in advance longwall mining, the safety of mine network, production rate, and consequently, economic conditions of a mine are dependent on the stability conditions of gate roadways. the gate roadway stability is a function of two important factors: 1) characteristics of the excavation damaged zone (edz) above the gate roadway and 2) loading effect due to the caving zone (cz) above the longwall w...

riverbank erosion, land loss and associated sedimentation are river engineering and water resources management problems of global significance. the ability to predict riverbank stability on eroding rivers is the prerequisite of developing a channel width adjustment model and is essential for estimating riverbank erosion and associated sedimentation. in this research, a detailed model for stabil...

Stability analysis in compliant mechanism (CM) design is of utmost importance. From a practical point of view, a CM that is unstable is of no significance (has no practical value). Three useful plots were considered in the evaluation of each of the dynamic models of nine configurations of compliant constant-force compression mechanisms (CCFCMs) for their stability characteristics, which include...

In modern clinical practice, combination fixed - dose tablets have become a baseline foreffective therapy in many clinical conditions. The Hydrochlorothiazide (Hctz) (12.5mg) /Lisinopril (Lis) (10 mg) tablet is a combination drug for treatment of hypertension. In thisstudy, the tablets were prepared by wet granulation method and characterized in terms of weightvariation, hardness, friability, d...

In this paper, let Σ ⊂ R be a compact convex hypersurface. We prove that if Σ carries only finitely many geometrically distinct closed characteristics, then at least two of them must possess irrational mean indices. Moreover, if Σ carries exactly three geometrically distinct closed characteristics, then at least two of them must be elliptic.

Stability data are often collected to determine the shelf life of certain characteristics of a pharmaceutical product, for example, a drug's potency over time. Statistical approaches such as the linear regression models are considered as appropriate to analyze the stability data. However, most of these regression models in both theory and practice rely heavily on their underlying parametric ass...

The single polarity charge sensing method based on coplanar grid electrodes has demonstrated promising results on CZT detectors having volumes of ~1 cm. This paper presents the performance of two coplanar grid CZT detectors having dimensions of 1.5 1 5 1.0 cm2, among the largest CZT spectrometers that have been reported. Energy resolutions of 2.3% and 2.0% full-width half-maximum were obtained ...

During the XVI and XVII centuries the India Route was the longest regular commercial route of its time and connected Lisbon, Portugal, with Goa or Cochin in the Indian subcontinent. However, there is presently very little technical knowledge about the technical characteristics of the different ship types employed in this trade. This paper starts by describing briefly the shipbuilding treatises,...

Premix formulation has a dramatic impact on premix handling and feed distribution characteristics, potential drug loss during the feed manufacturing and delivery process, and drug stability under adverse conditions such as pelleting or harsh environmental temperatures. Ultimately, premix formulation has a direct effect on the amount of drug presented to the pig’s digestive tract for disease tre...

The indexical function of speech prosody signals the membership of a speaker in a social group. The factors of age and gender are relatively easy to establish but their reflection in speech characteristics can be less straightforward as they interact with other social aspects. Therefore, diverse speaker communities should be investigated with the aim of their subsequent comparison. Our study pr...