bluuebunny/crossref_metadata_2025 huggingface dataset:
NT DINTE 26 - China: Importação dos Principais Subsetores do Agronegócio e o Market-Share Brasileiro
Authors: Bispo Scarlett Queen Almeida
Published: May 2021

Esta Nota Técnica visa investigar a posição do market share brasileiro ante a dos seus principais concorrentes nas importações da China dos subsetores mais relevantes do agronegócio, visto que produtos agropecuários passaram a ter expressão na relação comercial sino-brasileira. O estudo tem como base o Banco de Dados das Estatísticas do Comércio Internacional das Nações Unidas (United Nations International Trade Statistics Database – Comtrade), a Administração Geral das Alfândegas da República Popular da China (General Administration of Customs People’s Republic of China – GACC), o Departamento de Agricultura dos Estados Unidos (United States Department of Agriculture – USDA) e o Mapa (Agrostat – Estatísticas de Comércio Exterior do Agronegócio Brasileiro).

Trata-se de uma análise de dados com abordagem quantitativa, que descreve o market share dos principais países que compõem as importações advindas da China. Para isso, utilizaram-se como recorte dez subsetores do agronegócio selecionados a partir da coleta de dados secundários referentes às importações chinesas e às exportações brasileiras para a China, elencando-os com o apoio do critério de maior valor. Desse modo, foram selecionados os seguintes subsetores: soja em grãos, celulose, açúcar de cana ou beterraba, carne bovina, carne de frango, couros e peles de bovinos ou equídeos, óleo de soja, algodão e produtos têxteis de algodão, fumo não manufaturado e desperdícios de fumo e carne suína.
EXPLORING LOCATION DETERMINANTS OF ASIA’S UNIQUE BEVERAGE SHOPS BASED ON A HYBRID MADM MODEL
Authors: Lin Sheng-Hau , Hsu Chih-Chen , Zhong Taiyang , He Xiwei , Li Jia-Hsuan , Tzeng Gwo-Hshiung , Hsieh Jing-Chzi
Published: May 2021

Identifying relevant location determinants is a good starting point for shop operators, help to increase profitability and, thus, avoiding business failure. Traditional Analytic Hierarchy Process (AHP) or the Analytic Network Process (ANP) have shortages that require improvement. Herein, Decision-Making Trial and Evaluation Laboratory (DEMATEL), ANP based on DEMATEL (DANP), and modified Vlse Kriterijumska Optimizacija I Kompromisno Resenje (modified VIKOR) are used to construct a hybrid multiple-attribute decision making (MADM) model, encompassing three dimensions and thirteen criteria in exploring the location determinants of Asia’s unique Bubble Tea Shops (BTSs) and to evaluate three preselected alternatives in Nanjing, China. The empirical findings of the DEMATEL method reveal that traffic traits (D1) and site traits (D2) are critical to BTSs, and that once these are enhanced, shop traits (D3) are also improved. Criteria deemed as important, based on the DEMATEL and DANP methodology, are (in descending order): proximity to a street corner (C2), proximity to public transportation systems (C1), road width (C3), proximity to communities (C5), proximity to commercial areas (C6), types of shop (C9), and proximity to schools (C7). Different decision-making rankings among alternatives are indicated based upon the modified VIKOR method and corresponding strategies for improvement are presented.
The JCMT BISTRO Survey: The Distribution of Magnetic Field Strengths toward the OMC-1 Region
Authors: Hwang Jihye , Kim Jongsoo , Pattle Kate , Kwon Woojin , Sadavoy Sarah , Koch Patrick M. , Hull Charles L. H. , Johnstone Doug , Furuya Ray S. , Won Lee Chang , Arzoumanian Doris , Tahani Mehrnoosh , Eswaraiah Chakali , Liu Tie , Kirchschlager Florian , Kim Kee-Tae , Tamura Motohide , Kwon Jungmi , Lyo A-Ran , Soam Archana , Kang Ji-hyun , Bourke Tyler L. , Matsumura Masafumi , Mairs Steve , Kim Gwanjeong , Park Geumsook , Nakamura Fumitaka , Onaka Takashi , Tang Xindi , Liu Hong-Li , Ward-Thompson Derek , Li Di , Hoang Thiem , Hasegawa Tetsuo , Qiu Keping , Lai Shih-Ping , Bastien Pierre
Published: May 2021

Measurement of magnetic field strengths in a molecular cloud is essential for determining the criticality of magnetic support against gravitational collapse. In this paper, as part of the JCMT BISTRO survey, we suggest a new application of the Davis–Chandrasekhar–Fermi (DCF) method to estimate the distribution of magnetic field strengths in the OMC-1 region. We use observations of dust polarization emission at 450 and 850 μm, and C18O (3–2) spectral line data obtained with the JCMT. We estimate the volume density, the velocity dispersion, and the polarization angle dispersion in a box, 40″ × 40″ (5×5 pixels), which moves over the OMC-1 region. By substituting three quantities in each box with the DCF method, we get magnetic field strengths over the OMC-1 region. We note that there are very large uncertainties in the inferred field strengths, as discussed in detail in this paper. The field strengths vary from 0.8 to 26.4 mG, and their mean value is about 6 mG. Additionally, we obtain maps of the mass-to-flux ratio in units of a critical value and the Alfvén Mach number. The central parts of the BN–KL and South (S) clumps in the OMC-1 region are magnetically supercritical, so the magnetic field cannot support the clumps against gravitational collapse. However, the outer parts of the region are magnetically subcritical. The mean Alfvén Mach number is about 0.4 over the region, which implies that the magnetic pressure exceeds the turbulent pressure in the OMC-1 region.
Anisotropy of Magnetic Field and Velocity Fluctuations in the Solar Wind
Authors: Šafránková Jana , Němeček Zdeněk , Němec František , Montagud-Camps Victor , Verscharen Daniel , Verdini Andrea , Ďurovcová Tereza
Published: May 2021

We present a large statistical study of the fluctuation anisotropy in minimum variance (MV) frames of the magnetic field and solar wind velocity. We use 2, 10, 20, and 40 minute intervals of simultaneous magnetic field (the Wind spacecraft) and velocity (the Spektr-R spacecraft) observations. Our study confirms that magnetic turbulence is a composite of fluctuations varying along the mean magnetic field and those changing in the direction perpendicular to the mean field. Regardless of the length scale within the studied range of spacecraft-frame frequencies, ≈90% of the observed magnetic field fluctuations exhibit an MV direction aligned with the mean magnetic field, ≈10% of events have the MV direction perpendicular to the background field, and a negligible portion of fluctuations has no preferential direction. On the other hand, the MV direction of velocity fluctuations tends to be distributed more uniformly. An analysis of magnetic compressibility and density fluctuations suggests that the fluctuations resemble properties of Alfvénic fluctuations if the MV direction is aligned with background magnetic field whereas slow-mode-like fluctuations have the MV direction perpendicular to the background field. The proportion between Alfvénic and slow-mode-like fluctuations depends on plasma β and length scale: the dependence on the solar wind speed is weak. We present 3D numerical MHD simulations and show that the numerical results are compatible with our experimental results.
Multiwavelength Follow-up of FRB180309
Authors: Aggarwal Kshitij , Burke-Spolaor Sarah , Tejos Nicolas , Pignata Giuliano , Xavier Prochaska J. , Ravi Vikram , Kaczmarek Jane F. , Osłowski Stefan
Published: May 2021

We report on the results of multiwavelength follow-up observations with Gemini, Very Large Array (VLA), and Australia Telescope Compact Array to search for a host galaxy and any persistent radio emission associated with FRB 180309. This FRB is among the most luminous FRB detections to date, with a luminosity of >8.7 × 1032 erg Hz−1 at the dispersion-based redshift upper limit of 0.32. We used the high-significance detection of FRB 180309 with the Parkes Telescope and a beam model of the Parkes Multibeam Receiver to improve the localization of the FRB to a region spanning approximately

∼
2
′
×
2
′

. We aimed to seek bright galaxies within this region to determine the strongest candidates as the originator of this highly luminous FRB. We identified optical sources within the localization region above our r-band magnitude limit of 24.27, 14 of which have photometric redshifts whose fitted mean is consistent with the redshift upper limit (z < 0.32) of our FRB. Two of these galaxies are coincident with marginally detected “persistent” radio sources of flux density 24.3 μJy beam−1 and 22.1 μJy beam−1, respectively. Our redshift-dependent limit on the luminosity of any associated persistent radio source is comparable to the luminosity limits for other localized FRBs. We analyze several properties of the candidate hosts we identified, including chance association probability, redshift, and presence of radio emission; however, it remains possible that any of these galaxies could be the host of this FRB. Follow-up spectroscopy on these objects to explore their Hα emission and ionization contents, as well as to obtain more precisely measured redshifts, may be able to isolate a single host for this luminous FRB.
Building a transnational biodiversity geo-database of the protected areas in the Adriatic-Ionian Macro-Region: approaches and results from the IMPRECO Project
Authors: Zangaro Francesco , Marini Gabriele , Specchia Valeria , De Luca Matteo , Visintin Francesca , Bullo Giovanna , Richard Jacopo , Šalaja Nataša , Rakar Bia , Lipej Bojana , Kurtović Mrčelić Jelena , Piasevoli Gvido , Žuljević Ante , Zaimi Nada , Bejko Djana , Diku Abdulla , Karousou Aliki , Hatziyanni Eleni , Pinat Massimiliano , Pinna Maurizio
Published: May 2021

The main objective of the project Common strategies and best practices to IMprove the transnational PRotection of ECOsystem integrity and services - IMPRECO is to enhance the safeguarding of ecosystems and ecosystem services. Additionally, the aim of this project is to tackle their environmental vulnerability by strengthening the potential of the Protected Areas in biodiversity, ecosystems and ecosystem services conservation. This is expected to be addressed by maintaining it through their transnational networking located in the European Adriatic-Ionian Macro-Region.

The aim of this research is: 1) to characterise the habitats and ecosystems involved in the coastal-marine protected areas considered; 2) to set a biodiversity baseline; 3) to understand what current ecosystems’ conditions are; 4) to build up a transnational biomonitoring programme of target species and habitats and 5) to assess their response to pilot actions. To do so, a transnational inventory of species, habitats, ecosystems and ecosystem services was established, starting with the seven coastal-marine protected areas involved in the project. Data collection was carried out using different sources of information: scientific literature, officially available data from NATURA 2000 Standard Data Forms, checklists from local biomonitoring programmes, personal observations and citizen science, historical maps and data from new in-field analyses. Data were filled in the transnational biodiversity geo-databases according to the NATURA 2000 standards about habitat features, species protection level and species features. The presence of alien species (non-indigenous species, NIS) was also acknowledged and references about data collection were provided in the databases according to the Darwin Core standards.
Success in conserving the bird diversity in tropical forests through private protected areas in Western Ecuador
Authors: Guerrero-Casado José , Seoane José Manuel , Aguirre Nikolay , Torres-Porras Jeronimo
Published: May 2021

Private protected areas have recently attained more importance at a worldwide level as regards nature conservation. Particularly, the specific region of Western Ecuador receives hardly any protection from the State, and private reserves could, therefore, be a suitable tool to ensure the preservation of its forests and their associated wildlife biodiversity. In this work, we compare the bird species richness between private reserves and public protected areas (managed by the State) located in this region. We also show a checklist of bird species found in the Buenaventura Reserve, a private reserve located in south-western Ecuador. Our comparison shows that smaller private reserves may harbour a similar number of bird species than larger protected areas managed by the state, and they have a higher number of bird species per area. In particular, a total of 233 different bird species were registered in Buenaventura, which were distributed in 16 orders and 42 families. Three species were classified as endangered at an international level: El Oro Parakeet (Pyrrhura orcesi), El Oro Tapaculo (Scytalopus robbinsi), and the Grey-backed Hawk (Pseudastur occidentalis), and another three at a national level: the Long-wattled Umbrellabird (Cephalopterus penduliger), the Slaty-winged Foliage-gleaner (Philydor fuscipenne), and the White-vented Plumeleteer (Chalybura buffonii). Therefore, private reserves can be appreciated as a suitable conservation tool for bird conservation, and they should not be undervalued because of their smaller size. Buenaventura Reserve is a good example of how private reserves are extremely important in fragmented landscapes, as is the case with tropical forests in Western Ecuador.
Finding missing diversity from synonyms of Haplopteris (Pteridaceae)
Authors: Wei Zuo-Ying , Xia Zeng-Qiang , Zhang Xian-Chun , Cao Jian-Guo , Yan Yue-Hong
Published: May 2021

Although taxonomists target the remote wild regions to discover new species, taxa lacking a comprehensive and modern systematic treatment may be the new hotspot for biodiversity discovery. The development of molecular systematics integrated with microscopic observation techniques has greatly improved the ability of taxonomists to identify species correctly. Vittaria centrochinensis Ching ex J.F. Cheng, regarded as a synonym of Haplopteris fudzinoi (Makino) E.H.Crane, remained hidden from the eyes of fern taxonomists for more than 20 years. Herein, we collected several population samples of V. centrochinensis by performing molecular phylogenetic analysis of five cpDNA regions (rbcL, atpA, matK, ndhF, and trnL-trnF) and through micromophological observation of specimens which differs from H. fudzinoi by lamina width and exospores. Considering the differences in morphology, geographical range, and genetic distance between these two species, we formally recognized V. centrochinensis as an authentic species and proposed a new combination Haplopteris centrochinensis (Ching ex J.F.Cheng) Y.H.Yan, Z.Y.Wei & X.C.Zhang, comb. nov. Our findings demonstrate that several taxa in synonyms are missing, and nowadays taxonomy should also include re-evaluation of the past taxonomy.
Diverse Mucosal-Associated Invariant TCR Usage in HIV Infection
Authors: Trivedi Shubhanshi , Afroz Taliman , Bennett Michael S , Angell Kendal , Barros Fabio , Nell Racheal A , Ying Jian , Spivak Adam M , Leung Daniel T
Published: May 2021

Mucosal-associated invariant T (MAIT) cells are innate-like T cells that specifically target bacterial metabolites but are also identified as innate-like sensors of viral infection. Individuals with chronic HIV-1 infection have lower numbers of circulating MAIT cells compared with healthy individuals, yet the features of the MAIT TCR repertoire are not well known. We isolated and stimulated human PBMCs from healthy non-HIV–infected donors (HD), HIV-infected progressors on antiretroviral therapy, and HIV-infected elite controllers (EC). We sorted MAIT cells using flow cytometry and used a high-throughput sequencing method with bar coding to link the expression of TCRα, TCRβ, and functional genes of interest at the single-cell level. We show differential patterns of MAIT TCR usage among the groups. We observed expansions of certain dominant MAIT clones in HIV-infected individuals upon Escherichia coli stimulation, which was not observed in clones of HD. We also found different patterns of CDR3 amino acid distributions among the three groups. Furthermore, we found blunted expression of phenotypic genes in HIV individuals; most notably, HD mounted a robust IFNG response to stimulation, whereas both HIV-infected progressors and EC did not. In conclusion, our study describes the diverse MAIT TCR repertoire of persons with chronic HIV-1 infection and suggest that MAIT clones of HIV-infected persons may be primed for expansion more than that of noninfected persons. Further studies are needed to examine the functional significance of unique MAIT cell TCR usage in EC.
Spanish for STEM in US Higher Education: A Historical Review and Future Perspectives
Authors: Pérez Oscar A.
Published: May 2021

This article examines the long tradition of Spanish-language learning for scientific and technological purposes in the United States. It provides a review of some of the historical approaches for designing course offerings and programs of Spanish for STEM (science, technology, engineering, and mathematics) at the college level. These historical approaches help us better understand the unique challenges Spanish for STEM educators and scholars have faced at different times and the perspectives that have shaped the current state of the field. The author also describes current pedagogical models within the field of Languages for Specific Purposes (LSP) but also International Engineering Education (IEE) and Cultures and Languages Across the Curriculum (CLAC). Finally, the author articulates future perspectives and possible directions of the field, including more emphasis on needs-analysis curriculum design and more active engagement with developments in other geographies, language traditions, and areas of LSP. This article seeks to encourage the growth of Spanish for STEM at institutions of higher education, whether in language departments or science and engineering programs.
Backward Design for LSP: Domain Analysis as a Consistent Research Framework for a Necessarily Decentralized Field
Authors: Lear Darcy W. , Guerra Verónica Moraga
Published: May 2021

This conceptual article examines current approaches to languages for specific purposes (LSP) course design, including the American Council on the Teaching of Foreign Languages (ACTFL) backward design model and needs assessments, then explains domain analysis and its history before proceeding with a “how-to” for using domain analysis in backward design for LSP. The authors walk through the process of conducting research using the domain analysis framework that leads to the development of real-world proficiency targets that can be systematically assessed. Once summative proficiency tasks and tests are developed, evidence-centered curricular (re)design can take place. Throughout, the authors will provide illustrative examples from two larger research projects on Spanish for social work and legal Spanish.
Management of Lasiodiplodia theobromae, the causal agent of mango tree decline disease in Ghana
Authors: Ablormeti F.K. , Coleman S.R. , Honger J.O. , Owusu E. , Bedu I. , Aidoo O.F. , Cornelius E.W. , Odamtten G.T.
Published: May 2021

Mango (Mangifera indica L.), is one of the economically most important crops in Ghana. It is recognised for its popularity in contributing to food and nutritional security. Despite its economic importance, mango tree decline disease, caused by Lasiodiplodia theobromae, poses a serious threat to the mango industry in the country. The objective of this study was to evaluate fungicides (i.e., carbendazim, zamir, mancozeb, funguran and sulphur 80) and bio pesticides (Chromolaena odorata, Azadirachta indica and Carica papaya) against L. theobromae. The results showed that all the tested fungicides, except for sulphur 80, inhibited mycelial radial growth of L. theobromae, with carbendazim and funguran improving the vegetative growth of the shoots and leaves in the field. Mango trees treated with carbendazim, after the third spray, had no disease symptoms. However, application of urea fertiliser and carbendazim (50 g 15 L-1 water), at a two-week spraying interval in the field, reduced the severity of L. theobromae. Application of biopesticides (plant extracts) showed that C. odorata had the highest efficacy, followed by A. indica and then C. papaya. Although further studies on plant extracts in the field are required, our findings provide important information for the development of integrated management strategies for the pathogen, and the disease it transmits.
Fatty Acid Composition and Sensory Evaluation of African Catfish, Clarias gariepinus Reared under Different Culture Enclosures
Authors: Oluwalola O.I , Fagbenro O.A
Published: May 2021

This study was carried out to determine the fatty acid composition and sensory quality of Clarias gariepinus from different culture enclosures (plastic, sandcrete tanks and earthen ponds), at the Teaching and Research Farm of Department of Fisheries and Aquaculture Technology, Federal University of Technology, Akure, Ondo State, Nigeria. The comparative work was carried out to find out if habitat could influence the nutrient composition of the fish. Standard procedures were used in the analysis of tissue nutrient. Sensory evaluation study revealed differences in taste and texture indices considered for C. gariepinus reared in plastic, sandcrete tanks and earthen ponds (p<0.05). Fatty acid profiles of C. gariepinus were determined using Gas chromatography-mass spectrometry (GC-MS) method. The percentage of saturated and unsaturated fatty acids was higher (49.99%, 23.17%) in earthen pond cultured C. gariepinus than the plastic and sandcrete tanks. The study revealed that C. gariepinus raised in earthen pond possess fatty acid composition and sensory quality advantages over the plastic and sandcrete tanks.

Keywords: Fatty acids, Sensory evaluation, Culture enclosures, Clarias gariepinus
Neuroprotective effect of thiamine triethylorthoformate conjugate against Parkinson disease in a mouse model
Authors: Dong Yan , Xu Qing , Jia Xi , Li Chao , Xu Dan , Jiao Yang
Published: May 2021

Purpose: To investigate the effect of thiamine triethylorthoformate conjugate (TTO) on Parkinson disease (PD) in vitro and in vivo in a mice model.

Methods: The effect of TTO on behavioural changes in PD mouse model was studied using pole, traction and swimming tests. Astrocyte proliferation after TTO treatment was assessed using 3 (4, 5 dimethyl 2 thi¬azolyl) 2, 5 diphenyl 2 H tetrazolium bromide (MTT) assay. Apoptosis was determined with flow cytometry using Annexin V Fluorescein isothiocyanate kit.

Results: Treatment of PD mice with TTO led to a decrease in climbing time, increase in suspension score and enhancement of swimming score, when compared to the untreated group (p < 0.05). Treatment of astrocytes with TTO prior to MPP incubation significantly increased proliferation (p < 0.05). Apoptosis induction in astrocytes by MPP was attenuated by pre-treatment with TTO. Pre-treatment of astrocytes with 10 µM TTO markedly reduced JNK activation, when compared to astrocytes incubated with MPP alone (p < 0.05). Up-regulation of Bax and down-regulation of Bcl 2 by MPP in astrocytes were attenuated by pre-treatment with TTO. MPP-induced up-regulation of cleaved caspase 3 was suppressed in astrocytes by TTO pre-treatment (p < 0.05).

Conclusion: Treatment with TTO prevents MPP+ -induced neuronal damage in vitro in astrocytes and in vivo in mice. The neuro-protective effect of TTO involves down-regulation of JNK activation, inhibition of caspase-3 level, decrease in Bax and increase in Bcl-2 expression. Thus, TTO has a potential for use in the treatment of Parkinson’s disease.
Determination of the Relationship Between the Level of Work-Family Life Conflict and Job Productivity and Work Stress in Nurses
Authors: DEMİR Burcu , YILDIZ Metin
Published: May 2021

Objective: This study aims to determine how nurses' work-family life conflict level affects job productivity and work stress.Method: This cross-sectional study was conducted between May and July 2018. No sampling was performed; the study was conducted with 95 nurses who agreed to participate in the study among 231 nurses working in a public hospital. The data were collected using the Socio-demographic form, Work-Family Life Conflict Scale, Attitude Scale on Productivity, and Work Stress Scale. The data were analyzed using SPSS-22 statistical software.Results: The nurses were found to have a moderate-level (3.34±0.90) mean score in the Work-Family Life Conflict Scale. They were also found to receive a moderate-level score in the Attitude Scale on Productivity (49.17±3.74). However, it was found that when the working conditions worsened, their productivity decreased and family-work life conflict and work stress increased. In addition, dedication to the job was found to increase as the family-work conflict and work stress increased.Conclusion: High dedication to the job indicates that individuals try to be happy by establishing a psychological balance by giving priority to their work and by giving importance to their job. This study is believed to contribute to future studies that aim to increase nurses' productivity and decrease their work stress. It is recommended to do this work in larger groups and to make initiatives to reduce work stress and increase productivity in order to ensure work-family life balance.
Diyetisyenlerin Bireysel Beslenme Danışmanlığını Etkileyen Etmenler Hakkındaki Düşünceleri ve İş Doyumu
Authors: ONGAN Dilek , AYER Çağla , ÇANKAYA Emel , ÇİFTÇİ Zeynep , SONGÜR BOZDAĞ Ayşe Nur
Published: May 2021

Amaç: Diyetisyenlerin iş doyumunu etkileyen faktörlerin iyileştirilmesi, iş doyumunun yükseltilmesi, bireylerin/toplumun beslenme ve sağlık durumunun iyileştirilmesine katkıda bulunabilir. İzmir’de çalışan diyetisyenlerin bireysel beslenme danışmanlığı ile ilişkili faktörler hakkındaki düşüncelerinin incelenmesi, iş doyumu ile iş doyumunu etkileyen faktörlerin saptanması amaçlanmıştır.Yöntem: Tanımlayıcı tipteki bu araştırma, İzmir’de çalışan diyetisyenlerle (n=183) yürütülmüştür. Verilerin elde edilmesinde literatür taramasıyla oluşturulan anket formu ve İş Doyumu Ölçeği (Job Satisfaction Survey-JSS) kullanılmıştır. Ki-kare, bağımsız gruplarda t testi, one-way ANOVA, tukey testi, lineer regresyon analizi (enter modeli) kullanılmış, p<0.05 istatistiksel olarak önemli kabul edilmiştir.Bulgular: Diyetisyenlerin yaş ortalaması 31.9±8.84 yıl olup, %89.1’i kadındır. Diyetisyenlerin %34.4’ü kamuda, %38.8’i özel sektörde, %26.8’i kendi iş yerinde çalışmaktadır. Diyetisyenlerin JSS puanı 127.72±34.47 olup, iş doyumu düşüktür. Yüksek lisans mezunlarının, özel sektörde ve klinik alanda çalışanların, gelirini yeterli bulan, mesleğini çevresine öneren diyetisyenlerin ortalama iş doyumu puanı daha yüksektir (p<0.05). Lineer regresyon analizine göre diyetisyenlerin çalışma sektörü; özelden kamuya, kamudan iş yeri sahibine doğru ilerledikçe iş doyumu azalmaktadır. Diyetisyenler beslenme danışmanlığında sosyal medyanın etkili olduğunu, sosyal medyanın insanları beslenme açısından kısmen doğru yönlendirdiğini düşünmekte, medyada beslenme bilgisi verilmesini doğru bulmamakta, internet üzerinden verilen beslenme danışmanlığını yeterli bulmamaktadır. Diyetisyenlere göre danışan motivasyonunda en önemli etmenler; diyetisyenin yüz ifadesi, beden dili, kararlı tutumu, gerçekçi hedefler belirlemesi, görünüşü ve özgüvenidir.Sonuç: Beslenme danışmanlığı ve iş doyumuna ilişkin bu veriler, mesleki kuruluşlar ve eğitim planlayıcıları için yol gösterici olabilir. İş doyumunu etkileyen etmenlerin daha derinlemesine incelenmesi için nitel verilerle desteklenen daha fazla nicel çalışmaya ve iş doyumunu arttıracak faktörlere odaklanan çalışmalara ihtiyaç vardır.
One more proof of Siegel's theorem
Authors: Ramachandra K
Published: May 2021

This paper gives a new elementary proof of the version of Siegel's theorem on $L(1,\chi)=\sum_{n=1}^{\infty}\chi(n)n^{-1}$ for a real character $\chi(\!\!\!\!\mod k)$. The main result of this paper is the theorem: If $3\leq k_1\leq k_2$ are integers, $\chi_1(\!\!\!\!\mod k_1)$ and $\chi_2(\!\!\!\!\mod k_2)$ are two real non-principal characters such that there exists an integer $n>0$ for which $\chi_1(n)\cdot\chi_2(n)=-1$ and, moreover, if $L(1,\chi_1)\leq10^{-40}(\log k_1)^{-1}$, then $L(1,\chi_2)>10^{-4} (\log k_2){-1}\cdot(\log k_1)^{-2}k_2^{-40000L(1,\chi_1)}$. From this the result of T. Tatuzawa on Siegel's theorem follows.
On algebraic differential equations satisfied by some elliptic functions II
Authors: Chowla P , Chowla S
Published: May 2021

In (I) we obtained the ``implicit'' algebraic differential equation for the function defined by $Y=\sum_1^{\infty}\frac{n^a x^n}{1-x^n}$ where $a$ is an odd positive integer, and conjectured that there are no algebraic differential equations for the case when $a$ is an even integer.

In this note we obtain a simple proof that (this has been known for almost 200 years)
$$Y=\sum_1^{\infty}x^{n^2}~~~~(\vert x\vert<1)$$
satisfies an algebraic differential equation, and conjecture that $Y=\sum_1^{\infty} x^{n^k}$ (where $k$ is a positive bigger than $2$) does not satisfy an algebraic differential equation.
A trivial remark on Goldbach conjecture
Authors: Ramachandra K
Published: May 2021

Using a variation on the circle method, we provide another proof of a theorem of Srinivasan in his paper titled ``A remark on Goldbach's problem''.
On the frequency of Titchmarsh's phenomenon for $\zeta(s)$ IX.
Authors: Ramachandra K
Published: May 2021

In the previous paper in this series, we proved a lower bound for $f(H)=\min_{T\geq1}\max_{T\leq t\leq T+H}\vert(\zeta(1+it))^z\vert,$ where $z=\exp(i\theta)$ and $0\leq\theta<2\pi$. In this paper, we prove an upper bound for $f(H)$ and present some applications.
On sets of coprime integers in intervals
Authors: Erdös Paul , Sárközy András
Published: May 2021

If $\mathcal{A}\subset\mathbb{N}$ is such that it does not contain a subset $S$ consisting of $k$ pairwise coprime integers, then we say that $\mathcal{A}$ has the property $P_k$. Let $\Gamma_k$ denote the family of those subsets of $\mathbb{N}$ which have the property $P_k$. If $F_k(n)=\max_{\mathcal{A}\subset\{1,2,3,\ldots,n\},\mathcal{A}\in\Gamma_k}\vert\mathcal{A}\vert$ and $\Psi_k(n)$ is the number of integers $u\in\{1,2,3,\ldots,n\}$ which are multiples of at least one of the first $k$ primes, it was conjectured that $F_k(n)=\Psi_{k-1}(n)$ for all $k\geq2$. In this paper, we give several partial answers.
A large value theorem for $\zeta(s)$.
Authors: Ramachandra K
Published: May 2021

In this paper, we prove a slight improvement of Huxley's zero-density estimate for $\zeta(s)$ near the line ${\rm Re}(s)=\frac{3}{4}$.
Notes on the Riemann zeta Function-III
Authors: Balasubramanian R , Ramachandra K , Sankaranarayanan A , Srinivas K
Published: May 2021

For a good Dirichlet series $F(s)$ (see Definition in \S1) which is a quotient of some products of the translates of the Riemann zeta-function, we prove that there are infinitely many poles $p_1+ip_2$ in $\Im (s)>C$ for every fixed $C>0$. Also, we study the gaps between the ordinates of the consecutive poles of $F(s)$.
Mean square of the Hurwitz zeta-function and other remarks
Authors: Balasubramanian R , Ramachandra K
Published: May 2021

The Hurwitz zeta-function associated with the parameter $a\,(0< a\leq1)$ is a generalisation of the Riemann zeta-function namely the case $a=1$. It is defined by $$\zeta(s,a)=\sum_{n=0}^{\infty}(n+a)^{-s},\,(s=\sigma+it,\,\sigma>1)$$ and its analytic continuation.

%In fact $$\zeta(s,a)=\sum_{n=0}^{\infty}\left((n+a)^{-s}-\int_{n}^{n+1}\frac{du}{(u+a)^s} \right)+\frac{a^{1-s}}{s-1}$$ gives the analytic continuation to $(\sigma>0)$. A repetition of this several times shows that $$\zeta-\frac{a^{1-s}}{s-1}$$ can be continued as an entire function to the whole plane. In $Re(s)\geq-1,\,t\geq2,\,\zeta(s,a)-a^{-s}=O(t^3)$ and by the functional equation (see \S2) it is $$O\left(\left(\frac{\vert s\vert}{2\pi}\right)^{\frac{1}{2}-Re(s)}\right)$$ in $Re(s)\leq-1,\,t\geq2$. From these facts
In this paper, we deduce an `Approximate function equation' (see \S3), which is a generalisation of the approximate functional equation for $\zeta(s)$. Combining this with an important theorem due to van-der-Corput, we prove $$T^{-\frac{1}{3}}\int_{T}^{T+T^{\frac{1}{3}}} \vert\zeta(\frac{1}{2}+it)-a^{-\frac{1}{2}-it}\vert^2 dt <\!\!\!< (\log T)^3$$ uniformly in $a(0< a\leq1)$. From this we deduce similar results for quasi $L$-functions and more general functions.
%Let $a_1, a_2,\ldots$, be any periodic sequence of complex numbers for which the sum over a period is zero. Let $b_1, b_2,\ldots$ be any sequence of complex numbers for which $\sum_{j=2}^{n}\vert b_j-b_{j-1}\vert+\vert b_n\vert\leq n^{\varepsilon}$ for every $\varepsilon>0$ and every $n\geq n_0(\varepsilon)$. Then we prove $$T^{-\frac{1}{3}}\int_{T}^{T+T^{\frac{1}{3}}} \vert\sum_{n=1}^{\infty}\frac{a_nb_n}{(n+a)^{\frac{1}{2}+it}}\vert^2\,dt\leq T^{\varepsilon}$$ for every $\varepsilon>0$ and every $T\geq T_0(\varepsilon)$. Here, as usual, $0<a\leq1$ and $T_0(\varepsilon)$ is independent of $a$.
A generalization of Bochner's formula
Authors: Kanemitsu S , Tanigawa Y , Tsukada H
Published: May 2021

In this note we expound our general hierarchy theorems by the example of a Ramified-Type Functional Equarion H, which gives all possbile forms, in terms of se-ries with H-function coefficients, of the functional equation of higher hierarchy arising from the original ramified one satisfied by the Dirichlet series. Then by sepcifying the parameters, we shall deduce a few concrete examples scattered in the literature in the most natural way.
On an exponential sum involving the Möbius function
Authors: Maier H. , Sankaranarayanan A
Published: May 2021

In this paper we study the upper bound for the absolute value of the exponential sum related to the Möbius function unconditionally and present some interesting applications also.
On the periodic Hurwitz zeta-function.
Authors: Javtokas A , Laurinčikas A
Published: May 2021

In this paper, an universality theorem in the Voronin sense for the periodic Hurwitz zeta-function is proved.
The number of imaginary quadratic fields with a given class number
Authors: Soundararajan K
Published: May 2021

This paper formulates some conjectures for the number of imaginary quadratic fields of a given class number. It establishes an asymptotic formula for the number of such fields with class number below $H$, and also shows that many fields have class numbers lying outside a very thin set.
On the Barban-Davenport Halberstam theorem: XIX
Authors: Hooley C
Published: May 2021

The present paper deals with the dispersion $$G(x,Q)=\sum_{k\leq Q}\sum_{0\frac{1}{12}\{\Gamma(C)+o(1)\}Q^2+O(x \log_{-A}x)$ when $x/Q\rightarrow\infty$ where $\Gamma(C)$ is an explicitly defined function of $C$.
On Kronecker's limit formula and the hypergeometric function.
Authors: Kanemitsu S , Tanigawa Y , Tsukada H
Published: May 2021

The Kronecker limit formula for a positive definite binary quadratic form or the Dedekind zeta-function of an imaginary quadratic field is quite well-known and there exists an enormous amount of literature pertaining to its proof and applications. Here we give a different kind of proof depending on the hypergeometric transform. The idea goes back to Koshilyakov and we adopted it in this note to give a new derivation of the formula. Here the connection formula for the hypergeometric function plays an essential role.
On mean value results for the Riemann zeta-function in short intervals.
Authors: Ivić Aleksandar
Published: May 2021

We discuss the mean values of the Riemann zeta-function $\zeta(s)$, and analyze upper and lower bounds for
$$\int_T^{T+H} \vert\zeta(\frac{1}{2}+it)\vert^{2k}\,dt~~~~~~(k\in\mathbb{N}~{\rm fixed,}~1<\!\!< H \leq T).$$
In particular, the author's new upper bound for the above integral under the Riemann hypothesis is presented.
The work of K. Ramachandra in algebraic number theory
Authors: Murty M. Ram
Published: May 2021

We give a brief survey of three papers of K. Ramachandra in algebraic number theory. The first paper is based on his thesis and appeared in the Annals of Mathematics and titled, ``Some Applications of Kronecker's Limit Formula.'' The second paper determines a system of fundamental units for the cyclotomic field and is titled, ``On the units of cyclotomic fields.'' This appeared in Acta Arithmetica. The third deals with relative class numbers and is titled, ``The class number of relative abelian fields.'' This appeared in Crelle's Journal.
On the class number formula of certain real quadratic fields
Authors: Chakraborty K , Kanemitsu S , Kuzumaki T
Published: May 2021

In this note we give an alternate expression of class number formula for real quadratic fields with discriminant $d \equiv 5\, {\rm mod}\, 8$.
%Dirichlet's classical class number formula for real quadratic fields expresses `class number' in somewhat `transcend' manner, which was simplified by P. Chowla in the special case when the discriminant $d = p \equiv 5\,{\rm mod}\, 8$ is a prime. We use another form of class number formula and transform it using Dirichlet's $1/4$-th character sums. Our result elucidates other generalizations of the class number formula by Mitsuhiro, Nakahara and Uhera for general real quadratic fields.
Mean Values of Certain Multiplicative Functions and Artin's Conjecture on Primitive Roots
Authors: Sitaraman Sankar
Published: May 2021

We discuss how one could study asymptotics of cyclotomic quantities via the mean values of certain multiplicative functions and their Dirichlet series using a theorem of Delange. We show how this could provide a new approach to Artin's conjecture on primitive roots. We focus on whether a fixed prime has a certain order modulo infinitely many other primes. We also give an estimate for the mean value of one such Dirichlet series.
New developments on the twin prime problem and generalizations
Authors: Murty M. Ram
Published: May 2021

We give a short survey of some recent remarkable advances on the twin prime problem. Beginning with the breakthrough work of Zhang in May 2013, we trace the developments culminating in the work of Maynard and Tao in November 2013 that led to simplifications and numerical improvements of Zhang's work.
Effective irrationality measures for quotients of logarithms of rational numbers
Authors: Bugeaud Yann
Published: May 2021

We establish uniform irrationality measures for the quotients of the logarithms of two rational numbers which are very close to 1. Our proof is based on a refinement in the theory of linear forms in logarithms which goes back to a paper of Shorey.
Baker's Explicit abc-Conjecture and Waring's problem
Authors: Laishram Shanta
Published: May 2021

The conjecture of Masser-Oesterlé, popularly known as abc-conjecture has many consequences. We show that Waring's problem is a consequence of an explicit version of abc−conjecture due to Baker.
A note on Hardy's theorem
Authors: Sangale Usha K.
Published: May 2021

Hardy's theorem for the Riemann zeta-function ζ(s) says that it admits infinitely many complex zeros on the line (s) = 1 2. In this note, we give a simple proof of this statement which, to the best of our knowledge, is new.
Ramanujan-Fourier series of certain arithmetic functions of two variables
Authors: Ushiroya Noboru
Published: May 2021

We study Ramanujan-Fourier series of certain arithmetic functions of two variables. We generalize Delange's theorem to the case of arithmetic functions of two variables and give sufficient conditions for pointwise convergence of Ramanujan-Fourier series of arithmetic functions of two variables. We also give several examples which are not obtained by trivial generalizations of results on Ramanujan-Fourier series of functions of one variable.
Dual Ramanujan-Fourier series
Authors: Ushiroya Noboru
Published: May 2021

Let cq(n) be the Ramanujan sums. Many results concerning Ramanujan-Fourier series f (n) = ∞ q=1 aqcq(n) are obtained by many mathematicians. In this paper we study series of the form f (q) = ∞ n=1 ancq(n), which we call dual Ramanujan-Fourier series. We extend Lucht's theorem and Delange's theorem to this case and obtain some results.
Fluctuation of the primitive of Hardy's function
Authors: Jutila Matti
Published: May 2021

We consider oscillatory properties of the primitive of Hardy's function including a certain Gibbs phenomenon due to M. A. Korolev.
When are Multiples of Polygonal Numbers again Polygonal Numbers?
Authors: Chahal Jasbir , Griffin Michael , Priddis Nathan
Published: May 2021

Euler showed that there are infinitely many triangular numbers that are three times other triangular numbers. In general, it is an easy consequence of the Pell equation that for a given square-free m > 1, the relation ∆ = m∆' is satisfied by infinitely many pairs of triangular numbers ∆, ∆'. After recalling what is known about triangular numbers, we shall study this problem for higher polygonal numbers. Whereas there are always infinitely many triangular numbers which are fixed multiples of other triangular numbers, we give an example that this is false for higher polygonal numbers. However, as we will show, if there is one such solution, there are infinitely many. We will give conditions which conjecturally assure the existence of a solution. But due to the erratic behavior of the fundamental unit of Q(√ m), finding such a solution is exceedingly difficult. Finally, we also show in this paper that, given m > n > 1 with obvious exceptions, the system of simultaneous relations P = mP' , P = nP'' has only finitely many possibilities not just for triangular numbers, but for triplets P , P' , P'' of polygonal numbers, and give examples of such solutions.
Hybrid level aspect subconvexity for GL(2) × GL(1) Rankin-Selberg L-Functions
Authors: Aggarwal Keshav , Jo Yeongseong , Nowland Kevin
Published: May 2021

Let $M$ be a squarefree positive integer and $P$ a prime number coprime to $M$ such that $P \sim M^{\eta}$ with $0 < \eta < 2/5$. We simplify the proof of subconvexity bounds for $L(\frac{1]{2}, f \otimes \chi)$ when $f$ is a primitive holomorphic cusp form of level $P$ and $\chi$ is a primitive Dirichlet character modulo $M$. These bounds are attained through an unamplified second moment method using a modified version of the delta method due to R. Munshi. The technique is similar to that used by Duke-Friedlander-Iwaniec save for the modification of the delta method.
Set Equidistribution of subsets of (Z/nZ) *
Authors: Chattopadhyay Jaitra , Kumar Veekesh , Thangadurai R
Published: May 2021

In 2010, Murty and Thangadurai [MuTh10] provided a criterion for the set equidistribution of residue classes of subgroups in (Z/nZ) *. In this article, using similar methods, we study set equidistribution for some class of subsets of (Z/nZ) *. In particular, we study the set equidistribution modulo 1 of cosets, complement of subgroups of the cyclic group (Z/nZ) * and the subset of elements of fixed order, whenever the size of the subset is sufficiently large.
A note on some congruences involving arithmetic functions
Authors: Sándor József
Published: May 2021

We consider some congruences involving arithmetical functions. For example, we study the congruences nψ(n) ≡ 2 (mod ϕ(n)), nϕ(n) ≡ 2 (mod ψ(n)), ψ(n)d(n) − 2 ≡ 0 (mod n), where ϕ(n), ψ(n), d(n) denote Euler's totient, Dedekind's function, and the number of divisors of n, respectively. Two duals of the Lehmer congruence n − 1 ≡ 0 (mod ϕ(n)) are also considered.
Explicit abc-conjecture and its applications
Authors: Kwok Chi Chim , Nair Saranya G. , Shorey T. N.
Published: May 2021

We state well-known abc-conjecture of Masser-Oesterlé and its explicit version, popularly known as the explicit abc-conjecture, due to Baker. Laishram and Shorey derived from the explicit abc-conjecture that (1.1) implies that $c < N^{1.75}$. We give a survey on improvements of this result and its consequences. Finally we prove that $c < N^{1.7}$ and apply this estimate on an equation related to a conjecture of Hickerson that a factorial is not a product of factorials non-trivially.
The Barban-Vehov Theorem in Arithmetic Progressions
Authors: Kumar Murty V
Published: May 2021

A result of Barban-Vehov (and independently Motohashi) gives an estimate for the mean square of a sequence related to Selberg's sieve. This upper bound was refined to an asymptotic formula by S. Graham in 1978. In 1992, I made the observation that Graham's method can be used to obtain an asymptotic formula when the sum is restricted to an arithmetic progression. This formula immediately gives a version of the Brun-Titchmarsh theorem. I am taking the occasion of a volume in honour of my friend S. Srinivasan to revisit and publish this observation in the hope that it might still be of interest.
Density modulo 1 of a sequence associated to some multiplicative functions evaluated at polynomial arguments
Authors: Nasiri-Zare Mohammad
Published: May 2021

We study density modulo 1 of the sequence with general term ∑ m≤n f (G(m)) where f is the strongly multiplicative function of the form f (n) = ∏ p|n (1 − ν(p) p) and ν is a multiplicative function for which there exists a real number 0 < r ≤ 1 such that 1 ≤ |ν(p)| ≤ p
On some Lambert-like series
Authors: Agarwal P , Kanemitsu S , Kuzumaki T
Published: May 2021

In this note, we study radial limits of power and Laurent series which are related to the Lerch zeta-function or polylogarithm function. As has been pointed out in [CKK18], there have appeared many instances in which the imaginary part of the Lerch zeta-function was considered by eliminating the real part by considering the odd part only. Mordell studied the properties of the power series resembling Lambert series, and in particular considered whether the limit function is a rational function or not. Our main result is the elucidation of the threshold case of b_n = 1/n studied by Mordell [Mor63], revealing that his result is the odd part of Theorem 1.1 in view of the identities (1.9), (1.5). We also refer to Lambert series considered by Titchmarsh [Tit38] in connection with Estermann's zeta-functions.
NURSING ACTIVITIES SCORE COMO INSTRUMENTO GERENCIAL EM UNIDADE DE TERAPIA INTENSIVA NEONATAL
Authors: Terra Rodrigues Serafim Clarita , Rodrigues Gabrielle Maria , Rondina Pupo da Silveira Raquel , Novelli e Castro Meire Cristina , Queiroz Dell’Acqua Magda Cristina , Molina Lima Silvana Andrea
Published: May 2021

Objetivo: Analisar o uso do Nursing Activities Score como instrumento gerencial frente ao dimensionamento de pessoal de enfermagem em uma Unidade de Terapia Intensiva Neonatal. Método: Trata-se de um estudo transversal, quantitativo, desenvolvido em uma Unidade de Terapia Intensiva Neonatal no período de um ano. Foram realizadas estatísticas descritivas e estimados intervalos de confiança para os índices calculados, considerando p<0,05. Resultados: A amostra constituiu-se de 349 recém-nascidos. O Nursing Activities Score foi aplicado 3.703 vezes, revelando a carga de trabalho da equipe de enfermagem (774,4 pontos). O dimensionamento de pessoal calculado a partir do Nursing Activities Score apresentou-se acima do real e entre os valores preconizados pela legislação brasileira atual. Conclusão: O estudo permitiu concluir que o Nursing Activities Score é um instrumento válido e capaz de estimar a carga de trabalho da equipe de enfermagem bem como nortear o dimensionamento de pessoal em Unidade de Terapia Intensiva Neonatal.
Rancang Bangun Modul Praktikum Penggunaan Fotovoltaik
Authors: Wijayanto Andhika , Karim Khairuddin , Pradana Sunu
Published: May 2021

Abstrak- Peralatan yang umum digunakan untuk pengujian kinerja sel fotovoltaik adalah simulator surya. Rancang bangun modul simulator surya ini berguna sebagai media pembelajaran. Simulator surya ini digunakan sebagai perangkat untuk menggantikan matahari sebagai sumber cahaya alami untuk penyinaran fotovoltaik dengan kondisi laboratorium. Pada perancangan ini dibangun sebuah sistem simulator surya berbasis lampu LED dengan pengendali Arduino. Dengan LED yang digunakan berjenis LED daya tinggi dengan beberapa jenis warna LED, memungkinkan intensitas yang dihasilkan lebih besar dibanding LED indikator dan untuk membandingkan pengaruh setiap spektrum warna terhadap daya keluaran dari fotovoltaik. Berdasarkan hasil pengujian modul simulator surya untuk penggunaan fotovoltaik ini, daya yang dihasilkan terhadap modul fotovoltaik 10 WP pada penyinaran maksimal LED yaitu tegangan rangkaian terbuka dapat mencapai 18 V dan arus hubung singkat adalah 42 mA.