bluuebunny/crossref_metadata_2025 huggingface dataset:
Propagação de Ondas Eletromagnéticas através de um Sistema Multicamadas Aleatórias
Authors: De Jesus Antonio Delson C. , Coutinho Waldeck Sotero
Published: May 2020

Neste trabalho estudamos a resposta de um sistema de multicamadas aleatórias constituído de camadas homogêneas, a um campo eletromagnético no modo TE (Transversal Elétrico) limitando-se a incidência normal. Verificamos que a transmissão das ondas se dá de forma periódica de modo que existem bandas de modos transmissíveis com relação ao número de onda. Daí, isolamos um único espectro de ondas e verificamos a influência da quantidade de camadas e da largura de desordem na resposta do sistema. Os resultados mostraram que no limite de grandes quantidades de camadas a média espectral da banda transmissível varia com uma lei de potência. A largura de desordem da média espectral decresce exponencialmente.
Como medir o envelhecimento biológico - Parte 1
Authors: De Medeiros N.G.F.
Published: May 2020

Neste artigo faremos uma rápida apresentação do estudo do fenômeno de envelhecimento biológico, com ênfase no envelhecimento humano, mostrando como é possível quanticá-lo. Mostramos que uma das formas mais eficientes de detecção do envelhecimento em populações é por meio da análise das taxas de mortalidade, obtidas a partir de tabelas atuariais. Estastabelas apontam para a existência de uma lei de mortalidade, responsável por padrões específicos de mortalidade, em populações nas quais se observa o envelhecimento.
Comparative study of cost-effective coherent and direct detection schemes for 100  Gb/s/λ PON
Authors: Zhu Yixiao , Yi Lilin , Yang Bo , Huang Xingang , Wey Jun Shan , Ma Zhuang , Hu Weisheng
Published: May 2020

As the capacity of the next-generation passive optical network (PON) is
reaching 100 Gb/s and beyond, cost-effective transceivers have been
widely discussed. In this work, we provide a comprehensive comparison
of various simplified coherent and direct detection (DD) schemes
operating at a

100

G
b

/

s

/

λ

4-ary pulse amplitude modulation
signal through numerical simulation. According to the cost, the
coherent receivers can be divided into three levels: intensity-only
coherent receivers and phase-insensitive and phase-sensitive
complex-value coherent receivers. The received power sensitivity at
back-to-back, influence of laser frequency offset, local oscillator
power, laser linewidth, analog-to-digital convertor resolution, fiber
dispersion, and hardware complexity are investigated and analyzed for
each transceiver structure. The results show the following:
(1) Transmitter-side optical amplification is suggested for DD and
intensity-only coherent receivers to meet the 29 dB power budget
requirement, and these schemes have a large dispersion penalty.
(2) Compared with

3

×

3

coupler and

2

×

4

hybrid-based coherent receivers,

2

×

2

coupler and balanced-photodiode-based
heterodyne detection exhibit similar performance with a simpler
structure. (3) Both phase-insensitive and phase-sensitive
complex-value coherent receivers have superior power budget and
dispersion tolerance, and their application in PON would depend on the
cost.
Photon energy-dependent timing jitter and spectrum resolution research based on time-resolved SNSPDs
Authors: Zhang Hengbin , Liu Junku , Guo Jianghua , Xiao Lin , Xie Jun
Published: May 2020

Superconducting nanowire-based single-photon detectors (SNSPDs) are promising devices, especially with unrivalled timing jitter ability. However, the intrinsic physical mechanism and the ultimate limit of the timing jitter are still unknown. Here, we investigated the timing jitter of the SNSPD response to different excitation wavelengths from visible to near-infrared (NIR) as a function of the relative bias currents and the substrate temperature. We established a physical model based on a 1D electrothermal model to describe the hotspot evolution and thermal diffusion process after a single photon irradiated the nanowire. The simulations are in good agreement with the experimental results and reveal the other influencing factors and potential ways to further improve the timing jitter of SNSPDs. Finally, we introduce a new time-resolved approach, where by collecting the instrument response function (IRF) of SNSPDs, the wavelength of the incident photons can be easily discriminated with a resolution below 80 nm.
Integrating remote reflector and air cavity into inclined sidewalls to enhance the light extraction efficiency for AlGaN-based DUV LEDs
Authors: Zhang Ji , Chang Le , Zheng Yuxin , Chu Chunshuang , Tian Kangkai , Fan Chao , Zhang Yonghui , Zhang Zi-Hui
Published: May 2020

In this work, we propose and demonstrate the concept of remote reflections, which help to multiply the photon propagations for increasing the light extraction efficiency (LEE) for both transverse magnetic (TM)- and transverse electric (TE)-polarized light. The remote reflection is enabled by using a remote-metal-reflector-based air cavity extractor. According to our study, the remote reflections can significantly avoid the optical absorption when compared with the conventional inclined-sidewall-shaped deep-ultraviolet light-emitting diodes with the metal Al reflector on the inclined sidewalls. As a result, the optical power for our proposed devices has been significantly enhanced by 55% experimentally. Numerical simulations further reveal that the remote metal reflector not only favors more total internal refection on the inclined sidewalls but also supports additional light escaped channels for enhancing the LEE.
Digital power division multiplexed DD-OFDM using fundamental mode transmission in few-mode fiber
Authors: Swain Smaranika , Bhashyam Srikrishna , Koilpillai Ravinder D. , Venkitesh Deepa
Published: May 2020

We experimentally demonstrate fundamental mode transmission of digital power division multiplexed direct detection - orthogonal frequency division multiplexed (DD-OFDM) signal at 25.3 Gbps in 6.5 GHz bandwidth through a 5.3 km few-mode fiber. We compare the performance of a two-channel digital power division multiplexed (DPDM) signal with DD-OFDM of higher modulation format with the same spectral efficiency in both linear and nonlinear regimes of operation. In the linear regime, the mean bit error rate performance of the two-channel DPDM signal performance is comparable to the DD-OFDM signal with higher-order modulation. In the nonlinear regime, both the constituent signals of the DPDM scheme have similar nonlinear thresholds compared to the DD-OFDM signal with higher-order modulation. DPDM transmission with DD-OFDM over few-mode fiber offers doubling of both split ratio and spectral efficiency over single-mode fibers when used for passive optical networks.
Improving system performance by using adaptive optics and aperture averaging for laser communications in oceanic turbulence
Authors: Toselli Italo , Gladysz Szymon
Published: May 2020

We theoretically investigate the effectiveness of adaptive optics correction for Gaussian beams affected by oceanic turbulence. Action of an idealized adaptive optics system is modeled as a perfect removal of a certain number of Zernike modes from the aberrated wavefront. We focused on direct detection systems and we used the aperture-averaged scintillation as the main metric to evaluate optical system performances. We found that, similar to laser beam propagation in atmospheric turbulence, adaptive optics is very effective in improving the performance of laser communication links if an optimum aperture size is used. For the specific cases we analyzed in this study, scintillation was reduced by a factor of ∼7 when 15 modes were removed and when the aperture size of the transceiver was large enough to capture 4-5 speckles of the oceanic turbulence-affected beam.
In vivo time-domain diffuse correlation spectroscopy above the water absorption peak
Authors: Colombo L. , Pagliazzi M. , Konugolu Venkata Sekar S. , Contini D. , Durduran T. , Pifferi A.
Published: May 2020

Time-domain diffuse correlation spectroscopy (TD-DCS) is a newly
emerging optical technique that exploits pulsed, yet coherent light to
non-invasively resolve the blood flow in depth. In this work, we have
explored TD-DCS at longer wavelengths compared to those previously
used in literature (i.e., 750–850 nm). The measurements were performed
using a custom-made titanium-sapphire mode-locked laser, operating at
1000 nm, and an InGaAs photomultiplier as a detector. Tissue-mimicking
phantoms and in vivo measurements during
arterial arm cuff occlusion in

n

=

4

adult volunteers were performed to
demonstrate the proof of concept. We obtained a good signal-to-noise
ratio, following the hemodynamics continuously with a relatively fast
(1 Hz) sampling rate. In all the experiments, the auto-correlation
functions show a decay rate approximately five-fold slower compared to
shorter wavelengths. This work demonstrates the feasibility of in vivo TD-DCS in this spectral region and its
potentiality for biomedical applications.
400-Gb/s direct modulation using a DFB+R laser
Authors: Che Di , Matsui Yasuhiro , Chen Xi , Schatz Richard , Iannone Patrick
Published: May 2020

We demonstrate a direct-modulation and direct-detection system with a back-to-back line rate of 411.6 (net bit rate of 337.5) Gb/s using a 65 GHz DFB+R laser. The O-band laser with a chirp parameter of 0.6 supports dispersion-tolerant transmissions up to 15 km without an optical amplifier.
High spectro-temporal purity single-photons from silicon micro-racetrack resonators using a dual-pulse configuration
Authors: Burridge Ben M. , Faruque Imad I. , Rarity John G. , Barreto Jorge
Published: May 2020

Single-photons with high spectro-temporal purity are an essential resource for quantum photonic technologies. The highest reported purity up until now from a conventional silicon photonic device is 92% without any spectral filtering. We have experimentally generated and observed single-photons with

98.0
±
0.3
%

spectro-temporal purity, an upper bound of the stimulated emission tomography, using a conventional micro-racetrack resonator and an engineered dual pump pulse.
Dynamic voxel size tuning for direct laser writing
Authors: Tičkūnas Titas , Paipulas Domas , Purlys Vytautas
Published: May 2020

We present a straightforward method to dynamically tune the voxel size in the multiphoton polymerization technique by changing the incident laser beam diameter with a motorized beam expander. In such a manner, the beam underfilling of the objective aperture leads to an effective numerical aperture drop. Therefore, the voxel could be expanded in the lateral and the axial directions without changing the objective. Here, we present the theoretical simulation analysis of the light intensity distribution for different underfilling conditions, as well as the measured experimental results of the voxel feature sizes for high numerical aperture objective. The presented approach extends technology capabilities and could significantly increase the fabrication speed while maintaining the possibility for obtaining the highest resolution features.
Painting Beyond Itself: The Medium in the Post-Medium Condition, Isabella Graw and Ewa Lajer-Burcharth (eds) (2016)
Authors: Green Alison
Published: May 2020

Review of: Painting Beyond Itself: The Medium in the Post-Medium Condition, Isabella Graw and Ewa Lajer-Burcharth (eds) (2016)

Berlin: Sternberg Press, 292 pp.,

ISBN 978-3-95679-007-2, p/bk, £13.95
COVID-19 diagnostic multiplicity and its role in community surveillance and control
Authors: Deshmukh Vishwajit , Tripathi Satyendra , Patil Ashlesh , Tripathy Jaya Prasad
Published: May 2020

Diagnosis of persons exposed to/infected with severe acute respiratory syndrome-related coronavirus-2 (SARS-CoV-2) is central to controlling the global pandemic of COVID-19. Currently, several diagnostic modalities are available for COVID-19, each with its own pros and cons. Although there is a global consensus to increase the testing capacity, it is also essential to prudently utilize these tests to control the pandemic. In this paper, we have reviewed the current array of diagnostics for SARSCoV-2 highlighted the gaps in current diagnostic modalities and their role in community surveillance and control of the pandemic. The different modalities of COVID-19 diagnosis discussed are: clinical and radiological, molecular-based (laboratory-based and point-of-care), Immunoassay based (ELISA, rapid antigen and antibody detection tests) and digital diagnostics (artificial intelligence-based algorithms). The role of rapid antigen/antibody detection tests in community surveillance has also been described here. These tests can be used to identify asymptomatic persons exposed to the virus and in community-based seroprevalence surveys to assess the epidemiology of spread of the virus. However, there are few concerns about the accuracy of these tests which needs to evaluated beforehand.
Liraglutide-Induced Hemorrhagic Pancreatitis in a Nondiabetic Patient
Authors: Dolan Russell D. , Bazarbashi Ahmad Najdat , Lo Amy , Smith Benjamin N.
Published: May 2020

Liraglutide is a glucagon-like peptide 1 (GLP-1) analog with a primary effect of increased glucose-dependent insulin secretion and decreased gastric emptying. It serves as a feasible medical weight loss option because of the drug's effect of invoking satiety and lowering caloric intake. Despite emerging efficacy, the GLP-1 class has been associated with severe, although rare, adverse events, including pancreatitis. Previous investigations demonstrated the greatest association between GLP-1 agonist-associated pancreatitis in diabetic populations; however, liraglutide dosing is higher in weight loss formulations, placing the weight loss population at higher risk. We present a case of liraglutide-induced acute pancreatitis in a patient without diabetes.
Movilidad y encierro “Sur-Sur”: reflexiones sobre la práctica de performance participativa como investigación en la penitenciaria femenina de Santiago, Chile
Authors: Ashford Hart Sarah
Published: May 2020

En este ensayo, reflexiono sobre un proyecto de práctica-artística-como-investigación que llevé a cabo en Santiago de Chile. Junto a artistas locales, realizamos talleres con mujeres migrantes, encarceladas, de Colombia, Perú, y Bolivia. El enfoque fue el desarrollo colaborativo de una metodología para facilitar la performance participativa. Más allá de la narrativa representacional, logramos crear un ‘espacio de afecto’ potenciando así las redes del cuidado. Esta intervención creativa en las condiciones carcelarias de aislamiento y deshumanización nos permitió sentir agudamente como la autoexpresión de experiencias de movilidad y encierro puede afirmar la humanidad como condición inalienable de interdependencia. Con el presente ensayo, planteo un acercamiento, adaptable y reflexivo, a la performance participativa en contextos de la encarcelación de migrantes, tanto en Chile como otros lugares. Como parte de mi praxis de hacer-pensando, posiciono mi voz en diálogo con las perspectivas de mis colaboradoras, reconociendo a las participantes como creadoras de conocimiento. Abordo el marco teórico y el proceso de desarrollar una metodología de manera conjunta, indagando en los desafíos que enfrentamos y las nuevas preguntas emergentes.
Pengaruh Kondisi Fisik Sumur dan Penurunan Kualitas Air (BOD) terhadap Kejadian Penyakit (Studi Kasus IndustrixSoun di DesaxManjung Kecamatan Ngawen Kabupaten Klaten)
Authors: Rachmawati Hera
Published: May 2020

ABSTRAKLatar Belakang: Desa Manjung adalah sentral industri soun di Kabupaten Klaten. Industri soun menghasilkan limbah cair yang memiliki kadar BOD di atas baku mutu yaitu sebanyak 1.290 mg/L. Tingginya kadar BOD dalam air menandakan tingginya kandungan mikroorganisme. Kelompok coliform, Escherichia coli, Streptococcus, dan Staphylococcus terkandung di dalam BOD dapat menyebabkan terjadinya gangguan pencernaan dan iritasi kulit. Hal tersebut mungkin dapat menyebabkan terjadinya gangguan pencernaan dan iritasi kulit di Desa Manjung. Tujuan x.penelitian, untuk mengetahui x.hubungan x.kondisi fisik sumur dan penurunan kualitas x.air (BOD) dengan x.kejadian gangguan kesehatan yang dialami warga Desa Manjung.Metode: Penelitian.observasional analitik denganxpendekatan case control. Sampel sebanyak 38 responden (19 kelompok kasus dan 19 kelompok kontrol) dengan purposive sampling. Analisis data dengan uji Chi-square.Hasil: Hasil uji laboratorium kadar BOD terdapat 5 sampel air sumur atau sebesar 13,15% yang memiliki baku mutu air badan air kelas I dari 38 sampel air sumur. Hasil uji hubungan menunjukkan bahwa kondisi dinding sumur (p-value = 0,032; OR = 7,650(1,370-42,713)), kondisi lantai sumur (p-value = 0,040; OR = 5,926(1,287-27,283)), dan kadar BOD dalam sampel air sumur (p-value = 0,046) berhubungan dengan kejadian penyakit. Kondisi bibir sumur (p-value = 0,065; OR = 6,182(1,101-34,700)) tidak berhubungan dengan kejadian penyakit.Simpulan: Kesimpulan dari penelitian ini adalah gangguan kesehatan yang terjadi berhubungan dengan kondisi dinding sumur, kondisi lantai sumur, dan kadar BOD dalam sampel air sumur.
Hubungan Kadar Timbal (Pb) dengan Kadar Malondialdehid (MDA) dalam Darah pada Ibu Hamil di Wilayah Pantai Kabupaten Brebes
Authors: Ismanto Hari
Published: May 2020

ABSTRAKLatar Belakang : Kematian ibu di Jawa Tengah tertinggi ditemukan di Kabupaten Brebes dengan jumlah kasus sebesar 54 kasus pada 2016 dan 52 kasus pada 2015. Paparan timbal dimungkinkan menjadi penyebabnya. Penelitian ini dilakukan di 4 wilayah pesisir Kecamatan di Brebes. Tujuan dari penelitian ini adalah untuk menentukan hubungan antara kadar timbal (Pb) dengan kadar malondialdehyde (MDA) dalam darah ibu hamil.Metode : Penelitian ini merupakan jenis penelitian observasional analitik dengan desain Cross Sectional. Sampel adalah ibu hamil yang berjumlah 85 orang. Data dianalisis secara deskriptif dengan analisis univariat, data mengenai kadar Pb dan MDA dianalisis dengan uji hubungan Rank-Spearman.Hasil : Hasil penelitian menunjukkan bahwa rerata usia ibu hamil adalah 30,15 tahun dengan rentang usia terbesar adalah 20-35 tahun. Rerata usia kehamilan adalah 27,62 minggu atau dominan berada pada trimester 2 dan 3 kehamilan (43,5% dan 54,1%). Ibu hamil dalam penelitian ini adalah orang yang berisiko tinggi terpapar tembakau dan pestisida (28,2% dan 78,8%). Rerata kadar timbal dalam darah ibu hamil sebesar 42.67 μg / dl dan MDA sebesar 377.3 ng/ml. Hasil uji hubungan antara kadar timbal dan kadar MDA dalam darah ibu hamil menunjukkan tidak adanya hubungan yang signifikan (p>0,05).Simpulan : Kadar timbal dalam darah di wilayah ini dapat dikaji lebih dalam. Ibu hamil disarankan untuk mencegah terkena paparan timbal dengan menghindari asap rokok, pestisida, tidak mengkonsumsi makanan yang terkontaminasi timbal, dan meminimalkan paparan asap kendaraan.
Early commensal interaction between humans and hares in Neolithic northern China
Authors: Sheng Pengfei , Hu Yaowu , Sun Zhouyong , Yang Liping , Hu Songmei , Fuller Benjamin T. , Shang Xue
Published: May 2020

Human influence on ecological niches can drive rapid changes in the diet, behaviour and evolutionary trajectories of small mammals. Archaeological evidence from the Late Neolithic Loess Plateau of northern China suggests that the expansion of millet cultivation created new selective pressures, attracting small mammals to fields and settlements. Here, the authors present direct evidence for commensal behaviour in desert hares (Lepus capensis), dating toc. 4900 years ago. Stable isotope ratio analysis of hare bones from the Neolithic site at Yangjiesha shows a diachronic increase in a C4(millet-based) diet, revealing, for the first time, the expansion of ancient human-hare interactions beyond the predator-prey relationship.
A Coaching Session Framework to Facilitate Long-Term Athletic Development
Authors: Till Kevin , Eisenmann Joe , Emmonds Stacey , Jones Ben , Mitchell Tom , Cowburn Ian , Tee Jason , Holmes Neil , Lloyd Rhodri S.
Published: May 2020

The implementation of long-term athletic development (LTAD) aims to improve health, physical activity, and performance of all youth. Contemporary LTAD models suggest that a broad range of physical and psychosocial competencies should be developed in youth, but few resources are available for coaches that describe “how” to achieve these outcomes. This article overviews a coaching session framework built around the following components: raise, activate, mobilize, prepare, activity, games, evaluate (RAMPAGE). The framework provides practitioners with information on what can be planned and delivered and when within a coaching session, across multiple ages and stages of development within multiple contexts (e.g., physical education and talent development).
Les pôles dans leur espace périphérique
Authors: Proulx Marc-Urbain
Published: May 2020

La ruralité québécoise nécessite des observations pointues pour saisir et analyser sa complexité.Aussi, un regard géoéconomique global offre des perspectives utiles pour éclairer certains phénomènes,notamment la présence de pôles hiérarchisés au sein d’un espace mouvant à mieux maitriser dans ses tendances,telles que l’attraction, la concentration, l’érosion, la rétention, la répulsion, la pénétration et la diffusion.
Lien au territoire selon les générations chez les Anicinapek et les Cris
Authors: Landry Véronique , Asselin Hugo , Lévesque Carole
Published: May 2020

L’objectif de cette recherche exploratoire est d’aborder la triple occultation (ruralité, autochtonieet jeunesse) vécue par les jeunes autochtones en milieu rural en documentant les manifestations des troisaspects du lien au territoire (émotionnel, cognitif et fonctionnel) selon les générations dans deux communautésautochtones au Québec. L’appartenance au territoire (aspect émotionnel) est présente à tous les âges, maisselon une hiérarchie différente entre forêt, communauté et ville. Toutes les générations fréquentent la forêt,mais à des moments différents et pour y pratiquer des activités différentes. Le chez-soi des jeunes est la communauté, tandis que celui des aînés, la forêt. L’aspect cognitif se reflète par la perception de menace face à la dégradation du territoire, particulièrement chez les aînés. Quelques jeunes ont un faible lien au territoire, probablement parce que cette période de la vie est caractérisée par une quête identitaire. Toutes les générations pratiquent des activités traditionnelles (aspect fonctionnel), mais de façon différente.
Validation of QTLs for Fiber Quality Introgressed from Gossypium mustelinum by Selective Genotyping
Authors: Chen Qi , Wang Wei , Wang Caixiang , Zhang Mi , Yu Jiwen , Zhang Yifei , Yuan Baotong , Ding Yunyun , Jones Don C , Paterson Andrew H , Chee Peng W , Wang Baohua
Published: May 2020

Gene introgression from wild species has been shown to be a feasible approach for fiber quality improvement in Upland cotton. Previously, we developed an interspecific G. mustelinum × G. hirsutum advanced-backcross population and mapped over one hundred QTL for fiber quality traits. In the current study, a trait-based selective genotyping approach was utilized to prioritize a small subset of introgression lines with high phenotypic values for different fiber quality traits, to simultaneously validate multiple fiber quality QTL in a single experiment. A total of 75 QTL were detected by CIM and/or single-marker analysis, including 11 significant marker-trait associations (P < 0.001) and three putative associations (P < 0.005) also reported in earlier studies. The QTL that have been validated include three each for fiber length, micronaire, and elongation, and one each for fiber strength and uniformity. Collectively, about 10% of the QTL previously reported have been validated here, indicating that selective genotyping has the potential to validate multiple marker-trait associations for different traits, especially those with a moderate to large-effect detected simultaneously in one experimental population. The G. mustelinum alleles contributed to improved fiber quality for all validated loci. The results from this study will lay the foundation for further fine mapping, marker-assisted selection and map-based gene cloning.
Elderly Attitudes on the Continuity of Working Careers
Authors: Vilkoitytė Violeta , Skučienė Daiva
Published: May 2020

This article analyses the elderly attitudes on the continuity of working careers in different sectors of the labour market. It discusses theoretical approaches and the determining factors of older people participation in the labour market. Attention is drawn to the impact they have in different labour market sectors. The investigation was carried out in primary quantitative data analysis. The factors of participation in different labour market sectors were analysed using the data of the European Working Conditions Survey (2015). Primary data are treated with the statistical software package (SPSS). Data analysis includes frequency distribution, cross-tabulation, chi-square tests, factor analysis, and logistic regression methods. The research results shown that in Lithuania, three quarters of the elderly want to pursue a professional career, but attitudes vary across sectors. Logistic regression models showed that job and health satisfaction is particularly important for all sectors. Gender is important in agriculture, hotels, and education. In the financial, public administration, education and health services, the role of education plays an important role and increases the attitudes of working longer. Harmful factors identified during the study had an impact on four branches. Psychologically challenging conditions have affected the financial and educational sectors, harmful substances and physically demanding working conditions affect the attitudes of workers in the manufacturing sector, and harmful feelings affect the agricultural sector workers.
Sintesis Membran Komposit PVDF-Zeolit untuk Penghilangan Metilen Biru
Authors: Suryandari Ervin Tri
Published: May 2020

Metilen  biru  (MB)  merupakan  zat warna  kation  yang sering  digunakan  dalam industri tekstil, karena harganya yang ekonomis dan mudah diperoleh. Dalam pewarnaan, senyawa ini hanya digunakan sekitar 5% sedangkan sisanya 95% akan dibuang sebagai limbah. Keberadaannya di lingkungan menurunkan kualitas air dan kenaikan BOD (Biological Oxygen Demand)  sehingga  dapat merusak keseimbangan  ekosistem  lingkungan. Metilen biru tidak termasuk zat warna toksik, tetapi dalam keadaan tertentu dapat menimbulkan  beberapa efek yang berbahaya seperti jika tertelan  dapat menyebabkan kesulitan bernafas, menimbulkan sensasi terbakar dalam mulut, mual, muntah, dan diare. Jika terpapar dalam jangka waktu yang lama, dapat menimbulkan nyeri di dada dan perut, sakit kepala, keringat berlebihan. Oleh karena itu, dibutuhkan penanganan limbah metilen biru yang tepat. Dalam penelitian ini dilakukan pembuatan membran komposit poliviniliden fluorida (PVDF)–Zeolit. Penambahan zeolit ke dalam membran PVDF diharapkan dapat meningkatkan kemampuan membran. Proses pembuatan membran menggunakan metode inversi fasa. Larutan PVDF 20% larutan PVDF (b/v) dalam N,N-dimetilformamida (DMF) sebagai pelarut dan air suling sebagai non-pelarut. Sedangkan membran komposit PVDF-Zeolit dibuat dengan menambahka zeolit sebesar 20% (b/b) ke dalam larutan PVDF. Membran yang diperoleh kemudian dikarakterisasi dengan FTIR, SEM, dan ditentukan nilai permeabilitasnya. Berdasarkan citra SEM, membran PVDF bersifat berpori dan penambahan zeolit ke dalam membran PVDF membuat membran menjadi semakin berpori. Membran komposit PVDF-Zeolit memiliki ketebalan yang lebih tipis daripada membran PVDF biasa sehingga proses pemisahan pada membran komposit bisa terjadi lebih cepat. Proses pemisahan metilen biru menggunakan kedua membran diuji berdasarkan penentuan nilai persen rejeksi pada pH 3, 4, 5, dan 6. Hasil menunjukkan kedua membran memiliki nilai persen rejeksi optimum pada pH 5 yaitu sebesar 76,45% dengan nilai permeabilitas sebesar 8,921 Lm-2h-1bar-1 pada membran PVDF, dan 82,65% dengan nilai permeabilitas 19,197 Lm-2h-1bar-1 pada membran komposit PVDF-Zeolit.
Analisis bahan bakar Alternatif Komposit Biobriket dari Eceng gondok dengan Perekat Kotoran Sapi
Authors: Adhani Lisa , Marsya Mutia Annisa , Oktavia Saras , Sindiany Ika Irma
Published: May 2020

Energi terbarukan merupakan energi alternatif yang menjadi isu energi teratas, mengingat menipisnya persediaan bahan bakar bumi (tak terbarukan). Biomassa adalah adalah energi alternatif  yang menarik untuk dikembangkan saat ini, terutama di Indonesia yang dikenal sebagai negeri agraris dan disebut sebagai negeri biodiversitas. Eceng gondok (Eichhornia crassipes) merupakan satu biomassa yang berpotensi sebagai bahan bakar alternatif. Tanaman ini banyak hidup di daerah perairan Indonesia seperti sungai dan rawa-rawa. Pertumbuhan eceng gondok sangat cepat sehingga jumlahnya seringkali melimpah dan tak terkendali. Tanpa adanya pantauan yang baik, membuat tanaman ini menjadi pengganggu habitat disekitarnya. Sehingga memperburuk estetika dan menimbulkan bau. Penelitian ini memanfaatkan eceng gondok menjadi bahan bakar alternatif dengan campuran kotoran sapi sebagai bahan perekatnya. Eceng gondok di manfaatkan menjadi biobriket dengan proses karbonasi anaerob pada  temperature 400ºC. Proses pembuatan biobriket tersebut dilakukan dengan variasi komposisi antara eceng gondok dan kotoran sapi dengan persentase 30%, 50%, dan 70%. Berdasarkan hasil penelitian,  biobriket dengan komposisi kotoran sapi 70% adalah biobriket terbaik jika mengacu pada SNI 01-6235-2000 yaitu  memiliki kadar air 0,0435%, kadar abu 0,47% dan nilai kalor sebesar 4715 kal/gram. Uji SEM (Scanning Electron Microscope) memperkuat kesimpulan dengan menggambarkan morfologi agglomerasi yang teratur sehingga dapat dikatakan membuat rongga pada bagian tengah dari briket, sehingga luas permukaan briket lebih besar yang menyebabkan laju pembakaran lebih tinggi.
Kegiatan Tabligh di Kalangan Penyandang Disabilitas Tunarunungu Wicara
Authors: Mahlufi Nizam Nizam , Sumijaty Siti , Aliyudin Mukhlis
Published: May 2020

Di Jama’ah Tabligh Al-Latifah Buah Batu terdapat penyandang disabilitas tunarungu wicara. Para mubaligh disana menggunakan cara khusus untuk menyampaikan materi tablighnya kepada penyandang disabilitas dengan menggunakan Bahasa Isyarat dengan pendekatan Komunikasi Total. Adapun tujuan penelitian ini untuk mengetahui proses tabligh terhadap penyandang tunarungu wicara, materi tabligh yang disampakan terhadap penyandang tunarungu dan metode yang dilakukan dalam penyampaian materi tabligh terhadap penyandang tunarungu wicara di Jama’ah Tabligh Al-Latifah Buah Batu. Penelitian ini menggunakan metode penelitian dekriptif dengan pendekatan kualitatif dengan mengumpulkan, menganalisis data yang menggambarkan situasi kedaan dan hasil temuan lapangan yang bersifat non-hipotesis, selanjutnya mendeskripsikan  apa yang dilihat, didengar, dirasakan, dan ditanyakan. Hasil penelitian ini menunjukkan bahwa kegiatan tabligh pada proses pelakasanaanya menemukan berbagai macam hambatan, Hambatan-hambatan tersebut adalah: (a) Perbedaan Kemampuan dalam Berbahasa Isyarat, (b) Hambatan lainya. Oleh karena itu ada upaya dalam mengatasi hambatan-hambatan, guna mengoptimalkan peyampaian materi menjadi lebih baik lagi : Mempedalam Bahasa Isyarat Komunikasi Total, (b) Pendekatan Secara Psikologis

  Kata kunci : Tabligh; Tunarungu Wicara; Komunikasi Total.  

In Jama'ah Tabligh Al-Latifah Buah Batu there are persons with hearing impairments. The preachers there use a special method to convey their material to persons with disabilities using Sign Language using the Total Communication approach. The purpose of this study is to find out how the tabligh process of deaf people is speaking, what material is tabligh delivered to deaf people and how the method is carried out in delivering tabligh material to deaf people in Jama'ah Tabligh Al-Latifah Buah Batu. This research uses descriptive research method with a qualitative approach by collecting, analyzing data describing the situation of the situation and the results of non-hypothesis field findings, then describing what is seen, heard, felt, and asked. The results of this study indicate that tabligh activities in the implementation process find a variety of obstacles, these obstacles are: (a) Differences in Sign Language Ability, (b) Other obstacles. Therefore there are efforts in overcoming obstacles, in order to optimize the delivery of material to be even better: Deepening the Total Communication Sign Language, (b) Psychological Approach.

Keywords : Tabligh; Deaf speech; Total Communication.
Prevention of alcohol consumption and transmission of human immunodeficiency virus: randomized clinical trial
Authors: Mendez-Ruiz Martha Dalila , Villegas-Pantoja Miguel Angel , Alarcón-Luna Nohemí Selene , Villegas Natalia , Cianelli Rosina , Peragallo-Montano Nilda
Published: May 2020

Abstract Objective: to know the effects of a nursing intervention to reduce alcohol use and risk factors for transmission of human immunodeficiency virus (HIV). Method: randomized single-blinded clinical trial performed by nurses with young women. The study included 66 participants in the intervention group and 66 participants in the control group. The instruments were the Alcohol Use Disorders Identification Test, the HIV Risk Behavior Knowledge and the Condom Use Self-efficacy Scale. Analysis of variance was used. Results: alcohol involvement decreased in the intervention group (F (1.119) = 50.28; p < 0.001; η2p = 0.297), while HIV knowledge (F (1.130) = 34.34; p < 0.001; η2p = 0.209) and condom use self-efficacy increased (F (1.129) = 27.20; p < 0.001; η2p = 0.174). In addition, less participants consumed alcohol in the past week compared to the control group (χ2 = 15.95; p < 0.001). Conclusion: the nursing intervention had positive effects, which could help young women stay away from alcohol use and the risk of sexually transmitted infections. NCT: 02405481.
Sociodemographic and obstetric factors related to low birth weight in the context of early pregnancy
Authors: Santos Brenda Karoline , Barreto Viviane Macedo Marinho , Santos Vinícius Souza , Prado Neyana Maria Coelho de Souza , Silva José Rodrigo Santos , Bispo Ana Jovina Barreto , Soares Andrea Ferreira
Published: May 2020

Abstract Objectives: to analyze sociodemographic and obstetric factors that may influence the occurrence of low birth weight in the context of early pregnancy. Methods: the sample consisted of 232 pregnant teenagers, aged 10-19 years old, were assisted at a public maternity hospital in Aracaju-SE during the period of August 2012 to July 2016. The data collection was conducted through a structured questionnaire. Results: low birth weight was observed in 41.38% of the newborns and there was a statistical association between the educational level and the marital status with the occurrence of low birth weight in newborns among teenage mothers, with p=0.0286 and p=0.0247, respectively. Conclusions: the socioeconomic factors may contribute to the occurrence of low birth weight in newborns of teenage mothers and teenage pregnancy at this age represents a serious public health problem.
Prenatal and puerperium nutritional care from an integrality perspective in a city of Baixada Santista, São Paulo, Brazil
Authors: Laporte Anna Sylvia de Campos Motta , Zangirolani Lia Thieme Oikawa , Medeiros Maria Angélica Tavares de
Published: May 2020

Abstract Objectives: to perform a comparative assessment of the nutritional care process in the prenatal and puerperium periods at a primary care unit in the city of Santos, SP, Brazil before and after the implantation of the Prenatal and Puerperium Nutritional Care Strategy. Methods: a cross-sectional study was composed of 58 pairs of women and their children, of whom, 30 underwent prenatal care before and 28 of them after the implantation by collecting data from perinatal registrations and children's charts. The care was evaluated by the official National guidelines. The chi-square test was used to compare variables between the pre and post intervention groups. Results: there was a significant improvement after the nutritional intervention, regarding to height (p=0.001), registration on pre-pregnancy weight (p=0.032), follow up on Body Mass Index/gestational week (p=0.001), registration on newborn’s weight at discharge (p=0.011) and daily weight gain at the first pediatric consultation (p=0.019). Conclusions: the Prenatal and Puerperal Nutritional Care Strategy contributed to improve maternal-child nutritional care and the data registration on patients’ charts, demonstrating the necessity to establish processes/flows and an integral care for this population.
Relationship between the type of delivery and the epidemiological profile of prenatal and perinatal assistance in a municipality of Minas Gerais
Authors: Silva Elvis Vieira da , Costa Mariana Amorim de Andrade , Almeida Karine Cristine de , Araujo Laís Moreira Borges , Amâncio Natália de Fátima Gonçalves
Published: May 2020

Abstract Objectives: to describe the profile of prenatal and perinatal health by correlating it with sociodemographic and clinical conditions, verifying the effectiveness of health actions. Methods: quantitative, descriptive and retrospective research using data from the Live Birth Information System (Sinasc) of the municipality of Patos de Minas in the period of 2011 to 2015. Results: between 2011 and 2014 there was a reduction in the rate of vaginal births and a slight increase in 2015, however, the rates of cesarean delivery were higher than recommended by the Ministry of Health. In both types of delivery, most pregnant women attended seven or more prenatal consultations, however, this rate was significantly higher for pregnant women who underwent cesarean section. Maternal age > 35 years was also related to cesarean delivery, however, there was no significant relationship between type of delivery, the gestation time, birth weight and occurrence of maternal death. Conclusions: during the analyzed period there were more cesarean sections in relation to vaginal deliveries, with no significant change in the number of maternal deaths. A significant association was found between the highest number of prenatal consultations and maternal age > 35 years in pregnant women who underwent caesarean section. Verification of these associations can help in reorienting health practices in the region.
Determinants of the success of equity crowdfunding campaigns
Authors: Felipe Israel José dos Santos , Ferreira Bruno César Franca
Published: May 2020

ABSTRACT Given that equity crowdfunding has grown significantly in Brazil and that this market has been frequently sought by startups as an alternative to scarce credit, this study investigated the elements that determine the success of their financing campaigns. The article fills the gap related to the absence of studies analyzing the probability and time of success of startup financing. In Brazil, the research on this is still in its infancy and there has been little discussion regarding what can determine the success of this type of financing. The findings presented here provide managerial contributions for different stakeholders, ranging from platform managers and entrepreneurs to the ordinary citizen, who ultimately acts as an inducer of change in society, without the need for financial intermediaries. The discussion around the elements that influence the success of startup financing has revealed that the characteristics of the venture profile have been able to determine the success of the financing. This information applied to the dynamic of resource allocation in this market can generate more financial efficiency for private agents as an investment performance parameter and, for public agents, as an input for monitoring. The logistic regression with marginal effects and a dummy for time fixed effects were used. The time of success analysis was carried out via survival models. The sample covers 99 startup financing campaigns from 2014 to 2017. The study identified that the financial goal, the venture category, advisor participation, the campaign duration, and the type of equity offered to the investor positively affect both the probability and speed of success of the startup financing. Its contribution lies in the use of these findings to formulate strategies geared toward estimating success, which enable an appropriate allocation of financial resources.
Exposição ocupacional a agrotóxicos organofosforados e neoplasias hematológicas: uma revisão sistemática
Authors: Moura Luiza Taciana Rodrigues de , Bedor Cheila Nataly Galindo , Lopez Rossana Veronica Mendoza , Santana Vilma Sousa , Rocha Talita Máira Bueno da Silveira da , Wünsch Filho Victor , Curado Maria Paula
Published: May 2020

RESUMO: Objetivo: Atualizar achados de estudos observacionais analíticos sobre a associação entre exposição ocupacional a organofosforados e neoplasias hematológicas. Métodos: Revisão sistemática de literatura, incluindo estudos de coorte e caso controle, sem limitação de tempo de publicação, nos idiomas português e inglês. O rastreamento de artigos foi feito no período de junho de 2017 a julho de 2019 nas bases de dados PubMed, MEDLINE, LILACS, Web of Science e Scopus. A avaliação qualitativa de risco de viés foi feita com a Escala Newcastle-Otawa e com o Checklist Downs e Black. Os resultados foram apresentados segundo as recomendações da Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA). Resultados: Foram elegíveis 17 estudos avaliados como de boa/alta qualidade metodológica. A exposição a diazinon (um coorte), fonofós (um coorte), diclorvós, crotoxifós e fanfur (um caso controle) associou-se à leucemia, enquanto a exposição a organofosforados associou-se aos linfomas (seis caso controle). O risco de linfoma não-Hodgkin foi maior para os indivíduos expostos a diazinon (um caso controle) e malation (três caso controle), em relação aos não expostos. O mieloma múltiplo ocorreu mais comumente em expostos a organofosforados do que entre os não expostos (um caso controle). Conclusão: A exposição ocupacional a organofosforados aumenta o risco de neoplasias hematológicas, sobretudo entre os indivíduos com maior período de exposição. Medidas de monitoramento de trabalhadores e de controle da exposição são recomendadas.
Usefulness of Kidney Donor Profile Index (KDPI) to predict graft survival in a South Brazilian Cohort
Authors: Prado Natália Petter , Silva Cynthia Keitel da , Meinerz Gisele , Kist Roger , Garcia Valter Duro , Keitel Elizete
Published: May 2020

Abstract Introduction: Kidney Donor Profile Index (KDPI) has been incorporated in the United States to improve the kidney transplant allocation system. Objectives: To evaluate deceased kidney donors’ profile using KDPI and compare to the previous United Network for Organ Sharing (UNOS) definition of expanded criteria donors (ECD) and assess the KDPI applicability to predict five-year graft survival and renal function in our sample. Methods: Retrospective cohort of 589 kidney transplants from deceased donors performed from January 2009 to May 2013 with follow-up until May 2018. Results: In 589 kidney transplants, 36.6% of donors were classified as ECD and 28.8% had KDPI ≥ 85%. Mean KDPI was 63.1 (95%CI: 60.8-65.3). There was an overlap of standard and ECD in KDPI between 60 and 95 and a significantly lower death-censored graft survival in KDPI ≥ 85% (78.6%); KDPI 0-20: 89.8%, KDPI 21-59: 91.6%, and KDPI 60-84: 83.0%; p = 0.006. The AUC-ROC was 0.577 (95%CI: 0.514-0.641; p = 0.027). Renal function at 5 years was significantly lower according to the incremental KDPI (p < 0.002). KDPI (HR 1.011; 95%CI 1.001-1.020; p = 0.008), donor-specific antibodies (HR 2.77; 95%CI 1.69-4.54; p < 0.001), acute rejection episode (HR 1.73; 95%CI 1.04-2.86; p = 0.034) were independent and significant risk factors for death-censored graft loss at 5 years. Conclusion: In our study, 36.6% were classified as ECD and 28.8% had KDPI ≥ 85%. KDPI score showed a moderate power to predict graft survival at 5 years. Renal function was significantly lower in patients with higher KDPI.
Podendo ser si-mesmo: experiências de adolescentes com doenças crônicas de pele em acampamento
Authors: Costa Camila de Souza , Souza Marcela Astolphi de , Melo Luciana de Lione
Published: May 2020

Resumo Objetivo compreender as experiências de adolescentes com doenças crônicas de pele que participaram de acampamento. Método estudo fenomenológico, com seis adolescentes com diagnóstico de doença crônica de pele, participantes de acampamento no Brasil. Coleta de dados: foram realizadas entrevistas fenomenológicas, no período de julho de 2015 a janeiro de 2016. Resultados três categorias temáticas emergiram e possibilitaram a compreensão do fenômeno. Participar do acampamento acarreta mudança na vida dos adolescentes e em seus modos-de-ser no mundo cotidiano. Impulsiona-os a refletir sobre o estigma já vivenciado anteriormente e as novas experiências, após participarem do acampamento, os auxilia no enfrentamento dos desafios da própria vida de maneira mais otimista. Conclusão Para os adolescentes, a experiência de participar do acampamento é transformadora, devido à possibilidade do encontro com pares e de vivenciar um ambiente livre de preconceito, permitindo ao adolescente ser si-mesmo. Implicações para prática Os acampamentos promovem interação entre pares, sendo estratégias acessíveis para profissionais de saúde, especialmente aos enfermeiros. Intervenções que, de fato, promovam assistência integral à saúde de crianças e adolescentes com condições crônicas de saúde e seus familiares, além da articulação entre serviços de complexidades distintas e seus profissionais de saúde, podem garantir o acesso ao cuidado de qualidade.
A saúde em região de fronteira: o que dizem os documentos do Mercosul e Unasul
Authors: Aikes Solange , Rizzotto Maria Lucia Frizon
Published: May 2020

Resumo Este artigo objetivou analisar o tratamento dado ao tema da saúde em região de fronteira no âmbito do Mercado Comum do Sul (Mercosul) e da União das Nações Sul-Americanas (Unasul). Para isso, realizou-se uma pesquisa documental em arquivos disponíveis nos sítios eletrônicos dessas instituições. Os dados foram tratados com base na técnica de análise de conteúdo. No Mercosul, o tema é abordado em várias reuniões do Subgrupo de Trabalho da Saúde, com a proposta, inclusive, de criação de um consórcio Mercosul-Saúde, que não se efetivou. O que avançou foram propostas relativas à harmonização de normas gerais de vigilância sanitária e epidemiológica. A recente criação do Subgrupo de Trabalho Integração Fronteiriça 18 gera novas perspectivas sobre os processos de transfronteirização. Na Unasul, observa-se uma visão mais solidária sobre o tema da saúde em região de fronteira, tendo como ponto de partida a garantia do direito à saúde aos residentes nesses territórios. Pode-se concluir que ambas as instituições assumiram importante papel no desenvolvimento e no processo de integração da região. Em contraponto, a integração social aparece de forma incipiente. Cabe aos cidadãos sul-americanos, em especial aos fronteiriços, o desafio de reconhecerem-se como parte integrante desses organismos e lutarem pelo reconhecimento do direito à saúde como direito humano fundamental.
A New Single Phase Inverter Based on Buck Converter
Authors: YALÇIN Faruk , ARİFOĞLU Uğur , YAZİCİ İrfan
Published: May 2020

In this paper, a new single phase inverter is proposed. The proposed inverter topology is obtained through modifying the well-known DC-DC buck converter to produce sine wave alternative voltage at the output. Thus, the peak value of the alternative output voltage can be provided lower than the input direct voltage value. The inverter is designed for producing alternative voltage at the output in the frequency range of 0-50 Hz. PI feedback controller is used for the control of the inverter operation. A simulation study is done for the proposed inverter and its operation in MATLAB-Simulink in order to prove its accuracy on different operation conditions. The results demonstrate that the proposed inverter can accurately produce nearly sine wave alternative voltage in various frequencies with low THD values on different operation conditions.