Articoli di riviste: "Central Physical characteristics"

1

Leonel, Magali, Taila Santos de Freitas e Martha Maria Mischan. "Physical characteristics of extruded cassava starch". Scientia Agricola 66, n. 4 (agosto 2009): 486–93. http://dx.doi.org/10.1590/s0103-90162009000400009.

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Considering the importance of cassava starch for Brazilian industries, the current work aimed at evaluating the effects of extrusion parameters on the physical characteristics, mainly viscosity properties of extruded cassava starch. A factorial central composite design (2³) with three independent variables and the response surface methodology were used to evaluate the results of expansion index, specific volume, water absorption index, water solubility index, color and paste properties, according to the variations in the moisture content, barrel temperature and screw speed. Results indicated that barrel temperature influenced the expansion index, specific volume, water absorption index, all the color parameters, the initial viscosity, peak and final viscosity. Feed moisture influenced the specific volume, color parameters, final viscosity and retrogradation. The screw speed had effects on water absorption index, color components as well as on the final viscosity and retrogradation of extruded starch. High moisture, low screw speed and intermediate temperature provided lower starch degradation, which is desirable for pre-cooked starch.

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Almukhtar, Emad, Suhair A. Musa, Shabad Sabri e Nadia Modafar Ali. "Physical and chemical characteristics of the lower reaches of river Diyala, central Iraq". Journal of Environmental Science and Health . Part A: Environmental Science and Engineering 21, n. 6 (agosto 1986): 537–50. http://dx.doi.org/10.1080/10934528609375310.

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Jeffries, Dean S., John R. M. Kelso e Ian K. Morrison. "Physical, Chemical, and Biological Characteristics of the Turkey Lakes Watershed, Central Ontario, Canada". Canadian Journal of Fisheries and Aquatic Sciences 45, S1 (19 dicembre 1988): s3—s13. http://dx.doi.org/10.1139/f88-262.

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The Turkey Lakes Watershed (TLW) in central Ontario was selected for intensive research into the effects of the long-range transport of air pollutants (primarily acidic deposition) at a site on the Canadian Shield having both vulnerable terrain and an undisturbed Great Lakes forest type. The terrestrial and aquatic resources within the basin are representative of the surrounding region of Algoma, although for Ontario, it does have high relief (290 m) and high annual precipitation (>1200 mm). The TLW contains a chain of four lakes (five distinct lake basins) that range from 5.8 to 52.0 ha in area and 2.2 to 12.2 m in mean depth. The lakes are dimictic and, except for the deepest lake, experience dissolved oxygen depletion in undisturbed bottom waters. There is a gradient in the major ion composition of lakes within the TLW, the most dilute waters occurring at high elevations. Calcium levels increase from 55 to 138 μmol∙L−1 down the chain. Sulphate is the dominant lake water anion in the headwater lake, while alkalinity dominates in the lowest lake. Phosphorus is the limiting nutrient in these lakes; NO3-N levels are relatively high (7.9–16.4 μmol∙L−1) because the terrestrial basin exhibits low utilization of this nitrogen species. Seasonal and episodic variations in surface water composition can be large. The headwater lake contains no fish; however, fish communities in the lower three lakes (composed of 8-11 species) are typical of the Algoma region. The distribution of benthic organisms is primarily a function of lake depth and presence/absence of fish rather than variations in water chemistry. Zooplankton species composition is similar across all lakes, and cyanophytes are the dominant algae throughout. The forest is an uneven-aged, mature-to-overmature, old-growth tolerant hardwood stand. The principal tree species is sugar maple (90%) with lesser amounts of other hardwoods (9%, usually yellow birch) and various conifers (1%). Production is typical of forest at this northerly latitude (47°N). Foliar bioelement concentrations are generally similar to those observed at Hubbard Brook, New Hampshire.

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Golub, T., L. Molchanov, S. Semykin e V. Vakulchuk. "STUDY OF THE PHYSICAL CHARACTERISTICS OF STREAMS EMERGING FROM COHERENT-TYPE NOZZLES". Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 2, n. 41 (19 dicembre 2022): 19–25. http://dx.doi.org/10.31319/2519-2884.41.2022.2.

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The main controlling factor in oxygen converting with top blowing is the stream of oxygen, which penetrate the metal bath and promotes the flow of heat, mass exchange and chemical processes. The inherent characteristics of the oxygen jet are created by the nozzle tip with nozzles that may differ in design depending on the issue they solve. In the electrometallurgical industry, coherent nozzles consisting of a central nozzle for supplying the main oxygen jet and a surrounding annular nozzle for supplying shielding gas, mainly methane, are used to ensure deep penetration of the oxygen jet into the melt and to improve the mixing processes of the bath. This design of the nozzle, according to available published data, ensures the elongation of the main jet while preserving its momentum. The paper presents the results of a study using a modified liquid manometer of the features of the action of jets flowing out of nozzles of a coherent type of different designs (the ratio of the outer and central parts of 25%, 50% and 75%) under blowing conditions that correspond to the conditions of top blowing during industrial oxygen conversion. The conducted research made it possible to establish that when the share of the peripheral part is more than 50%, the main controlling link of the jet is the central nozzle, and when the share is smaller, it is the peripheral slotted part. The jets flowing out of the nozzles of the coherent type with the share of the peripheral part more than 50% have a greater force of action on the liquid compared to the force of action of the corresponding central nozzle, by the amount from 33 to 74%relatively. The design of nozzles with a share of the peripheral part of the order of 25% practically does not create conditions for improving the power characteristics of the jet. According to the results of the established conclusions, it is possible to recommend the use of nozzles of the coherent type with a share of the peripheral part of more than 50% as nozzles, for example, of the second row for top blowing lance, which have a slag-forming effect, contributing to better penetration into the melt compared to the corresponding cylindrical ones, that will intensify the processes of mixing and slag formation in the bath

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T. Kamalaja et al.,, T. Kamalaja et al ,. "Physical and Chemical Quality Characteristics of Newly Released Rice Varieties of Central Telangana Zone". International Journal of Agricultural Science and Research 7, n. 4 (2017): 309–12. http://dx.doi.org/10.24247/ijasraug201738.

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KALANGUTKAR, Niyati G., Sridhar D. IYER e Dandaydayudapani ILANGOVAN. "Physical Properties, Morphology and Petrological Characteristics of Pumices from the Central Indian Ocean Basin". Acta Geologica Sinica - English Edition 85, n. 4 (agosto 2011): 826–39. http://dx.doi.org/10.1111/j.1755-6724.2011.00488.x.

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Merello, Manuel, Leonardo Bronfman, Guido Garay, Lars-Åke Nyman, Neal J. Evans II e C. Malcolm Walmsley. "PHYSICAL CHARACTERISTICS OF G331.5-0.1: THE LUMINOUS CENTRAL REGION OF A GIANT MOLECULAR CLOUD". Astrophysical Journal 774, n. 1 (14 agosto 2013): 38. http://dx.doi.org/10.1088/0004-637x/774/1/38.

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Martin, A., T. Mendizabal, J. P. Zaballos e J. Benayas. "Micromorphological, physical, and chemical characteristics of leaching poorly drained flat soils of Central Spain". Arid Soil Research and Rehabilitation 9, n. 2 (aprile 1995): 117–35. http://dx.doi.org/10.1080/15324989509385880.

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O'Connor, W. K., e D. C. Dahlin. "Ore mineralogy and physical characteristics of the Sheep Creek prospect, north-central Alaska Range". Ore Geology Reviews 6, n. 2-3 (maggio 1991): 153–69. http://dx.doi.org/10.1016/0169-1368(91)90019-4.

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10

Zarokanellos, Nikolaos D., Vassilis P. Papadopoulos, Sarantis S. Sofianos e Burton H. Jones. "Physical and biological characteristics of the winter-summer transition in the Central Red Sea". Journal of Geophysical Research: Oceans 122, n. 8 (agosto 2017): 6355–70. http://dx.doi.org/10.1002/2017jc012882.

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11

Tawah, C. L., e J. E. O. Rege. "WHITE FULANI CATTLE OF WEST AND CENTRAL AFRICA". Animal Genetic Resources Information 17 (aprile 1996): 127–45. http://dx.doi.org/10.1017/s101423390000064x.

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SUMMARYThe paper reviews information on the White Fulani cattle under the headings: origin, classification, distribution, population statistics, ecological settings, utility, husbandry practices, physical characteristics, special genetic characteristics, adaptive attributes and performance characteristics. It was concluded that the breed is economically important for several local communities in many West and Central African countries. The population of the breed is substantial. However, introgression from exotic cattle breeds as well as interbreeding with local breeds represent the major threat to the breed. The review identified a lack of programmes to develop the breed as being inimical to its long-term existence.

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12

Müller, Burkhard. "A Multinomial Model to Assess Central Characteristics of Mental Operators". Experimental Psychology 51, n. 3 (giugno 2004): 201–13. http://dx.doi.org/10.1027/1618-3169.51.3.201.

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Abstract. Knowledge about potential operators, about the preconditions of their applicability, and about their effects is essential to interact effectively with the physical world. Four classes of representational units of this knowledge can be distinguished: I) rules, II) structures, III) instances, and IV) episodes. Two important characteristics of these units are the abstractness of content and the directionality of access. A multinomial model is presented that enables the measurement of these characteristics. Three experiments were conducted to validate the parameters of the model. The multinomial model could be fitted very well to the empirical data of each experiment. Moreover, the parameter estimates showed the expected effects. The model allows the investigation of the influence of important variables (for example, knowledge domain, type of instruction, or amount of practice) on characteristics of mental operators without a strong commitment to any specific process theory. Debates regarding the contribution of different kinds of knowledge can be converted into statistical tests of the corresponding model parameters.

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13

Nikolaeva, G. O. "Research on the Physical and Mechanical Characteristics of Stabilized Soil Subgrade of the Central Yakutia". IOP Conference Series: Materials Science and Engineering 1079, n. 2 (1 marzo 2021): 022086. http://dx.doi.org/10.1088/1757-899x/1079/2/022086.

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14

YARILGAÇ, Tarık, Muhammet Ali BALCI, Serkan UZUN e Mehmet Fikret BALTA. "Physical and Some Chemical Characteristics of Loquat Genotypes Selected in Central District in Trabzon Province". Journal of the Institute of Science and Technology 7, n. 1 (24 aprile 2017): 11–15. http://dx.doi.org/10.21597/jist.2017.79.

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15

Kim, Jin Kwan, Min Seok Kim, Dong Yoon Kim e Young Shin Lim. "Evaluation of Changes in the Physical Characteristics of Raindrops Under a Canopy in Central Korea". JOURNAL OF THE GEOMORPHOLOGICAL ASSOCIATION OF KOREA 23, n. 3 (30 settembre 2016): 105–22. http://dx.doi.org/10.16968/jkga.23.3.105.

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16

Bouza, P., H. F. Del Valle e P. A. Imbellone. "Micromorphological, physical, and chemical characteristics of soil crust types of the central Patagonia region, Argentina". Arid Soil Research and Rehabilitation 7, n. 4 (agosto 1993): 355–68. http://dx.doi.org/10.1080/15324989309381368.

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17

Marron, Donna C. "Physical and chemical characteristics of a metal-contaminated overbank deposit, west-central South Dakota, U.S.A." Earth Surface Processes and Landforms 14, n. 5 (agosto 1989): 419–32. http://dx.doi.org/10.1002/esp.3290140507.

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18

Bujnovsky, David, Tomas Maly, Kevin Ford, Dai Sugimoto, Egon Kunzmann, Mikulas Hank e Frantisek Zahalka. "Physical Fitness Characteristics of High-level Youth Football Players: Influence of Playing Position". Sports 7, n. 2 (16 febbraio 2019): 46. http://dx.doi.org/10.3390/sports7020046.

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The aim of this study was to determine whether the speed, agility, aerobic and anaerobic capacities of football players varied by playing positions. Elite youth football players (n = 123, age = 15.7 ± 0.5 years) who played in six different positions, as goalkeepers (GK), full backs (FB), central defenders (CD), wide midfielders (WM), central midfielders (CM), and attackers (AT), were assessed. Multivariate analysis of variances was used to compare the following variables: Linear running sprint for 5 m (S5) and 10 m (S10), flying sprint for 20 m (F20), agility 505 test with turn on the dominant (A505D) and non-dominant leg (A505N), agility K-test, Yo-Yo intermittent recovery (YYIR1) test and repeat sprint ability (RSA) test. The results showed significant influence of playing positions on linear-running sprint performance (F1,123 = 6.19, p < 0.01, ηp2 = 0.23). Midfielders reached significantly higher performance levels (CM = 2.44 ± 0.08 s, WM = 2.47 ± 0.13 s) in the A505N test compared to GK (2.61 ± 0.23 s). Outfield players had significantly higher performance in both YYIR1 and RSA tests compared to GK (p < 0.01). The results of this study may provide insightful strategies for coaches and clinical practitioners for developing position-specific conditioning programs.

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Rożek-Piechura, Krystyna, Zofia Ignasiak, Monika Kurzaj, Teresa Sławinska, Anna Skrzek, Sławomir Kozieł e Robert M. Malina. "Silesians in Texas and Upper Silesia: anthropometric, functional and physical activity characteristics". Anthropological Review 83, n. 3 (1 settembre 2020): 261–77. http://dx.doi.org/10.2478/anre-2020-0018.

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AbstractAnthropometric, functional and physical activity characteristics of contemporary adult descendants of Upper Silesian immigrants to Texas in the mid-19th century and current residents in Upper Silesia were compared. The sample included 45 residents in Central Texas, 25 women and 20 men, and 36 residents in rural Upper Silesia, 24 women and 12 men, 54-76 years of age. Variables included selected demographic characteristics, anthropometry, estimated body composition, several physiological indicators, strength and functional fitness, and physical activity. Sex-specific MANCOVA and Chi square were used for comparisons. Descendants of Silesian immigrants to Texas were taller, on average, while differences in other anthropometric variables were variable. All residents in Silesia and the majority of descendants of Silesian migrants to Texas were overweight or obese. Differences in hemodynamic and respiratory functions and responses to a 6-minute walk were inconsistent, while none of the fitness variables differed significantly between the samples. Although residents in Upper Silesia were significantly more physically active descendants of Silesians in Texas, >80% of the men and women in both samples scored below the criterion-reference standard for the maintenance of physical independence in the 6-minute walk.

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Fredriksson, David W., James D. Irish, M. Robinson Swift e Barbaros Celikkol. "The Heave Response of a Central Spar Fish Cage". Journal of Offshore Mechanics and Arctic Engineering 125, n. 4 (1 ottobre 2003): 242–48. http://dx.doi.org/10.1115/1.1600471.

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As the aquaculture industry considers moving into the open ocean, understanding the dynamic response of fish containment structures becomes critical. Identification of possible resonant conditions and motion characteristics is necessary for system structural integrity and maximizing fish survivability. In this study, heave (vertical motion) free release tests of a central spar fish cage were conducted using a combination of physical and finite-element (FE) models and field observations. These tests were performed to investigate the added mass, damping and natural period characteristics of the system in the vertical direction. The test results were analyzed considering both linear and nonlinear damping. The comparison of these tests show that: the damped natural period of this fish cage is longer than 20 seconds; the numerical model underestimates the damping and the cage oscillates longer and at a higher frequency than observed with the field tests; and the physical model is nearly critically damped near equilibrium due to Reynolds number effects at the model scale.

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Kolovelonis, Athanasios, Evdoxia Samara, Nikolaos Digelidis e Marios Goudas. "Elementary Students’ Perceptions of Cognitively Challenging Physical Activity Games in Physical Education". Children 9, n. 11 (12 novembre 2022): 1738. http://dx.doi.org/10.3390/children9111738.

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This study examined 10–11-year-old students’ perceptions regarding three different types of physical activity games based on different principles of mental engagement (contextual interference, mental control, or discovery). A total of 156 students (84 girls) from five fourth-grade (75 students) and five fifth-grade (81 students) classes of five elementary schools located in a middle-sized city in central Greece participated in the study. These students participated in a larger project consisting of a series of acute experiments aiming to examine the effectiveness of cognitively challenging physical activity games in elementary physical education. Students responded to open-ended questions regarding their perceptions of the physical activity games. Their responses were analyzed through a thematic analysis. A total number of 706 quotes were identified and categorized into the lower-order themes which were organized into four higher-order themes: (a) characteristics of the games, (b) effects of the games, (c) areas for improvement, and (d) preferences for specific games. Students’ views provided supporting evidence regarding the employment of cognitively challenging physical activity games in physical education. Useful insights regarding the characteristics of the games, their effects, and their areas for improvement were also gained.

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Jiangmin, Du, Zhang Xiaoli, Yu Yanqiu, Huang Kaiwei, Guo Hongguang, Zhong Gaorun, Yu Bowei e Zhao Yuanyuan. "Lacustrine Carbonate Reservoir Characteristics Research of Jurassic Da’anzhai Member in North Central Sichuan Basin". Open Petroleum Engineering Journal 8, n. 1 (10 settembre 2015): 398–404. http://dx.doi.org/10.2174/1874834101508010398.

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Based on both macroscopic and microscopic characteristics of cores from Lower Jurassic Da’anzhai Member in north central Sichuan Basin, and combined with physical property data, a detail study has been conducted, which includes reservoir characteristics such as lithologic characters, physical properties, and reservoir space types, and control factors of reservoir development. The study suggests that, there are two typical kinds of reservoirs: crystalline shell limestone and argillaceous shell limestone. The reservoirs properties are poor with ultra-low porosity and low permeability, which can be significantly improved by fractures. Reservoir space type is pore-fracture, mainly constitutive of the micro-fractures accompanied by dissolved pores. The reservoir development is controlled by sedimentation, diagenesis and tectogenesis together. Shell beach and lacustrine slop are the favorable facies for reservoir development. Dissolution is the primary constructive diagenesis to improve reservoir porosity and permeability. Structural fractures are necessary for reservoir effectiveness and high production.

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Zhang, Saile, Qingzhen Yang, Rui Wang, Xufei Wang e Haoqi Yang. "Integrated Optimization of Aerodynamic and Electromagnetic Characteristics for Nozzle Central Cone". Journal of Physics: Conference Series 2235, n. 1 (1 maggio 2022): 012039. http://dx.doi.org/10.1088/1742-6596/2235/1/012039.

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Abstract With the development and enhancement of anti-stealth technology and airborne radar, fighter jets will increasingly be threatened by the detection of airborne radar and ground-based radar. The exhaust system is a major radar scattering source in the backward direction of the aircraft due to its large open-ended property. A Radial-Based Function Neural Network Multi-Objective Particle Swarm Optimization (RBFNN-MOPSO) method is presented to reduce the nozzle’s radar cross section (RCS). Considering the geometric constraints and aerodynamic characteristics of the nozzle, 21 nozzle models with different types of cones are established by using uniform design (UD). The electromagnetic scattering characteristics of all the nozzles are simulated by Forward-Backward Iterative Physical Optics (FBIPO) method, and the Computational Fluid Dynamics (CFD) simulations have been conducted to obtain the flow field in the nozzle. After comprehensive evaluation and design by RBFNN-MOPSO, the mean value of RCS and thrust coefficient of the model have achieved good results. The process of optimization and design is proved to be effective and efficient for nozzle aerodynamic/electromagnetic integrated stealth design.

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Asadollah, Teimouri Yansari. "Physically effectiveness of beet pulp in dairy cows 1: physical characteristics, ruminal kinetics of nutrients degradation, hydration, and functional specific gravity". Proceedings of the British Society of Animal Science 2007 (aprile 2007): 215. http://dx.doi.org/10.1017/s1752756200021189.

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Some physical properties including particle size, functional specific gravity (FSG; Teimouri Yansari et al., 2004), hydration rate, water holding capacity (WHC) and ionion-cation exchange (Van Soest, 1994) influenced on physically effective factor (pef), but only particle size measurement is central to all effective fibre systems. The objective of this study was to evaluate the effects of three types of beet pulp (BP) on physical characteristics including bulk density, particle size, kinetics of hydration, FSG, WHC, and intrinsic osmotic pressure that measured usingin vitroandin situmethods.

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Diamantis, K., S. Bellas, G. Migiros e E. Gartzos. "Correlating Wave Velocities with Physical, Mechanical Properties and Petrographic Characteristics of Peridotites from the Central Greece". Geotechnical and Geological Engineering 29, n. 6 (2 agosto 2011): 1049–62. http://dx.doi.org/10.1007/s10706-011-9436-7.

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Gauthier, David A., e Richard F. Farnell. "Comparison of caribou physical characteristics from Yukon and neighboring caribou herds". Rangifer 6, n. 2 (1 giugno 1986): 131. http://dx.doi.org/10.7557/2.6.2.637.

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Data on seven external body measurements of caribou from six woodland and two barren-ground caribou herds from Yukon, Alaska, Alberta and British Columbia were compared. Comparisons between females in the fall and winter and mature males in the fall revealed that (1) barren-ground Porcupine caribou were consistently smaller than caribou from other herds, (2) British Columbia and Alberta caribou tended to be larger than Yukon caribou, or the Alaskan caribou studied, (3) central Yukon caribou were intermediate in body size, (4) no difference was found between Yukon «mountain» and «woodland» type caribou in body size, and (5) the barren-ground Fortymile caribou were more similar in physical characteristics to Yukon woodland or mountain caribou than to those of the barren-ground Porcupine herd. These data support Banfield's (1961) view of a gradient of decreasing physical size from the northern British Columbia — Alberta herds through the Yukon mountain or woodland herds to the northern barren-ground herds.

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Setyawan, Rudi, Anggoro Cahyo Sukartiko e Mochammad Maksum Machfoedz. "Characterization of Physical and Chemical Quality of Selected Indonesian Rice based on Geographical Origin". KnE Life Sciences 4, n. 2 (1 marzo 2018): 28. http://dx.doi.org/10.18502/kls.v4i2.1654.

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Local rice with typical quality characteristics that linked strongly with its geographical origin needs to be promoted as geographical indication products for marketing and legal protection purposes. Characterization of both physical and chemical quality parameters, therefore, need to be studied. A local rice variety called ‘Rojolele’ and the other rice variety for comparison purposes was collected from different regions in Central Java province and determined their quality parameters. The results then were tested with ANOVA. Rice quality characteristic differences among various geographical origins were observed and discussed in this paper. Keywords: Geographical Indication; Quality; Rice; Rojolele

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JAIN, ASIT, DEEPTI K. BARWA, MOHAN SINGH, KISHORE MUKHERJEE, TRIPTI JAIN, M. S. TANTIA, K. N. RAJA e ARJAVA SHARMA. "Physical characteristics of Kosali breed of cattle in its native tract". Indian Journal of Animal Sciences 88, n. 12 (28 dicembre 2018): 1362–65. http://dx.doi.org/10.56093/ijans.v88i12.85762.

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Kosali, the first breed of cattle from Chhattisgarh, was registered as 36th breed. Characterization is essential to guide decision-making in livestock development and breeding programmes. Hence, a survey was carried out to characterize the Kosali breed of cattle in Central Plain Region of Chhattisgarh state. The coat colour of most animals was red followed by white and black. Mostly muzzles, tail switch, eyelashes, and hooves were black in colour. Body size, hump, dewlap, naval flap, penis sheath flap, udder and teats were small in size. Horns were stumpy, small and slightly inward and ears were horizontal. The estimated average live weight of adult female and male were 168.7±2.82 and 212.5±3.8 kg, respectively. The mean linear measurements of female vs male Kosali cattle were height at wither (99.79±2.76 vs 103.4±2.11 cm), body length (96.56±1.87 vs 99.89±2.32 cm) and chest girth (119.98±1.98 vs 137.12±2.8 cm). Kosali cattle are smaller in size and are well adapted to the existing agroclimatic conditions of the region. Appropriate breeding strategies and conservation models should be designed for overall improvement of this breed.

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Cardoso, Raema Fortes Vicente, Émerson Loli Garcia, Ezequiel Lopes do Carmo, Martha Maria Mischan e Magali Leonel. "Physical characteristics of potato flour from 'Ibituaçú' cv. under different extrusion parameters". Ciência Rural 45, n. 12 (dicembre 2015): 2245–51. http://dx.doi.org/10.1590/0103-8478cr20141538.

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ABSTRACT: This study aimed to evaluate potato flour from 'Ibituaçú' cultivar as raw material for extrudates. Potato flour was processed in a single-screw extruder following central composite rotational design for three factors, being considered as independent parameters: temperature in the third zone, humidity and screw speed. The products obtained were characterized by expansion index (EI), specific volume (SV), water solubility index (WSI), water absorption index (WAI), hardness (H), color (L*, a* and b*). Results showed an effect of the independent parameters on the extruded physical characteristics. The parameters varied from: 3.22 to 5.47 (EI); 2.08 to 11.23 mL g-1 (SV), 32.88 to 63.72% (WSI), 4.02 to 8.97 g gel g-1 (WAI), 7.54 to 29.85 kgf (H), 53.89 to 68.72 (L*), 5.59 to 6.92 (a*), 16.6 to 22.6 (b*). It was concluded that expanded products with desired physical characteristics are obtained at high temperature; low humidity and intermediate screw speed.

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Plotko, P., e B. Hnatyk. "Vela supernova remnant and its pulsar wind nedula: physical characteristics and radio emission". Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, n. 58 (2018): 36–41. http://dx.doi.org/10.17721/btsnua.2018.58.36-41.

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Vela Supernova remnant (SNR) is one of the nearest SNRs to Earth and serves as a space laboratory of relativistic and pulsar astrophysics. In particular, its synchrotron radio emission is determined by physical processes both in the remnant and in pulsar wind nebula (PWN), that resides in central part of remnant. In our work we separate the total radio flux from Vela SNR on fluxes from remnant and from PWN. It is shown that flux from the remnant is detected in MHz- range and is generated in the whole volume of remnant with uniform emissivity, while as flux from PWN is detected in MHz-GHz range and is generated in the spherically symmetric volume of PWN (MHz halo component) and in two additional sources: Northern and Southern pulsar wings (MHz-GHz wings).

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Diamantis, Konstantinos, George Exarhakos, George Migiros e Efthimios Gartzos. "Evaluating the Triaxial Characteristics of Ultamafic Rocks from Central Greece Using the Physical, Dynamic and Mechanical Properties". OALib 03, n. 12 (2016): 1–20. http://dx.doi.org/10.4236/oalib.1103214.

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Shin, S.-H., e Y.-B. Park. "Effects of changes in the physical properties of the central elastic artery on haemodynamic characteristics during ageing". Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 223, n. 5 (4 marzo 2009): 525–35. http://dx.doi.org/10.1243/09544119jeim502.

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Lisovenko, А. V., O. L. Zakharova e G. Yu Yamskikh. "ACOUSTIC CHARACTERISTICS OF ABAKAN". Bulletin of Udmurt University. Series Biology. Earth Sciences 29, n. 4 (25 dicembre 2019): 471–78. http://dx.doi.org/10.35634/2412-9518-2019-29-4-471-478.

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This article assesses the acoustic pollution of Abakan, which belongs to the category of large cities. Significant excess, according to the results of research, reaching 110 dB(A), occurs pointwise along highways and is observed in the central part of the city where the railway tracks run. Excesses on these sites are recorded twice as high as the normative indicator which is equal 55 dB(A). Building sites located in the northern, western and southwestern city districts should be considered as problematic areas in terms of extra acoustic load. Within these areas, the noise load reaches 65 dB(A). In northern and southern residential areas of Abakan, the noise level corresponds to the acoustic comfort mode. Additional noise measurements made in mid- and multi-storey residential areas of the city showed that the highest noise level is observed in winter period and reaches 68,8 dB(A). In summer, the noise level does not exceed the standard adopted for this physical factor.

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Katashinskaya, L., L. Gubanova, E. Ermakova, A. Kadyseva e I. Tsalikova. "DYNAMICS OF PSYCHOPHYSIOLOGICAL CHARACTERISTICS AND PHYSICAL FITNESS OF THE PHYSICAL EDUCATION FACULTY STUDENTS AT THE PEDAGOGICAL UNIVERSITY". Human Sport Medicine 19, n. 4 (21 gennaio 2020): 29–36. http://dx.doi.org/10.14529/hsm190404.

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Aim. The purpose of the article is to compare the change in psychophysiological indicators and physical fitness of students majoring in physical education and life safety at the beginning and end of their studies. Materials and methods. The study followed university students through the first year to the fifth year of study, 28 of them are boys, 14 girls. To assess the psychophysiological indicators, the latent period of simple and complex visual motor responses was measured. Physical fitness was measured with the help of strength indicators, endurance, flexibility and the level of development of coordination abilities. Results. At the end of the experiment, the positive dynamics of physical fitness of students was noted. Students were characterized by an average and above average level of physical fitness. At the beginning of the experiment, boys demonstrated a higher level of development of physical qualities than girls, with the exception of flexibility and static endurance. At the beginning of the experiment, girls were below the average level of development of coordination abilities (Romberg test) and strength index. At the end of the experiment, the level of strength among students was above the average and high. The development of endurance, flexibility, and dexterity increased significantly. At the end of the experiment, the indicators of SVMR and CVMR among the PE faculty students decreased significantly, which indicated the optimization of activation of the central nervous system. Conclusion. The results obtained during monitoring confirm the effectiveness of educational programs at the physical education faculty, which resulted in the positive dynamics of the psychophysiological characteristics and physical fitness of graduates.

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Yang, Shou Yin, Chih Yung Wu e Kun Ho Chen. "The Physical Characteristics of Bio-Oil from Fast Pyrolysis of Rice Straw". Advanced Materials Research 328-330 (settembre 2011): 881–86. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.881.

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Rice straw is one of the main renewable energy sources in central and south Taiwan. In this study, bio-oil was produced from rice straw using a bench-scale plant that included a fluidized bed, a char removal system, and an oil collection system using an oil-recycling spray condenser. We investigated the effects of pyrolysis temperature and carrier gas flow rate on the distribution of products and on the properties of the bio-oil obtained. Experiments were conducted at reactor temperatures of 350–500 °C with carrier gas flow rates of 7.5–15 L/min and a feed rate of 1 kg/h. The results indicated that the optimum reaction temperature and carrier gas flow rate for the production of bio-oil were 450 °C and 10 L/min, respectively. The highest percentage of bio-oil in the products in these experiments was 41.3 wt%. The pH value of the bio-oil was ~4.1 and the viscosity was ~9 cSt (at 25 °C), depending on the storage time, temperature, and char content. This study establishes the operating parameters of a biomass fast pyrolysis system and provides some properties of rice straw bio-oil relevant to storage and use.

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Kim, Jae Wook, e Duck Joo Lee. "Implementation of Boundary Conditions for Optimized High-Order Compact Schemes". Journal of Computational Acoustics 05, n. 02 (giugno 1997): 177–91. http://dx.doi.org/10.1142/s0218396x97000113.

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The optimized high-order compact (OHOC) finite difference schemes, proposed as central schemes are used for aeroacoustic computations on interior nodes. On near-boundary nodes, accurate non-central or one-sided compact schemes are formulated and developed in this paper for general computations in domains with non-periodic boundaries. The near-boundary non-central compact schemes are optimized in the wavenumber domain by using Fourier error analysis. Analytic optimization methods are devised to minimize the dispersion and dissipation errors, and to obtain maximum resolution characteristics of the near-boundary compact schemes. With the accurate near-boundary schemes, the feasibility of implementing physical boundary conditions for the OHOC schemes are investigated to provide high-quality wave solutions. Characteristics-based boundary conditions and the free-field impedance conditions are used as the physical boundary conditions for direct computations of linear and nonlinear wave propagation and radiation. It is shown that the OHOC schemes present accurate wave solutions by using the optimized near-boundary compact schemes and the physical boundary conditions.

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Hassaballa, Deena, e Richard L. Harvey. "Central pain syndromes". NeuroRehabilitation 47, n. 3 (13 novembre 2020): 285–97. http://dx.doi.org/10.3233/nre-208003.

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The management of pain in persons with neurological injuries is challenging and complex. A holistic view and clinical approach are necessary when addressing pain in patients with neurological impairment because interpreting signs and symptoms and deciphering sources of pain is never a straightforward process. This problem is further magnified with the management of central pain syndromes. The best approach is to have a good understanding of the clinical characteristics commonly found in this patient population, in particular for patients with stroke, multiple sclerosis (MS), or spinal cord injury (SCI), as central pain manifests differently between these groups. This paper will focus on the history, clinical presentation, pathophysiology, assessment, and treatment of central pain in patients with these types of neurological conditions. In addition to being at risk for a decline in quality of life, patients with pain syndromes are also prone to adverse responses to treatments (e.g., opioid addiction). It is therefore important to methodically analyze the similarities and differences between patients with different pain syndromes.

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Zakonnov, V. V., V. A. Gusakov, L. E. Sigareva e N. A. Timofeeva. "Physical and chemical properties of bottom sediments in surface waters of Central and South Vietnam". Водные ресурсы 46, n. 1 (15 gennaio 2019): 82–90. http://dx.doi.org/10.31857/s0321-059646182-90.

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In this study, physical and chemical characteristics of bottom sediments in inland waters of Central and Southern Vietnam were investigated, initially according to granulometric compositions, organic matter contents, bulk densities, and natural moisture contents. The main types of sediments in rivers, lakes, reservoirs, former quarries, and ponds were then identified, and similarities between of physical and chemical properties were identified between bottom sediments from water bodies of Vietnam and those from the Volga cascade reservoirs. Moreover, we show common dependencies in the formation of bottom sediments in reservoirs from humid, arid, and tropical monsoon climates.

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Junara, Nunik, Sugeng Triyadi e Bambang Setia Budi. "COMPARATIVE STUDIES IN RELIGIOUS SPATIAL PHYSICAL CHARACTERISTICS IN KAMPUNG KAUMAN MALANG, SURAKARTA, AND PEKALONGAN". Journal of Islamic Architecture 5, n. 3 (1 luglio 2019): 145–50. http://dx.doi.org/10.18860/jia.v5i3.4384.

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Kampung Kauman is a representation of Muslim settlements in Indonesia, particularly in Java. The existence of Kampung Kauman in the central district provides its influence over the conditions of the agreement. This study aims to explore the patterns used by the community in efforts to realize the values of Islam in their settlement. Kampung Kauman in Surakarta, Malang, and Pekalongan are selected as part of the similar cities with its dynamics and development. This background of the formation of them has also become one of the considerations. The methodology was a case study, which researchers sought to compare three object regions in the same case. The case was a pattern of the physical characteristics of the settlement. This study shows the differences in religious activities and spatial physic character.

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Polyakov, Vyacheslav, Alexey Petrov e Evgeny Abakumov. "Micromorphological Characteristics of Fallow, Pyrogenic, Arable Soils of Central Part of Yakutia". Soil Systems 6, n. 3 (15 agosto 2022): 68. http://dx.doi.org/10.3390/soilsystems6030068.

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The assessment of the micromorphological characteristics of soils is a powerful tool for studying the transformation of soils under the influence of various weathering mechanisms (physical, biogenic). The central part of Yakutia is characterized by a large area of agricultural lands, some of which has become fallow land and is subject to cryogenic processes, fires and anthropogenic impact. Under the conditions of climate change, the fallow soils of Yakutia can be re-involved in the agricultural complex. To study their state, a method of micromorphological investigation of thin soil sections is proposed. Thin sections of soils were analyzed using a polarizing microscope Leica DM750P. As a result of the work, zonal, fallow, pyrogenic and agricultural soils of the central part of Yakutia were analyzed. The soils were found to be in a degraded state. Zonal soils were characterized by the presence of quartz grains, feldspar, and undecomposed plant tissue, as well as biogenically transformed humus. Fallow soils were characterized by a thick organo-mineral (A) horizon, quartz grains, feldspar, and silty-clay plasma. Pyrogenic soils have differences from natural and fallow soils; as a result of fires and active illuviation of organo-mineral substances. The Anthrosol soils were characterized by a large number of aggregates of various sizes. In their composition there were various minerals, such as quartz, feldspar and mica. The signs of soil cryogenesis were noted only in the underlying horizons (B), while the upper horizon (A) had no signs of cryogenic transformation.

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Bobuľská, Lenka, Dagmar Macková, Radovan Malina e Lenka Demková. "Occurrence and dynamics of Impatiens parviflora depending on various environmental conditions in the protected areas in Slovakia". European Journal of Ecology 2, n. 1 (1 giugno 2016): 87–94. http://dx.doi.org/10.1515/eje-2016-0010.

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Abstract Biological invasion as one of the main threats to natural ecosystems has big economic impact on conservation of nature. Studies of the population biology of invasive species may allow more precise focus on specific plant and soil characteristics involved in invasiveness. The aim of the study was to investigate the relationship between selected biological population characteristics of Impatiens parviflora and a few chosen chemical and physical soil features. Sites were selected because of the poor mapping of invasive plants in the protected natural areas and their interactions with specific soil characteristics. Research on I. parviflora was realised during a vegetation season in three forest nature reserves in Prešov district, Slovakia. Some population biological characteristics of I. parviflora as one of the most invasive plant species in Slovakia and Central Europe were surveyed. The correlation between the numbers of plants was analysed, as well as select population biological characteristics of I. parviflora (plant height, width of the largest leaf and the number of flowers/fruits) on some select chemical and physical soil attributes (soil pH, bulk density, porosity and soil moisture) were analysed. The results suggest that biological characteristics of I. parviflora in three different microhabitats – a meadow (a habitat without tree vegetation), a habitat close to the stumps and a habitat under dense tree vegetation seemed to influence the selected soil parameters. Our results showed that I. parviflora prefers acidic and non-compacted soil conditions. Sunlight and soil moisture do not show statistically significant differences on any biological characteristic of the population. The results also suggest that the autecology of I. parviflora in Western and Central Europe is not very well known and deserves further study.

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Miardini, Arina, e Pranatasari Dyah Susanti. "Analysis Physical Characteristics of Land for Estimated Runoff Coefficient as Flood Control Effort in Comal Watershed, Central Java". Forum Geografi 30, n. 1 (3 agosto 2016): 58. http://dx.doi.org/10.23917/forgeo.v30i1.1131.

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Watershed conditions in Indonesia have been degraded over time, which is marked by increasing area of critical land. The vast area of critical land was evidenced to be a serious threat for watershed carrying capacity which eventually affected the hydrology imbalance in the watershed area. One among watershed with degraded lands which seriously requires priority handling is Comal watershed. The purpose of this study is to identify the physical characteristics of Comal watershed which have significant influence in determining the runoff and calculating the runoff coefficient by taking into account the parameters of watershed’s physical characteristics. The method used in this analysis is Cook method, which is done through the estimation of runoff coefficient by evaluating the parameters of slope, infiltration, vegetation cover, and drainage density. The unit of analysis in this study is land mapping unit. Results of the four parameters are classified and the classification is done so that the scores of the runoff coefficient are figured out, while the peak discharge determination is performed by using the Rational method. The analysis showed that runoff coefficient of Comal watershed is 61.63%, which can be categorized as high. The runoff coefficients and peak discharge calculations of each sub watershed, respectively, Comal Hilir of 52.65% with peak discharge 505.68 m3/sec, Genteng of 65.04% with peak discharge 542.44 m3/sec, Lomeneng of 64.00% with peak discharge 194.23 m3/sec, Srengseng of 64.10% with peak discharge 270.46 m3/sec, and Wakung Hulu of 62.34% with peak discharge 686.64 m3/ sec. The most influential runoff coefficient factors are, respectively, infiltration rate, slope, vegetation cover, and drainage density. Flood control priority in Comal watershed should be preoccupied to increase the infiltration rate through a combination of three conservation techniques of mechanical, vegetative, and biology.

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Lu, Xin, Feiyue Mao, Zengxin Pan, Wei Gong, Wei Wang, Liqiao Tian e Shenghui Fang. "Three-Dimensional Physical and Optical Characteristics of Aerosols over Central China from Long-Term CALIPSO and HYSPLIT Data". Remote Sensing 10, n. 2 (18 febbraio 2018): 314. http://dx.doi.org/10.3390/rs10020314.

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Kahlon, Meharban Singh, Rattan Lal e Merrie Ann-Varughese. "Twenty two years of tillage and mulching impacts on soil physical characteristics and carbon sequestration in Central Ohio". Soil and Tillage Research 126 (gennaio 2013): 151–58. http://dx.doi.org/10.1016/j.still.2012.08.001.

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Gul'ko, V. M., N. F. Kolomiets, B. V. Mikhailenko, A. E. Shikanov e K. I. Yakovlev. "Physical characteristics of a heavy hydrogen ion source based on a coaxial discharge system with central filament anode". Soviet Physics Journal 33, n. 9 (settembre 1990): 730–33. http://dx.doi.org/10.1007/bf00894890.

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Suroto, Suroto. "PEMANFAATAN ROTAN NON KOMERSIAL SEBAGAI BAHAN BAKU MEBEL DITINJAU DARI SIFAT FISIS DAN MEKANIS". Jurnal Riset Industri Hasil Hutan 3, n. 1 (1 giugno 2011): 1. http://dx.doi.org/10.24111/jrihh.v3i1.1181.

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Rattan in good quality is curently difficult to obtain and it price is quite expensive. So, it is needed to utilize non commercial rattan as substitute material. By identification of basic characteristics , such as phisical, mechanical, chemical and anatomy structure, every species of non commercial rattan can be used appropriately. The objectives of this research is to optimize utilization non commercial rattan as subtitute material and develop rattan manufacturing industry especially by identivication of the physical and mechanical characteristics. Five (5) rattan species studied here are marau (Calamus mettanensis Becc), toho (Calamus spp), galang (Daemonorops verticilaris Griff Mart), hijau (Calamus spp. and simpurut (Calamus panajuga Becc) whic derived from central Kalimantan. The research result based on physical characteristic rang for diameter is between 6,2 – 27,2 mm, inter-segment length 10 – 28 cm, moisture content 12,50 – 16,48 % and density 1,03 – 1,61 gr/cm3. While mechanical characteristics range for modulus of elasticity is between 364,03 – 1934,29 kg/cm2, compression strenth 127,55 – 441,04 kg/cm2 and tensile strength 197,34 – 394,20 kg/cm2. Those rattan species can be optimized as craft industry raw material especialy for furniture and rattan matting.Keywords: rattans, physical, mechanical, craft.

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Guo, Bin, Yi Bian, Lin Pei, Xiaowei Zhu, Dingming Zhang, Wencai Zhang, Xianan Guo e Qiuji Chen. "Identifying Population Hollowing Out Regions and Their Dynamic Characteristics across Central China". Sustainability 14, n. 16 (9 agosto 2022): 9815. http://dx.doi.org/10.3390/su14169815.

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Continuous urbanization and industrialization lead to plenty of rural residents migrating to cities for a living, which seriously accelerated the population hollowing issues. This generated series of social issues, including residential estate idle and numerous vigorous laborers migrating from undeveloped rural areas to wealthy cities and towns. Quantitatively determining the population hollowing characteristic is the priority task of realizing rural revitalization. However, the traditional field investigation methods have obvious deficiencies in describing socio-economic phenomena, especially population hollowing, due to weak efficiency and low accuracy. Here, this paper conceives a novel scheme for representing population hollowing levels and exploring the spatiotemporal dynamic of population hollowing. The nighttime light images were introduced to identify the potential hollowing areas by using the nightlight decreasing trend analysis. In addition, the entropy weight approach was adopted to construct an index for evaluating the population hollowing level based on statistical datasets at the political boundary scale. Moreover, we comprehensively incorporated physical and anthropic factors to simulate the population hollowing level via random forest (RF) at a grid-scale, and the validation was conducted to evaluate the simulation results. Some findings were achieved. The population hollowing phenomenon decreasing gradually was mainly distributed in rural areas, especially in the north of the study area. The RF model demonstrated the best accuracy with relatively higher R2 (Mean = 0.615) compared with the multiple linear regression (MLR) and the geographically weighted regression (GWR). The population hollowing degree of the grid-scale was consistent with the results of the township scale. The population hollowing degree represented an obvious trend that decreased in the north but increased in the south during 2016–2020 and exhibited a significant reduction trend across the entire study area during 2019–2020. The present study supplies a novel perspective for detecting population hollowing and provides scientific support and a first-hand dataset for rural revitalization.

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Nieczuja-Dwojacka, Joanna, Beata Borowska, Agata Janiszewska e Sławomir Kozieł. "Socioeconomic factors and lifestyle affecting the variability of menstrual cycle characteristics in women from Central Poland". Anthropological Review 82, n. 4 (1 dicembre 2019): 327–38. http://dx.doi.org/10.2478/anre-2019-0024.

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Abstract Regularity, length of the cycle and duration of menstrual flow are a reflection of women health. The purpose of the research was to assess the relationships between socioeconomic status, cycle length, duration of menses, regularity and dysmenorrhea. A survey was conducted among 896 healthy women from Łódź and Warsaw (Poland), aged 15.71–26.98. Women who were menarche at least 3 years ago were asked to complete the survey. Women were asked about cycle length (number of days), duration of menstrual flow, regularity of the cycle, dysmenorrhea, birth place, parental education level, attendance at physical education classes, participation in additional sports activities, self-assessment of stress levels at home and at school/university, and smoking. For data analysis, t-test, analysis of variance, and chi-square were used, and p<0.05 was considered to be statistically significant. There were no significant relationships between the mean cycle length, regularity and the environmental factors, except for differences in the average length of the menstrual cycle in women from Łódź who attend additional sports activities. Women who are more physically active are characterized by a shorter menstrual cycle. In terms of the length of the menstrual flow, daughters of better educated fathers were characterized by longer menses. In contrast, dysmenorrhea was associated with longer menstrual periods and longer menstrual bleeding, as well as with higher levels of stress, both at home and at school. Environmental factors affected the features of menstruation cycles in women from Central Poland.

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Egorov, Yaroslav, e Victor Fainshtein. "Kinematic characteristics of stealth CME in three-dimensional space". Solar-Terrestrial Physics 8, n. 3 (30 settembre 2022): 13–21. http://dx.doi.org/10.12737/stp-83202202.

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We have studied and compared kinematic characteristics of the motion of coronal mass ejections (CMEs) in three-dimensional (3D) space for three groups of CMEs for the period 2008–2014. These CME groups include: (i) stealth CMEs, (ii) CMEs that originate on the visible side of the Sun (for an observer on Earth) and are associated with X-ray flares and filament eruption, (iii) all CMEs registered during the given period. Stealth CMEs are CMEs that emerge on the visible side of the Sun and are unrelated to X-ray flares, as well as to filament eruption. We compare kinematic and some physical characteristics of these CMEs with those of a separate group of CMEs, classified as stealth in [D’Huys et al., 2014]. After comparing the characteristics of the three CME groups (i)–(iii), we concluded that stealth CMEs have, on average, the lowest velocity, kinetic energy, mass and angular size, central position angle, and also the angle φ between the direction of CME motion in the ecliptic plane and the Sun–Earth line and the angle λ between the direction of CME motion in 3D space and the ecliptic plane. We also discuss distributions of CMEs of different types by kinematic characteristics.

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Sadiana, Darmaji, Komang Gde Suastika, Heri Suyanto, Gunarjo,. "Characterization of Amethysts from Sukamara, Central Kalimantan, Using Laser-Induced Breakdown Spectroscopy (LIBS)". Journal of the Physical Society of Indonesia 1, n. 2 (27 gennaio 2020): 5–8. http://dx.doi.org/10.35895/jpsi.v1i1.8.

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Abstract - Laser-Induced Breakdown Spectroscopy (LIBS) is one method of atomic emission spectroscopy using laser ablation as an energy source. This method is used to characterize the type of amethysts that originally come from Sukamara, Central Kalimantan. The result of amethyst characterization can be used as a reference for claiming the natural wealth of the amethyst. The amethyst samples are directly taken from the amethyst mining field in the District Gem Amethyst and consist of four color variations: white, black, yellow, and purple. These samples were analyzed by LIBS, using laser energy of 120 mJ, delay time detection of 2 μs and accumulation of 3, with and without cleaning. The purpose of this study is to determine emission spectra characteristics, contained elements, and physical characteristics of each amethyst sample. The spectra show that the amethyst samples contain some elements such as Al, Ca, K, Fe, Gd, Ba, Si, Be, H, O, N, Cl and Pu with various emission intensities. The value of emission intensity corresponds to concentration of element in the sample. Hence, the characteristics of the amethysts are based on their concentration value. The element with the highest concentration in all samples is Si, which is related to the chemical formula of SiO2. The element with the lowest concentration in all samples is Ca that is found in black and yellow amethysts. The emission intensity of Fe element can distinguish between white, purple, and yellow amethyst. If Fe emission intensity is very low, it indicates yellow sample. Thus, we may conclude that LIBS is a method that can be used to characterize the amethyst samples.Key words: amethyst, impurity, laser-induced, breakdown spectroscopy, characteristic, gemstones

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