Field research on depth distribution of normal stresses in the mass of sand base of the strip foundations with beam elements

10.12737/3383 ◽  
2014 ◽  
Vol 2 (1) ◽  
pp. 13-16
Author(s):  
Дмитрий Архипов ◽  
Dmitriy Arkhipov ◽  
Сергей Евтушенко ◽  
Sergey Evtushenko
Keyword(s):  
Depth Distribution ◽  
Field Research ◽  
Normal Stresses ◽  
Beam Elements ◽  
Foundation Model ◽  
Foundation Base ◽  
Sand Base ◽  
Base Diagrams

The article presents the results of the field research on depth distribution of normal stresses in the mass of sand base in the transverse alignment of the foundation model with variable geometric shape of the foundation base. Diagrams of the distribution of normal stresses are constructed on the results of the experiments being held, and presence of the arching phenomenon in the gap between the extended elements of the foundation being confirmed.

Field research on distribution of vertical stresses and deformations in the sand base of the strip foundations with beam elements

10.12737/3384 ◽  
2014 ◽  
Vol 2 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Дмитрий Архипов ◽  
Dmitriy Arkhipov ◽  
Сергей Евтушенко ◽  
Sergey Evtushenko
Keyword(s):  
Field Research ◽  
Vertical Axis ◽  
Normal Stresses ◽  
Strip Foundation ◽  
Arch Height ◽  
Strain Behavior ◽  
Beam Elements ◽  
Foundation Model ◽  
Foundation Base ◽  
Sand Base

The article presents the results of the field research on distribution of normal stresses and relative deformations in the sand base along the vertical axis in the gap between the extended beam elements of strip foundation model with variable geometric shape of the foundation base. In the field research of Stress-Strain Behavior (SSB) of the subfoundation of strip foundation model based on beam elements, it is found that the height of the soil curved arch occurring between the extended elements of the foundation base, increases during loading and when approaching the ultimate loading the experimental value of the arch height tends to the theoretical value defined by the formula proposed by M.M. Protodyakonov.

Field research of a wedge-shaped core on the models of the strip foundations with variable geometric shape

10.12737/3382 ◽  
2014 ◽  
Vol 2 (1) ◽  
pp. 9-12
Author(s):  
Дмитрий Архипов ◽  
Dmitriy Arkhipov ◽  
Сергей Евтушенко ◽  
Sergey Evtushenko ◽  
Геннадий Скибин ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Natural Extension ◽  
Field Research ◽  
Strip Foundation ◽  
Foundation Model ◽  
Foundation Base ◽  
Solid Part ◽  
Sand Base ◽  
Core Base ◽  
Soil Area

Many authors noted in the field research on the models of rigid foundations that a compacted wedge-shaped core of soil is formed with the destruction of the bases, which is a natural extension of the foundation. In the research of the strip foundation model with variable geometric shape of the foundation base, a compaction soil area of spherical shape with a diameter close to the width of the foundation model is found on a sand base. A wedge-shaped core, along the edges of which there has been a shift in mass of the base when achieving the ultimate loading, has been noted in a compaction soil area. The solid part of the foundation base is the compacted wedge-shaped core base, the height of the wedge-shaped core being commensurate with the length of the elements forming the foundation. Identified geometric parameters of compacted core under the foundation base of strip foundation with geometrically variable shape can be used in determining the ultimate bearing capacity of soil of the base for such foundations.

Applications of SIMS to electronic materials and devices

1992 ◽  
Vol 50 (2) ◽  
pp. 1682-1683
Author(s):  
S.F. Corcoran
Keyword(s):  
Depth Distribution ◽  
Secondary Ion Mass Spectrometry ◽  
Semiconductor Device ◽  
Electronic Materials ◽  
Profile Analysis ◽  
Semiconductor Industry ◽  
Small Diameter ◽  
Depth Resolution ◽  
Detection Sensitivity

Over the past decade secondary ion mass spectrometry (SIMS) has played an increasingly important role in the characterization of electronic materials and devices. The ability of SIMS to provide part per million detection sensitivity for most elements while maintaining excellent depth resolution has made this technique indispensable in the semiconductor industry. Today SIMS is used extensively in the characterization of dopant profiles, thin film analysis, and trace analysis in bulk materials. The SIMS technique also lends itself to 2-D and 3-D imaging via either the use of stigmatic ion optics or small diameter primary beams.By far the most common application of SIMS is the determination of the depth distribution of dopants (B, As, P) intentionally introduced into semiconductor materials via ion implantation or epitaxial growth. Such measurements are critical since the dopant concentration and depth distribution can seriously affect the performance of a semiconductor device. In a typical depth profile analysis, keV ion sputtering is used to remove successive layers the sample.

Fluorescence effects in quantitative microprobe analysis

1990 ◽  
Vol 48 (2) ◽  
pp. 188-189
Author(s):  
S.J.B. Reed
Keyword(s):  
Microprobe Analysis ◽  
Depth Distribution ◽  
Exciting Radiation ◽  
Primary Radiation ◽  
List Type ◽  
Type Number ◽  
Computing Power ◽  
X Ray ◽  
Fluorescent Radiation

Characteristic fluorescenceThe theory of characteristic fluorescence corrections was first developed by Castaing. The same approach, with an improved expression for the relative primary x-ray intensities of the exciting and excited elements, was used by Reed, who also introduced some simplifications, which may be summarized as follows (with reference to K-K fluorescence, i.e. K radiation of element ‘B’ exciting K radiation of ‘A’):1.The exciting radiation is assumed to be monochromatic, consisting of the Kα line only (neglecting the Kβ line).2.Various parameters are lumped together in a single tabulated function J(A), which is assumed to be independent of B.3.For calculating the absorption of the emerging fluorescent radiation, the depth distribution of the primary radiation B is represented by a simple exponential.These approximations may no longer be justifiable given the much greater computing power now available. For example, the contribution of the Kβ line can easily be calculated separately.

A New Numerical Model for Electron-Probe Analysis at High Depth Resolution

1996 ◽  
Vol 54 ◽  
pp. 490-491
Author(s):  
P.-F. Staub ◽  
C. Bonnelle ◽  
F. Vergand ◽  
P. Jonnard
Keyword(s):  
Electron Probe ◽  
Surface Segregation ◽  
Depth Distribution ◽  
Computing Time ◽  
Depth Resolution ◽  
Physical Parameters ◽  
Electron Probe Analysis ◽  
Interface Phases ◽  
Excitation Conditions ◽  
High Depth

Characterizing dimensionally and chemically nanometric structures such as surface segregation or interface phases can be performed efficiently using electron probe (EP) techniques at very low excitation conditions, i.e. using small incident energies (0.5<E0<5 keV) and low incident overvoltages (1<U0<1.7). In such extreme conditions, classical analytical EP models are generally pushed to their validity limits in terms of accuracy and physical consistency, and Monte-Carlo simulations are not convenient solutions as routine tools, because of their cost in computing time. In this context, we have developed an intermediate procedure, called IntriX, in which the ionization depth distributions Φ(ρz) are numerically reconstructed by integration of basic macroscopic physical parameters describing the electron beam/matter interaction, all of them being available under pre-established analytical forms. IntriX’s procedure consists in dividing the ionization depth distribution into three separate contributions:

The zoonotic potential of bat-borne coronaviruses

2020 ◽  
Vol 4 (4) ◽  
pp. 365-381
Author(s):  
Ny Anjara Fifi Ravelomanantsoa ◽  
Sarah Guth ◽  
Angelo Andrianiaina ◽  
Santino Andry ◽  
Anecia Gentles ◽  
...  
Keyword(s):  
Genetic Material ◽  
Field Research ◽  
Sympatric Species ◽  
Animal Origin ◽  
Mammalian Host ◽  
Past Century ◽  
The Past ◽  
Novel Host ◽  
Horseshoe Bat ◽  
Human Infections

Seven zoonoses — human infections of animal origin — have emerged from the Coronaviridae family in the past century, including three viruses responsible for significant human mortality (SARS-CoV, MERS-CoV, and SARS-CoV-2) in the past twenty years alone. These three viruses, in addition to two older CoV zoonoses (HCoV-229E and HCoV-NL63) are believed to be originally derived from wild bat reservoir species. We review the molecular biology of the bat-derived Alpha- and Betacoronavirus genera, highlighting features that contribute to their potential for cross-species emergence, including the use of well-conserved mammalian host cell machinery for cell entry and a unique capacity for adaptation to novel host environments after host switching. The adaptive capacity of coronaviruses largely results from their large genomes, which reduce the risk of deleterious mutational errors and facilitate range-expanding recombination events by offering heightened redundancy in essential genetic material. Large CoV genomes are made possible by the unique proofreading capacity encoded for their RNA-dependent polymerase. We find that bat-borne SARS-related coronaviruses in the subgenus Sarbecovirus, the source clade for SARS-CoV and SARS-CoV-2, present a particularly poignant pandemic threat, due to the extraordinary viral genetic diversity represented among several sympatric species of their horseshoe bat hosts. To date, Sarbecovirus surveillance has been almost entirely restricted to China. More vigorous field research efforts tracking the circulation of Sarbecoviruses specifically and Betacoronaviruses more generally is needed across a broader global range if we are to avoid future repeats of the COVID-19 pandemic.

Understanding Suicide Terrorism

2017 ◽  
Vol 36 (04) ◽  
pp. 245-250
Author(s):  
A. Speckhard
Keyword(s):  
Western Europe ◽  
Field Research ◽  
Suicide Terrorism ◽  
Terrorist Organizations ◽  
Global Migration ◽  
The Balkans ◽  
Single Region ◽  
Extensive Field ◽  
The World ◽  
Terrorist Groups

SummaryAs a terror tactic, suicide terrorism is one of the most lethal as it relies on a human being to deliver and detonate the device. Suicide terrorism is not confined to a single region or religion. On the contrary, it has a global appeal, and in countries such as Syria, Iraq, Afghanistan, and Pakistan it has come to represent an almost daily reality as it has become the weapon of choice for some of the most dreaded terrorist organizations in the world, such as ISIS and al-Qaeda. Drawing on over two decades of extensive field research in five distinct world regions, specifically the Middle East, Western Europe, North America, Russia, and the Balkans, the author discusses the origins of modern day suicide terrorism, motivational factors behind suicide terrorism, its global migration, and its appeal to modern-day terrorist groups to embrace it as a tactic.

IMPLEMENTASI MANAJEMEN KURIKULUM MADRASAH MUROTTILIL QUR’AN AL-RIFA’IE 2 MALANG

2019 ◽  
Vol 1 (1) ◽  
pp. 70
Author(s):  
Akhmad Ulul Albab
Keyword(s):  
Planning Process ◽  
Case Study Research ◽  
Field Research ◽  
Evaluation Process ◽  
Observation Time ◽  
Curriculum Planning ◽  
Research Approach ◽  
Learning Program ◽  
Planning Stage ◽  
Academic Calendar

This thesis aims to examine the management process applied in the Madrasah Murottilil Qur'an Al-Rifa'ie 2 Malang. Beginning with the curriculum planning process, implementing the curriculum, and how to evaluate the curriculum of the Madrasah Murottilil Qur'an Al-Rifa'ie 2 Malang. This research aims to find out and describe the managerial process of the curriculum, and the inhibiting factors in the implementation of efforts to achieve the vision, mission that has been set.This thesis is a report on the results of field research using a qualitative descriptive method with a case study research approach that takes place at the Al-Rifa'ie 2 Malang Boarding School.Data collection is done by interview, observation, and documentation. Data analysis is done by reducing data, then presenting data, and finally from the compiled data conclusions are drawn. Checking the validity of the data is done with credibility which includes Triangulation, peer checking, extension of observation time, increasing perseverance.The results of the analysis show that the curriculum management implemented by p Madrasah Murottilil Qur'an Al-Rifa'ie 2 At the planning stage, the process carried out was planning the implementation time, the learning program, making the academic calendar, and how the evaluation was held. At the implementation stage, it starts with a new santri test, conducts learning and conducts an ascension test. The evaluation process is carried out at least 2x in one month, and 1 and after one semester.

Implementasi nilai-nilai Etika, Moral dan Akhlak dalam perilaku belajar di STIT Raden Wijaya Mojokerto

2018 ◽  
Vol 1 (2) ◽  
pp. 71
Author(s):  
Aan Eko Khusni Ubaidillah
Keyword(s):  
Field Research ◽  
Qualitative Approach ◽  
Learning Behavior ◽  
The West ◽  
Internal Factors ◽  
Inhibiting Factors ◽  
Analysis Technique ◽  
Western Values ◽  
Culture Environment ◽  
Research Type

The problems we face today live in a time of moral degradation and destruction. People feel proud if they can imitate the trend carried by the West; both in thought and lifestyle. Ironically, not a few generations of Muslims who terpedaya with the trend. They make Western values ​​as their standard of behavior and morals. Meanwhile, Islamic morality is increasingly felt strange and difficult to practice in the midst of society facing such problems plural and complex. The purpose of this study are: 1) To describe the steps Implementation of values ​​of Ethics, Moral and Morals in learning behavior in STIT Raden Wijaya Mojokerto. 2) To describe the supporting and inhibiting factors Implementation of Ethics, Morals and Morals values ​​in the behavior of learning in STIT Raden Wijaya Mojokerto This research type is field research research using qualitative approach. Data collection techniques include observation, interview, and documentation. Data analysis technique uses descriptive explorative, that is by describing state and phenomenon status. Based on the exposure of the analysis of data sources can be concluded that: 1) Steps Implementation of values ​​of Ethics, Morals and Morals in the behavior of learning in STIT Raden Wijaya Mojokerto is the first institution to make a mature planning, then applied with the pattern pembiasaan. 2) To describe the supporting and inhibiting factors Implementation of Ethics, Morals and Morals values ​​in learning behavior in STIT Raden Wijaya Mojokerto consists of internal factors (consisting of heredity, gender, physical character, personality, intelligence and talent) and external ( consisting of education, religion, culture, environment and socio-economic)

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