Temperature variability analysis

Part 2 of ebook "Creep and hygrothermal effects in concrete structures" provides readers with contents including: Chapter 9 - Solidification theory for aging effect on stiffness and basic creep; Chapter 10 - Microprestress-solidification theory and creep at variable humidity and temperature; Chapter 11 - Physical and statistical justifications of models B3 and B4 and comparisons to other models; Chapter 12 - Effect of cracking and fracture mechanics aspects of creep and shrinkage analysis; Chapter 13 - Temperature effect on water diffusion, hydration rate, creep and shrinkage;...

509p mothoiphong 28-06-2024 2 1   Download

The dehydration of the CPO-27-M (M-MOF-74, M = Zn, Co, Ni, Mg, Mn, Cu) metal-organic framework series has been investigated comprehensively using in situ variable temperature powder X-ray diffraction (VT-PXRD) and thermal analysis (TG) coupled with mass spectrometry (MS).

12p vironald 15-12-2022 7 2   Download

Coral reefs and the services it provide are seriously threatened by ocean acidification and climate change impacts like coral bleaching. Carbon dioxide and sea surface temperature are the two most important variable in connection to coral bleaching events. Understanding effects of the two is empirical in uncovering new information and relationships of bleaching events with local and global environmental properties (SST and CO2).

13p vimegwhitman 10-06-2022 16 1   Download

This study examines how Vietnam’s rice productivity responses to climate change, and estimates the extent to which climate change is influencing Vietnam’s rice productivity by incorporating climatic variables such as temperature, precipitation, storm into regression equations by using panel data from 2006 to 2018 in 19 provinces of Vietnam.

12p visherylsandberg 18-05-2022 11 1   Download

Wet periods are evidenced by dark olive green mixed lithology (sandy, clay, and silts) and high values in MS and log(Sr/Ca). On the other hand, dry periods are associated with light olive green clayey mud lithology and high values in log(Ca/K). We relate the wet periods to negative North Atlantic Oscillation (NAO–) and the dry periods to NAO+. Additionally, all wet periods are related with time of low solar activity and dry periods, except Dalton Minimum, are related with periods of high solar activity.

10p tanmocphong 29-01-2022 10 1   Download

The main aim of this study was to evaluate the efficacy of montmorillonite clay for the adsorption of C.I. Basic Yellow 2 (BY2) dye from aqueous media. The experimental results were processed by response surface methodology based on a central composite design (CCD). The effect of four main variables, including initial BY2 concentration, adsorbent dosage, reaction time, and temperature on the removal of BY2 was evaluated by the model. The accuracy of the model and regression coefficients was appraised by employing analysis of variance.

16p langthannam 29-12-2021 10 1   Download

The temporal and spatial variability of sea surface temperature (SST), sea surface wind and the chlorophyll-a (chl-a) concentration in the Gulf of Tonkin is analyzed based on satellite data for one year 2002. The analysis results indicated that monthly and spatial variations of the chl-a are primarily associated with the monsoonal winds activity and sea surface temperature distributions.

5p viwendy2711 05-10-2021 12 2   Download

The search for optimum design variables is conducted by using a recent heuristic method, namely Grey Wolf Optimizer. During the heuristic search, direct heat conduction problem has to be solved several times. The set of heat transfer parameters that lead to smallest error rate between computed temperature field and reference one is the optimum output of the inverse problem. In order to accelerate the process, the model order reduction technique Proper-Orthogonal-Decomposition (POD) is used.

14p nguaconbaynhay11 07-04-2021 15 3   Download

A study was conducted at tea growing regions of Assam to see the effect of climatic parameter on production of tea. Average production of tea started to diminish from 1992 and the trend had continued upto 2009. However, after 2010 the average production of tea started to increase. Results of correlation and regression analysis showed that except ‘number of rainy days’ other four variables (Temperature Range, Relative Humidity Range, Rainfall and Bright Sun Shine hours) are found to be significant.

7p angicungduoc6 22-07-2020 13 1   Download

Formation of reducing sugars during low temperature storage of red beet is detrimental for processing, consumption as vegetable and easily deteriorated when exposed to high temperatures. Most of the analytical methods are time consuming, cost effective and laborious. So, assessing internal red beet quality through statistical methods is alternative as mathematical modeling does not take error in to consideration. These equations contain few parameters and the storability of the product could be predicted before keeping it for storage based on the dependent parameters.

11p nguaconbaynhay6 24-06-2020 17 1   Download

The main aim of this paper is to determine temperature distribution in a four-stroke, single-cylinder, water cooled, variable compression ratio (3-9), variable speed (2200-3000 rpm) spark ignition engine with brake power of 2.2 kW at a speed of 3000 rpm with copper coated combustion chamber (CCE) [copper-(thickness, 300 μ) was coated on piston crown, inner side of liner and cylinder head] and compared the engine, with conventional combustion chamber (CE) with neat gasoline operation. Copper coated power piston, copp.

8p cleopatrahuynh 01-06-2020 11 0   Download

Climate variability due to fluctuation in temperature is a worldwide concern that imperils crop production. The need to understand how the germplasm variation in major crops can be utilized to aid in discovering and developing breeding lines that can withstand and adapt to temperature fluctuations is more necessary than ever.

15p vihashirama2711 21-05-2020 16 0   Download

The present investigation entitled “Forecast Models of Potato Yield Using Principal Component Analysis for Sultanpur District of Eastern Uttar Pradesh.” Time series data on yield of potato and weekly data from 40th SMW of the previous year to 6th SMW of the following year on five weather variables viz., Minimum Temperature, Maximum Temperature, Relative humidity 08.30hrs, Relative humidity 17.30hrs, and Wind-Velocity covering the period from 1990-91 to 2011-12 have been utilized for development of preharvest forecast model.

6p trinhthamhodang5 16-05-2020 10 0   Download

Wheat genotypes were shown under restricted irrigated condition, based on morphological traits and their genetic variability, correlation coefficient analysis, path coefficient analysis and rank germplasm based on principal component analysis for yield and yield attributing traits. This investigation was carried out with 30 genotypes of wheat using 17 traits viz.

13p nguaconbaynhay5 11-05-2020 17 1   Download

Present investigation was conducted at Dr. YS Parmar University of Horticulture and Forestry, Nauni (HP) to study the effect of changing climatic conditions on seed yield of onion (Allium cepa L.) in mid hills of Himachal Pradesh. The meteorological data (30 years) and onion seed yield data (26 years) were collected; correlation and regression analysis between various weather parameters (temperature, rainfall and relative humidity) and onion seed productivity was done for productivity trend analysis.

11p cothumenhmong4 25-03-2020 13 1   Download

Study was conducted to quantify trend in temperatures, its variability and spatial distribution and its influence on fruit production in north-west India for this purpose more than 30 years data on maximum and minimum temperatures of twenty two different agrometeorological stations of Jammu & Kashmir, Himachal Pradesh, Utrakhand, Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh and Rajasthan were used in this study.

16p cothumenhmong4 23-03-2020 13 1   Download

This work has presented yearly dry and wet seasons in the analysis of 28 years daily recorded temperature, relative humidity and rainfall data from 1988 to 2015 in Rajshahi division, Bangladesh using Hilbert frequency analysis. Analysis has estimated the seasonal boundaries in time according to the instantaneous frequency in cycles/day and the estimations are verified with studying power spectrum of the time series. Two boundaries are obtained in each analysis over the average of yearly analysis of four years.

14p 12120609 22-03-2020 19 2   Download

Cowpea [Vigna unguiculata (L.) walp.]; also known as a black-eyed pea or Southern pea is self-pollinated crop belongs to the family Fabaceae. In this experimentation, thirty accessions were evaluated for eleven agro-morphological traits at agronomy instructional farm, C. P. College of agriculture, S. D. A. U., Sardarkrushinagar under high temperature using randomized block design (RBD) and three replications.

13p chauchaungayxua4 18-03-2020 20 2   Download

The objective of this present study was to obtain optimized conditions for calculating cassava starch properties using response surface methodology (RSM). In this study, BoxBehnken response surface design (BBD) was used to optimize cassava starch properties (3 independent process factors at 3 levels with 17 runs) and to evaluate the main, linear and combined effects of cassava starch extraction conditions. The independent process variables selected in this study were sonication temperature (30, 40, 50°C), sonication time (10, 20, 30 min) and solid-liquid ratio (1:10, 1:20, 1:30 g/ml).

16p caygaocaolon3 27-02-2020 29 2   Download

Coconut has a prolonged reproductive phase of 44 months from the initiation of the inflorescence primordium to full maturity of the nuts. Weather affects all stages of the long development cycle and thus there is likely to be extended predictability based on climate variability. An attempt is being made to relate the coconut sample survey data of Coconut Development Board with climate data of Chanrayapatna taluk of Hassan district. Mean nut yield per palm, per year in the Chanrayapatna taluk was 83.3. Among the villages, Baldare recorded significantly lower nut yield (78.

11p cothumenhmong3 22-02-2020 18 0   Download