Hasil untuk "Geography"

Katherine Mckittrick

Hammami Saber, Romdhane Hela, Soualmia Amel et al.

Sediment transport plays a vital role in river management and flood protection, particularly in regions prone to erosion and deposition. The study aims to assess the impact of roughness modification on the sediment transport process in the Medjerda, Tunisia’s longest perennial river, following a decade of dredging activities implemented for flood protection measures in the Boussalem city. We used the Telemac Sisyphe model to stimulate sediment 17.8 km section, which regularly undergoes dredging crossing the city of Boussalem. This section contains two distinct parts: first a smooth riverbed followed by the variable roughness on both sides of the banks, which is influenced by the existing vegetation cover. The study developed four simulation scenarios, with a smooth riverbed maintained in call cases while the roughness of the second part increasing from smooth to rough. The model-generated outputs facilitated a comprehensive longitudinal and transverse comparative analysis, focusing on flow velocity, shear stress, and bed evolution profile in response to varying roughness levels. The results show a reduction in erosion and deposition phenomena as the roughness as the bank’s roughness increases. this the crucial role of vegetation in stabilizing river banks by, strengthening the cohesion of the riverbed, thus minimizing erosion risks and excessive sediment transport, ultimately maintaining the riverbed’s integrity. These findings contribute to understanding of sedimentation patterns in the Medjerda River and facilitated the prediction of potential impacts on its fluvial morphology.

E. I. Burt, E. I. Burt, G. R. Goldsmith et al.

<p>Determining the sources of water provisioning streams, soils, and vegetation can provide important insights into the water that sustains critical ecosystem functions now and how those functions may be expected to respond given projected changes in the global hydrologic cycle. We developed multi-year time series of water isotope ratios (<span class="inline-formula"><i>δ</i>¹⁸</span>O and <span class="inline-formula"><i>δ</i>²</span>H) based on twice-monthly collections of precipitation, lysimeter, and tree branch xylem waters from a seasonally dry tropical montane cloud forest in the southeastern Andes mountains of Peru. We then used this information to determine indices of the seasonal origins, the young water fractions (<span class="inline-formula"><i>F</i>_yw</span>), and the new water fractions (<span class="inline-formula"><i>F</i>_new</span>) of soil, stream, and tree water. There was no evidence for intra-annual variation in the seasonal origins of stream water and lysimeter water from 1 m depth, both of which were predominantly comprised of wet-season precipitation even during the dry seasons. However, branch xylem waters demonstrated an intra-annual shift in seasonal origin: xylem waters were comprised of wet-season precipitation during the wet season and dry-season precipitation during the dry season. The young water fractions of lysimeter (<span class="inline-formula">&lt;</span> 15 %) and stream (5 %) waters were lower than the young water fraction (37 %) in branch xylem waters. The new water fraction (an indicator of water <span class="inline-formula">≤</span> 2 weeks old in this study) was estimated to be 12 % for branch xylem waters, while there was no significant evidence for new water in stream or lysimeter waters from 1 m depth. Our results indicate that the source of water for trees in this system varied seasonally, such that recent precipitation may be more immediately taken up by shallow tree roots. In comparison, the source of water for soils and streams did not vary seasonally, such that precipitation may mix and reside in soils and take longer to transit into the stream. Our insights into the seasonal origins and ages of water in soils, streams, and vegetation in this humid tropical montane cloud forest add to understanding of the mechanisms that govern the partitioning of water moving through different ecosystems.</p>

Delia Barrios Barrios, Irma Escudero Vaca

En el contexto mundial de la pandemia del COVID-19, las enfermeras/os han estado presente en el cuidado de enfermería, por tanto, se ha hecho imprescindible las estrategias de afrontamiento para lidiar con la situación. Esta investigación, identifica las estrategias de afrontamiento utilizadas por las enfermeras y los beneficios de dichas estrategias, durante la pandemia COVID-19. Se trata de una revisión integrativa de estudios originales publicados de marzo 2020 a junio de 2022 en idioma español e inglés. Partimos de la pregunta estructurada ¿Cuáles son las estrategias de afrontamiento utilizadas por las enfermeras durante la pandemia del COVID-19 y qué beneficios aportaron? La línea de investigación: Práctica en Enfermería. Bases de datos utilizadas, PUBMED, EBSCO Host, LILACS, SCIENCE DIRECT, BVS, SCIELO, MENDELEY y REDALYC. La estrategia que más beneficios aportó a las enfermeras fue la autoeficacia, ya que les permitía evaluar la capacidad con la que contaban para enfrentar los altos niveles de estrés, luego, las centradas en el problema (PFC), centradas en la emoción (EFC) y el desarrollo de la resiliencia.

Atayan Asya, Rakhimbaeva Elena, Chistyakov Alexander

Software has been developed in the C++ programming language using the MPI parallel programming technology, designed for mathematical modeling of the transport of substances in coastal systems. When calculating the dynamics of the spread of a pollutant, the decomposition of the computational domain was carried out to organize the computational process on a multiprocessor computer system K-60 in KIAM RAS. To solve the system of grid equations obtained as a result of the approximation of the problem, iterative methods were used, with a triangular preconditioner.

Asfoor H.M.A., AL-Jandeel A.A.T., Igorevich K.K. et al.

There are many heritage residential neighborhoods in Baghdad some of them belong more than thousand years because this city is taken the important cultural and social place for hundreds years. In last decades, the issue of preserving, rehabilitating and investing heritage residential neighborhoods has received increasing attention at all political, cultural and academic studies. The biggest problem that prevent the developing design in these places are the historical privacy, the weakness in the structures, the high cost because the rehabilitation and maintenance require the high and special skills experiences. Because of the historical and cultural value and what it represents a wealth of all humanity, the studies and researches that studied these subjects avoided the wading in make bold decisions to get the new design of these places , but limited their interest to the study of job investment in those neighborhoods in particular. In addition to, the role of maintenance and rehabilitation operations in supporting this investment, and from the reality of the shortcomings in the study of economic investment policies in dealing with these neighborhoods and the mechanism of protecting them. The importance comes of studying the maintenance and investment policies of these neighborhoods.

Ying Zhang, Zhengqiang Li, Yuanyuan Wei et al.

Following the accelerated development of urbanization and industrialization, atmospheric particulate matter has become a significant threat to public health globally. Environmental health studies usually use the mass concentration of fine particles (PM2.5) as a base data to predict the health risks of particulate exposure. However, PM2.5 data from ground monitoring stations in China has not been provided until January 2013 by the Ministry of Environmental Protection of China. Hence, an alternative dataset of PM2.5 spatiotemporal distributions extending to years earlier than 2013 is urgently needed, which is of great significance to atmospheric environment assessment and pollution prevention and control. Atmospheric aerosol products by the moderate-resolution imaging spectroradiometer (MODIS) have been released since 2000, which provides the possibility to reconstruct historical PM2.5. However, most current methods do not have the ability to estimate PM2.5 mass concentration independently of ground observations. The PM2.5 mass concentration data set produced by PM2.5 remote sensing (PMRS) model based on physical processes does not depend on the ground observations, and also is not affected by the uncertainty of model emission sources or the completeness of chemical reaction mechanism. These ensure that the point-by-point validation for PM2.5 mass concentration data is more convincing, and the dataset can also be further used for model assimilation and artificial intelligence training to improve their predictions. In this study, we calculate the monthly PM2.5 mass concentration near the ground over land of China using aerosol inversion products (aerosol optical depth and fine-mode fraction) of MODIS and meteorological data (boundary layer height & relative humidity) provided by the Modern-Era Retrospective Analysis for Research and Applications Version 2 (MERRA-2) data set. The results show that, in China, 6 pollution centers mainly concentrated in the central and eastern regions. The highest PM2.5 mass concentration occurred in winter, whereas the pollution range was larger in summer. There are 63.4% of validation sites with biases within ±20 μg m−3, and the expected error is as ±(15 μg m−3 + 30%) enveloped by the monthly mean PM2.5 mass concentrations. The monthly PM2.5 is stored as NETCDF format, with a spatial resolution of 1°×1°. The published data is available in http://www.dx.doi.org/10.11922/sciencedb.j00076.00061.

Vasyura Svetlana, Nikitina Olga

Rapidly developing information technologies bring to crucial changes in different areas of student life activities - learning, communications, leisure – and have an impact on individuals’ activities. Empirical research aims to identify connections of activity and ontological security in communications, knowledge, learning, experiences, reflection. The assumption, that activity in communications and activity in learning have closer links with ontological security than activity in other areas of life, is put forward as a hypothesis. Theoretical basis of the research creates A.A. Volochkov’s concept of activity of an individual (subject), N.V. Kopteva’s theoretical construct of ontological security. The research involves 97 students of medical college at the age of 17-21. The empirical research applied the following methods: methods of “Diagnostics of activity of students” DAS-2 (A.Yu. Popov, A.A. Volochkov); questionary of ontological security (OS-PM); method of ontological security built up on the principle of semantic differential (OS-SD) (N.V. Kopteva). As a result of empirical research, it was stated that broad-spectrum activity of students is implemented and developed in connection with one of the basic grounds of human – ontological security. Out of three model components of activity structure: need in interaction - volitional regulation of interactions - satisfaction with interactions, the first two components are stronger connected with ontological security that the third component. Out of the life spheres where the activity is found, activity in communication and activity in learning have closer connections with ontological security that any other areas of life.

B. I. Cook, J. S. Mankin, A. P. Williams et al.

Abstract Over the last two decades, southwestern North America (SWNA) has been in the grip of one of the most severe droughts of the last 1,200 years, with one third to nearly one half of its severity attributable to climate change. We analyze how the risk of extreme soil moisture droughts in SWNA, analogous to the most severe 21‐year (≥ in magnitude to 2000–2020) and single‐year (≥ in magnitude to 2002) events of the last several decades, changes in projections from Phase 6 of the Coupled Model Intercomparison Project. By the end of the 21st century, SWNA experiences robust (R ≥ 0.80) soil moisture drying and substantial increases in extreme single‐year drought risk that scale strongly with warming, spanning an 8%–26% probability of occurrence across +2–4 K. Notably, our results show that 21‐year droughts analogous to 2000–2020 are up to 5 times more likely than extreme single‐year droughts under all levels of warming (≈50%). These high levels of 21‐year drought risk are largely invariant across scenarios because of large spring precipitation declines in half the models, shifting SWNA into a drier mean state. Despite projections of this sweeping and ostensibly inevitable increase in 21‐year drought risk, climate mitigation reduces their severity by reducing the magnitude of extreme single‐year droughts during these events. Our results emphasize both the importance of preparing SWNA for imminent increases in persistent drought events and constraining projected precipitation uncertainty to better resolve future long‐term drought risk.

Ageyeva Natalia, Tikhonova Anastasia, Biryukova Svetlana et al.

The article is devoted to the research of the makeup of phenolic compounds and fatty acids of grape pomace. The phenolic compounds were identified in skin and seed extracts and in extracts of skin-and-seed mixtures; the fatty acids – in grape oil generated by direct pressing. It was established that anthocyanins were present mainly in the skins. Low concentrations of ten components of the anthocyanin complex were identified in the Saperavi seeds. Maximum amounts of anthocyanins were found in the Saperavi skins. The concentration of quercetin distinguished by a PP-vitamin activity was by 1.5 to 2.0 times higher in the skin-andseed mixtures, especially of Roesler grapes, than in the skin itself. Maximum amounts of flavan-3-ols, hydroxy-cinnamic and hydroxybenzoic acids and oligomeric procyanidins, as well as the highest antioxidant activity were observed in the skin-and-seed mixture. The highest value of the correlation factor was observed in cases of interaction of antioxidant activity and concentration of procyanidins (r = 0.83), antioxidant activity and concentration of anthocyanins (r = 0.78), and antioxidant activity and concentration of flavan-3-ols (r = 0.75). Among the flavan-3-ols, it was (+)-D-Catechin that prevailed in grape seeds, with its concentration in the Pinot Noir extract (OAO APF Fanagoria) reaching 468 mg/dm3. Maximum concentration of Epigallocatechin-gallate was observed in the Saperavi and Pinot Noir seeds. As regards the concentration of hydroxy-cinnamic acids in the seeds, n-coumaric acid (Ancellotta, Saperavi) stood apart among the others; gallic acid (Saperavi, Ancellotta) came forward among the hydroxy-benzoic acids. In the reviewed samples of grape seeds, procyanidins of groups В1 , В2 and В3 distinguished by high antioxidant activity prevailed. Prevalence of linoleic and oleic acids was established for grape oil extracted from the seeds of such red grape varieties as Cabernet Sauvignon, Pinot Noir and Saperavi. Maximum concentrations of oleic acid were found in the Pinot Noir and Riesling seeds. Palmitic and stearic acids were also available in rather high concentrations in the grape oil.

Sepridawati Siregar, Desi Kiswiranti

Abstrak Sungai Klampok mengalir melalui Kecamatan Bergas dan sekelilingnya terdapat beberapa industri sehingga mengakibatkan sungai tersebut tercemar karena menjadi badan penerima air limbah. Akibat penurunan kualitas air Sungai Klampok akan berimbas pada penurunan kualitas air tanah yang digunakan oleh penduduk sekitar sungai tersebut. Penelitian ini bertujuan untuk mengetahui kualitas air tanah yang berada di sekitar Sungai Klampok sebagai akibat adanya pengaruh beban pencemaran oleh air limbah industri berdasarkan Permenkes No. 416/MENKES/PER/IX/1990 tentang persyaratan kualitas air bersih. Lokasi pengambilan sampel air sungai dibagi menjadi 3 stasiun (LK1, LK2 dan LK3) sedangkan untuk sampel airtanah dari rumah-rumah penduduk dilakukan pada 6 titik yaitu 3 titik di daerah utara dari Sungai Klampok (U1,U2, U3) dan 3 titik di daerah selatan dari Sungai Klampok (S1,S2, S3). Pengambilan sampel dilakukan pada musim kemarau. Dari hasil uji kualitas air sungai, pencemaran yang terjadi pada air sungai Klampok masuk dalam kategori tercemar ringan-sedang. Sedangkan hasil uji kualitas air tanah masih berada di bawah baku mutu yang disyaratkan oleh Permenkes No. 416/MENKES/PER/IX/1990, sehingga penurunan kualitas air sungai Klampok tidak mempengaruhi kualitas air tanah di sekitar sungai tersebut.   Abstract The Klampok River flows through the Bergas Subdistrict and there are a number of industries around it, causing the river to become polluted because it becomes the body of the recipient of wastewater. As a result of the decline in the quality of the water in the Klampok River, it will impact on the quality of groundwater used by residents around the river. This study aims to determine the quality of groundwater around the Klampok River as a result of the influence of pollution load by industrial wastewater based on Permenkes No. 416 / MENKES / PER / IX / 1990 concerning requirements for clean water quality. The location of river water sampling is divided into 3 stations (LK1, LK2, and LK3) while for groundwater samples from residential houses is carried out at 6 points, namely 3 points in the northern area of Klampok River (U1, U2, U3) and 3 points in the area south of the Klampok River (S1, S2, S3). Sampling is done in the dry season. From the results of the test of river water quality, pollution that occurs in Klampok river water is categorized as mild-moderate polluted. While the results of groundwater quality testing are still below the quality standards required by Permenkes No. 416 / MENKES / PER / IX / 1990 so that the decline in the water quality of the Klampok river does not affect the quality of groundwater around the river.

Mustofa, Syartinilia, Hadi Susilo Arifin

DAS Katingan merupakan salah satu habitat Orangutan Kalimantan (Pongo pygmaeus wrumbii) yang saat ini berstatus Critically Endangered (IUCN 2016), dilindungi oleh peraturan pemerintah Indonesia (P.106 / 2018), dan termasuk dalam Apendiks 1 (CITES 2017). Kondisi habitat Orangutan Borneo semakin terancam oleh perubahan tutupan lahan. Pengelolaan habitat diperlukan untuk melindungi populasi Orangutan Kalimantan. Tujuan dari penelitian ini adalah membuat model distribusi habitat orangutan kalimantan di DAS Katingan serta memberikan rekomendasi manajemen habitatnya. Model kesesuaian habitat Orangutan Kalimantan menggunakan metode regresi logistik mendapatkan lima variabel lingkungan yang meliputi ketinggian, jarak dari situs budaya, jarak dari jalan, jarak dari pemukiman, dan NDVI. Tes Hosmer-Lemeshow menunjukkan nilai kelayakan sebesar 0.481 dengan Nagelker R2 = 0.866, dan validasi Kappa Accuracy 77%. Total kesesuaian habitat Orangutan Kalimantan di DAS Katingan adalah 1,250,174.35 ha (64.11% dari luas DAS Katingan). Habitat utama Orangutan Borneo teridentifikasi di Taman Nasional (TN), Hutan Lindung (HL), dan Kawasan Suaka Alam/Kawasan Pelestarian Alam (KSA/KPA) dengan luas 395,178.30 ha (31,66% dari total luas habitat). Habitat terisolasi yang diidentifikasi di timur laut DAS Katingan. Manajemen habitat dapat dilakukan dengan membuat koridor dengan lebar minimum 500 meter di areal berhutan.

Skamarokhova A S, Yurina N. A., Bedilo N. A. et al.

On the experimental field an experiment was laid to study the productivity of two types of winter vetch: Hungarian vetch (Vicia pannonica Granz) varieties Orlan and Chernomorskaya and downy vetch (Vicia villosa op Roth) varieties Lugovskaya 2 and Glinkovskaya. The vetch was sown in a mixture with winter wheat (Triticum aestivum L.) variety Tanya. Various doses of mineral fertilizers. Phosphorus (superphosphate) and potassium (potassium chloride) were introduced during sowing, nitrogen (calcium nitrate) – as early spring feeding. As a control, we studied the variety of furry vetch Lugovskaya 2, since this is the most popular variety of winter vetch in the Krasnodar Territory. The soils of the experimental plots are represented by leached, low-humus heavy loamy powerful chernozem. Due to the limited feed intake, the diets of high-yielding cows are rich in highly digestible non-structural carbohydrates (ADF), which fermentation leads to the formation of a large amount of propionic acid in the rumen with a strong acidic effect and, conversely, NDF fermentation is slower and on a smaller scale. The variant winter wheat Tanya + winter vetch Lugovskaya 2 - is closer to the optimum in the second cut. The rest of the experimental options of vetchwheat and vetch-triticale grass mixtures also have a negative fiber balance, which is not acceptable for feeding high-producing dairy cattle.

John K. Wright

Roman Monko

The profession of teacher in Poland, as it follows from the analysis of pedagogical literature, is creative, connected with the fulfillment of a social mission. It requires professional orientation, which is expressed by a certain level of formal education and its improvement in the process of various forms of retraining and advanced training, the presence of a system of various professional competences, motivation. It is of particular importance for future teachers of engineering and computer science! Application of interactive methods in teaching that optimizes the development of their skills, strengthens the creative process and critical thinking, Achieving common goals with other students and educators.

Sohail Ahmad, Felix Creutzig

India’s land transport GHG emissions are small in international comparison, but growing exponentially. Understanding of geographically-specific determinants of GHG emissions is crucial to devise low-carbon sustainable development strategies. However, previous studies on transport patterns have been limited to socio-economic context in linear and stationary settings, and with limited spatial scope. Here, we use a machine learning tool to develop a nested typology that categorizes all 640 Indian districts according to the econometrically identified drivers of their commuting emissions. Results reveal that per capita commuting emissions significantly vary over space, after controlling for socioeconomic characteristics, and are strongly influenced by built environment (e.g. urbanization, and road density), and mobility-related variables (e.g. travel distance and travel modes). The commuting emissions of districts are characterized by unique, place-specific combinations of drivers. We find that income and urbanization are dominant classifiers of commuting emissions, while we explain more fine-grained patterns with mode choice and travel distance. Surprisingly the most urbanized areas with highest population density are also associated with the highest transport GHG emissions, a result that is explained by high car ownership. This result contrasts with insights from OECD countries, where commuting emissions are associated with low-density urban sprawl. Our findings demonstrate that low-carbon commuting in India is best advanced with spatially differentiated strategies.

مرضیه رضوانی, بهروز عبدلی, سید محمد کاظم واعظ موسوی

هدف پژوهش حاضر تعیین تأثیر مهارت‌های روان‌شناختی بر عملکرد ورزشی بازیکنان بود. از هشت تیم لیگ برتر فوتسال تهران در سال 1391، دو تیم به روش نمونه‌گیری تصادفی در گروه‌‌های آزمایشی و کنترل قرار گرفتند. پیش‌آزمون به روش مشاهده (فیلم) و تجزیه و تحلیل براساس چک‌لیست سنجش عملکرد ورزشی تلول و همکاران (2006) از ورزشکاران گرفته شد. برنامة مهارت‌های روان‌شناختی در 30 جلسه به گروه آزمایشی آموزش داده شد که شامل راهبردهای هدف‌گزینی، آرام‌سازی، تصویرسازی، کنترل‌توجه و خودگفتاری بود. پس‌آزمون، بعد از چهار ماه مداخله و آزمون پیگیری، دو ماه بعد برگزار شد. داده‌ها با آزمون یک‌راهة آنکوا بررسی شدند. نتایج نشان داد که تمرین مهارت‌های روان‌شناختی به‌طور معناداری باعث بهبود سطح کیفی اجرا در عملکرد ورزشی پاس، شوت، گرفتن، حفظ و کنترل توپ در بازیکنان فوتسال زن می‌شود و اثر مداخله‌های روان‌شناختی نه‌تنها در پس‌آزمون، بلکه در آزمون پیگیری نیز معنادار است.

F. K. Schaefer

R. Chorley, P. Haggett

O. Kratochvil