scholarly journals Irrigation Scheduling of Maize Grown on a Vertisol Soil Under Changing Climate of Sofia’s Field

2021 ◽  
Vol 24 (s1) ◽  
pp. 1-7
Author(s):  
Maria Ivanova ◽  
Zornitsa Popova
Keyword(s):  
Climate Adaptation ◽  
Irrigation Scheduling ◽  
Irrigation Season ◽  
Present Climate ◽  
Climate Conditions ◽  
The Past ◽  
The Impact ◽  
Very High ◽  
Irrigation Requirements

Abstract The purpose of this study is to evaluate the impact of climate uncertainties on maize irrigation requirements, grown on a Vertisol soil, Sofia’s field, Bulgaria. Through the validated WinIsareg model, four irrigation scheduling alternatives are simulated for the years of “very high“, “high“ and “average“ irrigation demands of past (1952–1984) and present (1970–2004) climate. Adaptation of irrigation scheduling to the present climate conditions during the “very dry“ years (P I ≤12%) consists of an extension of the irrigation season by 15–20 days and a need of additional irrigation relative to alternative 1 and two irrigation events at alternatives 2 and 3. During the past climate alternatives 2 and 3 led to savings of 30 mm of water, while up to the current climate conditions the three irrigations alternatives should provide 360 mm of irrigation water. To obtain maximum yields in “dry“ (P I = 12–30%) years, irrigation season should end by 05/09, as in the present climate, irrigation season has shifted about a week earlier for the three alternatives. In the “average“ (P I = 30–60%) years the adaptation consist in accurately determination of the last allowed date for irrigation.

scholarly journals 'Critical Study Of Konkan Territory Of Maharashtra State w.s.r. To The Concept Of Desha ln Ayurveda'

2021 ◽  
Vol 5 (04) ◽  
Author(s):  
Dr. Pranali A. Nagdeve ◽  
Dr. Ravi k. Golghate
Keyword(s):  
The State ◽  
Critical Study ◽  
Present Climate ◽  
Web Portals ◽  
Research Papers ◽  
Food Treatment ◽  
Climate Conditions ◽  
Etiological Factors ◽  
The Past

Background- Desha Pariksha (examination) has been mentioned in the Charaka Samhita (cha.vi.8/84) which is considered as the oldest and the most authentic treatise of Ayurveda. Ayurveda has described three types of Desha viz. Jangl , Anup and Sadharan. Desha also known as Bhumi refers to the natural  inhabitant of an individual. Desha is one of the factors which have to be assessed in ascertaining the Hetu (etiological factors) and also in deciding the treatment. Climate, diseases, food, treatment and so many factors may vary according to desh (habitat). An attempt has been made to critically analyse the konkan region of the state Maharashtra considering present climate conditions and geography in comparison to the concept of Ayurvedic desha description.  Methods- Authentic government web portals of this region have been visited to know the present climatic situations. Various research papers were also reviewed to discern the territory from other parts of the state.  Conclusion- After scrutinizing the facts over the past few years; it has been found that most of the regions of konkan fall under excess rainfall terrain. Flora and fauna is similar to that of wetland. The Konkan region of the Maharashtra State can be compared with Anup desha in Ayurveda.

scholarly journals EFFECTS OF STANDARD AND MODIFIED GRAVITY ON INTERPLANETARY RANGES

2011 ◽  
Vol 20 (02) ◽  
pp. 181-232 ◽  
Author(s):  
L. IORIO
Keyword(s):  
Initial Conditions ◽  
A Priori ◽  
Earth Planet ◽  
General Relativistic ◽  
Heliocentric Orbits ◽  
Newtonian Constant ◽  
The Impact ◽  
Very High ◽  
Better Than

We numerically investigate the impact on the two-body range of several Newtonian and non-Newtonian dynamical effects for some Earth-planet (Mercury, Venus, Mars, Jupiter, Saturn) pairs, in view of the expected cm-level accuracy in some future planned or proposed interplanetary ranging operations. The general relativistic gravitomagnetic Lense–Thirring effect should be modeled and solved for in future accurate ranging tests of Newtonian and post-Newtonian gravity, because it falls within their measurability domain. It could a priori "imprint" the determination of some of the target parameters of the tests considered. Moreover, the ring of the minor asteroids, Ceres, Pallas, Vesta (and also many other asteroids if Mars is considered) and the trans-Neptunian objects (TNOs) act as sources of nonnegligible systematic uncertainty on the larger gravitoelectric post-Newtonian signals from which it is intended to determine the parameters γ and β of the parametrized post-Newtonian (PPN) formalism with very high precision (several orders of magnitude better than the current 10-4–10-5levels). Also, other putative, nonconventional gravitational effects, like a violation of the strong equivalence principle (SEP), a secular variation of the Newtonian constant of gravitation G, and the Pioneer anomaly, are considered. The presence of a hypothetical, distant planetary-sized body X could be detectable with future high-accuracy planetary ranging. Our analysis can, in principle, be extended to future interplanetary ranging scenarios in which one or more spacecrafts in heliocentric orbits are involved. The impact of fitting the initial conditions, and of the noise in the observations, on the actual detectability of the dynamical signatures investigated, which may be partly absorbed in the estimation process, should be quantitatively addressed in further studies.

scholarly journals Assessing the Impact of Reference Evapotranspiration Models on Decision Support Systems for Irrigation

Horticulturae ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 49 ◽  
Author(s):  
Matthias Olberz ◽  
Katrin Kahlen ◽  
Jana Zinkernagel
Keyword(s):  
Decision Support ◽  
Decision Support Systems ◽  
Support Systems ◽  
Reference Evapotranspiration ◽  
Irrigation Scheduling ◽  
Vegetable Crops ◽  
Crop Water ◽  
Local Climate ◽  
Climate Conditions ◽  
The Impact

Reference evapotranspiration (E T 0) is a major estimator for crop water requirements predicted by decision support systems for irrigation. However, the impact of different E T 0s on the predicted amount of water supply and counts of irrigation events has not been evaluated. Simulations of the Geisenheim Irrigation Scheduling (GS) for vegetable crops with two different E T 0s, P2-E T 0 and FAO56-E T 0, were evaluated to assess exemplarily the impact of E T 0s. The sensitivity of both E T 0s to local climate conditions was characterized through a random forest analysis, and a linear regression model was used to adjust the original GS by adapting K c-values to the exchange E T 0. For assessing the outcomes of GS irrigation decision, simulations of 173 individual cropping cycles including six vegetable crops over eight years were conducted. After adjusting P2-E T 0 K c-values to FAO56-E T 0 K c-values, there was no impact of the E T 0-model on the practical irrigation scheduling with GS. Finally, we discuss that any E T 0-model, if adjusted accordingly, might have little impact on similar irrigation systems and provide a method to exchange E T 0s.

scholarly journals Ground-based astrometry calibrated by Gaia DR1: new perspectives in asteroid orbit determination

2017 ◽  
Vol 607 ◽  
pp. A21 ◽  
Author(s):  
F. Spoto ◽  
P. Tanga ◽  
S. Bouquillon ◽  
J. Desmars ◽  
D. Hestroffer ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Orbit Determination ◽  
The Past ◽  
Data Release ◽  
Impact Risk ◽  
Near Earth Asteroids ◽  
The Impact ◽  
Asteroid Orbit ◽  
Short Arc

Context. The Gaia Data Release 1 (GDR1) is a first, important step on the path of evolution of astrometric accuracy towards a much improved situation. Although asteroids are not present in GDR1, this intermediate release already impacts asteroid astrometry. Aims. Our goal is to investigate how the GDR1 can change the approach to a few typical problems, including the determination of orbits from short-arc astrometry, the exploitation of stellar occultations, and the impact risk assessment. Methods. We employ optimised asteroid orbit determination tools, and study the resulting orbit accuracy and post-fit residuals. For this goal, we use selected ground-based asteroid astrometry, and occultation events observed in the past. All measurements are calibrated by using GDR1 stars. Results. We show that, by adopting GDR1, very short measurement arcs can already provide interesting orbital solutions, capable of correctly identifying near-Earth asteroids (NEAs) and providing a much more accurate risk rating. We also demonstrate that occultations, previously used to derive asteroid size and shapes, now reach a new level of accuracy at which they can be fruitfully used to obtain astrometry at the level of accuracy of Gaia star positions.

scholarly journals HE HARMFUL OF THE HYDROELECTRIC DAMS IN MEKONG RIVER UPSTREAM ON THE ECOSYSTEMS AND LIVELIHOODS IN THE MEKONG DELTA, VIETNAMS

2020 ◽  
Vol 5 (1) ◽  
pp. 35-45
Author(s):  
Ba Le Huy ◽  
Hung Le ◽  
Hoan Nguyen Xuan
Keyword(s):  
Climate Change ◽  
Mekong Delta ◽  
Aquatic Organisms ◽  
Hydroelectric Dams ◽  
Acid Sulfate Soil ◽  
The Past ◽  
The People ◽  
Large Water ◽  
The Impact ◽  
Very High

The hydro-electric of the upstream Mekong (China) has been and will greatly impact on the down-stream areas, in which the Mekong Delta (Viet Nam) is suffering a lot of losses Drought due to water trapped by dams upstream together with Climate Change, Sea Level Rise are present, its impact on Vietnam Mekong Delta and given scenarios for the specialist units to propose. 12 dams in the Chinese division, they accumulate too large water; even causing floods for the people, for many years, causing drought in the downstream, especially the Mekong Delta of Vietnam: drought, lack of water for crops, livestock, for human livelihoods. Alluvium of the river stream is also retained (formerly 160,000,000.00 tons / year, this year, only 80,000,000.00 tons / year, so not only the loss of crop but also erosion of the shoreline and coastline. and saline intrusion, under the impact of climate change is rapidly increasing and very high, in addition, the Sulfate Acidification process also becomes fierce. Characteristics of the ecological system of acid sulfate soil in the Mekong Delta, it contains more than 1.7 million Ha with S content about 1.0-.8%. in normal condition, they are not toxic, but when dry, dehydrated, and air penetrates, they will sulfate acidification very strong, produces highly toxic (Al3+> 3000ppm), kills aquatic organisms and rice, and other agricultural crops. Drought due to water resources by upstream countries, mainly by China, will be increasingly fierce: 6 processes simultaneously occurring in this Ecosystem: 1- Drought, 2: sulfate acidification, 3. Saltwaterization, 4. Lack of alluvium and nutrition, 5- riverbank erosion, sedimentation of estuaries and seaports; and 6 – Coastal landslide (which in the past, accreted to the sea 100m /year, now, in contrast, erosion and sea intrusion 25m/year. Productivity of rice and fisheries has been and will continue to decrease.

scholarly journals Sustainable Hydroelectric Dam Management in the Context of Climate Change: Case of the Taabo Dam in Côte D’Ivoire, West Africa

2019 ◽  
Vol 11 (18) ◽  
pp. 4846 ◽  
Author(s):  
Eric Mensah Mortey ◽  
Kouakou Lazare Kouassi ◽  
Arona Diedhiou ◽  
Sandrine Anquetin ◽  
Mathieu Genoud ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Adaptation ◽  
Sustainability Assessment ◽  
Environmental Indicators ◽  
Assessment Tools ◽  
Climate Regime ◽  
Climate Conditions ◽  
Change Context ◽  
Probability Matrices ◽  
The Impact

Management of hydroelectric dams is an aspect of sustainability that comes with resolving problems locally. The use of global indicators has not been a sustainable solution, thus the need for local indicators. Besides, current sustainability assessment tools lack the integration of climate, making assessments in a climate change context impossible. In this paper, we present management and sustainability assessment in a climate change context using sustainability indicators. We modeled a change in the climate using normal, moderate, and extreme climate conditions defined by Standardized Precipitation Indices (SPI) values. Out of 36 years analyzed, 24 years fall in the near-normal climate regime, and the remaining 12 years in moderate and extreme conditions, making near-normal climate regime the basis for managing the Taabo Dam. The impact of climate, techno-economic, and socio-environmental indicators on sustainability were investigated, and the results were analyzed according to scenarios. Climate adaptation shows higher sustainability indices than techno-economic and socio-environmental scenarios. Probability matrices show high and low values, respectively, for environmental and flooding indicators. Risk matrices, on the other hand, show that even with small probability values, risks still exist, and such small probabilities should not be taken as an absence of risk. The study reveals that sustainability can be improved by integrating climate into existing assessment methods.

scholarly journals The Impact of Household Preparations on the Residues of Pesticides in Selected Agricultural Food Commodities Available in India

1999 ◽  
Vol 82 (3) ◽  
pp. 725-737 ◽  
Author(s):  
Atmakuru Ramesh ◽  
Muthukrishnan Balasubramanian
Keyword(s):  
Organophosphorus Pesticides ◽  
Dietary Intakes ◽  
Green Beans ◽  
Preparation Methods ◽  
Organonitrogen Pesticides ◽  
Food Commodities ◽  
Chennai City ◽  
The Impact ◽  
Very High

Abstract Gas chromatographic multiresidue methods for simultaneous determination of organophosphorus, organochlorine, and organonitrogen pesticides were used to study the exposure of the Indian population to pesticide contamination at their actual dietary intakes. Selected agricultural commodities—5 kinds of vegetables (tomato, potato, okra, cabbage, and green beans), 6 kinds of cereals and pulses (rice, maize, wheat, red gram, black gram, and green gram), and 6 kinds of fruits (mango, orange, guava, banana, apple, and grapes)—readily available in Chennai City local markets—were studied for this purpose. Samples were fortified with known concentrations of various pesticides and subjected to household preparation methods commonly used in India. The impact of household preparation is very high, resulting in 65–95% decontamination of pesticides at different stages. Of 512 raw market samples analyzed, the organo chlorine and organophosphorus pesticides present in 12 samples were removed during household preparations, resulting in residues well below the toxicologically acceptable limits.

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

Fluorescent potentiometric dyes for membrane-potential imaging

1994 ◽  
Vol 52 ◽  
pp. 166-167
Author(s):  
Leslie M. Loew
Keyword(s):  
Membrane Potential ◽  
Single Cells ◽  
Quantitative Imaging ◽  
Optical Recording ◽  
Biological Processes ◽  
Major Focus ◽  
The Past ◽  
Excitable Systems ◽  
Major Application ◽  
The Impact

A major application of potentiometric dyes has been the multisite optical recording of electrical activity in excitable systems. After being championed by L.B. Cohen and his colleagues for the past 20 years, the impact of this technology is rapidly being felt and is spreading to an increasing number of neuroscience laboratories. A second class of experiments involves using dyes to image membrane potential distributions in single cells by digital imaging microscopy - a major focus of this lab. These studies usually do not require the temporal resolution of multisite optical recording, being primarily focussed on slow cell biological processes, and therefore can achieve much higher spatial resolution. We have developed 2 methods for quantitative imaging of membrane potential. One method uses dual wavelength imaging of membrane-staining dyes and the other uses quantitative 3D imaging of a fluorescent lipophilic cation; the dyes used in each case were synthesized for this purpose in this laboratory.

Perceived Burden of Informal Caregivers of a Chronically Ill Older Family Member

GeroPsych ◽  
2011 ◽  
Vol 24 (3) ◽  
pp. 143-154 ◽  
Author(s):  
Elmar Gräßel ◽  
Raffaela Adabbo
Keyword(s):  
Family Member ◽  
Informal Caregiver ◽  
Chronically Ill ◽  
Stress Model ◽  
The Past ◽  
Perceived Burden ◽  
Hypothetical Construct ◽  
Care Situation ◽  
The Impact ◽  
Further Development

The burden of caregivers has been intensively researched for the past 30 years and has resulted in a multitude of individual findings. This review illustrates the significance of the hypothetical construct of perceived burden for the further development and design of the homecare situation. Following explanations regarding the term informal caregiver, we derive the construct burden from its conceptual association with the transactional stress model of Lazarus and Folkman. Once the extent and characteristics of burden have been set forth, we then present the impact of perceived burden as the care situation. The question of predictors of burden will lead into the last section from which implications can be derived for homecare and relief of caregivers.

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