scholarly journals On Calculating the Packing Efficiency for Embedding Hexagonal and Dodecagonal Sensors in a Circular Container

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Marina Prvan ◽  
Julije Ožegović ◽  
Arijana Burazin Mišura
Keyword(s):  
Production Cost ◽  
Regular Hexagon ◽  
Circular Area ◽  
Packing Problems ◽  
Circular Shape ◽  
Area Of Interest ◽  
Mathematical Expressions ◽  
Cms Detector ◽  
The Difference ◽  
Packing Efficiency

In this paper, a problem of packing hexagonal and dodecagonal sensors in a circular container is considered. We concentrate on the sensor manufacturing application, where sensors need to be produced from a circular wafer with maximal silicon efficiency (SE) and minimal number of sensor cuts. Also, a specific application is considered when produced sensors need to cover the circular area of interest with the largest packing efficiency (PE). Even though packing problems are common in many fields of research, not many authors concentrate on packing polygons of known dimensions into a circular shape to optimize a certain objective. We revisit this problem by using some well-known formulations concerning regular hexagons. We provide mathematical expressions to formulate the difference in efficiency between regular and semiregular tessellations. It is well-known that semiregular tessellation will cause larger silicon waste, but it is important to formulate the ratio between the two, as it affects the sensor production cost. The reason why we have replaced the “perfect” regular tessellation with semiregular one is the need to provide spacings at the sensor vertices for placing mechanical apertures in the design of the new CMS detector. Archimedean {3,122} semiregular tessellation and its more flexible variants with irregular dodecagons can provide these triangular spacings but with larger number of sensor cuts. Hence, we construct an irregular convex hexagon that is semiregularly tessellating the targeted area. It enables the sensor to remain symmetric and hexagonal in shape, even though irregular, and produced with minimal number of cuts with respect to dodecagons. Efficiency remains satisfactory, as we show that, by producing the proposed irregular hexagon sensors from the same wafer as a regular hexagon, we can obtain almost the same SE.

Effect of Tobacco on Lipoprotein Profile: A Comparative study among Smokers and Chewers

2021 ◽  
pp. 4973-4976
Author(s):  
Roshan Kumar Jha ◽  
Ranjit S. Ambad ◽  
Priya Koundal ◽  
Akansha Singh
Keyword(s):  
Risk Factors ◽  
Coronary Heart Disease ◽  
Heart Disease ◽  
Total Cholesterol ◽  
Sample Processing ◽  
Exclusion Criteria ◽  
Future Studies ◽  
Area Of Interest ◽  
Significant Difference ◽  
The Difference

It has been proved that tobacco is one of the cholesterol dependent risk factors pathogenically, and in addition with other risk factors it may lead to coronary heart disease. Thus, a strong interaction exists between hypercholesterolemia and tobacco ingesting in the genesis of coronary heart disease. The aim of this study was to study the effect of tobacco smoking and chewing and compare its effect on lipoproteins. 60 subjects were included in the study, and were grouped into 3 three groups, tobacco smokers, tobacco chewers and tobacco non-abusers. Each group comprises 20 participants: selected on the basis of inclusion and exclusion criteria. Proper sampling and sample processing methods were employed to evaluate lipid profile. Total cholesterol and triglycerides levels were increased in smokers in comparison to non-smokers/non-chewers, and the differences were significant p<0.0001. HDL level was decreased in smokers as compared to non-smokers/non-chewers and the difference was statistically significant p<0.0001. Total cholesterol and LDL levels were increased in smokers in comparison to chewers. HDL level was decreased in chewers as compared to chewers. There was no significant association in any of the parameters. Present study observed increased and significant p<0.0001 differences in levels of total cholesterol and triglycerides while, HDL levels were decreased significantly p<0.0001, and also observed there was no significant difference among tobacco smokers and chewers. This may be a new area of interest for future studies.

Prediction Changes for Nonstationary Multi-Temporal Satellite Images using HMM

2017 ◽  
pp. 387-406
Author(s):  
Ali Ben Abbes ◽  
Imed Riadh Farah
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Satellite Image ◽  
Remotely Sensed ◽  
High Temporal Resolution ◽  
Remotely Sensed Data ◽  
Vegetation Monitoring ◽  
Area Of Interest ◽  
Multi Temporal ◽  
The Difference

Due to the growing advances in their temporal, spatial, and spectral resolutions, remotely sensed data continues to provide tools for a wide variety of environmental applications. This chapter presents the benefits and difficulties of Multi-Temporal Satellite Image (MTSI) for land use. Predicting land use changes using remote sensing is an area of interest that has been attracting increasing attention. Land use analysis from high temporal resolution remotely sensed images is important to promote better decisions for sustainable management land cover. The purpose of this book chapter is to review the background of using Hidden Markov Model (HMM) in land use change prediction, to discuss the difference on modeling using stationary as well as non-stationary data and to provide examples of both case studies (e.g. vegetation monitoring, urban growth).

scholarly journals Two Useful Discrete Distributions to Model Overdispersed Count Data

2020 ◽  
Vol 43 (1) ◽  
pp. 21-48
Author(s):  
Josmar Mazucheli ◽  
Wesley Bertoli ◽  
Ricardo Puziol Oliveira
Keyword(s):  
Infinite Series ◽  
Count Data ◽  
Survival Function ◽  
Continuous Distribution ◽  
Discrete Distributions ◽  
Mathematical Expressions ◽  
Probability Mass ◽  
The Difference ◽  
Discrete Analogues ◽  
Mass Functions

The methods to obtain discrete analogues of continuous distributions have been widely considered in recent years. In general, the discretization process provides probability mass functions that can be competitive with the traditional model used in the analysis of count data, the Poisson distribution. The discretization procedure also avoids the use of continuous distribution in the analysis of strictly discrete data. In this paper, we seek to introduce two discrete analogues for the Shanker distribution using the method of the infinite series and the method based on the survival function as alternatives to model overdispersed datasets. Despite the difference between discretization methods, the resulting distributions are interchangeable. However, the distribution generated by the method of infinite series method has simpler mathematical expressions for the shape, the generating functions and the central moments. The maximum likelihood theory is considered for estimation and asymptotic inference concerns. A simulation study is carried out in order to evaluate some frequentist properties of the developed methodology. The usefulness of the proposed models is evaluated using real datasets provided by the literature.

Studies in crop variation: V. The relation between yield and soil nutrients

1928 ◽  
Vol 18 (4) ◽  
pp. 602-627 ◽  
Author(s):  
BH Balmukand
Keyword(s):  
General Character ◽  
Experimental Plant ◽  
Single Factor ◽  
Mathematical Expressions ◽  
Direct Interpretation ◽  
The Difference ◽  
Potato Crops ◽  
Physical Quantities ◽  
Quantitative Response ◽  
Simultaneous Variation

The study of the relation of plant-growth to environmental factors has led to much research directed to the elaboration of General Formulae expressing the quantitative response of the experimental plant or crop to the quantity of the nutrients with which it is supplied. For variations of a single nutrient only many different mathematical expressions will serve to describe the facts to the accuracy with which these are usually ascertained by experiment; the practical value of such formulae is, however, much impaired if the parameters or constants which they involve change their value from experiment to experiment. If, on the contrary, we can obtain formulae of a general character which represents satisfactorily not only the response to variation of a single factor, but the response to simultaneous variation of two or more different factors, then we have reason to believe that the parameters of such formulae will not depend upon the casual or non-essential conditions of the experiment, but will be capable of direct interpretation as physical quantities. We have shown that the Resistance Formula does fit the data of several two-factor experiments and the agreement of the three values of an determined from the three potato crops as well as the agreement of the difference in the values of k on a dunged and undunged plot with the potash expected to be available from the ten tons of dung shows that this expectation is so far justified. The parameters of the Resistance Formula are capable of a direct and definite physical interpretation; for each nutrient there are two constants; one represents the importance of the nutrient considered to the crop concerned, and may be expected to vary from crop to crop and from variety to variety, and so to afford a direct comparison between varieties of their manurial needs, while the second represents the amount of nutrient available in the unmanured soil.

Mechanism and its Mathematical Expressions of Stress-Induced Light Emission of ZnS:Mn/Polyester Composite

2017 ◽  
Vol 728 ◽  
pp. 252-257
Author(s):  
Sirichai Leelachao ◽  
Shinji Muraishi ◽  
Yoshio Nakamura
Keyword(s):  
Light Emission ◽  
Level Shift ◽  
Electron Hole ◽  
Mathematical Expressions ◽  
Emission Color ◽  
Thermal Equilibrium Condition ◽  
Polyester Composite ◽  
The Difference ◽  
Luminescent Centers ◽  
The Given

Mechanism of mechanoluminescence of the composite of Mn-doped ZnS particles and polyester resin is developed based on the principle of Fermi-level shift, associated by piezoelectric effect. As the electron-hole recombination is responsible for light emission, it is possible to determine the number of emitted photons from the difference in number of conducting electrons between the stressed state and the thermal equilibrium condition. For the given emission color, characteristics of photomultiplier tube and deformation conditions, the emitted photons can be approximated. The model is expressed as A[exp (Bσ2) - 1] where σ is the applied stress, a pre-exponential A illustrates the efficiency of luminescent centers and the influences of dielectric and piezoelectric constants of ZnS host and temperature are displayed as the exponent factor B.

scholarly journals Visual Attention Patterns in Adults According to the Use of Things in Aided AAC VSDs: An Eye-tracking Study

2021 ◽  
Vol 26 (3) ◽  
pp. 718-726
Author(s):  
Jin Hui Lee ◽  
Ji Young Na ◽  
Su Hyang Lee ◽  
Bong Won Yi
Keyword(s):  
Visual Attention ◽  
Eye Tracking ◽  
Target Object ◽  
Visual Scene ◽  
Partial Group ◽  
Area Of Interest ◽  
Total Fixation ◽  
Object Usage ◽  
The Difference ◽  
Tracking Technology

Objectives: This study aims to investigate patterns of visual attention on a target object in VSDs (Visual Scene Displays) when they are designed with/without an action of usage of the object. We used eye-tracking technology to evaluate how the action of usage of an object in still photographs influenced the visual attention of adults without disabilities. We tried to examine visual attention on the contents of visual scene displays (VSDs).Methods: 25 college students participated in the study. Eye-tracking technology recorded point-of-gaze while participants viewed 20 photographs. Data from eye-tracking provided information on where participants were visually fixated and paid more attention on the presented VSDs including a target object.Results: Both total fixation duration and average fixation count were statistically significant. Participants visually fixated on the target object longer and more often when the object was being used in the presented VSDs. For AOI (Area Of Interest) time of the first fixation, after analyzing only a partial group that had the data match due to the difference in gaze pattern per subject, the average AOI time of the first fixation was shown to be faster when using an object in 6 out of 10 objects.Conclusion: This study supports the inclusion of an action of an object usage in VSDs suggesting that the act of object usage can partially influence the visual attention pattern of a user.

scholarly journals Steganography in High Intensity Pixel of a Thermal Image using Barcode Encoder Technique

2019 ◽  
Vol 8 (3) ◽  
pp. 6787-6789
Keyword(s):  
High Intensity ◽  
Random Number ◽  
Region Of Interest ◽  
Thermal Image ◽  
Intensity Level ◽  
Human Race ◽  
Area Of Interest ◽  
Normal Image ◽  
The Difference ◽  
Image Fusion Technique

In this research, the high intensity pixels are the region of interest is selected based on the difference in the intensity level of the colors in an image. The image holding the information is hidden in a cover image which is pattern locked in which a random number is allocated for each of the pixel. The pattern is drawn and the nodes that connect each pixel were selected and marked as the area of interest, which has high intensity as said. These numbers extracted and converted to barcode that are saved as normal image. In this proposed research the information that is hidden in the normal image is fused with the thermal image, which comprises of high intensity colors. The image fusion technique which is proposed in this research is much interesting that ensures more security as it do not reveals any clue about the existence of the information to interpreters. This research, analyzes the Barcode Encoder technique in steganography only on colors with high intensity, and identifies those areas where this technique can be applied, so that the human race could be benefited abundantly.

scholarly journals ANALISYS PRODUCTION COST of SAWMILL ON THE PT KATINGAN TIMBER CELEBES IN WAMLANA VILLAGE BURU REGENCY

2020 ◽  
Vol 4 (1) ◽  
pp. 64-79
Author(s):  
Fitri N.S. Ellis ◽  
Troice E. Siahaya ◽  
Mersiana Sahureka
Keyword(s):  
Production Cost ◽  
Raw Materials ◽  
Labor Cost ◽  
Research Data ◽  
Overhead Cost ◽  
Interview Methods ◽  
Sawmill Industry ◽  
Cost Of Production ◽  
The Difference ◽  
The Cost

The objective of this study was to find out components of production cost and analyzing the cost of production materials which used full costing method and variable costing method. This research was conducted at October 2019 on PT. Katingan Timber Celebes Wamlana Village, Fenaleisela Subdistrict, Buru Regency. The company is a buried sawmill industry at Buru Island when has a primary industrial license for timber. Research data were collected by observation, documentation and interview methods, and then analyzed by full costing and variable costing methods. The result showed that the components of production cost consist of raw materials cost, direct labor cost used fixed factory overhead cost and variable factory overhead cost. The cost of production used costing method have value of  Rp.5.120.341.644,- more higher compered to variable costing is Rp.4.542.320.899,- the difference value of the cost of production due to full costing methods which imposes the fixed overhead cost and the variable overhead cost, that the cost of production is higher than with variable costing methods which imposes by factory overhead cost.

scholarly journals ANALYSIS OF MATHEMATICAL WRITING ERRORS RELATED TO THE ANGLE OF TRIGONOMETRI FUNCTIONS

2021 ◽  
Vol 6 (1) ◽  
pp. 71-82
Author(s):  
Budi Mulyono ◽  
Hapizah
Keyword(s):  
Graphical Form ◽  
Trigonometric Functions ◽  
Close Attention ◽  
Mathematical Writing ◽  
Mathematical Expressions ◽  
Learning Mathematics ◽  
The Difference ◽  
Writing Errors ◽  
Technology In Learning

Mathematical writing errors are often made by students, especially when writing mathematical expressions on the angle of trigonometric functions. One of the causes of this error is that students do not pay close attention to the difference between radians and degrees when writing questions or writing answers. These mathematical writing errors were made mainly by students who were oriented towards the result of the answer to a question, without paying attention to good and correct writing rules. One form of writing errors in mathematical expressions of trigonometric functions is writing y = sin (x + 45), which is considered the same as writing y = sin (x + 45o). If they are asked to compare the graphical form of the function of the two mathematical expressions in the same image, the writing error will be recognized and seen. Counterexamples and technology in learning mathematics can help students understand and correct errors in writing mathematical expressions of trigonometric functions.

scholarly journals The Effect of The Body Composition to Prognosis in Young Breast Cancer Patients

2020 ◽  
Author(s):  
Ismail Beypinar ◽  
Furkan Kaya ◽  
Hacer Demir
Keyword(s):  
Breast Cancer ◽  
Body Composition ◽  
Adipose Tissue ◽  
Cancer Patients ◽  
Ct Images ◽  
The Body ◽  
Erector Spinae ◽  
Area Of Interest ◽  
Axial Ct ◽  
The Difference

Abstract Background In cancer patients, the effect of the body composition on prognosis is a new clinical area of interest. In patients with class 2 or 3 obesity (BMI > 35), survival found to be worse control groups in a pooled analysis. BMI category is not truly representing body composition and hard to use to determine the true muscle and fat quantity. Computed tomography (CT) is a frequent method to determine body composition precisely.Methods Axial CT images, including all abdominal muscles (psoas, erector spinae, quadratus lumborum) external and internal oblique and rectus abdominis) total skeletal muscle area (SMA), was calculated. Besides, axial CT images of the body fat subcutaneous adipose and visceral adipose tissue distribution (VAT, SAT) areas were calculated in cm2 using threshold values ​​of -30 to -190 for adipose tissue.Results Eighty-four women included in the study. Most of the patients were normal or over-weighted. Invasive ductal carcinoma was the dominant histological subtypes, with 94% of the study population. The count of the sarcopenic and non-sarcopenic patients was 11 and 68 respectively. Although the median OS cannot be reached at the end of the follow-up period for both sarcopenic and non-sarcopenic patients, the difference between groups statistically insignificant. The median OS was not reached for both groups, the difference between low and high VAT groups was statistically significant.Conclusion In this study, we demonstrate sarcopenia may be seen in patients with breast cancer under 40 years old, and it may not have a prognostic effect.

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