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Добірка наукової літератури з теми "Vertical mulch"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Vertical mulch"

1

Pratiwi, Pratiwi, and Narendra Budi Hadi. "ENHANCING THE PRODUCTIVITY OF DEGRADED LAND THROUGH SOIL AND WATER CONSERVATION TECHNIQUE IN CARITA RESEARCH FOREST, WEST JAVA." JOURNAL OF FORESTRY RESEARCH 9, no. 2 (2012): 81–90. https://doi.org/10.20886/ijfr.2012.9.2.81-90.

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Encroachments on Carita Research Forest area have exacerbated the degradation of land due to uncontrolled runoff, erosion and nutrient losses especially on the sloping land with high annual rainfall. To reduce the severity of the degradation the area should be rehabilitated by applying soil and water conservation techniques. The techniques used were the vegetative methods (culture), and a combination of it with mechanical/technical methods. The combination method is expected to be more effective in controlling runoff, erosion and nutrient losses. One important parameter is the efficiency of th

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2

Bristow, KL. "The role of mulch and its architecture in modifying soil temperature." Soil Research 26, no. 2 (1988): 269. http://dx.doi.org/10.1071/sr9880269.

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Both the quantity and architecture of a surface mulch affect its performance in modifying the soil microenvironment. In this paper, temperature under two simple mulch architectures is compared and contrasted with that of bare soil in a tropical environment. In mulch treatments the quantities of mulch per unit area were similar, but elements in one treatment were horizontal (forming a 5 cm layer) while in the other they were vertical (forming a 22 cm layer). Temperatures were recorded for several days as the soil dried following a storm which saturated the mulch and surface soil. The bare soil

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3

Guo, Kai, Mingzhu Cao, Hongguang Yang, et al. "A Preliminary Determination of Mechanical and Suspension Properties of Waste Mulch Film and Cotton Stalk." Agriculture 13, no. 8 (2023): 1572. http://dx.doi.org/10.3390/agriculture13081572.

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In order to provide basic data and a theoretical basis for waste mulch film crushing and separation equipment, the mechanical and suspension properties of waste mulch film and cotton stalk were determined in this study. In the mechanical properties test, the tensile properties of waste mulch film and the shear properties of different parts of cotton stalk were investigated. In the suspension properties test, the suspension properties of different qualities of waste mulch film and different parts of cotton stalk were investigated. The results showed that the average maximum tensile forces and f

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4

Noeralam, A., S. Arsyad, and A. Iswandi. "Effective Technique of Run Off Control on Sloping Upland Farming." Jurnal Ilmu Tanah dan Lingkungan 5, no. 1 (2003): 13–16. http://dx.doi.org/10.29244/jitl.5.1.13-16.

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The aims of this study were to find out the effects of run off control techniques and cropping patterns on run off rateof sloping upland farming. A series of factorial experiments was conducted on a Lithic Dystrudepts located at three differentsloping uplands in Malang, East Java. The area belong to the C type of Did em an climatic zone.The three run off control techniques were soil pit with vertical mulch (TI), soil pit with ridge and vertical mulch (T JJ, and soil pit with ridge (T3)' The two sequential cropping patterns were maize (Zea mays L.) - soybean (Glycine max (L.) Merr.) - maize (PI

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5

Kalisz, P. J., J. W. Stringer, and R. J. Wells. "Vertical Mulching of Trees: Effects on Roots and Water Status." Arboriculture & Urban Forestry 20, no. 3 (1994): 141–45. http://dx.doi.org/10.48044/jauf.1994.026.

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We examined the effect of vertical mulching on root growth and xylem water potential of large sugar maples (Acersaccharum) growing in pastures. Root mass in the 35-40 cm depth of undisturbed soil was about 50% that in the 5-10 cm depth, and root mass at the edge of the canopy (7.5 m from the trunk) was about 40% that found at 1 /4 the distance to the edge of the canopy. After three growing seasons, the abundance of roots in perlite-filled vertical mulch channels (0.6 kg/m3) was significantly (P<0.0001) less than in undisturbed soil 1-2 m away from mulch channels (4.4 kg/m3) and in undisturb

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6

Patten, Kim D., Elizabeth W. Neuendorff, and Stan C. Peters. "Root Distribution of ‘Climax’ Rabbiteye Blueberry as Affected by Mulch and Irrigation Geometry." Journal of the American Society for Horticultural Science 113, no. 5 (1988): 657–61. http://dx.doi.org/10.21273/jashs.113.5.657.

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Abstract We studied the horizontal and vertical root distribution of 3-year-old ‘Climax’ rabbiteye blueberry (Vaccinium ashei Reade) in a sandy loam soil. Root density decreased logarithmically in the horizontal direction from the crown and linearly with depth. Ninety percent of the roots were within 0 to 0.38 m from the crown and 0 to 0.45 m depth. Roots spread more within the rows than across rows. Sawdust mulch increased the radial spread of roots, but did not promote rooting in the top 0.15 m of soil. Compared to one or two drip emitters per plants, low-volume spray emitters increased radi

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7

Percival, Glynn C., Sean Graham, and Emma Franklin. "The Influence of Soil Decompaction and Amendments on Soil Quality." Arboriculture & Urban Forestry 49, no. 4 (2023): 179–89. http://dx.doi.org/10.48044/jauf.2023.012.

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Abstract Urban soil is often compacted during anthropogenic activities, which presents a challenging substrate for tree growth. Two techniques for decompacting soils (air spading and vertical mulching) were evaluated alone and in combination with the soil amendment biochar and/or a woodchip mulch. Effects on soil quality (bulk density, organic matter, vegetation ground cover, cotton strip degradation, root dry mass, and earthworm counts) were monitored over 5 years. A combined treatment of air spading, biochar, and a woodchip mulch layer proved optimal in improving the soil quality of a heavil

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8

Wu, H. X., Yunxin Zhang, Lishu Wang, Dongjuan Chen, and Chao Ma. "Effect of infiltration head on soil water movement of small-diameter tube outflow furrow irrigation under mulch film." World Journal of Engineering 16, no. 2 (2019): 232–37. http://dx.doi.org/10.1108/wje-10-2017-0332.

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PurposeThe purpose of this study is to investigate the effect of different infiltration heads on soil water movement using a free infiltration test for small-diameter tube outflow furrow irrigation under mulch film.Design/methodology/approachThe test consisted of small-diameter tube outflow furrow irrigation under mulch film with three different infiltration heads (3, 4 and 5 cm) and furrow drip irrigation under mulch film using an infiltration head of 4 cm (CK).FindingsDuring irrigation, the accumulated infiltration and migration distance of the wetting front increased with time. During the s

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9

Paul, Priya Lal Chandra, Richard W. Bell, Edward G. Barrett-Lennard, and Enamul Kabir. "Impact of Rice Straw Mulch on Soil Physical Properties, Sunflower Root Distribution and Yield in a Salt-Affected Clay-Textured Soil." Agriculture 11, no. 3 (2021): 264. http://dx.doi.org/10.3390/agriculture11030264.

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Puddling of clay soils for rice transplanting causes a loss of soil structure and vertical shrinkage cracks that are hypothesized to hamper sunflower root growth in the following dry season. To alleviate soil constraints for sunflower root growth and yield, we examined the effects of three levels of mulch and two irrigation regimes in the dry season on a clay-textured soil in the coastal zone of Bangladesh. These treatments were no-mulch, rice straw mulch at 5 t ha−1 and 10 t ha−1, irrigation applied to the field capacity (I1) and a water supply double that of the I1 treatment (I2). The rice s

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Downer, A. J., J. A. Menge, and E. Pond. "Association of Cellulytic Enzyme Activities in Eucalyptus Mulches with Biological Control of Phytophthora cinnamomi." Phytopathology® 91, no. 9 (2001): 847–55. http://dx.doi.org/10.1094/phyto.2001.91.9.847.

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A series of samples were taken from mulched and unmulched trees starting at the surface of mulch or soil to a 15 cm soil depth, forming a vertical transect. Saprophytic fungi isolated from the soil samples on rose bengal medium and surveyed visually were most abundant in mulches and at the interface of mulch and soil (P < 0.05). Microbial activity as assayed by the hydrolysis of fluorescein diacetate was significantly greater in mulch layers than in soils. Cellulase and laminarinase enzyme activities were greatest in upper mulch layers and rapidly decreased in soil layers (P < 0.05). Enz

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Дисертації з теми "Vertical mulch"

1

Zhu, Shaozhen (Sharon), Tahereh S. Ghazaany, Raed A. Abd-Alhameed, et al. "Improved bandwidth low-profile miniaturized multi-arm logarithmic spiral antenna." 2014. http://hdl.handle.net/10454/10834.

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Книги з теми "Vertical mulch"

1

Fell, Derek. Vertical gardening: Grow up, not out, for more vegetables and flowers in much less space. Rodale, 2011.

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2

Kennedy, Jim. Vertical Gardening: The Essential Guide to Build Attractive and Creative Vertical Gardens in Much Less Space. Independently Published, 2021.

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3

Kyne, Rock. Vertical Gardening : Vertical Gardening: Grow up, Not Out, for More Vegetables and Flowers in Much Less Space. Independently Published, 2020.

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4

Gourzong, Richard. Creative Vertical Gardening: The Beginner's Guide to Organic Vegetables and Flowers in Much Less Space. Independently Published, 2020.

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5

Thomas, Danny. Vertical Gardening: A Complete Guide to Growing Flowers, Vegetables and Herbs in Much Less Space. Independently Published, 2020.

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6

Ultimate Vertical Gardening: The Complete Guide to Growing Foods,Herbs,Vegetables and Flowers in Much Less Space. Independently Published, 2020.

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7

Durgin, Frank H., and Zhi Li. Why Do Hills Look So Steep? Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0016.

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This chapter discusses the visual perception of hills. Hills look much steeper than they are. This chapter reviews current knowledge of the phenomenology of slant perception in relation to both functionalist and mechanistic accounts of this perceptual bias. Recent discoveries suggest that this misperception of the geometry of our environment may be related to useful biological information coding strategies with respect to not only slant but also other angular variables relevant to the biological measurement of surface layout. Even in the absence of hills, people misperceive the angular declina

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Caygill, Howard. Judges, Heathscapes, and Hazardous Quarries. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190461454.003.0008.

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The composition of The Trial coincided with Kafka’s writing his most original and challenging contribution to the theory of insurance, “Accident Prevention in Quarries.” The relationship between the pioneering intervention in the field of industrial insurance photo surveillance, written during Kafka’s working day, and his fiction, written at night and during short vacations, is much closer than has been appreciated. This chapter, which goes beyond the setting of the execution of Josef K. in a quarry and the recurrent allusions to photography throughout The Trial, argues that Kafka conceived of

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9

Iammarino, Simona, and Philip McCann. Network Geographies and Geographical Networks: Co-dependence and Co-evolution of Multinational Enterprises and Space. Edited by Gordon L. Clark, Maryann P. Feldman, Meric S. Gertler, and Dariusz Wójcik. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780198755609.013.48.

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The main analytical and multidisciplinary frameworks adopted for understanding the multinational enterprise (MNE) have tended to be largely non-spatial and non-geographical in nature. Although there have been some recent developments incorporating geography into the analysis of the of MNE studies the longstanding and widespread absence of geography in MNE studies leads to analytical problems. In particular, in the investigation of MNE operations and their interactions with different economic actors and contexts, the use of typical dichotomies, such as home versus host, horizontal versus vertic

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Mizuna, A. Kale. Vegetable Gardening for Beginners : Beginners: A Simple, Step-By-step Guide to Grow Fresh and Organic Vegetables at Home All-year Round. Vertical and Raised Bed Gardening, Indoor Edibles, and Much More. Independently Published, 2020.

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Частини книг з теми "Vertical mulch"

1

Brenner, Brian. "Horizontal versus Vertical Construction." In Too Much Information. American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784413944.ch42.

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2

Johnston, Craig M. T., Brad Stennes, and G. Cornelisvan Kooten. "Modeling bilateral forest products trade." In International trade in forest products: lumber trade disputes, models and examples. CABI, 2021. http://dx.doi.org/10.1079/9781789248234.0043.

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Abstract The focus in this chapter is on the development of mathematical programming models used to model bilateral forest products trade. Theoretical outlines are provided of a multi-region, single product trade model and of an integrated, multi-region, multi-product trade model. The objective function and constraints are described mathematically, while the analysis takes into account horizontal and vertical chains and the need to calibrate the model using observed trade flows. Data sources are discussed, and the GAMS code is provided for the uncalibrated and calibrated versions of the model.

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Johnston, Craig M. T., Brad Stennes, and G. Cornelisvan Kooten. "Modeling bilateral forest products trade." In International trade in forest products: lumber trade disputes, models and examples. CABI, 2021. http://dx.doi.org/10.1079/9781789248234.0004.

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Анотація:

Abstract The focus in this chapter is on the development of mathematical programming models used to model bilateral forest products trade. Theoretical outlines are provided of a multi-region, single product trade model and of an integrated, multi-region, multi-product trade model. The objective function and constraints are described mathematically, while the analysis takes into account horizontal and vertical chains and the need to calibrate the model using observed trade flows. Data sources are discussed, and the GAMS code is provided for the uncalibrated and calibrated versions of the model.

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4

Reis, Olaf, Philip Adebahr, Stefan Brandt, et al. "Desiderata: Social Networks and Health Inequalities: Which Questions Remain Open?" In Social Networks and Health Inequalities. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-97722-1_17.

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Abstract“Tell me how much your friends earn, and I’ll tell you if you smoke, what diseases you have and how long your life will be!” With this somewhat pointed statement, we wanted to shed light on the empirically well-confirmed connection between social and health inequalities from the perspective of network research at the beginning of this book (see chapter “Social networks and health inequalities: a new perspective for research”). Social networks are understood here as mediating entities at an intermediate or meso-level, whose structure and function mediate between vertical (income, educat

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5

Kotzen, Benz, Maurício Gustavo Coelho Emerenciano, Navid Moheimani, and Gavin M. Burnell. "Aquaponics: Alternative Types and Approaches." In Aquaponics Food Production Systems. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_12.

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AbstractWhilst aquaponics may be considered in the mid-stage of development, there are a number of allied, novel methods of food production that are aligning alongside aquaponics and also which can be merged with aquaponics to deliver food efficiently and productively. These technologies include algaeponics, aeroponics, aeroaquaponics, maraponics, haloponics, biofloc technology and vertical aquaponics. Although some of these systems have undergone many years of trials and research, in most cases, much more scientific research is required to understand intrinsic processes within the systems, ef

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6

Linder, Wolf, and Sean Mueller. "Federalism." In Swiss Democracy. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63266-3_3.

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AbstractThis chapter focuses on Swiss federalism. Federalism allows the division of power between one central and many regional governments and is therefore a widely used institutional arrangement in multicultural societies. But rather than just focusing on local and regional autonomy and differences, Swiss federalism also allows for collective participation and coming-together for the purpose of joint problem-solving. Federalism thus understood and practised has helped bridge the gap between different cultural communities. In difference to other countries, not so much competition and regional

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7

Song, Yunyun, and Xiaolong Yang. "Design and Finite Element Analysis of Magnetorheological Damper." In Proceeding of 2021 International Conference on Wireless Communications, Networking and Applications. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2456-9_91.

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AbstractIn order to solve the problem that the output damping force of magnetorheological Damper is not large enough and the adjustable range is small, a bypass magnetorheological Damper is designed in this paper. The Valve is connected in a hydraulic cylinder with pipes to form a controllable magnetorheological Damper device. Two structures are designed by adding non-magnetic materials to the structure so that the magnetic field lines pass vertically through the damping gap as much as possible. One is to use two coils and add a non-magnetic material above the coil, and the other is to use onl

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8

Peter, Johannes M. F., and Markus J. Kloker. "Numerical Simulation of Film Cooling in Supersonic Flow." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_5.

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Abstract High-order direct numerical simulations of film cooling by tangentially blowing cool helium at supersonic speeds into a hot turbulent boundary-layer flow of steam (gaseous H2O) at a free stream Mach number of 3.3 are presented. The stagnation temperature of the hot gas is much larger than that of the coolant flow, which is injected from a vertical slot of height s in a backward-facing step. The influence of the coolant mass flow rate is investigated by varying the blowing ratio F or the injection height s at kept cooling-gas temperature and Mach number. A variation of the coolant Mach

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9

Deszczyński, Bartosz. "Validating the Relationship Management Maturity Concept." In Firm Competitive Advantage Through Relationship Management. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67338-3_4.

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AbstractThis chapter operationalizes and tests the preliminary proposal of the RM maturity model in field research. The first section discusses the design of the 40-question questionnaire, which aims to verify the links between RM maturity and sustainable competitive advantage. Different classes of research biases are addressed on a semantic level, and a scoring method based on the Net Promoter Score methodology is introduced. The second section presents the analytical strategy and the design of the empirical test, encompassing the self-reporting of business respondents and machine learning an

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10

Olaniyan, Olumide A., Vincent O. Ajayi, Kamoru A. Lawal, and Ugbah Paul Akeh. "Impact of Moisture Flux and Vertical Wind Shear on Forecasting Extreme Rainfall Events in Nigeria." In African Handbook of Climate Change Adaptation. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_98.

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AbstractThis chapter investigates extreme rainfall events that caused flood during summer months of June–September 2010–2014. The aim is to determine the impact of horizontal moisture flux divergence (HMFD) and vertical wind shear on forecasting extreme rainfall events over Nigeria. Wind divergence and convective available potential energy (CAPE) were also examined to ascertain their threshold values during the events. The data used include rainfall observation from 40 synoptic stations across Nigeria, reanalyzed datasets from ECMWF at 0.125° × 0.125° resolution and the Tropical Rainfall Measu

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Тези доповідей конференцій з теми "Vertical mulch"

1

Scott, Robert, and Gerardo Nunez. "Rotorcraft Cost Too Much - Revisited." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1145.

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The findings of the parametric Harris-Scully cost model, also known as the "Cost Too Much" model, are reviewed and re-examined using an updated database of rotorcraft surveyed from government and commercial sources. The sensitivity of flyaway cost as assessed by the updated model is compared to trends in helicopter design and economic inflation to review the recommendations made by original set of helicopter affordability analysis published between 1995 and 1998.

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2

Kuhn, Alexander, Benjamin Kutz, Tobias Günther, and Andreas Rumpf. "Numerical Examination of a Model Rotor in Brownout Conditions." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9437.

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In the present study a flow simulation of a rotor hovering in ground effect was performed and compared to an experimental study from literature. Different reconstruction schemes in the finite volume flow solver were employed, leading to a computation of second and fifth order accuracy in space. The higher order computation was also performed on different grids with six and 23 million grid cells. The integral simulation values were compared to the experimental results and other literature, showing good agreement. Further on, the vortex conservation of the several schemes was compared. The highe

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3

Swartz, Kenneth. "Canadian Rotors: Evolution of the Canadian Helicopter Industry." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12797.

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This paper tracks the development of the Canadian helicopter industry from its birth to present day highlighting the role that helicopter manufacturers played in the industry's development. Canada has been the home for the world's second largest civil helicopter market for almost seven decades, but the creation of a domestic helicopter manufacturing capability took much longer to achieve. In 2018, there are more than 5,000 Canadian-assembled helicopters flying throughout the world and thousands more helicopters take off every day powered by Canadian made gas turbine engines.

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4

Głodzik, Marcin, Tomasz Gałaczyłski, Aleksander Banaś, Jarosław Sienicki, Konrad Farbaniec, and Radosław Wojtuszewski. "Manufacturing of Thermoplastic Composite Parts with Press Forming Technology." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1362.

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Thermoplastic composites are serious competitor for classic epoxy composites. They have comparable properties to epoxy composites, but characterize much lower processing costs. There are several methods of manufacturing the components from thermoplastic composites. One of the most interesting method in terms of efficiency is thermoforming on a press. This technology allows to product of the aircraft parts such as: ribs, brackets, covers, stiffeners. Thermoplastic composites are resistant to most solvents such as grease, oil and aviation fuel. They are also non-flammable and heat-resistant. Thi

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5

Bechhoefer, Eric, and David He. "Improving Gear Fault Detection by Reducing Tachometer Jitter." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11473.

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Much research has been published on gear fault analysis techniques, almost all based on the time synchronous average (TSA). These include and are not limited to: residual analysis, energy operator, energy ratio, amplitude modulation, frequency modulation, sideband index, zero-order figure of merit, etc. Because the TSA is based on tachometer zero cross times, the performance of these analyses is dependent on the quality of the tachometer data. The tachometer signal always has jitter, due to electrical noise, magnetic noise, or manufacturing spacing error of the tachometer target (e.g. gear too

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6

Greenwood, Eric. "Helicopter Flight Procedures for Community Noise Reduction." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12278.

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A computationally efficient, semiempirical noise model suitable for maneuvering flight noise prediction is used to evaluate the community noise impact of practical variations on several helicopter flight procedures typical of normal operations. Turns, "quick-stops," approaches, climbs, and combinations of these maneuvers are assessed. Relatively small variations in flight procedures are shown to cause significant changes to Sound Exposure Levels over a wide area. Guidelines are developed for helicopter pilots intended to provide effective strategies for reducing the negative effects of helicop

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7

Mettler, Berenice, and Abhishek Verma. "Scaling Effects in Guidance Systems and their Benchmarking: the Agility Scale Ratio." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9678.

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Scaling effects - i.e., the relationship between the aircrafts maneuvering capabilities and the environment scale characteristics - are expected to play an important role in how the performance of a guidance system plays out. These effects are most significant for unmanned aerial vehicles (UAVs) since these vehicles can be built in a much broader range of scales than manned vehicles. This paper investigates how scaling effects should be accounted for in the evaluation of guidance performance. It proposes a non-dimensional quantity call the agility scale ratio (ASR). This quantity is similar to

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8

Spires, James, and Joseph Horn. "High Order Compensator Augmentation of a Baseline Partial Authority Controller for Rotorcraft." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11460.

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An architecture and design methodology for high order compensator (HOC) augmentation of a baseline controller for rotorcraft is presented. With this architecture, the HOC compensator is selectable and can easily be authority-limited, which might ease certification. Also, the plant for this augmentative MIMO compensator design is a stabilized helicopter system, so good flight test data could be safely gathered for more accurate plant identification. The design methodology is carried out twice on an example helicopter model, once with turbulence rejection as the objective, and once with the addi

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Wojtuszewski, Radoslaw, and Aleksander Banas. "Topology Optimization in Additive Manufacturing." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12094.

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One of the many advantages of additive manufacturing is that it doesn't have geometric constraints. It is very common knowledge that additive technology is appropriate to manufacturing parts of very complex shapes, additive manufacturing also gives the designer opportunity to create parts which are optimal in terms of mechanical strength, stiffness, and functionality. For this reason during the design process of components intended to additive manufacturing it is worth using of various shape optimization methods. Methods based on finite element analysis are most prevalent. The connection of ad

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Jr., Jay, and Jeffrey Lewis. "Runway Independent High Speed CarterCopter BizJet." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12301.

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Carter Aviation Technologies, LLC has spent over 20 years developing aircraft concepts utilizing its Slowed Rotor/Compound (SR/C™) technology, a technology that offers VTOL capability with fixed-wing cruise performance in a much simpler and less expensive method than other high speed VTOL approaches, with a rotor always in autorotation in case of emergency. Key to this technology is a rotor and related control system that can be dramatically slowed in flight while remaining stable. Multiple manned demonstrators have demonstrated the feasibility of the technology, as well as provided solid expe

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Звіти організацій з теми "Vertical mulch"

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Moza, Andreea, Florentina Duica, Panagiotis Antoniadis, et al. Outcome of newborns in case of SARS-CoV-2 vertical infection. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.12.0093.

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Review question / Objective: To identify the types and examine the range of available evidence of vertical transmission of SARS-CoV-2 from mother to newborn. To clarify the key concepts and criteria for diagnosis of SARS-CoV-2 vertical infection in neonates. To summarize the existing evidence and advance the awareness on SARS-CoV-2 vertical infection in pregnancy. Background: Severe Acute Respiratory Syndrome Virus 2 (SARS-CoV-2), the virus that causes 2019 coronavirus disease (COVID-19), has been isolated from various tissues and body fluids, including the placenta, amniotic fluid, and umbili

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Grant, Charles. Diaphragm Walls as Permanent Basement Walls in Regions of High Seismicity. Deep Foundations Institute, 2018. http://dx.doi.org/10.37308/cpf-2012-slwl-1.

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Reinforced concrete structural slurry walls have been used in the United States since the early 1960s. The typical practice, and one that makes the economics of slurry walls particularly attractive, is to design the walls to act as both temporary excavation support and permanent basement walls. They often serve as multi-story basements and below grade parking for buildings, for tunnels, subway stations, and other buried structures. One of the early applications was for a foundation for a subway station in San Francisco, but for the most part they have been used more extensively in regions of l

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Smith, S. Jarrell, David W. Perkey, and Kelsey A. Fall. Cohesive Sediment Field Study : James River, Virginia. U.S. Army Engineer Research and Development Center, 2021. http://dx.doi.org/10.21079/11681/41640.

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Estuaries trap much of the fine sediment delivered to them by rivers. This phenomenon presents challenges to the US Army Corps of Engineers (USACE) navigation mission, which maintains navigable waterways for waterborne commerce through estuarine regions. The USACE Regional Sediment Management Program and the USACE Norfolk District are conducting a regional sediment transport modeling study to identify cost-effective sediment management schemes in the James River, a tributary estuary of Chesapeake Bay. A key element of the sediment transport modeling study is the definition of cohesive sediment

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Schartau, Markus, Tronje Peer Kemena, Vanessa Lampe, Jan Taucher, and Miriam Seifert. New/refined parameterizations for modelling ocean alkalinization effects on biogeochemistry and plankton dynamics. OceanNets, 2024. http://dx.doi.org/10.3289/oceannets_d5.8.

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In this report the potential effects of pulsed ocean alkalinity enhancement (OAE) on plankton growth dynamics, efficacy and carbon dioxide removal (CDR) are simulated at an oligotrophic site nearby the Canary Islands (Spain). Parameterizations of how phytoplankton and bacterial growth respond to variations in carbonate chemistry are introduced and applied. The model resolves vertical profiles within a 420 km2 area of OAE, and within a 2.05×105 km2 surrounding region. Both areas are connected and lateral dispersion causes a horizontal exchange of chemical and biological tracers. The analysis co

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Batool, Fizza, Ihsan Yilmaz, and Kainat Shakil. Contest between leaders of the Ummah: Comparing civilizational populisms of PTI and TLP in Pakistan. European Center for Populism Studies (ECPS), 2023. http://dx.doi.org/10.55271/pp0020.

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With the recognition of populism emerging in varied forms across the Global South, the lacuna of research on populism in Asia is gradually filling. Yet, research on populism in Pakistan is still limited and focused mostly on the singular case of former Prime Minister Imran Khan and his political party Pakistan Tahreek-e-Insaaf (PTI). There is much lesser attention to the populism of Tahreek-e-Labbaik Pakistan (TLP), a far-right movement-turned-party. This paper addresses this gap by comparing the two cases of populism in Pakistan – PTI and TLP – to outline the similarities and differences in t

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Briggs, Nicholas E., Robert Bailey Bond, and Jerome F. Hajjar. Cyclic Behavior of Steel Headed Stud Anchors in Concrete-filled Steel Deck Diaphragms through Push-out Tests. Northeastern University. Department of Civil and Environmental Engineering., 2023. http://dx.doi.org/10.17760/d20476962.

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Earthquake disasters in the United States account for $6.1 billion of economic losses each year, much of which is directly linked to infrastructure damage. These natural disasters are unpredictable and represent one of the most difficult design problems in regard to constructing resilient infrastructure. Structural floor and roof diaphragms act as the horizontal portion of the lateral force resisting system (LFRS), distributing the seismically derived inertial loads out from the heavy concrete slabs to the vertical LFRS. Composite concrete-filled steel deck floor and roof diaphragms are ubiqui

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Iselin, Columbus O'Donnell. Summary of bathythermograph observations from the western North Atlantic : October 1940 - December 1941. Woods Hole Oceanographic Institution, 2022. http://dx.doi.org/10.1575/1912/29563.

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The range of submarine detection is frequently limited by the refraction produced by vertical temperature gradients in the superficial layers of the ocean. In order to measure these temperature gradients and thus to permit predictions of the range, the bathythermograph was developed and is now being used on a considerable number of anti-submarine vessels, while a somewhat modified version of the instrument is being tried out on submarines. Some 6675 bathythermograph observations from the western North Atlantic have been examined in order to determine how frequently such observations should be

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8

Briggs, Nicholas E., and Jerome F. Hajjar. Cyclic Seismic Behavior of Concrete-filled Steel Deck Diaphragms. Department of Civil and Environmental Engineering, Northeastern University, 2023. http://dx.doi.org/10.17760/d20593269.

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Анотація:

Earthquake disasters in the United States account for $6.1 billion of economic losses each year, much of which is directly linked to infrastructure damage. These natural disasters are unpredictable and represent one of the most difficult design problems regarding constructing resilient infrastructure. Structural floor and roof diaphragms act as the horizontal portion of the lateral force resisting system (LFRS), distributing the seismically derived inertial loads out from the heavy concrete slabs to the vertical LFRS. Concrete-filled steel deck diaphragms are ubiquitously used in steel constru

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9

Asmare, Fisha, Seid Yimam, and Etsehiwot Semreab. Presumptive Taxation and Equity: Evidence from the Ethiopian Informal Sector. Institute of Development Studies, 2023. http://dx.doi.org/10.19088/ictd.2023.056.

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Presumptive tax has become a popular way of taxing businesses operating in the informal sector across middle- and low-income countries. However, evidence on the unintended effects of presumptive tax systems is scant and the effects themselves are not yet clearly known. Presumptive taxation in general has been much criticised, and public outcry and complaints have emerged due to its alleged unfairness and a lack of clarity in its implementation. The case of Ethiopia is no different. It is expected that a simple imposition of the presumptive tax system to tax the informal sector without consider

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Russo, David, and William A. Jury. Characterization of Preferential Flow in Spatially Variable Unsaturated Field Soils. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7580681.bard.

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Preferential flow appears to be the rule rather than the exception in field soils and should be considered in the quantitative description of solute transport in the unsaturated zone of heterogeneous formations on the field scale. This study focused on both experimental monitoring and computer simulations to identify important features of preferential flow in the natural environment. The specific objectives of this research were: (1) To conduct dye tracing and multiple tracer experiments on undisturbed field plots to reveal information about the flow velocity, spatial prevalence, and time evol

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