankel tridiagonal matrices with perturbed columns. Specifically, the determinants of the n × n Toeplitz tridiagonal matrices with perturbed columns (type I, II) can be expressed by using the famous Fibonacci numbers, the inverses of Toeplitz tridiagonal matrices with perturbed columns can also be expressed by using the well-known Lucas numbers and four entries in matrix 𝔸. And the determinants of the n×n Hankel tridiagonal matrices with perturbed columns (type I, II) are (−1]) {\left( { - 1} \right)^{{{n\left( {n - 1} \right)} \over 2}}} times of the determinant of the Toeplitz tridiagonal matrix with perturbed columns type I, the entries of the inverses of the Hankel tridiagonal matrices with perturbed columns (type I, II) are the same as that of the inverse of Toeplitz tridiagonal matrix with perturbed columns type I, except the position. In addition, we present some algorithms based on the main theoretical results. Comparison of our new algorithms and some recent works is given. The numerical result confirms our new theoretical results. And we show the superiority of our method by comparing the CPU time of some existing algorithms studied recently.
Coordination chemistry of Be2+ ions with chelating oxygen donor ligands: further insights using electrospray mass spectrometry
Authors: Raymond Onyekachi , Henderson William , Brothers Penelope J. , Plieger Paul G.
Published: May 2020

The electrospray ionisation mass spectrometric (ESI-MS) behaviour of various complexes of beryllium have been investigated in the work described in this paper. These beryllium complexes were analysed in situ on a small scale by preparing appropriate molar mixtures of the Be2+ ion with ligands in a range of solvent systems. In view of the toxicity of beryllium compounds, this combinatorial type screening, involving miniscule amounts of material in solution, proved to be a safe strategy to pursue the coordination chemistry of beryllium. A variety of beryllium complexes were generated with various ligands in solutions and subjected to detailed characterisation by ESI-MS. These ligands, containing functional groups or architecture of interest, varied from simple ligands such as the acetate ion to more common beryllium chelators including hydroxy keto ligands (maltol, tropolone), malonic acid, chromotropic acid and citric acid. Generally, there was excellent correlation between the species observed in the mass spectrum and those confirmed to exist in solution by other techniques. This lent strong credence to the ESI-MS methodology used as an efficient analytical technique for the easy screening of a diverse range of potential ligands for the divalent beryllium ion.
Crystallographic study of a heteroleptic chloroberyllium borohydride carbodicarbene complex
Authors: Walley Jacob E. , Dickie Diane A. , Gilliard Robert J.
Published: May 2020

Interest in beryllium, the lightest member of group 2 elements, has grown substantially within the synthetic community. Herein, we report the synthesis and crystal structure of a heteroleptic haloberyllium borohydride bis(1-isopropyl-3-methyl-benzimidazol-2-ylidene)methane ‘carbodicarbene’ (CDC) complex [(CDC)BeCl(BH4)]. Crystallographic data: Triclinic space group P1̅, a = 8.8695(14), b = 12.394(2), c = 16.844(3) Å, α = 102.395(4), β = 96.456(4), γ = 99.164(4)°, wR2 (all data) = 0.2706 for 6720 unique data and 357 refined parameters.
Mapping and Analysis of Hepatitis A Disease Distribution Based on Risk Factors in Bondowoso District
Authors: Hikmah Faiqatul , Nuraini Novita , Sari Estu Pratika
Published: May 2020

Hepatitis A is caused by the Hepatitis A virus (HAV). Bondowoso experienced an Extraordinary Occurrence HAV with 60 patients who were mostly teenagers. This study aimed to map and analyze the distribution of HAV based on risk factors in Bondowoso in 2016. This was descriptive research and application which was used to create digital map ArcView GIS 3.3. The result of this research was a map of HAV distribution and risk factor in Bondowoso. Mapping results showed that the risk factors cause HAV outbreak in Bondowoso were unhealthy living behaviors, Open Defecation, and rainfall intensity. The population density was not a risk factor due to outbreaks or extraordinary occurrences of hepatitis A occurred in areas of low population density. Suggestion for the Health Department to cooperate with an educational institution to increasing of clean and healthy behaviors Additionally, Hepatitis A immunization, and provide clean water.
Primary hyperparathyroidism as first manifestation in multiple endocrine neoplasia type 2A: an international multicenter study
Authors: Larsen Louise Vølund , Mirebeau-Prunier Delphine , Imai Tsuneo , Alvarez-Escola Cristina , Hasse-Lazar Kornelia , Censi Simona , Castroneves Luciana A , Sakurai Akihiro , Kihara Minoru , Horiuchi Kiyomi , Barbu Véronique Dorine , Borson-Chazot Francoise , Gimenez-Roqueplo Anne-Paule , Pigny Pascal , Pinson Stephane , Wohllk Nelson , Eng Charis , Aydogan Berna Imge , Saranath Dhananjaya , Dvorakova Sarka , Castinetti Frederic , Patocs Attila , Bergant Damijan , Links Thera P , Peczkowska Mariola , Hoff Ana O , Mian Caterina , Dwight Trisha , Jarzab Barbara , Neumann Hartmut P H , Robledo Mercedes , Uchino Shinya , Barlier Anne , Godballe Christian , Mathiesen Jes Sloth
Published: May 2020

Objective

Multiple endocrine neoplasia type 2A (MEN 2A) is a rare syndrome caused by RET germline mutations and has been associated with primary hyperparathyroidism (PHPT) in up to 30% of cases. Recommendations on RET screening in patients with apparently sporadic PHPT are unclear. We aimed to estimate the prevalence of cases presenting with PHPT as first manifestation among MEN 2A index cases and to characterize the former cases.

Design and methods

An international retrospective multicenter study of 1085 MEN 2A index cases. Experts from MEN 2 centers all over the world were invited to participate. A total of 19 centers in 17 different countries provided registry data of index cases followed from 1974 to 2017.

Results

Ten cases presented with PHPT as their first manifestation of MEN 2A, yielding a prevalence of 0.9% (95% CI: 0.4–1.6). 9/10 cases were diagnosed with medullary thyroid carcinoma (MTC) in relation to parathyroid surgery and 1/10 was diagnosed 15 years after parathyroid surgery. 7/9 cases with full TNM data were node-positive at MTC diagnosis.

Conclusions

Our data suggest that the prevalence of MEN 2A index cases that present with PHPT as their first manifestation is very low. The majority of index cases presenting with PHPT as first manifestation have synchronous MTC and are often node-positive. Thus, our observations suggest that not performing RET mutation analysis in patients with apparently sporadic PHPT would result in an extremely low false-negative rate, if no other MEN 2A component, specifically MTC, are found during work-up or resection of PHPT.
Post first-line dacarbazine or temozolomide in neuroendocrine carcinoma
Authors: Couronne Thomas , Girot Paul , Hadoux Julien , Lecomte Thierry , Durand Alice , Fine Caroline , Vandevoorde Katia , Lombard-Bohas Catherine , Walter Thomas
Published: May 2020

Objective

First-line chemotherapy in metastatic neuroendocrine carcinomas (NECs) is based on etoposide and platinum. However, there is no standard concerning second-line treatment. The objective of this study was to evaluate efficacy and tolerance of dacarbazine or temozolomide in metastatic digestive NEC as post first-line treatment.

Material and methods

This study included patients with a metastatic NEC of digestive or unknown primary site. All patients received platinum-etoposide as first-line chemotherapy. Primary endpoint was progression-free survival (PFS). Secondary endpoints were clinical/morphological responses, toxicity, and overall survival (OS).

Results

Twenty-seven patients were included: 17 received dacarbazine and 10 temozolomide as post-first line treatments. Median PFS was 3.0 (95%CI (2.2;3.7)) months. There was no significant difference between dacarbazine and temozolomide on PFS. Clinical and morphological responses were found in 12 and 9 patients, respectively. Median OS was 7.2 (95%CI (2.2;12.2)) months. The toxicity profile was that expected with such treatments.

Conclusion

LV5FU2-dacarbazine or temozolomide-capecitabine chemotherapies allow a temporary clinical response for almost half of patients and/or a morphological response for a third of patients.
The Relationships between Economic Growth, Energy Efficiency and CO2 Emissions: Results for the Euro Area
Authors: Klyvienė Violeta , Kėdaitienė Angelė
Published: May 2020

The article aims at ascertaining the relationship between indicators affecting the green economic growth of the Eurozone countries. Despite extensive research, scientists have not yet found a clear answer as to whether economic growth and climate change mitigation can be aligned. Another important aspect of the study was to investigate the possible effect of environmental policies on macroeconomic variables such as GDP, investment, employment, and trade. The authors of the article applied the PVAR econometric model to measure the impact of energy consumption, CO2 emissions, and some of the macroeconomic indicators on GDP growth in 19 countries of the Eurozone for years 2000–2016.Based on the results, we cannot yet state explicitly that economic growth in the Eurozone countries has been decoupled from climate change mitigation; however, green transition is on the right track.
ПЕРЕДУМОВИ І СТРАТЕГІЧНІ ПРІОРИТЕТИ СМАРТ-СПЕЦІАЛІЗАЦІЇ РЕГІОНУ
Authors: СТОРОНЯНСЬКА Ірина , МЕЛЬНИК Мар'яна , ЛЕЩУХ Ірина
Published: May 2020

Сьогодні смарт-спеціалізація є ключовим компонентом співпраці в рамках Європейської політики добросусідства щодо можливості використання в Україні європейських структурних та інвестиційних фондів.Отже, метою статті є дослідження на прикладі Запорізької області передумов і стратегічних пріоритетів смарт-спеціалізації регіонів України. Для цього проаналізовано такі показники, в тому числі й по Запорізькій області:• іноземний досвід та вітчизняні реалії впровадження концепції смарт-спеціалізації;• структуру економіки області за обсягами випуску продукції та послуг;• структуру зайнятості найманих працівників;• концентрацію основних видів економічної діяльності;• економічний потенціал видів економічної діяльності (ВЕД) області за інтегральним показником концентрації та часткою їх експорту в загальному обсязі експорту регіону.На основі вивчення статистичної та аналітичної інформації щодо науково-дослідної та інноваційної діяльності в регіоні у розрізі видів та підвидів економічної діяльності, а також урахування розвинутості необхідної інфраструктури, потенціалу суміжних галузей, інвестиційної привабливості тощо визначено перелік видів діяльності, які можуть сформувати основу для смарт-спеціалізації Запорізької області.Встановлено, що детермінантою стратегічного планування регіонального розвитку має стати адекватність системного законодавчого врегулювання зазначеного механізму на засадах інноваційної спрямованості. Відтак, актуальними вбачаються: конкретизація пріоритетів державної регіональної політики загальнодержавного, галузевого та регіонального рівнів; встановлення чіткого переліку пріоритетних напрямів інноваційної діяльності на 2021––2030 рр. на загальнодержавному, галузевому та регіональному рівнях;стимулювання впровадження та поширення практики стратегічного планування розвитку міст, селищ і сіл на засадах смарт-спеціалізації.Зазначене сприятиме системності стратегічного планування розвитку регіонів України, а також зростанню інноваційної активності та інвестиційної привабливості територій та країни в цілому.
ІНВЕСТУВАННЯ ІКТ-ІННОВАЦІЙ В НАЦІОНАЛЬНІЙ ЕКОНОМІЦІ ЗА РАХУНОК КОШТІВ ЗАГАЛЬНООБОВ’ЯЗКОВОЇ НАКОПИЧУВАЛЬНОЇ ПЕНСІЙНОЇ СИСТЕМИ
Authors: ДУЛЬСЬКА Ірина
Published: May 2020

У статті досліджуються можливості інвестування компаній, що впроваджують ІКТ-інновації в національну економіку, за рахунок коштів загальнообов’язкової накопичувальної пенсійної системи, запуск якої давно планується в Україні. Однак даний законопроєкт, поданий на розгляд Верховної Ради України наприкінці 2019 р., містить підходи, які регулюють неефективне добровільне накопичувальне пенсійне забезпечення. Отже,наслідками його впровадження стануть мала дохідність вкладених пенсійних накопичень, незначне охоплення ними населення, слабке інвестування реального сектору та технологічних пріоритетів національної економіки за рахунок добровільних пенсійних накопичень. Проблему успішному формуванню ефективного фондового ринку як передумови впровадження загальнообов’язкової накопичувальної пенсійної системи створює дефіцит надійних прибуткових фондових інструментів, зумовлений переважанням в Україні інсайдерської корпоративної моделі (диктат внутрішнього інвестора), тоді як розвиткові фондового ринку сприяє аутсайдерська модель (багато зовнішніх інвесторів).Досліджено досвід інвестування пенсійних накопичень США, Естонії, Казахстану, Польщі та Румунії і на цій підставі розроблено пропозиції з удосконалення законопроєкту щодо включення до переліку можливих інвестиційних декларацій ризикованіших і дохідніших агресивних інвестиційних декларацій та щодо більшої свободи вибору членів системи. Запропоновано на базі Міністерства цифрової трансформації України створити Координаційну раду, яка співробітничатиме з Пенсійним казначейством у плані інвестування коштів загальнообов’язкової накопичувальної пенсійної системи у впровадження ІКТ-інновацій у всі сектори національної економіки. Ця рада зможе здійснювати експертизу, готувати проспекти емісії акцій (IPO, SPO) таких підприємств, здійснювати андеррайтинг їх розміщення серед авторизованих структур. Також необхідно якомога швидше створити при великих біржах фондові структури, які спеціалізуватимуться на лістингу, рейтингуванні цінних паперів та оцінці вартості цих та інших високотехнологічних компаній (як Nasdaq), сформувати в Україні спеціалізовані фонди прямих інвестицій, які орієнтуватимуться на купівлю перспективних малих і середніх компаній ІКТ-сектору.