bluuebunny/crossref_metadata_2025 huggingface dataset:
Sports Sentiment and Stock Returns: The Bombay Stock Exchange
Authors: Beer Francisca M. , Lin Frank
Published: July 2019

Problem/Relevance: This study is motivated by psychological evidence of a strong connection between sporting event outcomes and mood. To evaluate this connection, we analyze the Indian stock market reaction to sudden changes in investors’ mood captured by India’s cricket results. By focusing on a rarely studied mood variable and a
very infrequently studied stock exchange, this study adds to our understanding of the association between sporting event outcomes and mood.

Research Objective/Questions: In this study, we investigate the impact of cricket wins and losses on the Bombay Stock Exchange. We hypothesize that cricket wins or losses will drive investors’ mood substantially and unambiguously so that the game outcomes will be powerful enough to impact asset prices. We also evaluate the hypothesis that losses are psychologically more powerful than wins.

Methodology: We analyze the daily data from the Bombay Stock Exchange using the methodology of Edmonds et al. (2007). This methodology has the advantages of capturing the Bombay Stock Exchange stock returns timevarying volatility through a GARCH model.

Major Fundings: Our findings show that cricket wins and losses do not impact the Bombay Stock Exchange. On the exchange, stock prices reflect relevant information. Our results are thus consistent with the Efficient Market Hypothesis.

Implication(s): Our results imply that on the Bombay Stock Exchange, cricket wins and losses cannot be reliably used by investors and portfolio managers to achieve returns in excess of the average market returns on a risk-adjusted basis.
Internal Control Weakness and Managerial Myopia: Evidence from SOX Section 404 Disclosures
Authors: Ji Amy E.
Published: July 2019

Problem/ Relevance: Managerial myopia is an important issue of interests to academics, practitioners, and regulators as managers have been condemned for their obsession with short-term earnings and myopic investment decisions that sacrifice firms’ long term value for shareholders. This article contributes by examining whether the quality of firms’ internal controls over financial reporting (ICFR) is associated with managerial myopia.

Research Objective/ Questions: The purpose of this study is to examine whether managers in firms reporting material internal control weaknesses (ICW) under Section 404 of the Sarbanes-Oxley Act (SOX) of 2002 engage in myopic behaviors more than those in firms without reporting ICW.

Methodology: The study uses the logit regression model to investigate a sample obtained from Compustat for the period of 2005-2013.

Major Findings: The study finds a positive association between internal control weaknesses reported by auditors under Section 404 of the SOX and managerial short-termism which is measured by the probability of cutting R&D expenses in the current year from the previous year.

Implications: Whereas prior studies mostly examine the impact of internal controls on accounting quality, this study demonstrates the implication of internal controls beyond financial reporting quality by showing an association between internal control quality and managerial myopia. Future research may further investigate the association between firms’ financial reporting quality and managerial investment decisions.
Tindak Tutur Imperatif Tenaga Kesehatan Pada Pasien (Keluarga Pasien) di Rumah Sakit Umum Daerah Abdul Wahab Syahranie Samarinda (Tinjauan Pragmatik)
Authors: Amiruddin Amiruddin , Rahman Gajali
Published: July 2019

ABSTRAK

Penelitian ini bertujuan menjelaskan tindak tutur imperatif Tenaga Kesehatan pada pasien (Keluarga Pasien) dan dampak tindak tutur imperatif tenaga kesehatan terhadap persepsi (perilaku) pasien di Rumah Sakit Umum Daerah Abdul Wahab Syahranie Samarinda.

Metode yang digunakan, yaitu metode deskriptif kualitatif. Pengumpulan data  menggunakan tehnik wawancara mendalam dan tehnik merekam.  Sampel penelitian, yaitu dialog antara tenaga kesehatan dan pasien. Tehnik penyampelan yang digunakan, yaitu  sampel purposif. Data dianalisis berdasarkan teori speech act/tindak tutur (kajian Pragmatik).

Hasil penelitian menunjukkan bahwa ada 19 jenis tindak tutur imperatif tenaga kesehatan pada pasien di Rumah Sakit Umum Daerah Abdul Wahab Syahranie Samarinda, yakni : persilahan, permintaan, ajakan, harapan, larangan, desakan, perintah, bujukan, umpatan, anjuran, penolakan, menginformasikan, menunjukkan arah, penegasan, himbauan, suruhan, kesanksian, pemberian sugesti, dan meminta kesiapan.

Kemudian dampak tindak tutur imperatif tenaga kesehatan terhadap persepsi (perilaku) pasien di Rumah Sakit Umum Daerah Abdul Wahab Syahranie Samarinda terdiri dari 2 kategori yakni perilaku berbahasa (tindak tutur) sopan dan perilaku berbahasa (tindak tutur) tidak sopan.

Kata Kunci: Tenaga Kesehatan, Tindak Tutur Imperatif, Pasien/Keluarga Pasien.
Studi Asuhan Kebidanan Komprehensif di Praktik Mandiri Bidan yang Terstandarisasi APN
Authors: Noorbaya Siti , Johan Herni , Reni Dian Puspita Reni
Published: July 2019

Jumlah AKI sangat tinggi di dunia, pada tahun 2016 lebih dari 216 per 100.000 kelahiran hidup perempuan meninggal setiap hari akibat komplikasi kehamilan dan kelahiran anak, tercatat 800 perempuan meninggal setiap harinya. Berdasarkan data Kementrian Kesehatan jumlah AKI di Indonesia pada tahun 2016 yaitu 305 kematian ibu per 100.000 kelahiran hidup, sedangkan AKB sebesar 22,23 per 1.000 kelahiran hidup. AKI di Kaltim masih tinggi sebanyak 137 orang dari jumlah hidup lahir sebanyak 69,372 orang dan AKB sebanyak 7 bayi. Hal ini menjadi ironi karena untuk mencapai target SDG,s hingga tahun 2030 adalah mengurangi AKI dibawah 70 per 100.000 kelahiran hidup dan pada 2030 mengakhiri kematian bayi dan balita yang dapat dicegah. Untuk itu peran bidan sebagai tenaga kesehatan melakukan continuity of care yang sudah terstandarisasi APN mampu menurunkan AKI dan AKB. Penelitian ini bertujuan mendiskripsikan pelaksanaan asuhan kebidanan komprehensif di Praktik Bidan Mandiri yang terstandarisasi APN Samarinda. Metode yang digunakan yaitu diskriptif kualitatif dengan pendekatan studi kasus. Subyek penelitian adalah ibu hamil trimester III. Hasil penelitian yaitu asuhan komprehensif (Continuity of Care) yang diberikan mulai dari kehamilan, persalinan, bayi baru lahir, nifas, neonatus sampai dengan asuhan KB berjalan normal tidak ada data yang mengarah kegawatdaruratan ataupun patologis dan tidak ada kesenjangan antara teori dengan praktik. Dari hasil penelitian dapat disimpulkan bahwa asuhan komprehensif yang diberikan kepada pasien mulai dari kehamilan, persalinan, bayi baru lahir, nifas, neonatus sampai dengan asuhan KB mendapatkan hasil fisiologis dan dapat mencegah kegawatdaruratan maternal dan neonatal
Perilaku Warga Peduli AIDS terhadap Penanggulangan HIV dan AIDS Di Kota Kupang
Authors: Fernandez Wenzel , Manurung Imelda February Ester , Toy Sarcy M , Ndoen Honey I
Published: July 2019

The AIDS Tackling Committee (KPA) of KupangCity has been running several programs handling over the AIDS and HIV. One of the program is involving ordinary member of the society through AIDS Care Community Member. This research aim is to describe knowledge, attitude, and behavior of AIDS Care Community Members towards HIV and AIDS Tackling Program. This research is a survey, descriptive in nature. It was held from October 2017 to March 2018. The research population is 625. By using Slovin formula and simple random sampling technique, the sample is 93. The research results are as follows: the majority of the community member possessed a good knowledge (74%), all of the community members (100%) showed a positive attitude on the effort and 60,2% of the members of the community have conducted supportive acts towards the effort.  Therefore, it is suggested that, there should be some upgrading’s on cadres capacity, especially their active involvement in mobilizing the society to conduct some supportive acts. Finally, it is expected that the overall society participation in tackling HIV and AIDS should be uplifted.
A photochemical determination of luminescence efficiency of upconverting nanoparticles
Authors: AMOUROUX Baptiste , ROUX Clément , MICHEAU Jean-Claude , GAUFFRE Fabienne , COUDRET Christophe M
Published: July 2019

Upconverting nanoparticles are a rising class of non-linear luminescent probes burgeoning since the beginning of the 2000’s, especially for their attractiveness in biology. However, the precise quantification of the light delivered remains a hot problem in order to estimate the impact in biology, resulting in the development by a few teams of sophisticated photophysical measurements (operable under NIR excitation). Here, we present the first attempt towards a simple and cheap photochemical approach consisting of a pseudo-actinometric characterization of the green emission of NaYF4:Yb,Er. Using the recently calibrated actinometer 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)-3,3,4,4,5,5-hexafluoro-1-cyclopentene operating in the green region of the visible spectra, we propose simple photochemical experiments to get an accurate estimation of the efficiency of these green-emitting “nanolamps”. The agreement of the collected data with the previous published results validates this approach.
Newly Discovered Bright z ∼ 9–10 Galaxies and Improved Constraints on Their Prevalence Using the Full CANDELS Area
Authors: Bouwens R. J. , Stefanon M. , Oesch P. A. , Illingworth G. D. , Nanayakkara T. , Roberts-Borsani G. , Labbé I. , Smit R.
Published: July 2019

We report the results of an expanded search for z ∼ 9–10 candidates over the ∼883 arcmin2 CANDELS+ERS fields. This study adds 147 arcmin2 to the search area we consider over the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS) COSMOS, UDS, and EGS fields, while expanding our selection to include sources with bluer J
125 − H
160 colors than our previous J
125 − H
160 > 0.5 mag selection. In searching for new z ∼ 9–10 candidates, we make full use of all available Hubble Space Telescope (HST), Spitzer/IRAC, and ground-based imaging data. As a result of our expanded search and use of broader color criteria, three new candidate z ∼ 9–10 galaxies are identified. We also find again the z = 8.683 source previously confirmed by Zitrin et al. This brings our sample of probable z ∼ 9–11 galaxy candidates over the CANDELS+ERS fields to 19 sources in total, equivalent to one candidate per 47 arcmin2 (one per 10 WFC3/IR fields). To be comprehensive, we also discuss 28 mostly lower likelihood z ∼ 9–10 candidates, including some sources that seem to be reliably at z > 8 using the HST+IRAC data alone, but which the ground-based data show are much more likely at z < 4. One case example is a bright z ∼ 9.4 candidate, COS910-8, which seems instead to be at z ∼ 2. Based on this expanded sample, we obtain a more robust luminosity function (LF) at z ∼ 9 and improved constraints on the volume density of bright z ∼ 9 and z ∼ 10 galaxies. Our improved z ∼ 9–10 results again reinforce previous findings for strong evolution in the UV LF at z > 8, with a factor of ∼10 evolution seen in the luminosity density from z ∼ 10 to z ∼ 8.
ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia∗
Authors: Chen Ping , Dong Subo , Katz Boaz , Kochanek C. S. , Kollmeier Juna A. , Maguire K. , Phillips M. M. , Prieto J. L. , Shappee B. J. , Stritzinger M. D. , Bose Subhash , Brown Peter J. , Holoien T. W.-S. , Galbany L. , Milne Peter A. , Morrell Nidia , Piro Anthony L. , Stanek K. Z. , Thompson Todd A. , Young D. R.
Published: July 2019

We report comprehensive multi-wavelength observations of a peculiar Type Ia-like supernova (“SN Ia-pec”) ASASSN-15pz. ASASSN-15pz is a spectroscopic “twin” of SN 2009dc, a so-called “Super-Chandrasekhar-mass” SN, throughout its evolution, but it has a peak luminosity

that is

dimmer and comparable to the SN 1991T sub-class of SNe Ia at the luminous end of the normal width-luminosity relation. The synthesized 56Ni mass of

is also substantially less than that found for several 2009dc-like SNe. Previous well-studied 2009dc-like SNe have generally suffered from large and uncertain amounts of host-galaxy extinction, which is negligible for ASASSN-15pz. Based on the color of ASASSN-15pz, we estimate a host extinction for SN 2009dc of

and confirm its high luminosity (

). The 2009dc-like SN population, which represents ∼1% of SNe Ia, exhibits a range of peak luminosities, and do not fit onto the tight width-luminosity relation. Their optical light curves also show significant diversity of late-time (≳50 days) decline rates. The nebular-phase spectra provide powerful diagnostics to identify the 2009dc-like events as a distinct class of SNe Ia. We suggest referring to these sources using the phenomenology-based “2009dc-like SN Ia-pec” instead of “Super-Chandrasekhar SN Ia,” which is based on an uncertain theoretical interpretation.
Prospects for Detecting X-Ray Polarization in Blazar Jets
Authors: Liodakis Ioannis , Peirson Abel L. , Romani Roger W.
Published: July 2019

X-ray polarization should provide new probes of magnetic field geometry and acceleration physics near the base of blazar jets, but near-future missions will have limited sensitivity. We thus use existing lower energy data and X-ray variability measurements in the context of a basic synchro-Compton model to predict the X-ray polarization level and the probability of detection success for individual sources, listing the most attractive candidates for an Imaging X-ray Polarimetry Explorer campaign. We find that, as expected, several high-peak blazars such as Mrk 421 can be easily measured in 100 ks exposures. Most low-peak sources should only be accessible to triggered campaigns during bright flares. Surprisingly, a few intermediate peak sources can have anomalously high X-ray polarization and thus are attractive targets.
JCMT BISTRO Survey Observations of the Ophiuchus Molecular Cloud: Dust Grain Alignment Properties Inferred Using a Ricean Noise Model
Authors: Pattle Kate , Lai Shih-Ping , Hasegawa Tetsuo , Wang Jia-Wei , Furuya Ray S. , Ward-Thompson Derek , Bastien Pierre , Coudé Simon , Eswaraiah Chakali , Fanciullo Lapo , Francesco James di , Hoang Thiem , Kim Gwanjeong , Kwon Woojin , Lee Chang Won , Liu Sheng-Yuan , Liu Tie , Matsumura Masafumi , Onaka Takashi , Sadavoy Sarah , Soam Archana
Published: July 2019

The dependence of the polarization fraction p on total intensity I in polarized submillimeter emission measurements is typically parameterized as p ∝ I
−α
(α ≤ 1) and used to infer dust grain alignment efficiency in star-forming regions, with an index α = 1 indicating near-total lack of alignment of grains with the magnetic field. In this work, we demonstrate that the non-Gaussian noise characteristics of the polarization fraction may produce apparent measurements of α ∼ 1 even in data with significant signal-to-noise in Stokes Q, U, and I emission, and so with robust measurements of polarization angle. We present a simple model demonstrating this behavior and propose a criterion by which well-characterized measurements of the polarization fraction may be identified. We demonstrate that where our model is applicable, α can be recovered by fitting the p–I relationship with the mean of the Rice distribution without statistical debiasing of the polarization fraction. We apply our model to JCMT BISTRO Survey POL-2 850 μm observations of three clumps in the Ophiuchus molecular cloud, finding that in the externally illuminated Oph A region, α ≈ 0.34, while in the more isolated Oph B and C, despite their differing star formation histories, α ∼ 0.6–0.7. Our results thus suggest that dust grain alignment in dense gas is more strongly influenced by the incident interstellar radiation field than by star formation history. We further find that grains may remain aligned with the magnetic field at significantly higher gas densities than has previously been believed, thus allowing investigation of magnetic field properties within star-forming clumps and cores.
Conjugate vaccines for enteric fever: proceedings of a meeting organized in New Delhi, India in 2009
Authors: Podda Audino , Saul Allan James , Arora Rashmi , Bhutta Zulfiqar , Sinha Anju , Gaind Rajni , Singhal Tanu , Saha Samir , Brooks Abdullah , Martin Laura B. , Amdekar Yeshwant , Chitkara Amar Jeet , Shieh Mae , Kapur Ambujam Nair , Chugh Tulsi Das
Published: July 2019

Enteric fever is responsible for significant morbidity in South Asia and high prevalence of severe disease is seen in children under two years of age. Effective typhoid vaccines are available, but they cannot be used for children under two years of age and also have some limitations in older age groups. Participants supported development of a Salmonella Typhi conjugate vaccine able to induce effective, long-lasting immunity in young children. The role of Salmonella Paratyphi A as a cause of enteric fever was discussed and consensus reached that a bivalent S. Typhi-S. Paratyphi A conjugate vaccine is highly desirable; however, considering disease epidemiology and the advanced status of vaccine development, rapid introduction of monovalent S. Typhi conjugate vaccine into vaccination programs of South Asia was recommended. Prevention should be emphasized, available vaccines used, and efforts toward improving sanitation continued. Success of the new vaccine will depend on several factors, including delivery costs and governmental ability to adopt and implement suitable immunization programs. To ensure good immunization coverage, the conjugate vaccine could be administered either to young infants, concomitantly with infant EPI vaccines, or to older infants, concomitantly with measles vaccine, currently given at 9 to 12 months. The need for new combination vaccines, containing both EPI and typhoid antigens, was discussed as a tool to increase coverage and reduce the number of injections and priority conflicts in a crowded infant vaccination schedule. However, stand-alone enteric fever conjugate vaccines would allow more flexibility to immunize different age groups and therefore should be rapidly developed.
A finding of live Fasciolopsis buski in an ileostomy opening
Authors: Mahajan Rakesh Kumar , Duggal Shalini , Biswas Niraj kumar , Duggal Nandini , Hans Charoo
Published: July 2019

A pair of live Fasciolopsis buski wriggled their way out through the ileostomy opening in a young adult male who had recently migrated to Delhi and had met with a road traffic accident. Finding this parasite in the national capital, a non endemic area for Fasciolopsiasis, prompted us to emphasize the importance of changes in the ecology, human demography, and human behaviour that may provide an environment conducive to their adaptability to the new geographical requirements. Awareness of Fasciolopsiasis, which is endemic in some regions of India, especially in rural settings, is an important issue because early diagnosis is essential. Hence, a surveillance mechanism among the migratory population to institute preventive interventions is necessary.
Some seed properties affecting seed choice by Poecilus cupreus
Authors: Foffová Hana , Saska Pavel , Bohan David
Published: July 2019

Seed predators are an integral part of agrocoenoses where they contribute to the reduction of weed populations. Although they are taking part in biological control of weed seeds, we still do not understand which properties of seeds are responsible for variable attractiveness of different species of seeds to carabids beetles. Seed coat provides a physical barrier and hinders volatiles to be released from the seeds when these are dry. In this work, we focused on seed preferences of Taraxacum officinale and Stellaria media by a ground beetle (Coleoptera: Carabidae) species, Poecilus cupreus, which is known as an omnivorous species. The seeds were used in three different states - dry, imbibed and with crushed seed coat, and from two different origins. The seeds were presented simultaneously in an experimental arena. Seed consumption was assessed after 30 minutes, 24 hours and 48 hours of exposure. There was no statistically significant difference between seeds with different origin. The most preferred seeds were T. officinale with damaged seed coat. The total consumption of these seeds was was 0.1 % after 30 minutes, 13.8 % after 1 day and 71.5 % after 48 hours. The seeds of S. media were consumed less. This indicates that the consumption was enhanced by either an increase of volatile compounds from the damaged seeds that attracted the beetles, or from shorter handling time due to reduced physical barrier of the crushed coat.
Diversity and space-time dynamics of fish assemblages in a coastal lagoon, western Atlantic
Authors: Cattani André Pereira , Ribeiro Gisela Costa , Cardoso Olímpio Rafael , Afonso Maíra Gnoatto , Hostim-Silva Maurício , Pichler Helen Audrey , Spach Henry Louis
Published: July 2019

The knowledge of the temporal and spatial dynamics in the composition of fish fauna makes it possible to identify patterns of occupation of ecosystems, providing a basis for evaluation and preservation of the local biodiversity. Monthly samplings were carried out at seven sites in a coastal lagoon, using a casting net, dip net and beach seine. A total of 4,110 individuals were collected, distributed in 23 families and 49 taxa of fish, with a predominance of Mugilliza, M.curema, Atherinellabrasiliensis, Micropogoniasfurnieri and Eucinostomusargenteus, corresponding to more than 80% total weight of all individuals caught. Regarding seasonality, greater abundances were recorded in fall, influenced by the high abundance of A.brasiliensis in this period. In addition to fall, this species was also abundant in summer. However, this pattern of dominance was different for the families Mugilidae and Gerreidae, with higher abundances in spring and summer, respectively. The highest abundances were found in the southern section of the lagoon, which are related to the high abundance of A.brasiliensis, M.liza and M.curema. In relation to the indices of average taxonomic distinctness and variation in the taxonomic distinctness, no significant differences were detected between the seasons of the year. Thus, the patterns of distribution and occurrence of fish in the lagoon were consistent with the patterns observed in Brazilian coastal lagoons and estuaries, as well as to the coastal shallow areas of the southeastern and southern regions.
Malformation in three anuran species from a preserved remnant of Atlantic Forest in southeastern Brazil
Authors: Mônico Alexander Tamanini , Silva-Soares Thiago , Koch Esteban Diego
Published: July 2019

Records of malformation in amphibians have significantly increased on a global scale. The main causes of malformations are linked to environmental contaminants, and records in preserved environments are uncommon. We reported malformations in three anuran species belonging to three families:Crossodactylustimbuhy(Hylodidae),Proceratophrysschirchi(Odontophrynidae) andThoropamiliaris(Cycloramphidae). All records were found within the Reserva Biológica Augusto Ruschi, a well-preserved protected remnant of Atlantic rainforest located in the mountains of the state of Espírito Santo, southeastern Brazil. The malformations detected were hemimelia (long bone shortened) with ectrodactyly (digit absent) and brachydactyly (digit shortened) inC.timbuhy, microphtalmia (small eye) inP.schirchiand ectrodactyly inT.miliaris. Further studies are recommended to enable a better understanding about the incidence and causes of malformations within preserved areas.
Importancia para la conservación de las aves de un relicto de bosque en la región fitogeográfica del Espinal, Argentina
Authors: Verga Ernesto G. , Sánchez Hümoller Hilda L. , Vergara-Tabares David L. , Galetto Leonardo , Peluc Susana I.
Published: July 2019

La región fitogeográfica del Espinal en Argentina está críticamente amenazada, ya que gran parte de su territorio históricamente cubierto por bosque fue convertido a cultivos. Con el fin de evidenciar el valor de conservación de bosques relictuales en la región, realizamos un inventario de las especies de aves presentes en uno de los relictos de Espinal más grandes del centro de la provincia de Córdoba, evaluando si cumple con las condiciones para formar parte de la red de Áreas de Importancia para la Conservación de las Aves (AICAs). Registramos 116 especies, pertenecientes a 32 familias, lo cual representa aproximadamente un cuarto del total de especies citadas para la provincia. La ocurrencia de una “especie amenazada a nivel mundial” (Rheaamericana), dos “especies de distribución restringida a nivel nacional” (Poospizaornata y Xolmisrubetra), y 18 especies “específicas de un bioma” hace que este relicto de Espinal cumpla al menos con tres de los criterios para considerar un área como AICA. Este trabajo resalta el gran valor del sitio estudiado para la conservación de las aves, constituyendo un reservorio regional de diversidad. En base a estos resultados y a la crítica situación de conservación que enfrenta el Espinal, consideramos que es imprescindible revalorizar el área como un AICA.
Evaluation of the current status of the value-added pharmacy services and pharmacists’ attitude in Bulgaria
Authors: Balkanski Stefan , Simeonova Joana , Gitev Ivan , Getov Ilko
Published: July 2019

Value-added pharmacy services (VAPS) are additional services to the traditional pharmacy activities, which do not include dispensing of medicinal products and professional consultation. Over 51% of the community pharmacies in Bulgaria offer VAPS but mainly measuring of blood pressure (67.4%) and blood glucose (12.9%). About 60% of community pharmacists in the country are willing to perform other VAPS. About 70% of them believe that patients would rate VAPS as useful. Younger pharmacists with professional experience less than 5 years (90.9%) tend to believe that VAPS would be positively rated by their patients. The study shows that VAPS different from consultation and dispensing of medicinal products have a potential for development in the community pharmacies in Bulgaria.
Clematis guniuensis (Ranunculaceae), a new species from Eastern China
Authors: Wang Rong-Bin , Ni Wei-Yong , Xu Wen-Jing , Gui Zheng-Wen , Zhou Shou-Biao
Published: July 2019

Clematisguniuensissp. nov., a new narrowly endemic species of Clematis, is described and illustrated from the Huangshan Mountains of Eastern China. A description of C.guniuensis is presented along with illustrations, photographs and diagnostic differences between the new species and its putative close allies.
A new species of Rhaptopetalum (Lecythidaceae) from south-western Gabon
Authors: Kenfack David , Nguema Diosdado Ekomo
Published: July 2019

Rhaptopetalumrabiense Kenfack & Nguema, sp. nov. from the Rabi forest in south-western Gabon is described, illustrated and assigned a provisional conservation status of “Critically Endangered”. An identification key to the five Gabonese species of Rhaptopetalum is also provided.
A new variety of Didymocarpus (Gesneriaceae) from Guangdong, China
Authors: Xu Wen-Jing , Qin Wei-Hua , Wang Zi-Qi , Li Zhong-Lin , Fu Long-Fei , Hong Xin
Published: July 2019

A new variety of Didymocarpus, D.heucherifoliusvar.gamosepalus from Guangdong, China, is described and illustrated with photographs. It closely resembles the more widespread D.heucherifolius within a number of morphological characters. However, it can be easily distinguished from the latter according to the new taxon: calyx base connate, 5-lobed from middle to above middle, larger flowers (up to 5 cm long) and glabrous corolla.
The genus Eunotia Ehrenb. (Bacillariophyta) in the Cheremsky Nature Reserve, Ukrainian Polissya, and refined terminology relevant to the raphe system morphology
Authors: Bukhtiyarova Lyudmila N.
Published: July 2019

Numerous species ofEunotiaEhrenb., widely distributed in the world flora, prefer acidic, dystrophic or oligotrophic freshwater habitats with low conductivity and usually occur in epiphytic or epilithic hydrotopes. In Ukraine, only 32 species and eight varieties ofEunotiawere known until this study. For the first time, 9 more species have been recorded mainly from the Cheremsky Nature Reserve, located in Ukrainian Polissya. New findings include 2 species widely distributed in the world flora on most continents and 7 rare species known from several locations, among themE.genuflexa,E.jarensisandE.ruzickae, which are probably European endemics as they have not been reported from other continents. For the present time in the Cheremsky Nature Reserve, the 20 species recorded here, the highest species richness ofEunotiain Ukraine, bring the total number ofEunotiain Ukraine to 41 species, which comprises only 7% ofEunotiaspecies in the world flora. This is indirect evidence of insufficient investigation of the wetlands in Ukraine whereEunotiausually is represented with high species richness. Several definitions are suggested to describe morphological features that are peculiar to the diatom frustule particular to theEunotiaspecies. The genus Eunotia possesses a mirror-symmetric,mantle-offset,brevisslit raphe system, which may or may not haveterminal raphe fissures. Morphological analysis provided in this study revealed the absence of terminal raphe fissures for many species ofEunotia. Instead, the distal ends of the raphe slits finish on the outer valve surface by funnel holes, sometimes pore-like ones, connected with the helictoglossae. However, in the literature those distal ends of the raphe slits were described erroneously as terminal raphe fissures. For the first time different types of raphe system are grounded. Two speciesEunotiaimplicataNörpel-Schempp et al. in Alles et al. andEunotiaincisaW. Smith ex Gregory were lectotypified.
Physico-chemical properties and fatty acid composition of Chrozophora tinctoria seeds as a new oil source
Authors: Hazrati S. , Nicola S. , Khurizadeh S. , Alirezalu A. , Mohammadi H.
Published: July 2019

Chrozophora tinctoria L., usually known as dyer’s Croton, Turnsole or Giradol, has been used in various medicinal and food products for many years. However, no comprehensive research has been undertaken to assess its potential as a new seed oil crop. Therefore, the current study examined the fatty acid composition, physico-chemical properties and antioxidant activity of C. tinctoria seeds, grown in the southwest of Iran. The seed oil content was found to be 26.40%. The extracted oil was analyzed for fatty acid composition using gas chromatography (GC). The results showed that unsaturated fatty acids accounted for almost 91% of the total fatty acids. Linoleic acid was the dominant fatty acid (76.68%), followed by oleic acid (13.99%) and palmitic acid (5.32%). δ-tocopherol was the major tocopherol in the oil, representing 70 mg/100 g oil. The total phenolic content (151.70 mg GAE per 100 g oil) and total flavonoid content (1.17 mg QE oil) were also determined in the extracted oil. The antioxidant activity was measured by a DPPH assay and expressed as 45% of the seed oil. Due to its high oil yield and high unsaturated fatty acid content, C. tinctoria could be regarded as a new source of edible oil.
Investigations of In Vitro Corrosion, and Wear Properties of TiN PVD Coating on Ti6Al4V Alloy for Dental Application
Authors: Hussein Mohamed , Adesina Akeem , Kumar Madhan , Sorour Ahmad A. , Al Aqeeli Nasser
Published: July 2019

Ti alloys have been widely used for biomedical applications.The generated wear debris due to its low wear resistance lead to inflammations and reduce the lifetime of the implant. So, the coating has been used to improve corrosion and wear resistance. In the present work, we report the assessments of TiN coating deposited by CA-PVD on Ti6Al4V alloy for dental applications. The deposited coating was characterized by XRD and SEM. Mechanical properties were assessed using micorindentation. The in vitro corrosion properties was investigated using PDP and EIS in artificial saliva. The wear rate was characterized using the linear reciprocating tribometer. The results showed that a TiN layer with 1.8 µm thickness was deposited with a hardness of 24.9±8.123 GPa and a Modulus of elasticity of 244.7±14.8 GPa. The corrosion study revealed enhancement in the corrosion performance of the coated sample in artificial saliva. The wear rate of the coated samples was also enhanced for the coated sample. The improved surface hardness, corrosion and wear characteristics of the TiN coating suggests that TiN coating would be a potential candidate for dental applications.
Influence of Building Parameters on Surface Aspect and Roughness in Additive Manufactured Metal Parts
Authors: Caiazzo Fabrizia , Alfieri Vittorio , Aliberti Maria Virginia , Argenio Paolo
Published: July 2019

Additive Manufacturing by means of laser irradiation of powder bed is receiving increasing interest in many industrial fields thanks to a number of benefits including the opportunity of producing complex, accurate components with optimized physical and mechanical features. Depending on the application, specific surface properties in terms of texture and roughness are required. Therefore, this paper is aimed to investigating the effects of the building parameters and the exposure strategies on the resulting surface aspect and roughness. Indeed, different patterns are expected on the exposed surface as a consequence of the values of laser operating power, scanning speed and hatch spacing. The results in terms of roughness and surface geometry are discussed with reference to current standards. Suggestions are provided to guide the reader in selecting the proper processing conditions based on the expected surface features.
Influence of Cold Spray Nozzle Displacement Strategy on Microstructure and Mechanical Properties of Cu/SiC Composites Coating
Authors: Matts Olga , Hammoud Hussein , Sova Alexey , Bensaid Zineb , Kermouche Guillaume , Klöcker Helmut , Bosch Cédric , Texier-Mandoki Nathalie
Published: July 2019

In this work an influence of cold spray nozzle displacement parameters on the properties of copper-silicon carbide cold spray deposits is considered. In particular the influence of nozzle traverse speed and distance between deposited tracks on the coating porosity and behavior during compressive tests was analyzed. It was shown that cold spraying at low nozzle traverse speed leads to formation of thick tracks with quasi-triangular cross-section. As a consequence, the particle impact angle on the sides of spraying track increases that. Thus, the particle deformation at impact on the track periphery becomes insufficient and local porosity value rises. Increase of nozzle traverse speed allows increasing coating density and mechanical properties due to amelioration of particle deformation conditions. Compressive tests revealed significant anisotropy of mechanical properties of copper-silicon carbide cold spray deposits. In particular, compressive strength measured in vertical direction (perpendicular to the substrate) was significantly higher than one measured in horizontal plane (parallel to substrate). This anisotropy could be explained by the orientation of particle deformation pattern during impact.
Enhancement in Fatigue Life of Ti-13Nb-13Zr Alloy through Ultrasonic Shot Peening
Authors: Kumar Pramod , Mahobia Girija Shankar , Chattopadhyay Kausik
Published: July 2019

β-Ti (Ti–13Nb–13Zr) alloy was subjected to ultrasonic shotpeening (USSP) and a nanocrystalline layer of ~60 µm thickness was developed on the metastable Ti-13-Nb-13Zr alloy. In this investigation, the surface hardening and low cycle fatigue (LCF) behavior of the alloy were studied after USSP treatment. Compared to the un-shotpeened samples, the shotpeened specimens exhibit high surface hardness and an enhancement in fatigue life. A notable impact of USSP on the fatigue crack initiation and growth of the alloy was also observed. The results show that the crack initiation at free-surface was suppressed due to the formation of a nanograined microstructure and fatigue crack initiation site shifts from surface to inside of the material. Further, the microstructural analysis proves that the nanograin formation and compressive stresses imparted by ultrasonic shot peening treatment are helpful in significant improvement of fatigue life.
Mechanical and Corrosion Behavior of TiN Coatings Deposited on Nitrided AISI 420 Stainless Steel
Authors: Dalibon Eugenia Laura , Cabo Amado , Halabi Jorge , Moreira Ramiro D. , Silva Kevin , Brühl Sonia P.
Published: July 2019

TiN coatings are widely used in different applications for extending the lifetime of components due to their high hardness and good wear resistance. However, it is not convenient to deposit them on soft stainless steels. In this work, the wear and corrosion behavior of commercial TiN coatings deposited by Arc-PVD on nitrided and non-nitrided martensitic stainless steel was studied. Two different nitriding conditions were used, one at high temperature (HTN) and the other at low temperature (LTN). Nanohardness and microhardness were measured. The microstructure was characterized by OM, SEM, XRD and XPS. Pin on disk and erosion tests were carried out in order to evaluate their wear resistance. The corrosion behavior was analyzed in salt spray fog and electrochemical tests in NaCl solution and the adhesion was measured in Scratch and Rockwell C Indentation tests.The coating thickness was about 1.5 µm and its hardness of 34 GPa. The nitrided layers were 13 µm and 17 µm thick for LTN and HTN, the hardness was approximately 12 GPa for both nitrided samples. The nitrided layer improved TiN coating adhesion in the Scratch tests. The wear loss volume was similar for both duplex and only coated samples in pin on disk tests. Nevertheless, wear resistance was not good for the LTN or HTN + TiN coating system in the erosion tests. Regarding corrosion behavior, the coatings showed poor corrosion resistance and this could be related to the presence of porous defects, which allow the solution to reach and attack the substrate, thus producing coating detachment around the pits.
Residual Stresses in Similar and Dissimilar Friction Stir Welds of AA5083 and AA6061
Authors: Svoboda Hernán Gabriel , Tufaro Leonardo Nicolás , Varela Francisco Javier Belzunce
Published: July 2019

Similar and dissimilar friction stir welds of AA5083 and AA6061 were produced modifying the location of the materials in the joint (advancing or retreating side) and travel speed (73 and 206 mm/min). Longitudinal and transverse residual stresses were evaluated by X-ray diffraction technique on the mid-length of each welded sample, in the transverse direction to the weld on a 42 mm distance. Unstrained lattice spacing (d0) and full width at half maximum (FWHM) were also measured. A peak of tension stress at the edge of stirred zone was detected, describing an “M” like profile, which were more asymmetrical for dissimilar joints. Variations in d0 and FWHM were also observed through the welded joint, which were related to microestructural changes.
In-Process Laser Re-Melting of Thin Walled Parts to Improve Surface Quality after Laser Metal Deposition
Authors: Bruzzo Francesco , Catalano Guendalina , Demir Ali Gökhan , Previtali Barbara
Published: July 2019

Laser metal deposition (LMD) is an additive manufacturing process highly adaptable to medium to large sized components with bulky structures as well as thin walls. Low surface quality of as-deposited LMD manufactured components with average roughness values (Ra) around 15-20μm is one of the main drawbacks that prevent the use of the part without the implementation of costly and time-consuming post-processes. In this work laser re-melting is applied right after LMD process with the use of the same equipment used for the deposition to treat AISI 316L thin walled parts. The surface quality improvement is assessed through the measurement of both areal surface roughness Sa(0.8mm) QUOTE and waviness Wa QUOTE (0.8mm) parameters. Moreover, roughness power spectrum is used to point out the presence of principal periodical components both in the as-deposited and in the re-melted surfaces. Then, the transfer function is calculated to better understand the effects of laser re-melting on the topography evolution, measuring the changes of individual components contributing to the surface roughness such as the layering technique and the presence of sintered particles. Experiments showed that while low energy density inputs are not capable to properly modify the additive surface topography, excessive energy inputs impose a strong periodical component with wavelength equal to the laser scan spacing and directionality determined by the used strategy. When a proper amount of energy density input is used, laser re-melting is capable to generate smooth isotropic topographies without visible periodical surface structures.
Multifunctional Bioceramic Composite Coatings Deposited by Cold Spray
Authors: Judd Kiran G. , Sharma Mala M. , Eden Timothy J.
Published: July 2019

Bioactive coatings have predominately been explored through plasma spray; but this technique has associated heat and melting of the feedstock materials thereby degrading the novel bioactive properties of hydroxyapatite (HA), as well as deteriorating the adhesion of the coating to the implant. The current study discusses a novel approach to producing biocompatible coatings that have been deposited at temperatures well below their melting point. The cold spray process was used to deposit 100 wt.% titanium (Ti) and composite powders with 80 wt% titanium (Ti) and 20 wt% hydroxyapatite (HA) onto Al6061, 316SS and Ti-6Al-4V substrates with the aim of achieving well-bonded homogeneous coatings; the effect of process parameters and substrate material was investigated. Preliminary results indicate the phase composition of the HA remained the same before and after synthesis of coating. Dense composite coatings were obtained with thicker coatings yielding the least amount of total porosity.
Experimental Investigations on Tire/Road Friction Dependence from Thermal Conditions Carried out with Real Tread Compounds in Sliding Contact with Asphalt Specimens
Authors: Arricale Vincenzo Maria , Carputo Francesco , Farroni Flavio , Sakhnevych Aleksandr , Timpone Francesco
Published: July 2019

The understanding of tire’s adherence with a rough surface is a common goal for several fields in the automotive sector. In fact, grip is synonym of safety and performance, playing a decisive role for braking distance and vehicle stability, fuel consumption, wear rate [1], noise generation and for the vehicle dynamics control system (e.g. ABS, TCS, AYC and other) [2]. This paper deals with tire tread grip experimental investigation and evaluation under different conditions that influence it during the sliding contact [3]. In this regard the test campaign involves the use of different tire compounds (in terms of viscoelastic characteristics), tested in several conditions: different contact pressure, sliding speed, temperature, sliding contact length and road surface. The test bench employed by the UniNa Vehicle Dynamic Research Group is an upgrade of the British Pendulum, an instrument for outdoor tribological tests on road sections. The principal sensors installed on the test bench are an encoder, for the evaluation of the sliding speed of the tire specimen, and a load cell, for the measurement of the force arising at tire/road interface in the longitudinal and vertical directions [4]. In fact, the grip shall be determined as the ratio of the longitudinal force and corresponding load on the tire. The paper's aim is the description of the experimental campaign after an accurate introduction on the test setup and an illustration of the equipment. Finally, the preliminary results and the methodologies used to process the acquired data are described.
AFM Measurements of the Deformation Kinetics of Silica Oxide Dots Deposited on a Sequentially Nitrided Stainless Steel
Authors: Laourine Feriel , Cleymand Franck , Marcos Grégory , Guilet Stéphane , Czerwiec Thierry
Published: July 2019

In this paper, we present the results of plasma nitriding treatments on austenitic stainless steel substrates previously coated with a patterned silicon oxide layer. For this purpose, masks were made by PECVD for the deposition of a silicon oxide layer on polished austenitic AISI 316L samples. For the final nitriding treatment, we used a multi-dipolar plasma providing independent substrate polarization. The interactions between expanded austenite and fixed silicon oxide mask in different shapes (circular and square dots) are observed by atomic force microscopy (AFM) on the same area before and after the nitriding treatment. After this thermochemical treatment, we obtain strong distortions of the dots, in particular at the edges of the larger size dots. The role of elastic deformation, due to the expanded austenitic phase formed by the diffusion of nitrogen under the mask is of primary importance.
Cold Wall CVD Graphene-Based Transparent Electrode for Solar Cells
Authors: Cirillo Claudia , Spina Domenico , Mercaldo Lucia V. , Delli Veneri Paola , Sarno Maria
Published: July 2019

In this paper, we report on synthesis of graphene film on Cu foil by cold wall CVD and successfully transferred to a photovoltaic cell. The obtained sample was covered with an ultra-thin layer of Ni, of about 4 nm, using a sputtering technique. The optical and electrical properties of graphene/Ni-based films showed superior performance (transmittance =65%, sheet resistance=250 Ω/sq; EQE=40%) compared to films made of ITO/nickel, described in literature, of greater thickness.
Stationary Shoulder Friction Stir Processing: Influence of Tool Wear on Surface Properties
Authors: Impero Filomena , Scherillo Fabio , Silvestri Alessia Teresa , Casarin Renzo , Astarita Antonello , Squillace Antonino
Published: July 2019

In the present study, the influence of stationary shoulder friction stir processing (SSFSP) tool wear on the processed surface was investigated. SSFSP is a solid-state process that uses a rotating tool plunged in the material to promote microstructure modification, mainly grain refinement, on the workpiece without melting the material itself. It differs from conventional Friction Stir Processing (FSP) since in the SSFSP the tool shoulder does not rotate and simply slides on the surface. The workpiece processed with SSFSP shows a smoother surface without shoulder marks, and with smaller flash than conventional FSP. The tool wear could slightly change the profile of the shoulder and affects process soundness. SSFSP testing made up of 2880 experiments, each one with a path length of 50 mm, was realized on AA 6082 T6 sheets with 3.0 mm thickness using 1500 rpm tool rotation speed and 300 mm/min welding speed. Optical and confocal microscopy analysis and Vickers micro hardness measurements allowed putting in evidence the characteristics of the processed surfaces and their modifications as a function of tool wear.
Nanocrystallisation of Nickel Free High Nitrogen Austenitic Stainless Steel through Ultrasonic Shot Peening
Authors: Mahobia Girija Shankar , Kumar Chandra Shekhar , Chattopadhyay Kausik
Published: July 2019

Ultrasonic Shot Peening (USP) - a novel route of surface modification was employed on biomedical grade Nickel free high nitrogen stainless steel (18Cr-21Mn-0.65N-balance Fe) to obtain a surface nanostructure without changing its chemical composition and microstructural phase transformation. Hardened steel shots of diameter 2 mm and 3mm were repeatedly impacted on the specimen surface at a constant frequency of 20KHz for 2 and 8 minutes duration. Coarse surface grains of size 36±6µm transformed into nanocrystalline grains of size 13-18 nm. The deformed layer resulted by USP treatment increased with increase in shot diameter and duration of USP. The microstructure was characterized by using optical microscope, SEM, XRD and TEM technique. The hardness and roughness of the treated surface was also found to be strongly dependent on the USP process parameters.