bluuebunny/crossref_metadata_2025 huggingface dataset:
ANC–BNC Titrations and Geochemical Modeling for Characterizing Calcareous and Siliceous Mining Waste
Authors: Drapeau Clémentine , Delolme Cécile , Vézin Clément , Blanc Denise , Baumgartl Thomas , Edraki Mansour , Lassabatere Laurent
Published: March 2021

Pyrite and calcite are mineral phases that play a major role in acid and neutral mine drainage processes. However, the prediction of acid mine drainage (AMD) or contaminated neutral drainage (CND) requires knowledge of the mineral composition of mining waste and the related potential for element release. This paper studies the combination of acid–base neutralizing capacity (ANC–BNC) with geochemical modeling for the characterization of mining waste and prediction of AMD and CND. The proposed approach is validated with three synthetic mineral assemblages: (1) siliceous sand with pyrite only, representing mining waste responsible for AMD, (2) siliceous sand with calcite and pyrite, representing calcareous waste responsible for CND, and (3) siliceous sand with calcite only, simulating calcareous matrices without any pyrite. The geochemical modeling approach using PHREEQC software was used to model pH evolution and main element release as a function of the added amount of acid or base over the entire pH range: 1 < pH < 13. For calcareous matrices (sand with calcite), the results are typical of a carbonated environment, the geochemistry of which is well known. For matrices containing pyrite, the results identify different pH values favoring the dissolution of pyrite: pH = 2 in a pyrite-only environment and pH = 6 where pyrite coexists with calcite. The neutral conditions can be explained by the buffering capacity of calcite, which allows iron oxyhydroxide precipitation. Major element release is then related to the dissolution and precipitation of the mineral assemblages. The geochemical modeling allows the prediction of element speciation in the solid and liquid phases. Our findings clearly prove the potential of combined ANC–BNC experiments along with geochemical modeling for the characterization of mining waste and the assessment of risk of AMD and CND.
An Investigation of the Socio-Economic Benefits of Small-Scale Gold Mining in Malawi
Authors: Haundi Tiyamike , Tsokonombwe Gift , Ghambi Steven , Mkandawire Theresa , Kasambara Ansley
Published: March 2021

In the recent years, there has been a surge in artisanal and small-scale gold mining (ASGM) in various districts of Malawi. Reports of a gold rush have emerged in various districts, including Mangochi, Lilongwe, Balaka, and lately in Kasungu. There has been persistence by many indigenous communities participating in ASGM activities, yet little is being done by the government to formalize and support the sub-sector. The purpose of this study was to investigate the benefits of artisanal small-scale gold mining in Malawi and expose the shortfalls so that key stakeholders and policy makers are well informed. A quantitative approach which used semi-structured questionnaires was used and the data was analyzed using Microsoft excel and Statistical Packages for the Social Sciences (SPSS). The study shows that ASGM is characterized by people with low literacy levels, who use traditional tools (low-tech) and use methods fueled by lack of capital, and deficiency of basic knowledge of mining and geology. The study found that the government could achieve substantial socio-economic development from the sector by: (1) revising the current artisanal and small-scale mining (ASM) legislation so that it embraces the customary practices whilst safeguarding the environment and improving the tax collection base; (2) providing support in form of mining related training and education to these communities; (3) leading in transfer of modern technologies for improved extraction; (4) supporting ASM cooperatives in securing credit facilities from financial institutions; and (5) closing the existing knowledge gap for ASM related issues through introduction of mining desk officers in district councils.
Nanocellulose/PEGDA Aerogels with Tunable Poisson’s Ratio Fabricated by Stereolithography for Mouse Bone Marrow Mesenchymal Stem Cell Culture
Authors: Tang Aimin , Ji Jiaoyan , Li Jiao , Liu Wangyu , Wang Jufang , Sun Qiuli , Li Qingtao
Published: March 2021

In this study, nanocellulose aerogels with a tunable Poisson’s ratio were fabricated. Tissue engineering scaffolds with a tunable Poisson’s ratio may be better able to simulate the mechanical behavior of natural tissues. A mixture of cellulose nanofibers (CNFs) and polyethylene glycol diacrylate (PEGDA) was used as the raw material to prepare CNF/PEGDA aerogels with a multiscale pore structure through a combination of stereolithography (SLA) and freeze-drying. The aerogels were fabricated with a regular macropore network structure and a random and homogeneous distribution of micropores. The macropore structure of the scaffolds could be customized through SLA, which resulted in scaffolds that exhibited one of three different mechanical behaviors: positive Poisson’s ratio (PPR), negative Poisson’s ratio (NPR) or zero Poisson’s ratio (ZPR). Then, the hydrogel scaffolds were transformed into aerogel scaffolds through the freeze-drying method, which endowed the scaffolds with homogeneously distributed micropores. The material ratio and exposure were adjusted to obtain scaffolds with a clear pore structure. Then, the CNF/PEGDA scaffolds with different Poisson’s ratios were subjected to mechanical tests, and their chondrogenic induction characteristics were determined. The NPR scaffold not only provided a good environment for cell growth but also affected mouse bone marrow mesenchymal stem cell (mBMSC) proliferation and chondrogenic induction. Thus, we provide a feasible scheme for the preparation of three-dimensional scaffolds with a multiscale pore structure and tunable Poisson’s ratio, which contributes to cartilage repair in tissue engineering.
Screening for Effects of Inhaled Nanoparticles in Cell Culture Models for Prolonged Exposure
Authors: Meindl Claudia , Öhlinger Kristin , Zrim Verena , Steinkogler Thomas , Fröhlich Eleonore
Published: March 2021

Respiratory exposure of humans to environmental and therapeutic nanoparticles repeatedly occurs at relatively low concentrations. To identify adverse effects of particle accumulation under realistic conditions, monocultures of Calu-3 and A549 cells and co-cultures of A549 and THP-1 macrophages in the air–liquid interphase culture were exposed repeatedly to 2 µg/cm2 20 nm and 200 nm polystyrene particles with different functionalization. Particle accumulation, transepithelial electrical resistance, dextran (3–70 kDa) uptake and proinflammatory cytokine secretion were determined over 28 days. Calu-3 cells showed constant particle uptake without any change in barrier function and cytokine release. A549 cells preferentially ingested amino- and not-functionalized particles combined with decreased endocytosis. Cytokine release was transiently increased upon exposure to all particles. Carboxyl-functionalized demonstrated higher uptake and higher cytokine release than the other particles in the A549/THP-1 co-cultures. The evaluated respiratory cells and co-cultures ingested different amounts and types of particles and caused small (partly transient) effects. The data suggest that the healthy cells can adapt to low doses of non-cytotoxic particles.
Comparative Study of Carbon Nanosphere and Carbon Nanopowder on Viscosity and Thermal Conductivity of Nanofluids
Authors: Ba Thong Le , Bohus Marcell , Lukács István Endre , Wongwises Somchai , Gróf Gyula , Hernadi Klara , Szilágyi Imre Miklós
Published: March 2021

A comparative research on stability, viscosity (µ), and thermal conductivity (k) of carbon nanosphere (CNS) and carbon nanopowder (CNP) nanofluids was performed. CNS was synthesized by the hydrothermal method, while CNP was provided by the manufacturer. Stable nanofluids at high concentrations 0.5, 1.0, and 1.5 vol% were prepared successfully. The properties of CNS and CNP nanoparticles were analyzed with Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), specific surface area (SBET), X-ray powder diffraction (XRD), thermogravimetry/differential thermal analysis (TG/DTA), and energy dispersive X-ray analysis (EDX). The CNP nanofluids have the highest k enhancement of 10.61% for 1.5 vol% concentration compared to the base fluid, while the CNS does not make the thermal conductivity of nanofluids (knf) significantly higher. The studied nanofluids were Newtonian. The relative µ of CNS and CNP nanofluids was 1.04 and 1.07 at 0.5 vol% concentration and 30 °C. These results can be explained by the different sizes and crystallinity of the used nanoparticles.
Improving the Stability of High-Voltage Lithium Cobalt Oxide with a Multifunctional Electrolyte Additive: Interfacial Analyses
Authors: Liao Xing-Qun , Li Feng , Zhang Chang-Ming , Yin Zhou-Lan , Liu Guo-Cong , Yu Jin-Gang
Published: March 2021

In recent years, various attempts have been made to meet the increasing demand for high energy density of lithium-ion batteries (LIBs). The increase in voltage can improve the capacity and the voltage platform performance of the electrode materials. However, as the charging voltage increases, the stabilization of the interface between the cathode material and the electrolyte will decrease, causing side reactions on both sides during the charge–discharge cycling, which seriously affects the high-temperature storage and the cycle performance of LIBs. In this study, a sulfate additive, dihydro-1,3,2-dioxathiolo[1,3,2]dioxathiole 2,2,5,5-tetraoxide (DDDT), was used as an efficient multifunctional electrolyte additive for high-voltage lithium cobalt oxide (LiCoO2). Nanoscale protective layers were formed on the surfaces of both the cathode and the anode electrodes by the electrochemical redox reactions, which greatly decreased the side reactions and improved the voltage stability of the electrodes. By adding 2% (wt.%) DDDT into the electrolyte, LiCoO2 exhibited improved Li-storage performance at the relatively high temperature of 60 °C, controlled swelling behavior (less than 10% for 7 days), and excellent cycling performance (capacity retention rate of 76.4% at elevated temperature even after 150 cycles).
You Don’t Learn That in School: An Updated Practical Guide to Carbon Quantum Dots
Authors: Sousa Helena B. A. , Martins Catarina S. M. , Prior João A. V.
Published: March 2021

Carbon quantum dots (CQDs) have started to emerge as candidates for application in cell imaging, biosensing, and targeted drug delivery, amongst other research fields, due to their unique properties. Those applications are possible as the CQDs exhibit tunable fluorescence, biocompatibility, and a versatile surface. This review aims to summarize the recent development in the field of CQDs research, namely the latest synthesis progress concerning materials/methods, surface modifications, characterization methods, and purification techniques. Furthermore, this work will systematically explore the several applications CQDs have been subjected to, such as bioimaging, fluorescence sensing, and cancer/gene therapy. Finally, we will briefly discuss in the concluding section the present and future challenges, as well as future perspectives and views regarding the emerging paradigm that is the CQDs research field.
Synthesis of Di-Block Copolymers Poly (Propylene oxide)-block-Poly (9-(2,3-epoxypropyl) Carbazole) via Sequential Addition of Monomers in One Pot
Authors: Izzo Lorella , Lisa Paola , Sacco Olga , Pragliola Stefania
Published: March 2021

Polypropylene oxide (PPO) and poly(9-(2,3-epoxypropyl) carbazole) (PEPK) di-block copolymers are prepared in one pot via sequential monomer addition by using i-PrONa/i-Bu3Al as an anionic catalytic system. An almost 100% monomer conversion is obtained, and the length of each block is controlled through the monomer/catalyst ratio used. Copolymer molecular weights are quite close to theoretical values calculated assuming the formation of one polymer chain per catalyst; therefore, it is hypothesized that the polymerization reaction proceeds with a living character. The synthesis appears to be particularly efficient and versatile. The calorimetric properties of copolymers obtained in this work are remarkable, since they show two distinct Tg values, corresponding to the PPO and PEPK blocks. The optical measurements of di-block copolymers show more analogous features than those of PEPK homopolymer. Copolymer solution emission spectra just exhibit isolated carbazole fluorescence, whereas in the solid state, film spectra show excimer fluorescence.
Sea Level Fusion of Satellite Altimetry and Tide Gauge Data by Deep Learning in the Mediterranean Sea
Authors: Yang Lianjun , Jin Taoyong , Gao Xianwen , Wen Hanjiang , Schöne Tilo , Xiao Mingyu , Huang Hailan
Published: March 2021

Satellite altimetry and tide gauges are the two main techniques used to measure sea level. Due to the limitations of satellite altimetry, a high-quality unified sea level model from coast to open ocean has traditionally been difficult to achieve. This study proposes a fusion approach of altimetry and tide gauge data based on a deep belief network (DBN) method. Taking the Mediterranean Sea as the case study area, a progressive three-step experiment was designed to compare the fused sea level anomalies from the DBN method with those from the inverse distance weighted (IDW) method, the kriging (KRG) method and the curvature continuous splines in tension (CCS) method for different cases. The results show that the fusion precision varies with the methods and the input measurements. The precision of the DBN method is better than that of the other three methods in most schemes and is reduced by approximately 20% when the limited altimetry along-track data and in-situ tide gauge data are used. In addition, the distribution of satellite altimetry data and tide gauge data has a large effect on the other three methods but less impact on the DBN model. Furthermore, the sea level anomalies in the Mediterranean Sea with a spatial resolution of 0.25° × 0.25° generated by the DBN model contain more spatial distribution information than others, which means the DBN can be applied as a more feasible and robust way to fuse these two kinds of sea levels.
Enhancing the Documentation Process of Traffic Accidents Registry in Gaza City Using GIS
Authors: El-Hallaq Maher
Published: March 2021

aza City is the largest city in the Gaza Strip and the Palestinian territories. The city has a population about 700,000 inhabitants with an average population density of 12600 person/km2. Documentation procedure of traffic accidents in the city is traditional and inefficient. It is not only based on paper formatting but also is not performed in the correct way since it misses the determination of exact position of occurrence of these accidents. Furthermore, documentation data do not involve appropriate level of details and need to be re-organized. This study aims to enhance the documentation process of the traffic accidents in Gaza City using GIS as well as developing appropriate recommendations that can raise the level of traffic safety in it. To enhance the documentation, a new mobile and desktop applications based on GIS Cloud are developed in order to automatically store spatial and descriptive data about traffic accidents in a computerized geodatabase. Many analysis using GIS of the accidents statistics of 2019 are performed. Results indicate that the hot neighborhood in the city is Northern Remal, the hot road is Salah Al-Din Str., the hot period is 12 – 14 O'clock, most accidents are caused by cars, and medium injuries are the dominant of these accidents. The study recommends to build a digital geodatabase that involves all necessary data associated with traffic accidents because it is the basis for planning, analyzing and making decisions. It is also recommended to establish a GIS department in Ministry of Transportation. There is a strong need to legislate binding laws to prevent the increase in the number of traffic accidents in addition to make field actions such as the necessity to set up traffic lights as much as possible near health centers, schools and other public places.
Fluctuations and trends in the numbers of staging waterbirds in south Sweden in September 1973–2013
Authors: Nilsson Leif
Published: March 2021

Regular September counts of staging waterbirds have been undertaken annually in south Sweden since 1973 as a complement to the International Midwinter Counts undertaken in January each year since 1967. The September counts aim to cover the population development of staging waterbirds, especially relating to species that are not wintering in the country. Between 150 and about 200 sites have been included in the calculation of the September indices, using the TRIM method. September indices were calculated for 18 species. The trends over the entire 41-year period were significantly increasing for all but five species (Anas platyrhynchos, Somateria mollissima and Mergus serrator decreasing, whereas Podiceps cristatus and Fulica atra did not show any clear long-term trend). The September indices were in good agreement with the International Midwinter Counts and the winter counts of the Swedish Bird Survey, but much less well with migration counts at Falsterbo and breeding season counts of the Swedish Bird Survey. For the last ten years of the series, six species showed a significantly increasing trend, whereas four species decreased.
A hybrid Common Redstart x Black Redstart (Phoenicurus phoenicurus x P. ochruros) breeding in southeastern Sweden
Authors: Petersson Anncharlotte , Bergner Adam , Thorin Mats
Published: March 2021

Breeding Redstart hybrids occur regularly and have been described from central but not from northern Europe. Many of the hybrids exhibit plumages resembling those of eastern subspecies of Black Redstart, making it difficult to assess the identity of certain birds. We present information on a well-documented breeding by a hybrid male Common Redstart × Black Redstart (Phoenicurus phoenicurus × P. ochruros), successfully rearing offspring together with Common Redstart females at an industrial estate in southeastern Sweden (57°49'16"N; 15°16'52"E) in the summers of 2009–2012. During its first summer at the location, the bird was captured and ringed, representing the second Redstart hybrid ever to be ringed in Sweden. With vocals like Black Redstart, the bird had a plumage highly similar to that of individuals belonging to the subspecies phoenicuroides in central Asia. Examined in hand, the bird exhibited some plumage characters and morphological traits consistent with details previously presented for Redstart hybrids in Europe. We confirm previous assumptions that Redstart hybrids can be separated from similarly looking eastern subspecies of Black Redstarts by means of differences in wing formulae.
Trender i antal ringmärkta fåglar av fyrtio arter på Stora Fjäderäggs fågelstation, nordöstra Sverige, 1985–2014
Authors: Edenius Lars , Alseryd Niklas Lindberg , Wulff Sören
Published: March 2021

Very few data series are available on the long-term development of the bird fauna in northern Sweden. This kind of data is of great interest as there are recent signs that bird populations in northern Sweden are developing less favourable than in southern Sweden. We present trends in annual capture rates of 40 frequently ringed species at Stora Fjäderägg Bird Observatory, NE Sweden, autumns 1985–2014. Significant positive and negative trends were found in ten and eight species, respectively. Great tit, Chaffinch and Long-tailed Tit showed the strongest increases, whereas Northern Wheatear, Willow Tit and Bluethroat decreased the most. There was a significant negative trend in capture index for short-distance migrants and a positive trend for irruptive species/partial migrants. For many species, particularly those that were decreasing, the trends at Stora Fjäderägg are similar to population trends seen in Swedish and Finnish breeding bird surveys. For these species the trends at Stora Fjäderägg could be indicative of long-term population changes.
An Evaluation of Knowledge, Attitude, and Practices of Obstetricians and Midwives Concerning Oral Health of Pregnant Women in Birjand in 2019
Authors: Alizadeh Leili , Allahyari Elahe , Khazaei Farzane
Published: March 2021

Background: Periodontal disease in pregnant women usually occurs due to physiological changes during pregnancy and is associated with adverse prenatal and perinatal outcomes. However, pregnant women are reluctant to visit a dentist because of unreliable information or perceived hazards of dental procedures for the mother and fetus. Therefore, it is vital to examine the knowledge and practice of obstetricians and midwives and their attitude towards oral health of pregnant women as they are closely connected with these women. Methods: In this study, 90 obstetricians and midwives from Birjand were randomly selected. The data for their knowledge, attitude, and practice were collected through self-report. The scale developed by Malek Mohammadi et al, with a high reliability of 80%, was used for data collection. Data analysis was performed using SPSS version 22.0. Results: Most of the participants (65.6%) worked in the hospital setting, and an average period of 10.32±8.24 years had passed from the subjects’ graduation. Of them, 82.2% provided care services for more than 40 hours per week for an average number of 31.3±67.6 patients. The mean score of knowledge, attitude, and practice were 6.27±1.33, 19.43±2.10, and 4.32±1.35, respectively. All participants considered it important to observe oral health during pregnancy, and 91.1% referred their patients to the dentist. Most of the participants (37.78%) obtained their information from continuous medical education programs. Conclusions: The results of this survey showed that the attitude and practice of obstetricians and midwives were satisfactory given their level of knowledge about the importance of oral health during pregnancy. However, they were still far from standard guidelines. Therefore, it is recommended that their knowledge and skills should be increased to obtain optimal care during pregnancy.
Pengaruh Model Pembelajaran Discovery Learning dengan Metode Demonstrasi ‎Terhadap Pemahaman Konsep Reduksi Oksidasi pada Siswa Kelas X SMA Negeri ‎‎1 Suwawa
Authors: Uge Asna , Lukum Astin , Rumape Opir
Published: March 2021

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Discovery Learning dengan metode demonstrasi terhadap pemahaman Konsep reduksi oksidasi pada siswa Kelas X SMA Negeri 1 Suwawa. Penelitian ini merupakan penelitian True Experiment Design dengan Pretest-Posttest Control Group Design. Penelitian ini dilakukan di SMA Negeri 1 Suwawa dengan sampel penelitian berjumlah 54 siswa, untuk kelas eksperimen berjumlah 27 siswa dan kelas kontrol berjumlah 27 siswa. Kelas eksperimen menggunakan model pembelajaran discovery learning dengan metode demonstrasi dan kelas kontrol menggunakan model pembelajaran discovery learning tanpa demonstrasi. Pengumpulan data menggunakan instrumen dalam bentuk tes pemahaman konsep siswa pada materi reduksi oksidasi. Analisis data menggunakan uji-t untuk menguji hipotesis penelitian dengan taraf signifikan 5%. Nilai t hitung berdasarkan uji t adalah 4,42 yang lebih besar dari t tabel 1,67 pada dk= 52. yang berarti H0 ditolak atau menerima H1. Dengan demikian dapat disimpulkan bahwa terdapat pengaruh penggunaan model pembelajaran discovery learning dengan metode demonstrasi terhadap pemahaman konsep siswa.

Kata Kunci: Discovery Learning; Demonstrasi; Pemahaman Konsep; Reduksi Oksidasi.
Diagnosa Miskonsepsi Siswa SMA Negeri 1 Telaga Gorontalo ‎pada Materi Termokimia
Authors: Sihaloho Mangara , Hadis Sutra S , Kilo Ahmad Kadir , La Kilo Akram
Published: March 2021

Tanpa disadari, setiap siswa senantiasa memiliki miskonsepsi pada materi kimia. Diganosa ‎miskonsepsi sejak dini sangat penting untuk menghentikan miskonsepsi agar tidak berpemngaruh ‎pada konsepsi beikutnya dan hasil belajar yang buru. Penelitian deskriptif ini bertujuan untuk ‎mendiagnosa miskonsepsi siswa SMA Negeri 1 Telaga Gorontalo pada materi termokimia dengan ‎cara tes diagnostik pilihan ganda dua tingkat. Sebanyak 25 soal pilihan ganda tersebut telah valid ‎dan reliabel serta diujikan pada 65 siswa SMA tersebut. Hasil yang diperoleh bahwa jumlah siswa ‎yang mengalami miskonsepsi sangat rendah, rendah, dan sedang masing-masing adalah 60 (92%), ‎‎3 (5%), dan 2 (3%). Sementara, miskonsepsi dengan kategori tinggi dan sangat tinggi tidak ‎ditemukan. Indikator materi yang mengalami miskonsepsi banyak adalah soal tentang teori atau ‎konsep dibandingkan dengan perhitungan. Teori tersebut tentnag membedakan jenis reaksi ‎eksoterm dan endoterm dan membedakan macam-macam perubahan entalpi molar. Hal ini ‎mengindikasikan bahwa siswa lebih banyak menghafal daripada memahami materi termokimia. ‎Hasil diagnosa ini dapat dijadikan acuan untuk pembelajran termokimia agar guru dapat ‎menerapkan cara yang tepat dalam pembelajaran
Can Covid-19 in Wastewater Be Removed by Membrane Processes? A brief review
Authors: YILDIZ Yasemin
Published: March 2021

The world has faced many factors that cause pandemics for a century. There have been three major epidemics caused by coronaviruses in the last 17 years. The most recent outbreak, COVID-19, WHO announced outbreak from epidemic to global pandemic on March 11. More effort is needed to understand why they occur in different enviromental and the frequency of these outbreaks. When looking at the evidence based on wastewater, it is seen that the interest in the presence of coronavirus in wastewater has increased. Even if a broad study of information on the fate and possible contamination of the coronavirus in wastewater is not yet available, there is a few review with coronavirus in wastewater.

This article is the purpose of reviewing the literature regarding the emergence of coronaviruses in wastewater treatment processes. We discussed the literature on the presence, survival, and possible elimination of coronaviruses in common wastewater treatment processes. We also struggle to keep questions on the agenda about potential infection risks for people exposed to untreated sewage / wastewater. Therefore, we focused on the potential risk of coronavirus infection for workers in wastewater treatment plants and the public due to sewage networks.
Sobre el uso, mal uso y abuso de los términos “peligroso” e “importancia médica” en referencia a los artrópodos
Authors: Faúndez Eduardo I.
Published: March 2021

Debido a las publicaciones durante el año 2020 de diversos artículos sobre artrópodos de importancia médica en Chile, y subsiguientes comunicados de prensa y noticias repartidas en distintos medios; han surgido una serie de malentendidos y declaraciones erróneas respecto a la entomología médica.
Las humanidades digitales y la conexión con las raíces culturales a través de la iniciativa portuguesa Aldeias do Xisto
Authors: Renó Denis , Tymoshchuk Oksana , Almeida Ana Margarida , Pedro Luis , Ramos Fernando , Silva Paula Alexandra
Published: March 2021

Para comprender a las humanidades digitales en profundidad se debe observar su aplicabilidad. Un ejemplo de iniciativa que reúne conceptos de las humanidades digitales es la Aldea de Xisto, desarrollada en Portugal para atraer personas a las olvidadas aldeas de Portugal. Estas aldeas, que tienen por característica una construcción en piedra, vivían una realidad de baja densidad demográfica, a pesar de sus ricos trazos culturales y un inmensurable potencial turístico.Este artículo relata la experiencia de la iniciativa rural, Associação Aldeias do Xisto, que ha adoptado estrategias de hipermediación digital para difundir recursos naturales y potencialidades endógenas regionales desde su plataforma digital, transformándolas en atractivos sitios turísticos y aproximando, no solamente turistas sino también portugueses, a importantes raíces culturales de Portugal. Por tanto, se ha desarrollada una investigación que contempla un estudio de caso compuesto por una entrevista semiestructurada de respuestas abiertas y un análisis cuantitativo de la plataforma. Se observa, con la investigación, que Aldeias do Xisto ha desarrollado en la región un encuentro cultural y social, rompiendo las fronteras entre el pasado y el presente portugués, hacia un futuro con positivos impactos sociales, culturales y ambientales.
Vítimas do bisturi. Mídia, gênero e a ponta afiada da biopolítica
Authors: Dos Anjos Júlia
Published: March 2021

Cirurgias plásticas são uma prática difundida mundialmente e, em especial, entre o público feminino brasileiro, o que levou o Brasil a liderar o ranking global de intervenções. A intensa afinidade entre mídia e conhecimento médico é um dos fatores que colaboram para a banalização destas práticas, obliterando os riscos existentes. Com o objetivo de investigar as consequências da articulação entre imprensa, biopolítica e gênero, o presente artigo analisa a cobertura midiática da morte de uma mulher após um procedimento estético. O caso de Lilian Quezia Calixto, que faleceu após intervenção feita pelo médico Denis Cesar Barros Furtado (conhecido como “Dr. Bumbum”), foi escolhido por ter despertado grande atenção da mídia e levantado a incômoda discussão sobre risco de morte deste tipo de procedimento. O exame destas notícias apontou para um processo de culpabilização das vítimas de intervenções corporais, como forma de diminuir a responsabilidade do campo médico perante tais casos. A discussão dos resultados propõe que este tipo de enunciado está imerso em uma cultura somática que normaliza a ação sobre o corpo, fortalece a ideia de individualização e constrói subjetividades – especialmente femininas – em torno do cumprimento às demandas de uma medicina midiatizada e mercantilizada.
EKSPLORASI VEGETASI MANGROVE DI PESISIR LHOK BUBON ACEH BARAT
Authors: Gazali Mohamad -
Published: March 2021

Salah satu komponen ekosistem pesisir dan laut adalah hutan mangrove. Hutan mangrove mempunyai fungsi ekologi yang penting, seperti peredam gelombang dan angin, pelindung pantai dari abrasi, penahan lumpur dan penangkap sedimen yang diangkut oleh aliran air, sebagai daerah asuhan dan tempat mencari makan serta merupakan tempat pemijahan. Tujuan penelitian ini adalah untuk mengeksplorasi vegetasi mangrove yang ada di Pesisir Lhok Bubon Aceh Barat. Metode kegiatan eksplorasi dilakukan dengan mengkoleksi semua tumbuhan yang sedang untuk dijadikan spesimen herbarium. Tumbuhan yang telah diketahui nama marga dan jenisnya dicatat guna melengkapi data kekayaan jenis yang ada. Berdasarkan hasil penelitian menunjukkan bahwa terdapat 8 spesies mangrove yang tersebar di 3 stasiun pengamatan di pesisir Lhok Bubon. Keanekaragaman spesies mangrove masih rendah dibandingkan dengan daerah lainnya. Kondisi spesies mangrove sudah diekploitasi untuk memenuhi kebutuhan hidup atau aktivitas wisata pantai yang meliputi sampah plastik dan bahan pencemar lainnya yang mengganggu ekosistem mangrove.
POTENSI DAUN MANGROVE Sonneratia alba Sm SEBAGAI ANTIBAKTERI ASAL PESISIR KUALA BUBON ACEH BARAT
Authors: Gazali Mohamad , Nufus Hayatun
Published: March 2021

Salah satu manfaat tumbuhan mangrove sonneratia alba adalah sebagai sumber bahan antibakteri pathogen. Tujuan penelitian ini adalah untuk menentukan daya hambat mikroba Eschericia coli dari ekstrak daun mangrove S. alba. Koleksi sampel dilakukan di pesisir Kuala Bubon Aceh Barat. selanjutnya, sampel tersebut diuji antibakteri di Laboratorium Teknologi Hasil Pertanian Fakultas Pertanian Universitas Syiah Kuala. Hasil Penelitian menunjukkan bahwa ekstrak n-heksana memiliki daya hambat bakteri gram negatif (E. coli) sebesar 3,2 mm. sementara ekstrak metanol dan etil asetat sebesar 1,8 dan 0,5 mm. Berdasarkan hasil penelitian tersebut menunjukkan bahwa ekstrak n-heksana memiliki aktivitas antibakteri patogen lebih tinggi dibandingkan dengan ekstrak metanol dan ekstrak etil asetat.
EVALUASI TUTUPAN TERUMBU KARANG BERBASIS MASYARAKAT DI WILAYAH KAWASAN KONSERVASI PERAIRAN DAERAH (KKPD) KABUPATEN ACEH SELATAN
Authors: Bahri Samsul , Purnama Dina Arya , Syawal Syahru , Khairi Ikhsanul
Published: March 2021

Masyarakat merupakan pelaku konservasi utama yang bersentuhan secara langsung dengan wilayah pesisir. Penelitian ini dilakukan bertujuan untuk menghitung persentase tutupan terumbu karang berbasis masyarakat. Partisipasi masyarakat dibentuk guna membangun komunikasi dan kesadaran terhadap lingkungan. Penelitian dilakukan di enam wilayah perairan pada enam kecamatan meliputi Tapak Tuan, Samadua, Meukek, Labuhan Haji Timur, Bakongan dan Bakongan Timur. Penelitian dilakukan dengan menggunakan metode manta tow yang merupakan metode survey terumbu karang berbasis masyarakat. Hasil penelitian menunjukkan persentase tutupan karang keras yang paling tinggi ditemukan pada wilayah perairan Meukek dan Bakongan Timur. Sementara tutupan karang keras yang paling rendah ditemukan pada wilayah perairanBakongan. Keterlibatan masyarakat dalam upaya perlindungan memberikan dampak yang positif terhadap kesehatan terumbu karang. Adanya panglima laot menguatkan bentuk partisipasi masyarakat terhadap pengelolaan wilayah perairan di Aceh Selatan.
ANALISIS NILAI-NILAI PSIKOLOGIS PADA KESENIAN WAYANG AJEN BEKASI
Authors: Hutahaean Erik Saut H , Abdillah Rijal , Finanto Mic
Published: March 2021

Diketahui terdapat satu bentuk kesenian wayang kontemporer yang sangat unik yaitu kesenian wayang ajen. Keunikan wayang ajen terletak pada ceritanya yang mengangkat isu-isu terkini, gerakan wayang yang dimainkan dalang, dan juga terletak pada tata panggung yang lebih modern (menggunakan lighting, dan audio visual yang menarik). Dalam pertunjukannya berusaha meyisipkan pesan bermakna bagi perbaikan ataupun peningkatan kehidupan masyarakat yang menikmatinya (pesan untuk menghadapi situasi yang sedang berkembang). Belum ditemukan kajian yang membahasnya melalui pendekatan keilmuan psikologi. Berdasarkan hal tersebut, maka penelitian ini dilakukan untuk menggali secara kualitatif tentang proses-proses aktivitas dan peristiwa yang mengandung nilai-nilai psikologis pada kesenian wayang ajen. Penggaliannya dilakukan dengan melibatkan dua narasumber penting yang berperan dalam penciptaan kesenian wayang ajen, dan juga dalam pengembangannya sebagai seni pertunjukan yang progresif, dan unit analisis lainnya (tayangan pertunjukan dan dokumentasi cetak). Hasil penelitian memperoleh tema-tema yang berkaitan dengan sejarah kesenian wayang ajen dan nilai-nilai psikologis wayang ajen yaitu; pertama nilai sosiologis-psikologis, kedua Nilai 4R (Raga, rasa, rasio, dan roh), ketiga nilai moral dan spiritual, keempat pendekatan psikologi sosial (reorganisasi kognitif, reorganisasi emosi, dan perubahan perilaku sosial). Kesemua hasil tersebut menjelaskan bahwa pertunjukan kesenian wayang ajen dapat menjadi media psikososial-edukasi untuk menyampaikan nilai-nilai kehidupan yang bermanfaat.
CALIDOSCOPIO: Diversidad cultural y natural en Santiago de Cali
Authors:   Universidad Santiago de Cali, Quinayá Ocampo Diana Patricia
Published: March 2021

En este punto intermedio entre el cielo y el valle, como un caleidoscopio que gira, convergen en perfecta simetría y armonía expresiones y cualidades de una ciudad que se llena de color, a través de la gráfica urbana, las tintas que se transforman en literatura inspirada en esta ciudad, en las luces y sombras del teatro y el plumaje de las aves que surcan los Farallones. La brisa de las 5 de la tarde, la multiplicidad de aves, el color que caracteriza sus calle entre grafitis y murales, sus poetas y escritores, el arte y sus formas, configuran la paleta de color que define a la sucursal del cielo. Estos y otros tantos elementos constituyen la idiosincrasia e identidad caleña, es entonces Cali un Calidoscopio, que gira ante el asombro de sus habitantes y de los visitantes extranjeros, para dejarnos sentir y vivir, como bien lo decía el poeta Carranza, ese “sueño atravesado por un río”.
ВИВЧЕННЯ НЕБЕЗПЕЧНОГО ВПЛИВУ ПРОДУКТІВ ХАРЧУВАННЯ НА ЗДОРОВ'Я ЛЮДИНИ
Authors: Кратко О. , Янків М.
Published: March 2021

У статті розкрито аналіз небезпечного впливу продуктів харчування на здоров’я людини. Проаналізовано безпеку харчування, як основну безпечної життєдіяльності людини та особливості розпізнавання продуктів харчування, які становлять потенційну небезпеку для суспільства. З плином часу та розвитком технологій спостерігається значне додавання різноманітних харчових добавок у продукти харчування та спостерігається можливість їх взаємодії з іншими складниками, що може спричинити загрозу організму людини. У зв’язку із цим перед людством постає нова актуальна проблема. Розв’язання якої потребує систематичного контролю за якістю продуктів харчування, наявністю різноманітних добавок та особливістю їх маркування.
ДОБІР ВИХІДНОГО МАТЕРІАЛУ РОСЛИН ТЮТЮНУ ДЛЯ ГЕТЕРОЗИСНОЇ СЕЛЕКЦІЇ
Authors: Глюдзик-Шемота Маргарита , Савіна Олена
Published: March 2021

У статті розкрито питання добору вихідного посадкового матеріалу рослин тютюну, наведено структуру наявного колекційного матеріалу за біологічним статусом.
ЕКСПЕРИМЕНТАЛЬНІ ДОСЛІДЖЕННЯ ВИЗНАЧЕННЯ ПОКАЗНИКІВ НАДІЙНОСТІ ВІБРАЦІЙНИХ ПЛОЩАДОК
Authors: Делембовський Максим , Клименко Микола
Published: March 2021

Робота присвячена розгляду питань експериментальних досліджень з метою забезпечення подальшого ефективного підвищення надійності вібраційних площадок. На сьогодні проблемою є визначення оптимального запасу міцності при розрахунку на міцність в залежності від прогнозованих критеріїв надійності.
АНАЛІЗ МЕТОДІВ ТА ШЛЯХІВ ВИРІШЕННЯ ЗАХИСТУ ІНФОРМАЦІЇ В ІНФОРМАЦІЙНО-ТЕЛЕКОМУНІКАЦІЙНИХ СИСТЕМАХ
Authors: Делембовський Максим , Шабала Євгенія , Терентьєв Олександр
Published: March 2021

Робота присвячена розгляду питань сучасних методів аналізу інформаційної безпеки інформаційно-телекомунікаційних систем в межах визначення рівня загроз. В роботі визначені ключові питання безпеки інформаційно-телекомунікаційної системи, розглянуті основні ключові заходи захисту інформації та відповідно наведені основні методи забезпечення інформаційної безпеки.
АНАЛІЗ СПЕКТРУ РЕЗОНАНСНИХ ЧАСТОТ ТА ВЛАСНИХ ФОРМ КОЛИВАНЬ КУСКОВО-НЕОДНОРІДНОЇ ОБЛАСТІ ПРЯМОКУТНОГО ПЕРЕТИНУ
Authors: Лупаренко Олена
Published: March 2021

Представлено систематизований аналіз впливу співвідношення механічнихта геометричних параметрів складеного прямокутного перетину на явище крайовогорезонансу. Проведено енергетичний аналіз розподілу динамічної напруженості поблизуграниці розподілу різнорідних областей перетину.
СТАТИСТИЧНІ ХАРАКТЕРИСТИКИ СПОЛУЧУВАНОСТІ СЕМАНТИЧНИХ ПІДКЛАСІВ ПРИСЛІВНИКІВ З ПРИКМЕТНИКАМИ В СУЧАСНІЙ НІМЕЦЬКІЙ МОВІ
Authors: Лейцюсь Галина , Шеверун Надія
Published: March 2021

Стаття присвячена дослідженню сполучуваності семантичних підкласів прислівників з прикметниками в сучасній німецькій мові. Розглянуто статистичні характеристики сполучуваності прислівників: обсяг підкласу, частотність вживання, широту, частотність і інтенсивність сполучуваності, а також вибірковість.
ДОПРОФІЛЬНА ПІДГОТОВКА УЧНІВ: ТЕОРЕТИЧНИЙ І ПРИКЛАДНИЙ АСПЕКТИ
Authors: Холод Ганна
Published: March 2021

У статті “Допрофільна підготовка учнів: теоретичний і прикладний аспекти” обґрунтовано актуальність обраної теми, запропоновано свій варіант комплексної трьохетапної допрофільної підготовки, що впродовж п’яти років дозволить підліткам розкрити свій творчий та інтелектуальний потенціал, а також визначитися з подальшим профілем навчання й майбутньою роботою, презентовано деякі профорієнтаційні заходи та розроблено до них методичні рекомендації.
«ХАРКІВСЬКИЙ ПЕРІОД» ЖИТТЯ ТА ТВОРЧОСТІ З.Є.СЕРЕБРЯКОВОЇ ЯК ПЕРЕЛАМНА ДОБА У БІОГРАФІЇ ХУДОЖНИЦІ
Authors: Доценко Марія , Доценко Ігор
Published: March 2021

В роботі розглянуто місце «Харківського періоду» життєвого та творчого шляху З.Є.Серебрякової у біографії художниці,визначено фактори, що впливали на характер творчості на прикладі картин, написаних у 1917-1920 роки. На основі відомих на сьогодні портретів окреслено найближче коло оточення художниці у 1917-1920 роки.
Neural Flip-Flops IV: Lamprey Locomotion
Authors: Yoder Lane
Published: March 2021

The
lamprey is one of the most ancient of extant vertebrate species. It has changed relatively little in 450
million years and is considered a prototype for all vertebrates. Its primitive nervous system has been studied
extensively, and the basic architecture of the central pattern generator (CPG)
that produces its undulatory swimming motion is well known.

Here
it is shown that each segmental component of the lamprey's CPG is a JK
flip-flop, with additional excitatory inputs and feedback that cause all of the
neurons' states to oscillate. The JK
flip-flop is the most widely used flip-flop design in modern electronic
computational systems because of its advantageous features. This is apparently the first discovery that a
known network of neurons functions as a logic circuit. The
lamprey's oscillator design is apparently new to engineering, making it an
example of neuroscience and logic circuit design informing each other.

A
simulation based on simple neuron responses to excitation and inhibition
illustrates the common period, phase relationships, and burst durations of the segmental
cells' oscillations. Simulation software
for electronic logic circuits verifies the simulated neuron responses, on vastly
different time scales. The simulation
methods presented here may aid in further study of CPG neurophysiology. The novel architecture of the oscillating JK
flip-flop may aid in the development of artificial neural network applications
such as robotics.
ENDÜSTRİYEL BİYOLOJİK FERMANTASYON İŞLEMİ İÇİN DENGE OPTİMİZASYON ALGORİTMASIYLA KONTROLÖR TASARIMI
Authors: ATEŞ Abdullah
Published: March 2021

Bu çalışmada yeni bir meta sezgisel optimizasyon yöntemi olan Denge Optimizasyon (DO) algoritması ile aşı üretiminde gerçekleştirilen biyolojik fermantasyon işleminde kullanılan karıştırıcı modelleri için PID kontrolörler tasarlanmıştır. Öncelikle Denge Optimizasyon algoritması PID kontrolör parametrelerini optimize edebilecek kabiliyete ulaştırılmıştır. Daha sonra algoritmanın çalışma performansına etki eden parametrelerde çalışma esnasında deneysel olarak ayarlanmıştır. Özellikle literatürde daha önceden karıştırıcı modelleri için analitik yöntemlerle tasarlanmış olan PID kontrolör yerine performansı daha iyi olan Denge Optimizasyon algoritmasıyla tasarlanmış PID kontrolörlerin kapalı çevrim sonuçları karşılaştırmalı olarak sunulmuştur. Bu sayede yeni bir algoritma olan denge optimizasyon algoritmasının gerçek mühendislik problemlerinde de kullanılabileceği ve analitik yöntemlere karşın daha iyi kontrol performansına sahip PID kontrolörler türetilebileceği gösterilmektedir.
Primer ve Sekonder Arıtma Çamur Fraksiyonlarının Meyve Atığı ile Anaerobik Çoklu Besiyeri Çürütmesi Ön Çalışması
Authors: ERDİRENÇELEBİ Dilek
Published: March 2021

Kentsel atıksu arıtma tesislerinde (AAT) oluşan primer (PÇ) ve sekonder (SÇ) arıtma çamurlarının meyve atığı ile birlikte anaerobik çürütme çalışması ardışık kesikli reaktörlerde yürütülmüştür. Proseste meyve atığının parçalanması ile yüksek seviyede uçucu yağ asitleri (UYA) oluşarak toksik pH eşiği geçilmiştir. Alkali kaynağı olarak NaOH ilavesi sonrasında pH PÇ ve SÇ için sırasıyla 7.95-8.05 ve 8.16- 8.25 olarak alkali seviyelerde gerçekleşmiş ve UYA’nın etkin metana dönüşümü ile biyogazda sırasıyla %55 (+227-271 mL) ve %400 (+501-546 mL) artış elde edilmiştir. Meyve atığının aynı alkali şartta SÇ için daha yüksek verim ve proses stabilitesi sağladığı gözlenmiştir. Proses için UYA’dan ziyade pH’nın anahtar parametre olduğu belirlenmiştir. NaOH, alkali kaynağı olarak proseste oluşan karbonik asiti bikarbonat alkalinitesine çevirdiği için çift kat etki sağlamıştır. Meyve atığının karbonhidrat içeriği, PÇ ve SÇ çürütmesinde oluşan yüksek pH’nın nötralize edilmesinde faydalı katkı sağlamıştır. Sonuç olarak meyve atığının özellikle SÇ çürütmesinde ilave substrat olarak enerji eldesini arttıracağı belirlenmiştir.
Organik yükleme hızının pH bazında optimize edilmesi ile alkali ilavesiz arıtma çamurlarının ve proteinli atıkların çoklu çürütmesinin kararlı işletimle gerçekleştirilmesi de mümkün olacaktır.
SOSIALISASI INSEKTISIDA NABATI SEBAGAI RAPELLENT VEKTOR KECOAK AMERIKA YANG RAMAH LINGKUNGAN PADA MASYARAKAT DI KECAMATAN TAMBANG KABUPATEN KAMPAR
Authors: Harnani Yessi
Published: March 2021

Kecoa adalah salah satu jenis serangga yang sering ditemui disekitar lingkungan tempat tinggal kita. Untuk mencegah dan meminimalisir terjadinya masalah kesehatan pada manusia maka di lakukan upaya pengendalian dengan menggunakan bahan alami yang berfungsi sebagai insektisida nabati yang ramah lingkungan dan tidak menimbulkan bahaya kesehatan nantinya, yaitu dengan menggunakan Daun Sirih (Piper betle,L). Metode pelaksanaan dalam bentuk penyuluhan dan demonstrasi pembuatan insektisida nabati. Tujuannya adalah Meningkatkan pengetahuan dan keterampilan masyarakat bagaimana cara membuat insektisida nabati yang murah dan ramah lingkungan. Hasil: Terdapat peningkatan pengetahuan dan pemahaman masyarakat tentang bahaya kecoa Amerika bagi Kesehatan dan manfaat daun sirih sebagai insektisida nabati. Masyarakat bisa mempraktekkan di rumah cara membuat insektida nabati yang murah dan ramah lingkungan dari daun sirih. Sebelum diberikan penyuluhan peserta tidak mampu menjawab pertanyaan yang diberikan tetapi setelah diberikan penyuluhan hampir 90 % peserta mampu menjawab pertanyaan dengan benar. Rekomendasi : Diharapkan masyarakat mampu mengantisipasi pengendalian kecoa Amerika dengan menggunakan insektisida nabati yang murah, mudah dan ramah lingkungan. Masyarakat juga dapat menjadikan produk serbuk daun sirih ini sebagai usaha rumah tangga yang bisa di jual