Estimation of Stature from Length and Breadth of Left Thumb in Medical Students of a Medical College in Kathmandu, Nepal

There is enormous importance of identification for forensic experts. Identification of human remains is always challenging for them, worldwide. An individual’s parameter has been an intrinsic representative among the other parameters. To specify the relationship between height and finger length in healthy persons, both male and female, an effort has been made to originate the regression formula. A descriptive and cross-sectional study was conducted at Department of Forensic Medicine, Nepal Medical College Teaching Hospital, Kathmandu with sample size 100 males and 100 females of 18-25 years of age. The stature of male subjects was 170.02 cm mean value with SD (± 6.40). The minimum stature observed was 152.5 cm while maximum was 188 cm. In males, mean of the left thumb length was 3.2 cm with SD (±0.38). Also, breadth of the left thumb showed a mean value of 2.52cm SD (±0.46) with Pearson coefficient (0.258). By means of linear regression analysis a constant (147.096) and Pearson correlation coefficient (0.337) were obtained for the length of left thumb. In female subjects, stature was found to be 157.76 cm mean value with SD (± 6.30). The minimum stature was 136.00 cm and maximum was 175.00 cm. The mean of left thumb length was 2.95 cm and 2.25 cm for breadth with SD (±0.4166) for both. Applying multiple regression, a constant (148.83) and Pearson coefficient (0.25) were obtained for left thumb length and SD (±0.423) was obtained for left thumb breadth. In males the stature can be estimated using standard equation (S= 150.49+4.65LTL+1.82LTB). In females, stature can be estimated using standard equation (S=148.83+4.4114LTL+1.423LTB), where S=stature, LTL= left thumb length, LTB= left thumb breadth. A multiple regression equation derived by our study can be used for estimation of height in Nepalese population. If either of the measurements (left thumb length and breadth) is known, the other can be calculated. It is remarked that length and breadth of left thumb shows positive relationship with the stature.

Lagrangian tracking of fibres in a channel flow

Tracking of fibres in a fluid flow is much more complicated than tracking of spherical particles. In fibre motion, the orientation of fibre against the flow direction plays a very important role. In addition to the standard equation of motion, additional equations for orientation and angular velocity must be solved during the tracking of fibres. A mathematical model describing fibre motion is introduced in this work. Capabilities of this model are demonstrated through simulations of fibre transportation by air in a channel flow. The importance of the terms in the equation of angular velocity are discussed.

Structures and properties of null scroll in Minkowski 3-space

In this paper, we study structures and properties of Null scrolls. We define the (relative) invariants for Null scrolls by using a kind of standard equation. Using these (relative) invariants of Null scrolls, we give some new characterizations and classifications of Null scrolls and B-scrolls.

Computing Volumes Surrounded by a Quadric Surface and a Plane with MATLAB

We describe how to compute volumes of solids surrounded by a quadric surface and a plane. First, we use coordinate transformations to change an equation of a quadric surface into a standard equation, then apply integration techniques to find formulae of computing volumes. A MATLAB procedure is programmed that can be used to evaluate volumes bounded by a quadric surface and a plane.

Research on the Relation of Thunderstorm Days and Lightning Density in Jiangsu Province

Thunderstorm days are used to show the lightning frequency happened somewhere. Through comparative analysis on the thunderstorm days data of 66 weather stations in Jiangsu province and lightning data of ADTD lightning monitoring, it presents that the correlation coefficient r became the largest at 11 km range, and the longest distance of thunderstorm artificial observation is 11-14 km. According to the study of lightning activities in Jiangsu province to get the statistical fitting function curve equation by thunderstorm days and ground flash density data. Test the actual application effect of fitting equation by calculating the average relative error of fitting equation and standard equation, then make sure the actual thunderstorm days in Jiangsu province and the cloud to ground flash density formula is Ng=0.0224 Td1.48.

A Versatile Cam Profile for Controlling Interface Force in Multiple-Dwell Cam-Follower Systems

Cam follower systems are widely used in manufacturing because of their precise motion and ability to easily dwell. The cam typically drives a follower in some precise motion needed to accomplish a manufacturing task. Presented in this paper is a closed-form modified trapezoidal cam motion function with adjustable positive and negative acceleration. The profile is suitable for multiple-dwell cam and follower applications. The profile is particularly applicable to high-speed cams in which the follower acceleration is a primary design objective. The main benefit of the profile is that it allows cam designers to easily set limits on the positive and negative acceleration to achieve design objectives. Additional benefits are that the cycle jerk is continuous and that the cam designer can control the maximum magnitude of jerk. The motion program is presented in closed-form for easy implementation in standard equation-solver or spreadsheet software. Dynamic and harmonic analyses are presented to illustrate the benefits of the profile.

In situ calibration and [H+] sensitivity of the fluorescent Na+indicator SBFI

Despite the popularity of Na+-binding benzofuran isophthalate (SBFI) to measure intracellular free Na+ concentrations ([Na+]i), the in situ calibration techniques described to date do not favor the straightforward determination of all of the constants required by the standard equation (Grynkiewicz G, Poenie M, and Tsien RY. J Biol Chem 260: 3440–3450, 1985) to convert the ratiometric signal into [Na+]. We describe a simple method in which SBFI ratio values obtained during a “full” in situ calibration are fit by a three-parameter hyperbolic equation; the apparent dissociation constant ( K d) of SBFI for Na+ can then be resolved by means of a three-parameter hyperbolic decay equation. We also developed and tested a “one-point” technique for calibrating SBFI ratios in which the ratio value obtained in a neuron at the end of an experiment during exposure to gramicidin D and 10 mM Na+is used as a normalization factor for ratios obtained during the experiment; each normalized ratio is converted to [Na+]i using a modification of the standard equation and parameters obtained from a full calibration. Finally, we extended the characterization of the pH dependence of SBFI in situ. Although the K d of SBFI for Na+ was relatively insensitive to changes in pH in the range 6.8–7.8, acidification resulted in an apparent decrease, and alkalinization in an apparent increase, in [Na+]i values. The magnitudes of the apparent changes in [Na+]ivaried with absolute [Na+]i, and a method was developed for correcting [Na+]i values measured with SBFI for changes in intracellular pH.