Artículos de revistas sobre el tema "Production of Daikin System (PDS)"
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1
Zhu, Xingyu, Xianhai Meng y Yongqiang Chen. "A NOVEL DECISION-MAKING MODEL FOR SELECTING A CONSTRUCTION PROJECT DELIVERY SYSTEM". JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 26, n.º 7 (9 de julio de 2020): 635–50. http://dx.doi.org/10.3846/jcem.2020.12915.
Resumen
It is crucial for the owner of a construction project to select an appropriate project delivery system (PDS) during early decision-making stages of the project. Due to project uncertainty or a lack of project information, the parameters of a PDS are difficult to measure and quantify. Therefore, there are still major challenges to the objective selection of PDSs. This research proposes a novel systematic decision-making model to select the appropriate PDS by using the combination of case-based reasoning (CBR) and robust nonparametric production frontier method. The Bayesian-Structural Equation Modeling (SEM) supported Z-order-m method is interpreted into the case retrieves process of traditional CBR method in order to eliminate the deteriorative internal and external influence for PDS selection. The case study was based on questionnaire survey conducted in China and used to test the validation of the proposed model. The findings reveal that the systematic decision-making model can overcome some problems of the traditional methods and improve the accuracy of PDS selection. As a result, this research has both theoretical and practical implications for the construction industry.
2
Albers, Albert, Tobias Stürmlinger, Sven Revfi y Kamran Behdinan. "EXTENDED TARGET WEIGHING APPROACH (ETWA): IMPACT AND RISK ANALYSIS OF LIGHTWEIGHT CONCEPTS IN THE PRODUCT-PRODUCTION SYSTEM-CO-DESIGN". Proceedings of the Design Society 1 (27 de julio de 2021): 1537–46. http://dx.doi.org/10.1017/pds.2021.415.
Resumen
AbstractLightweight design in interconnected systems becomes more and more complex as the interdependencies cannot be overseen by the product developer. Varying one component might not only influence the interfaces to other components but also the underlying production systems.Therefore, this contribution focuses on the product/production interdependencies and how they can be supported within lightweight design. Based on a functional description of the product it is possible to derive new lightweight design solutions and also to evaluate the change propagation in the production system. For this, a method for the impact and risk analysis is integrated in the lightweight design method Extended Target Weighing Approach (ETWA). By doing so, a risk value for the adapted production system can be calculated and different design concepts can be compared.The application of the developed method on a simplified use-case shows great potentials when evaluating the impact of a newly developed lightweight design solution on an already existing production system supporting the product development in decision making.
3
Zhou, Peng, Jing Zhang, Juan Liang, Yongli Zhang, Ya Liu y Bei Liu. "Activation of persulfate/copper by hydroxylamine via accelerating the cupric/cuprous redox couple". Water Science and Technology 73, n.º 3 (7 de octubre de 2015): 493–500. http://dx.doi.org/10.2166/wst.2015.509.
Resumen
Cuprous copper [Cu(I)] reacts with sodium persulfate (PDS) to generate sulfate radical SO4−•, but it has been seldom investigated owing to its instability and difficulty in dissolving it. This study proposes a new method to regenerate Cu(I) from cupric copper [Cu(II)] by addition of hydroxylamine (HA) to induce the continuous production of radicals through active PDS, and investigates the resulting enhanced methyl orange (MO) degradation efficiency and mechanism in the new system. HA accelerated the degradation of MO markedly in the pH range from 6.0 to 8.0 in the HA/Cu(II)/PDS process. Both SO4−• and hydroxyl radicals (•OH) were considered as the primary reactive radicals in the process. The MO degradation in the HA/Cu(II)/PDS process can be divided into three stages: the fast stage, the transitory stage, and the low stage. MO degradation was enhanced with increased dosage of PDS. Although high dosage of HA could accelerate the transformation of the Cu(II)/Cu(I) cycle to produce more reactive radicals, excess HA can quench the reactive radicals. This study indicates that through a copper-redox cycling mechanism by HA, the production of SO4−• and •OH can be strongly enhanced, and the effective pH range can be expanded to neutral conditions.
4
Sun, Liang, Dehao Hu, Ziyu Zhang y Xiaoyan Deng. "Oxidative Degradation of Methylene Blue via PDS-Based Advanced Oxidation Process Using Natural Pyrite". International Journal of Environmental Research and Public Health 16, n.º 23 (28 de noviembre de 2019): 4773. http://dx.doi.org/10.3390/ijerph16234773.
Resumen
H2O2- and PDS-based reactions are two typical advanced oxidation processes (AOPs). In this paper, a comparative study of H2O2/PDS-based AOPs employing natural pyrite as a catalyst to degrade methylene blue (MB) was reported. The adaptive pH range in pyrite/PDS extended from 3 to 11, in contrast to the narrow effective pH range of 3–7 in pyrite/H2O2. As a result of the iron leaching, a synergistic effect of both homogeneous and heterogeneous catalysis was observed in pyrite/PDS, whereas heterogeneous catalytic oxidation dominated pyrite/H2O2. Furthermore, the batch results showed that the MB removal by pyrite/PDS was highly dependent on chemical conditions (e.g., pH, pyrite and PDS concentration, temperature). Powerful SO4•− was generated by pyrite rapidly under acidic or weakly acidic conditions, while SO4•− and PDS were assumed by OH− under alkaline condition. The lower pyrite loading (from 0.1 to 0.5 g/L) was affected the removal efficiency obviously, while the scavenging of SO4•− did not seem to be remarkable with the excessive amounts of pyrite (>0.5 g/L). Excessive amounts of PDS (>2 mmol/L) might negatively affect the pyrite/PDS system. The reaction temperature that increased from 20 to 40 °C had a positive effect on the degradation of MB. SEM and XRD showed that the passivation of catalyst did not occur due to the strong acid-production ability of pyrite/PDS, inhibiting the formation of Fe-oxide covering the pyrite surface.
5
Harlé, Honorine, Pascal Le Masson y Benoit Weil. "A MODEL OF CREATIVE HERITAGE FOR INDUSTRY: DESIGNING NEW RULES WHILE PRESERVING THE PRESENT SYSTEM OF RULES". Proceedings of the Design Society 1 (27 de julio de 2021): 141–50. http://dx.doi.org/10.1017/pds.2021.15.
Resumen
AbstractIn industry, there is at once a strong need for innovation and a need to preserve the existing system of production. Thus, although the literature insists on the necessity of the current change toward Industry 4.0, how to implement it remains problematic because the preservation of the factory is at stake. Moreover, the question of the evolution of the system depends on its innovative capability, but it is difficult to understand how a new rule can be designed and implemented in a factory. This tension between preservation and innovation is often explained in the literature as a process of creative destruction. Looking at the problem from another perspective, this article models the factory as a site of creative heritage, enabling creation within tradition, i.e., creating new rules while preserving the system of rules. Two case studies are presented to illustrate the model. The paper shows that design in the factory relies on the ability to validate solutions. To do so, the design process can explore and give new meaning to the existing rules. The role of innovation management is to choose the degree of revision of the rules and to make it possible.
6
Reichwein, Jannik y Eckhard Kirchner. "PART ORIENTATION AND SEPARATION TO REDUCE PROCESS COSTS IN ADDITIVE MANUFACTURING". Proceedings of the Design Society 1 (27 de julio de 2021): 2399–408. http://dx.doi.org/10.1017/pds.2021.501.
Resumen
AbstractAdditive manufacturing offers great potential in geometric design through the layer-by-layer production of components. This is often used in the development of additively manufactured components to make components lighter. An even greater reduction in mass is possible if several components are combined into a more complex component. However, as complexity increases, so do the manufacturing costs, due to a higher demand for supporting structure, reworking and longer production time. Especially for complex components, which make poor use of the space available in the additive manufacturing system, component separation can be a useful way of reducing manufacturing costs. Therefore, a procedure for automated component separation is presented, which determines an optimal cutting plane with respect to the manufacturing costs. The presented procedure is evaluated using two exemplary components where a reduction of manufacturing costs up to 54 % could be achieved.
7
Reeves, D. Wayne, Andrew J. Price y Michael G. Patterson. "Evaluation of Three Winter Cereals for Weed Control in Conservation-Tillage Nontransgenic Cotton". Weed Technology 19, n.º 3 (septiembre de 2005): 731–36. http://dx.doi.org/10.1614/wt-04-245r1.1.
Resumen
The increased use of conservation tillage in cotton production requires that information be developed on the role of cover crops in weed control. Field experiments were conducted from fall 1994 through fall 1997 in Alabama to evaluate three winter cereal cover crops in a high-residue, conservation-tillage, nontransgenic cotton production system. Black oat, rye, and wheat were evaluated for their weed-suppressive characteristics compared to a winter fallow system. Three herbicide systems were used: no herbicide, preemergence (PRE) herbicides alone, and PRE plus postemergence (POST) herbicides. The PRE system consisted of pendimethalin at 1.12 kg ai/ha plus fluometuron at 1.7 kg ai/ha. The PRE plus POST system contained an additional application of fluometuron at 1.12 kg/ha plus DSMA at 1.7 kg ai/ha early POST directed (PDS) and lactofen at 0.2 kg ai/ha plus cyanazine at 0.84 kg ai/ha late PDS. No cover crop was effective in controlling weeds without a herbicide. However, when black oat or rye was used with PRE herbicides, weed control was similar to the PRE plus POST system. Rye and black oat provided more effective weed control than wheat in conservation-tillage cotton. The winter fallow, PRE plus POST input system yielded significantly less cotton in 2 of 3 yr compared to systems that included a winter cover crop. Use of black oat or rye cover crops has the potential to increase cotton productivity and reduce herbicide inputs for nontransgenic cotton grown in the Southeast.
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Jayalath, Theekshana C., George E. Boyhan, Elizabeth L. Little, Robert I. Tate y Suzanne O’Connell. "High Tunnel and Field System Comparison for Spring Organic Lettuce Production in Georgia". HortScience 52, n.º 11 (noviembre de 2017): 1518–24. http://dx.doi.org/10.21273/hortsci12284-17.
Resumen
High tunnels may help mitigate unfavorable climate and weather on lettuce (Lactuca sativa L.) production leading to greater yields and quality, yet information for using these systems in the Southeast region is lacking. This study evaluated the effect of high tunnels and three planting dates (PDs) (early March, late-March, and mid-April) on spring organic lettuce production. A 25% to 36% increase in marketable fresh weight for butterhead and romaine lettuce, respectively, was observed under high tunnels compared with the field in 2016, but there was no difference among the two growing systems in 2015. High tunnel lettuce was harvested ≈2 to 7 days earlier than in the field in 2015 and 2016, respectively. Pest and disease pressure (e.g., Sclerotinia sclerotiorum) as well as the incidence of physiological disorders (i.e., bolting, tip burn, and undersized heads) were similar between the two systems indicating that our high tunnel system did not provide a benefit for these issues. High tunnel air temperatures were ≈3 to 5 °C greater on the coldest mornings and only 1 °C greater on the warmest days compared with the field. Average relative humidity (RH), leaf wetness, and light levels were all lower under the high tunnels. Our results indicate that high tunnels can help increase the production of spring organic lettuce in Georgia, but that the advantage may depend on yearly weather conditions.
9
Jiang, Yihong, JiaPeng Xu, Xiaofei Guan, Uday B. Pal y Soumendra N. Basu. "Production of Silicon by Solid Oxide Membrane-Based Electrolysis Process". MRS Proceedings 1493 (2013): 231–35. http://dx.doi.org/10.1557/opl.2013.33.
Resumen
ABSTRACTThe solid oxide membrane (SOM) electrolysis process has been successfully tested on a laboratory scale to produce silicon directly from silica in a cost-effective and eco-friendly way. A one-end-closed yttria-stabilized zirconia (YSZ) tube was employed to separate a molten salt containing dissolved silica from a liquid metal anode placed inside the YSZ tube. When an applied electric potential between a liquid tin cathode in the molten salt and the anode exceeds the dissociation potential of silica, oxygen ions are transported out of the molten salt through the YSZ membrane and oxidized at the anode while the silicon cations in the flux are reduced to silicon on the surface of the liquid tin cathode. A potentiodynamic scan (PDS) was performed to determine the dissociation potential of silica in the molten salt system. Electrolysis was performed at 1.05 V for 8 hours. The presence of high-purity silicon crystals on the surface of liquid tin cathode was confirmed by scanning electron microscopy (SEM) and electron dispersive X-ray spectroscopy (EDS).
10
Orde, Kaitlyn M., Connor Eaton y Rebecca G. Sideman. "Yield and Soluble Solids Content of Winter-grown Spinach in Unheated High Tunnels in New England". HortScience 53, n.º 5 (mayo de 2018): 638–45. http://dx.doi.org/10.21273/hortsci12956-18.
Resumen
Fall planting of spinach (Spinacia oleracea L.) into high tunnels for harvest from late fall through early spring is widely practiced in the northeastern United States, but replicated studies focusing on this production system are lacking. The objectives of our study were to understand the effect of fall planting date (PD) and cultivar on yield and soluble solids content (SSC) of spinach. Three cultivars (Regiment, Space, and Tyee) were transplanted in unheated high tunnels in Durham, NH, in 2014–15 (Year 1) and 2015–16 (Year 2) at six different fall dates: 20 Sept., 30 Sept., 9 Oct., 19 Oct., 30 Oct., and 9 Nov. Five additional cultivars (Carmel, Corvair, Gazelle, Emperor, and Renegade) were included at the third date (9 Oct.) to compare yield and SSC among cultivars during winter months. A randomized complete block design with four replications was used for all experiments. Year and fall transplant date had a significant effect on total yield. Total yield of Year 2 was nearly double that of Year 1 for all PDs and cultivars. In both years, total yield decreased with later planting, such that yield from the 20 Sept. date was greater than a minimum of three of five subsequent PDs, depending on year. Total yield in spring (January through April) did not differ among the first four PDs in Year 1 or among any dates in Year 2, suggesting that a wide range of PDs will work well for those primarily interested in spring harvests. Combined analyses of the data from both years showed no significant differences in total yield among the eight cultivars planted only on 9 Oct. However, of the three cultivars grown at all PDs, Regiment produced significantly higher yields than Tyee. Harvest date, cultivar, and harvest date × cultivar affected leaf and petiole sap SSC in both years. SSC was most strongly negatively correlated with air and soil temperatures at a 10-day interval in Year 1 (R2 = 0.61 and 0.64, respectively) and a 7-day interval in Year 2 (R2 = 0.78 and 0.69, respectively). ‘Gazelle’ and ‘Emperor’ contained among the highest SSC in both years. Our work demonstrates total yield is highly dependent on fall PD and the growing conditions of a given year.
11
Russell, Jane L. "The Guide Star Selection System and the Guide Star Catalog for Space Telescope". Symposium - International Astronomical Union 109 (1986): 721–27. http://dx.doi.org/10.1017/s007418090007724x.
Resumen
The Guide Star Selection System (GSSS) will provide relative positions of two guide stars and the target for each observation of the Space Telescope as well as photometry for the guide stars. Being developed at the Space Telescope Science Institute, the GSSS is a production system which is based on PDS measurements of Schmidt survey plates. The specified accuracy for the system is +/−0.33 arcsec for the separation of the guide stars and 0.4 mag in the bandpass of the Space Telescope's Fine Guidance Sensors. The GSSS will produce two catalogs which will be used in the operation of the system. The Guide Star Photometry catalog includes photoelectric measurements (+/−0.05 mag) in B and V for six stars over the guide star range, 9.0 to 14.5 visual magnitude, near the central part of each 6 by 6 deg survey plate. The Guide Star Catalog will include the list of all possible guide stars and brighter, positions (at least +/−1 arcsec) and magnitudes (at least +/−0.4 mag) for essentially the whole sky complete to visual magnitude 15.
12
Appasmandri, S. "Analysis of Nutrient Security Prospects in Rural Tamil Nadu: Nutrient Availability, Nutrient Consumption Status and Way to Attain Nutrient Security". Indian Journal of Pure & Applied Biosciences 9, n.º 3 (30 de junio de 2021): 10–22. http://dx.doi.org/10.18782/2582-2845.8679.
Resumen
Among the basic needs of life, food possesses ahead of everyone else as it nourishes us and able to stand which leads further activity. Tamil Nadu state is self-sufficient in food production and Nutrient availability assessment also shows the same but the consumption pattern shows inverse pattern to availability because consumption is directly related with income, education, taste and preference, cultural, ethical and etc. Food consumption patterns of rural Tamil Nadu shows that high demand of Public Distribution System (PDS) observed in earlier and gradually decreased over year. Vitamin Thiamine is coming under severe inequality category in rural areas of Tamil Nadu for both 61st and 68 rounds. Goal programming was effectively optimised the nutrient requirement with least cost and optimised to higher level of nutrient status.
13
Khair, A., MM Alam, AKMA Rahman, MT Islam, A. Azim y EH Chowdhury. "Incidence of reproductive and production diseases of cross-bred dairy cattle in Bangladesh". Bangladesh Journal of Veterinary Medicine 11, n.º 1 (19 de enero de 2014): 31–36. http://dx.doi.org/10.3329/bjvm.v11i1.17730.
Resumen
Reproductive and production disorders (PD) of cross-bred dairy cattle significantly reduce their productivity which is of great concern of dairy producers worldwide because most reproductive disorders adversely affect the future fertility. The present study was conducted to determine the incidence of some reproductive diseases (RD) like abortion, anoestrus, metritis, repeat breeder, retained placenta and one production disease like clinical mastitis in cross-bred dairy cattle in Shahjadpur upazila of Sirajgonj district in Bangladesh. Two hundred fifty (250) farms having at least two cross-bred dairy cattle were randomly selected for this study using an active surveillance system. The study was conducted over a period of twelve months from March 2012 to February 2013. Epidemiological data and samples from diseased cattle were collected and analyzed. The recorded reproductive disorders were diagnosed and treated by the veterinarians on the basis of history, physical examination, clinical and laboratory findings. The incidence rate, cumulative incidence and seasonal incidence of reproductive (RD) and production (PD) disorders were measured. The overall incidence rate and cumulative incidence of RDs and PDs were 33/tcm (10000 cattle-months at risk) and 3.9% respectively. The incidence rate and cumulative incidence of repeat breeder were highest as 11/tcm and 1.29% respectively followed by anoestrus (7/tcm and 0.81%), metritis (3/tcm and 0.34%), retained placenta (2/tcm and 0.27%) and abortion (2/tcm and 0.20%). The incidence rate and cumulative incidence of clinical mastitis were 8/tcm and 1.0% respectively. A decreasing trend of cumulative incidence of mastitis, metritis and abortion was noted from summer, rainy to winter seasons. The cumulative incidence of anoestrus was highest in rainy (0.34%) then summer (0.27%) and lowest in winter (0.21%). The proportionate incidence was highest for repeat breeder (32.76%) followed by mastitis (25.86%) and anoestrus (20.69%). The incidence of the diseases we reported were low in comparison to the published prevalence of these diseases. When the incidence of a disease is low but animals affected have the condition for a long period of time, the prevalence will be high relative to the incidence. Repeat breeder, anoestrus and mastitis should get top priority in reproductive disease research to gain more knowledge and in extension to control them in Bangladesh context. DOI: http://dx.doi.org/10.3329/bjvm.v11i1.17730 Bangl. J. Vet. Med. (2013). 11 (1): 31-36
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Kozhukharov, Stephan V., Christian Girginov, Denitsa Kiradzhiyska, Aleksander Tsanev y Georgy Avdeev. "Evaluation of the electrochemical performance of Ag containing AAO layers after extended exposure to a model corrosive medium". Journal of Electrochemical Science and Engineering 10, n.º 4 (16 de junio de 2020): 317–34. http://dx.doi.org/10.5599/jese.820.
Resumen
The coating procedure appears to be an indispensable finishing stage in the production of Al based industrial products, engineering facilities and equipment. For this reason, there is an ever-increasing interest towards the elaboration of reliable corrosion protective layers with apparent coverage, adhesion, and barrier properties. In this sense, both the formation of anodized aluminum oxide (AAO) layer and its further modification with silver enable the elaboration of advanced (Al-O-Ag) films with extended beneficial characteristics. The present research activities are aimed at the determination of the corrosion protective properties of electrochemically synthesized Al-O-Ag layers on the technically pure AA1050 alloy. The structures and compositions of the obtained Al-O-Ag layers were characterized by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). The research activities were accomplished by means of two independent electrochemical characterization methods: electrochemical impedance spectroscopy (EIS) and potentiodynamic scanning (PDS). The electrochemical measurements were performed after 24, 168 and 672 hours of exposure to 3.5 % NaCl solution used as a model corrosive medium (MCM), in order to determine the barrier properties and durability of the elaborated Al-O-Ag layers. The analysis of the obtained results has undoubtedly shown that the proposed electrochemical Al-O-Ag layer formation can successfully be used for the creation of self-standing layers with apparent corrosion protective properties. Besides, Al-O-Ag system can be used as a basis for development of efficient protective layers suitable for application in biologically contaminated media.
15
Sahoo, Alok Kumar, D. K. Krishna y N. V. Kumbhare. "Effectiveness of the Public Distribution System: A Critical Review". Asian Journal of Agricultural Extension, Economics & Sociology, 26 de febrero de 2019, 1–8. http://dx.doi.org/10.9734/ajaees/2019/v30i130104.
Resumen
Public Distribution System (PDS) started from 1997 for providing essential commodities like rice, wheat, sugar etc. to a large number of people through a network of 5.35 lakh Fair Price Shops (FPS) on a recurring basis at a subsidized price to boost food and nutritional security in India. Whether the PDS is effective to reach targeted people is under serious concern. The problem arises as supply exceeds demand at Minimum Support Price (MSP) of food grains. Over the last 7 years, the average procurement of food grains (rice and wheat) has been around 25 per cent of production. The rising MSP of foodgrains during the last 7 years which enhances the chance of increased subsidy amount given by government resulting increased quantity of food grains procurement and inflation in input prices at constant Central Issue Prices (CIP). Gulati and Saini [1] evaluated under various studies- since 1999-2000 to 2011-12 which narrates about rising leakages of food grains from 9 per cent in 1999-2000 to 36 per cent in 2011-12. In terms of absolute quantity of grains pilfered, of the total quantity of 25.91 MMT pilfered, UP stands at the top with almost 4 MMT (15.3%) pilfered from PDS in 2011-12. There are 39.6 per cent poor having ration cards and 60.4 per cent poor having no cards. There are 26.3 per cent non-poor having ration cards causing inclusion error. The exclusion error is severe as a Type-II error causing 70.5 per cent total in India. There are many loopholes in PDS, leading to ineffectiveness and inefficiency in achieving its objectives. It needs reforms like the transparent selection of beneficiaries, universalization, end to end computerization, more commodities to be included, an effective grievance redressal agency, ADHAAR based PDS, the inclusion of innovative schemes like food coupon, smart card etc. More or less, the innovative mechanism in PDS has to be assessed before implementation to enhance effectiveness and check further error.
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Kaur, Harpreet. "Modelling internet of things driven sustainable food security system". Benchmarking: An International Journal ahead-of-print, ahead-of-print (24 de junio de 2019). http://dx.doi.org/10.1108/bij-12-2018-0431.
Resumen
Purpose The purpose of this paper is to model the sustainable food security system using various technologies driving internet of things (IoT). The right to food is a fundamental right of humans. With increasing population and urbanization, less land is being used for agricultural purposes. In addition, the climate change due to global warming often leads to frequent disasters such as droughts and floods, adversely affecting the food production. This leads to increased levels of poverty and hunger. Ensuring food security has become the prime agenda for all the policymakers and government bodies across the world. With changing global dynamics, traditional ways of ensuring food security will not be sufficient alone. Design/methodology/approach There is a need to develop a sustainable food security system that not only focusses on food production but also equally emphasizes on the efficacy of food distribution and reducing food wastage. In this digital age, the emerging disruptive technologies like Block chain, robotics, big data analytics, and cloud computations, etc., are increasingly changing the functioning of various sectors, giving rise to IoT-based working environment. The policymakers are also exploring these technologies to maximize their outreach so as to benefit the larger set of population and to gain visualization and control over policy implementation using IoT. This paper attempts to model the sustainable food security system using various technologies driving IoT. It also studies the interrelationship among various technologies and their application in various levels of policy implementation. The methodology used in the paper is fuzzy-TISM, which not only provides the causal relationship among two technologies but also provides the magnitude of the cause‒effect relationship and the hierarchical framework for the complex problem. Findings The paper is addressed to the design of sustainable food security system in the Indian context wherein government ensures food security for all, using public distribution system (PDS). Social implications The paper is addressed to the design of sustainable food security system in Indian context wherein government ensures food security for all, using PDS. Originality/value This study is a novel attempt to integrate the IoT into the design of the PDS to ensure food security. The enabling factors for IOT are modelled using Fuzzy-TISM.
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Islam, Shahidul y Varghese Manaloor. "Millets for Food and Nutrition Security in India: Determinants and Policy Implications". Journal of Nutrition and Food Security, 21 de abril de 2021. http://dx.doi.org/10.18502/jnfs.v6i2.6074.
Resumen
Background: Food security has been a target in India since its independence; the primary aim of food security is to ensure enough staple food for the entire population. Although substantial progress was made through the adoption of green revolution (GR) technologies and implementation of the food public distribution system (PDS), desirable food and nutrition security, as defined by the food and agriculture organization (FAO), is far from being realized. This paper scrutinized the potential contribution of millets in achieving food and nutrition security in India.
Methods: The present study was conducted based on the secondary data obtained from FAO Corporate Statistical Database and published literature on food and nutrition security. The impact of the GR technologies and the PDS on food and nutrition security was examined using 58 years of acreage, production, and yield of rice, wheat, and millet, as well as comprehensive information on relevant issues including climate.
Results: Both GR technologies and PDS unduly favored two principal crops, namely rice and wheat, marginalizing all other crops cultivated for thousands of years to meet the food and nutrition requirement of mostly developing countries including India. Millets constitute one such neglected group of crops in India, which have tremendous potential for contributing to food and nutrition security.
Conclusions: Millets are to be included in the PDS alongside rice and wheat so that they receive an appropriate Minimum Price Support. Appropriate implementation of relevant regulations, continued research and development, and adequate support for cultivation and marketing of millets are necessary in this regard.
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Md. Parvis, Abu Reja. "Food Self-Sufficiency and Food Security at the National and Local Level In India." Addaiyan Journal of Arts, Humanities and Social Sciences 6, n.º 1 (5 de septiembre de 2019). http://dx.doi.org/10.36099/ajahss.1.6.1.
Resumen
The Indian planners, right from the beginning, realized the need to attain self-sufficiency in food grains as one of the important goals of planning. The government realized that food surplus countries used their food-surplus as a weapon to force food deficit countries to submit to their dictates. Food security implies access by all people at all times to sufficient of food to lead an active and healthy life. P.V. Srinivasan states that food security requires not just adequate supply of food at the aggregate level but also enough purchasing capacity with the individual/household to demand adequate levels of food. The Ninth Plan discussed the problem of food security at national and at the household level. The Planning Commission states: “An approach to national food security, which relies largely on domestic production of food needed for consumption as well as for building buffer stocks, can be described as a strategy of self-sufficiency.” This strategy emphasized the extension of irrigation facilities and later in the sixties adopted seed-water-fertilizer technology popularly known as Green Revolution. As a consequence of these concerted efforts, India was able to avert famines and acute food scarcities, yet it has not been able to provide food “needed for an active and healthy life” to its population. At the household level, food security implies having physical and economic access to food articles that are adequate in terms of quantity, quality and affordability. This raises the question of prices of food articles and the purchasing power in the hand of population. To help the poor sections, the government introduced the Public Distribution System (PDS) and adopted dual price mechanism. At the PDS outlet, the issue price of food articles was kept lower than the market price to enable the poor to purchase subsidized food, but due to political pressure, the government adopted a universal PDS, rather than a targeted PDS focused on the poor.
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Yang, Jing, Luis San Andrés y Xueliang Lu. "Leakage and Dynamic Force Coefficients of a Pocket Damper Seal Operating Under a Wet Gas Condition: Tests Versus Predictions". Journal of Engineering for Gas Turbines and Power 141, n.º 11 (16 de septiembre de 2019). http://dx.doi.org/10.1115/1.4044307.
Resumen
AbstractHigh-performance centrifugal compressors presently favor pocket damper seals (PDSs) as a choice of secondary flow control element offering a large effective damping coefficient to mitigate rotor subsynchronous whirl motions. Current and upcoming multiple-phase compression systems in subsea production facilities must demonstrate long-term operation and continuous availability, free of harmful rotor instabilities. Plain annular seals and labyrinth (LABY) seals are notoriously bad choices, whereas a PDS, by stopping the circulation of trapped liquid, operates stably. This paper presents experimental and computational fluid dynamics (CFD) results for the leakage and dynamic force coefficients obtained in a dedicated test facility hosting a fully partitioned PDS (FPPDS), four ribbed and with eight pockets per cavity. The test PDS, operating at a rotor speed 5250 rpm (surface speed 35 m/s) and under a supply pressure/discharge pressure ratio up to 3.2, is supplied with a mixture of air and ISO VG 10 oil whose maximum liquid volume fraction (LVF) is 2.2%, equivalent to a liquid mass fraction of 84%. When supplied with just air (dry condition), the measured leakage increases nonlinearly with supply pressure. Under a wet gas condition, the recorded mass flow increases on account of the large difference in density between the liquid and the gas. CFD-derived mass flow rates for both dry and wet gas conditions agree with the measured ones. The test dry gas PDS produces a direct dynamic stiffness (HR) increasing with frequency, whereas the direct damping (C) and cross-coupled dynamic stiffness (hR) coefficients remain relatively constant. The CFD-predicted damping agrees best with the test C albeit overpredicting HR at low excitation frequencies and hR at all frequencies (<175 Hz ∼ twice rotor speed). Under a wet gas condition with LVF = 0.4%, the test force coefficients show great variability over the excitation frequency range; in particular, HR < 0, though growing with frequency due to the large liquid mass fraction. The CFD predictions, on the other hand, produce a dynamic direct stiffness HR > 0 for all frequencies. Both experimental hR and C for the wet gas PDS are larger than their counterparts for the dry gas seal. The CFD-predicted C and hR, wet versus dry, show a modest growth, yet remaining lower than the test data. The CFD-derived flow field for a wet gas condition shows that the seal radial partition walls (ridges) reduce the circumferential flow velocity and liquid accumulation within a pocket. Both the test data and the CFD prediction show that the magnitude of the flexibility function for the PDS test system reduces when the two-component mixture flows through the seal, hence revealing the additional effective damping, more pronounced for the test data rather than that from the predictions. Further work, experimental and CFD based, will continue to advance the technology of wet gas seals while bridging the gap between test data and computational physics model simulations.
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"Nano-structured metal-semiconductor-metal photodetector for sensor network systems". Biomaterials and Tissue Engineering Bulletin 4, n.º 1-4 (11 de agosto de 2017): 50–65. http://dx.doi.org/10.33263/bteb414.050065.
Resumen
The advanced and smart ways to produce complex nano-structures have incorporated new capabilities in various aspects of science and technology where structures on nano-meter scales are desirable including high-speed communication and sensor networks, and future biomedical sensors and detectors. In recent years, there has been a growing interest towards the miniaturization of optical and electrical components with faster and more efficient performance. The development of nano-materials and nano-structures design provides great opportunity for building multifunctional sensing elements which are smaller and more efficiently incorporated. Furthermore they have other useful characteristics like reduced production cost and minimized power consumption. Wireless sensor network systems have been identified as one of the most important technologies for the 21st century (Chong et. al., 2003). It can be deduced from its name that sensor network systems are composed of several sensor nodes, where each component is responsible for a function in the whole system, where it can consist of different kinds of sensors such as, thermal, visual, biomedical, infrared, acoustics, etc. Recent wireless communication system development requires a concurrent speedy advancement of sensors characteristics as well as the system performance. Therefore, it is very important to make the progress in sensors design with tiny dimensions, suitable for communication over a sensor network system with specified purposes such as, monitoring different parameters, namely humidity, temperature, light in household, cities, and different environments (Ian-Akyildiz et al., 2002). The main focus of this review is to design and model an optimized plasmonics-based metal-semiconductor-metal photodetectors (MSM-PDs) with sub-wavelength architectures that is useful for high-speed optical communication systems and sensor network systems. Nano-structures designed on top of the electrodes trigger surface plasmon polaritons (SPPs) excitation and enable routing and manipulation of the light to be eventually trapped into the device active region.
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Hsu, Chen-Tran, Wen-Chi Lee, Yu-Jung Cheng, Yu-Hsuan Yuan, Fu-Hui Wu y Choun-Sea Lin. "Genome Editing and Protoplast Regeneration to Study Plant–Pathogen Interactions in the Model Plant Nicotiana benthamiana". Frontiers in Genome Editing 2 (21 de enero de 2021). http://dx.doi.org/10.3389/fgeed.2020.627803.
Resumen
Biotic diseases cause substantial agricultural losses annually, spurring research into plant pathogens and strategies to mitigate them. Nicotiana benthamiana is a commonly used model plant for studying plant–pathogen interactions because it is host to numerous plant pathogens and because many research tools are available for this species. The clustered regularly interspaced short palindromic repeats (CRISPR) system is one of several powerful tools available for targeted gene editing, a crucial strategy for analyzing gene function. Here, we demonstrate the use of various CRISPR-associated (Cas) proteins for gene editing of N. benthamiana protoplasts, including Staphylococcus aureus Cas9 (SaCas9), Streptococcus pyogenes Cas9 (SpCas9), Francisella novicida Cas12a (FnCas12a), and nCas9-activation-induced cytidine deaminase (nCas9-Target-AID). We successfully mutated Phytoene Desaturase (PDS) and Ethylene Receptor 1 (ETR1) and the disease-associated genes RNA-Dependent RNA Polymerase 6 (RDR6), and Suppressor of Gene Silencing 3 (SGS3), and confirmed that the mutated alleles were transmitted to progeny. sgs3 mutants showed the expected phenotype, including absence of trans-acting siRNA3 (TAS3) siRNA and abundant expression of the GFP reporter. Progeny of both sgs3 and rdr6 null mutants were sterile. Our analysis of the phenotypes of the regenerated progeny indicated that except for the predicted phenotypes, they grew normally, with no unexpected traits. These results confirmed the utility of gene editing followed by protoplast regeneration in N. benthamiana. We also developed a method for in vitro flowering and seed production in N. benthamiana, allowing the regenerants to produce progeny in vitro without environmental constraints.
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Harinarayan, Chittari Venkata, Harinarayan Akhila y Edara Shanthisree. "Modern India and Dietary Calcium Deficiency—Half a Century Nutrition Data—Retrospect–Introspect and the Road Ahead". Frontiers in Endocrinology 12 (6 de abril de 2021). http://dx.doi.org/10.3389/fendo.2021.583654.
Resumen
Calcium and vitamin D are inseparable nutrients required for bone health. In the past half a century, the dietary calcium intake of rural, tribal, and urban India has declined. Though India is the largest producer of milk and cereals, the major source of calcium in India is through non-dairy products. The highest intake of cereals and lowest intake of milk & milk products was observed in rural and tribal subjects whereas, the intake of cereals, milk & milk products were similar in both urban and metropolitan subjects. One of the reasons for lower calcium intake was the proportion of calcium derived from dairy sources. Over the past half a century, the average 30-day consumption of cereals in the rural and urban population has declined by 30%. The Per Capita Cereal Consumption (PCCC)has declined despite sustained raise in Monthly Per capita Consumption Expenditure (MPCE) in both rural and urban households. The cereal consumption was the highest in the lowest income group, despite spending smaller portion of their income, as cereals were supplied through public distribution system (PDS). About 85% of the Indian population are vitamin D deficient despite abundant sunlight. Dietary calcium deficiency can cause secondary vitamin D deficiency. Though India as a nation is the largest producer of milk, there is profound shortage of calcium intake in the diet with all negative consequences on bone health. There is a decline in dietary calcium in the background of upward revision of RDI/RDA. There is a gap in the production-consumption-supply chain with respect to dietary calcium. To achieve a strong bone health across India, it is imperative to have population based strategies addressing different segments including supplementing dietary/supplemental calcium in ICDS, mid-day-meals scheme, public distribution system, educational strategies. Other measures like mass food fortification, biofortification, bioaddition, leveraging digital technologies, investments from corporate sector are some measures which can address this problem. India is a vast country with diverse social, cultural and dietary habits. No single measure can address this problem and requires a multi-pronged strategic approach to tackle the dietary calcium deficiency to achieve strong bone health while solving the problem of nutritional deficiency.