نتایج جستجو برای: lack of penetration

تعداد نتایج: 21166757  

Journal: :journal of dentistry, tehran university of medical sciences 0
m. saatchi l. etesami

statement of problem: it has been established that successful root canal treatment depends on the quality of obturation. deeper penetration of spreaders can improve the apical seal and the quality of the obturation. purpose: the aim of this study was to compare the initial penetration depth of spreaders during lateral condensation of 0.04 and 0.02 tapered gutta-percha master cones. materials an...

ژورنال: علوم آب و خاک 2019

Long-term use of treated wastewaters for irrigation adds compounds and/or ions to soils which might alter the soil physical, hydraulic and mechanical properties. Soil mechanical properties are closely linked with the plant growth. This study was conducted to investigate the effect of short-, mid- and long-term applications of the treated wastewater of Mobarake Steel Company in Isfahan on the so...

ژورنال: مواد پرانرژی 2019

Performance improvement and penetration increment of Explosively Formed Penetrators (EFP) is one of the most considerable issues in the field of defense researches. There are various solutions to achieve this purpose, including innovative designs in the field of charge, linear, skin, explosive train, etc. In this paper, the effect of multi-point initiation, on the formation and penetration of E...

2015
Shamal Faily John McAlaney Claudia Iacob

Penetration testers are required to attack systems to evaluate their security, but without engaging in unethical behaviour while doing so. Despite work on hacker values and studies into security practice, there is little literature devoted to the ethical pressures associated with penetration testing. This paper presents several ethical dilemmas and dimensions associated with penetration testing...

2007
David Lie Mahadev Satyanarayanan

Security researchers and practitioners lack techniques to quantitatively evaluate the strength of security systems against a determined attacker. Currently, evaluation is either qualitative, such as through security certification standards, or ad-hoc, such as through penetration testing and auditing. In this paper, we propose a framework that if applied to security systems, would produce quanti...

ژورنال: مواد پرانرژی 2015

Shaped charges defeat armours by means of high velocity jets formed by the collapse of a metallic liner as a result of the detonation of an explosive. The explosive formulation is an important factor influencing the properties of a shaped charge. Explosive charges used in penetrating devices have usually high detonation velocity and high density. In this research, composition based on HTPB havi...

ژورنال: مواد پرانرژی 2015

One application of energetic materials in the military is shaped charged warhead. The most important application of this type of warheads is penetration into target. For this purpose, several factors influence the design of shaped charge. Liner thickness is one of most effective factors in the design of shaped charge, which has a significant role in jet Velocity and depth of penetration in targ...

Journal: :journal of structural engineering and geo-techniques 2012
m khalili noutash r dabiri m hajialilue bonab

the liquefaction resistance of soil can be evaluated using laboratory tests such as cyclic simple shear, cyclic triaxial, cyclic torsional shear as well as field methods like standard penetration test (spt), cone penetration test (cpt) and shear wave velocity (vs). in this regard, this study attempts to compare the results of the spt based on the simplified procedure proposed by seed and idriss...

ژورنال: تحقیقات موتور 2018
Fajri, H. R. , Hajiali Mohammadi, A., Mirsalim, S. M. , Nazari Chekoveri, M.,

The development of spray is one of the important factors effecting the combustion of PFI engines. This research was carried out in order to investigate some of the spray characteristics from PFI injector. In this study, the injector flux was investigated by a mass method and equations for it were presented. The results showed that in the pressure interval (2 to 6 bar), the relation of flux with...

2008
Melvin X.L. Tan Karen P. Hapgood

Wet granulation using foaming binder solution is a new approach of liquid delivery to create granules. This study compares wet granulation via foamed binder addition method and sprayed binder addition method by studying the kinetics of foam and drop penetrations into loosely packed powder beds. Foam and drop nucleation kinetics were compared by examining specific penetration time (penetration t...

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