Surface area distribution

Part 1 of ebook "Elastic solutions for soil and rock mechanics" provides readers with contents including: Chapter 1 - Fundamental definitions and relationships; Chapter 2 - Basic solutions for concentrated loading; Chapter 3 - Distributed loads on the surface of a semi-infinite mass; Chapter 4 - Distributed loading beneath the surface of a semi-infinite hass; Chapter 5 - Surface loading of a finite layer underlain by a rigid base; Chapter 6 - Surface loading of multi-layer systems; Chapter 7 - Rigid loaded areas;...

204p giangdongdinh 28-05-2024 3 2   Download

This paper aims to provide information about the fractions of cadmium (Cd) and its distribution in surface sediment collected from bivalves harvesting areas in Binh Thuan province (Tuy Phong, Phan Thiet, Lagi). For this purpose, the sediment samples were collected monthly along with these areas in 2015–2016. To analyze the fractions of Cd, a five-step Tessier (1979) sequential extraction process was used, including Fraction 1 (Exchangeable), Fraction 2 (Bound to carbonate), Fraction 3 (Bound to iron-manganese oxide), Fraction 4 (Bound to organic compounds), and Fraction 5 (Residual).

10p dianmotminh02 03-05-2024 5 1   Download

Ebook "Development of an effusive molecular beam apparatus" presents the development of an effusive molecular beam apparatus, which allows the dosing of gases, liquids, and solids in ultra-high vacuum. The apparatus is designed to adsorb precise and reproducible doses to a defined area on metal oxide samples, which is required in Temperature Programmed Desorption and other surface chemistry experiments. The design and the construction of the apparatus is described.

118p tudohanhtau1006 29-03-2024 2 1   Download

This article presents determining the temperature distribution in asphalt pavement in the Hanoi area based on numerical simulation using FEM. Climate data were collected from freely available online data from the Federal Highway Administration of the United States.

16p viengels 25-08-2023 5 3   Download

The quality of the treatment depends largely on the dose calculation in regimen planning. There are some dose calculation methods: (I) Body Surface Area method (BSA), (II) Empiric method, (III) Partition method and (IV) MIRD method.

6p visnape 30-01-2023 7 3   Download

Varto and the surrounding region have important geothermal fields, developing in strike-slip tectonic setting in East Anatolia, which resulted from the collision of the Arabian and Eurasian plates. The main structural elements in the area are the NE-trending sinistral and NW-trending dextral strike-slip fault segments and N-S trending extension zones. In order to determine fault-controlled geothermal circulation, it is very important to fully characterize the structural elements in these complex environments.

20p tanmocphong 29-01-2022 12 2   Download

CeO2–ZrO2-composed NiO and Co3O4 catalysts were prepared by 3 different methods. Both CO methanation and selective CO methanation were carried out. All catalysts were prepared by (1) co-precipitation, (2) surfactantassisted co-precipitation, and (3) surfactant-assisted co-precipitation with ultrasound mixing methods. Catalysts were characterized by using N2 physisorption, XRD, SEM, TEM, and TPR-H2 techniques. The highest surface area value, uniform pore size distribution, and pores having small diameters were observed for the catalysts prepared by using the surfactant and ultrasound.

13p langthannam 29-12-2021 12 0   Download

NiO–Al2O3–ZrO2 and Co3O4–Al2O3–ZrO2 catalysts were prepared by three different co-precipitation methods, namely co-precipitation, surfactant-assisted co-precipitation, and surfactant-assisted co-precipitation with ultrasound mixing methods, and their activities were tested in selective CO methanation. Catalysts were characterized using N2 physisorption, XRD, SEM, TEM, XPS, and TPR-H2 techniques. CO methanation and selective CO methanation reactions were carried out.

13p langthannam 29-12-2021 2 0   Download

In the present study, we successfully prepared two different electrospun polyacrylonitrile (PAN) based-activated carbon nanofiber (ACNF) composites by incorporation of well-distributed Fe2O3 and Co3O4 nanoparticles (NPs). The influence of metal oxide on the structural, morphological, and textural properties of final composites was thoroughly investigated. The results showed that the morphological and textural properties could be easily tuned by changing the metal oxide NPs.

13p tudichquannguyet 29-11-2021 6 1   Download

In particular, heavy polluted streams flow through apatite mining areas such as Ngoi Duong, Ngoi Dum and Chu O. The results of PCA show changes in the distribution of environmental quality parameters in major components by years.In particular, the parameters that contain high information values include COD, BOD5¸ N

9p cothumenhmong9 12-01-2021 12 2   Download

The objective of the study is to avoid temperature cross which is very likely to be occurred in triple-fluid heat exchangers. The temperature cross or temperature meet results in the ineffective surface area in a heat exchanger. Thereby the designer or operator can adjust the design parameters, e.g. geometric parameters of the exchanger, temperatures or fluid flow rates, so that the temperature cross does not occur.

9p trinhthamhodang9 04-12-2020 26 1   Download

Dong Nai Province has abundant surface and groundwater resources. However, in recent years, due to the impact of climate change, there have been unusual changes, hot weather has occurred in the rainy season, rainfall has been distributed. Climate change strongly affects water resources in all aspects: flooding, changing water levels, saline intrusion ... Changes in water resources will affect related areas: changes in exploitation, using and managing, adjusting and changing policies and laws related to water resources.

7p quenchua9 20-11-2020 29 1   Download

The ichthyo-fauna in the Ba Che and Tien Yen rivers, northern Vietnam is highly diverse, with a total of 245 species determined. However, data on the distribution of fish species are not sufficiently provided for the whole area. This study was conducted from 2008 to 2011 at 27 stations from the Ba Che and Tien Yen river basins to determine the distribution of fish species according to different sections of the rivers, water bodies, seasons, and salinity levels.

13p xilank_of 22-07-2020 26 2   Download

An investigation was carried out at College of Agriculture, Shivamogga during the year 2016-17 in order to know the status of potassium in soils under arecanut gardens of Davanagere district, Karnataka. For the study, 200 surface and sub-surface samples were collected from soils under arecanut garden of four taluks (Channagiri, Honnali, Harihara and Davanagere) of Davanagere district.

10p quenchua6 15-06-2020 7 2   Download

Water is one of the most essential commodities for mankind and the largest available source of fresh water lays underground. Tremendous increase in the agricultural, industrial and domestic activities in recent years has increased the demand for good quality water to meet the growing needs. Groundwater is mostly preferred to meet this growing demand because of its lower level of contamination and wider distribution. The occurrence of groundwater is a consequence of the interaction of the climatic, geological, hydrological and physiographical factors.

8p quenchua6 15-06-2020 15 1   Download

The present investigation was carried out at Forest College and Research Institute, Mettupalayam, Tamil Nadu to estimate the extent of variability and association present for seed parameters of Prosopis juliflora Dc. across its natural distribution in south India for further collection of seeds for afforestation or breeding purpose. The study revealed that seed sources from Tuticorin, Rameshwaram, Ramnad and Keezhakarai exhibit significant amount of variability in all the seed characters investigated viz.

8p quenchua4 06-04-2020 14 1   Download

This paper reflects the use of newer technologies Remote Sensing (RS) and Geographical Information System (GIS) which play important role in monitoring canal water distribution and its management, cropping pattern identification and geomorphology characterisation of command area. The conjunctive use of surface and groundwater resources aims to harness maximum quantity of water to achieve optimal utilization of total water resources in a canal command area for maximum agricultural productivity.

9p chauchaungayxua4 18-03-2020 10 0   Download

In this paper, the MnFe2O4/GNPs composite was synthesized by hydrothermal method, in which the mixed-oxide particles were formed in-situ onto the GNPs surface. The purpose of this method is to distribute evenly and avoid the agglomeration of oxide particles, thus increase the surface area so the absorprion process is more effective.

8p abcxyz123_02 03-03-2020 10 0   Download

The experiment was to study the distribution of soil enzyme L-asparaginase in the vegetable growing soils of Ranga Reddy district of Telangana state. since usage of herbicides and pesticides has become inevitable in this area, hence a study was conducted to assess the enzyme activities in the soils. For the assay forty soil samples were collected, which were assayed for enzyme activity and they were correlated with the physico chemical properties of soil. The enzyme L- asparaginase activities of the surface soils expressed as µg of NH4 + released g-1 soil h-1 ranged from 1.4 to 3.

8p caygaocaolon3 27-02-2020 28 0   Download

Drought is an abnormal condition resulting due to a decrease in rainfall. The occurrence of drought is unpredictable and causes unprecedented damage to the production of crop and livelihood. The present study has been conducted to assess the meteorological drought situation in Ujjain district using Effective Drought Index (EDI). For assessment six rain gauge station situated in the study area is selected. Out of which station namely Barnagar, Ghatiya and Tarana have maximum extreme drought event with 8, 7, and 3 respectively.

9p quenchua2 18-12-2019 13 0   Download