Volume Tables Research Articles

Table of Content Volume 57, Number 9, September 2018

Table of Content Volume 57, Number 9, September 2018

Developing local volume tables for three important tree species in Nawalparasi and Kapilvastu districts

The local volume tables of specific species are very important to estimate the timber volume of standing trees but precise site-specific volume tables are lacking for three important tree species, namely Dalbergia sissoo, Shorea robusta and Terminalia alata. Therefore, this study was carried out to develop local volume tables and determine the form factors of these species using destructive and non-destructive methods. Kapilvastu and Nawalparasi districts were selected for this study. Altogether, 188 vigorous trees were selected for measurement, out of which 156 (52 trees for each species) were from destructive sampling and 32 were standing trees. The data of destructive sampling trees of three species were used in developing the models for under bark timber volume up to 10 and 20 cm top diameters. Thirty two data (12 for S. robusta, 10 for T. alata and for D. sissoo each) of standing trees were used to validate the models of three species. A number of cross sections were made and actual volumes of stem, butt log, other sections and top portion were calculated using cylindrical, Newton’s, Smalian’s and cone formulae, respectively. The cylindrical volume was estimated based on diameter at breast height. The form factor was determined from the ratio of actual and cylindrical volumes. The diameter and height relationship was made and, based on this; the smooth curve was drawn to develop the local volume tables. The results showed that estimated form factor of 10 cm and 20 cm top diameter of selected species varied from 0.50 to 0.69. In addition, local volume tables are developed for stem volume based on diameter under bark. Banko JanakariA Journal of Forestry Information for Nepal Special Issue No. 4, 2018, Page: 84-91

A fast method for determination of creep forces in non-Hertzian contact of wheel and rail based on a book of tables

The Kalker book of tables for non-Hertzian contact described in a previous work from the authors provides creep forces, but the moment generated in the contact patch is not available. The extended Kalker book of tables for non-Hertzian contact (KBTNH) presented in this paper provides creep forces, as well as the moment. The paper presents the simplified linear theory of rolling contact for a simple double-elliptical contact (SDEC) region used for regularisation of contact patches and, resulting from this theory, the full symmetry relations for creep forces and moment. The parameterisation of variables and structure of the extended book of tables are described. The extended Kalker book of tables of moderate volume has been computed in co-simulation Matlab-CONTACT. The creep forces and moment obtained from KBTNH have been compared to those obtained directly by CONTACT program and FASTSIM algorithm. The comparison shows that KBTNH is in good agreement with CONTACT for a wide range of creepage conditions and shapes of the contact patch, whereas the use of FASTSIM may lead to significant deviations from the reference CONTACT solutions. The presented example of application is a realistic case of a freight wagon curving simulation, where KBTNH has been used to assess the contribution of the moment into the unit frictional work dissipated in contacts of wheels and rails. The high calculation speed and good accuracy of determining creep forces for non-Hertzian wheel–rail contact make the proposed method a suitable tool for multibody system (MBS) simulation programs oriented for rail vehicle dynamics.

Table of Content Volume 57, Number 8, August 2018

Genes, Chromosomes and CancerVolume 57, Issue 8 p. 377-378 ISSUE INFORMATION - TOCFree Access Table of Content Volume 57, Number 8, August 2018 First published: 26 June 2018 https://doi.org/10.1002/gcc.22496AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume57, Issue8August 2018Pages 377-378 RelatedInformation

"Development of Volume Function for Final Felling of Pinus brutia Ten in Kurdistan Iraq"

Planning for forest management depends upon the forest dynamics, which includes integration of all forest disciplines and understanding of forest resource characteristics including its growth dynamics. The forest growth and yield modelling can provide valuable information about forestry which can be used to determine harvest levels or allowable cut, and to analyze alternative stand treatments. Growth and yield models are generally used to predict the temporal development of forest stands. Knowledge of Diameter at Breast Height (DBH) and total tree height is fundamental to both developing and applying many growth and yield models [1]. Among the several available approaches in the yield prediction methodology, the multilevel model approach, which is a statistical technique, found to be commonly used in many fields of study for generating improvements in parameter estimation .A volume estimation of a forest stand is a good example. Volume estimation in the form of volume function and volume table has been widely used for many different purposes in forestry for more that hundred years including forest plantations and an inventory for timber harvesting. In view of the importance of these functions in forestry, this study was conducted with the main aim to develop a volume function for Pinus brutia Ten, which is a very common forest tree species planted in northern Iraq. The least squares method was used to fit eight unweighted volume equations including two logarithmic transformed equations and seven weighted forms of volume equations to volume data of a 25-30 years old Pinus brutia Ten plantation. The best fit equation was done using Furnival’s index.

Table of Content Volume 57, Number 7, July 2018

Table of Content Volume 57, Number 7, July 2018

Table of Content Volume 57, Number 6, June 2018

Genes, Chromosomes and CancerVolume 57, Issue 6 p. 279-280 ISSUE INFORMATION - TOCFree Access Table of Content Volume 57, Number 6, June 2018 First published: 15 April 2018 https://doi.org/10.1002/gcc.22494AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume57, Issue6June 2018Pages 279-280 RelatedInformation

Abstract 025: Cross-sectional Relations of Serum Cortisol and Cognitive and Structural Brain Measures in Young Adults: The Framingham Heart Study

Introduction: Chronic stress and related changes in serum cortisol have adverse effects on brain structure and cognition in animal models. However, evidence from population-based studies is scant. We assessed the association of early morning serum cortisol with cognition and brain structural integrity in middle-aged adults without dementia. Hypotheses: High or low levels of serum cortisol are associated with lower cognitive performance and brain volumes. Methods: We evaluated dementia-free Framingham Study (Generation 3) participants (mean age 48.5 years; 46.8% men), who underwent cognitive testing of memory, abstract reasoning, visual perception, attention, and executive function (n= 2231), and brain MRI (n=2018) to assess total white matter, lobar gray matter, and white matter hyperintensity volumes and fractional anisotropy (FA) measures. We used linear or logistic (cortisol categorized in tertiles, middle tertile as the reference) regression to assess the relations of cortisol with cognition, MRI volumes and voxel-based microstructural white matter integrity and gray matter density, adjusting for age, sex, APOE and vascular risk factors. Results: Higher cortisol (highest tertile vs. middle tertile) was associated with worse memory and visual perception, as well as lower total cerebral brain, occipital and frontal lobar gray matter volumes (Table ) . Higher cortisol was associated with multiple areas of microstructural changes on voxel-based analyses (gray matter density and FA). The association of cortisol with total cerebral brain volume varied by sex ( Pinteraction =0.048 , highest cortisol tertile inversely associated with cerebral brain volume in women [ P= 0.001] but not in men [ P =0.717]). There was no effect modification by the apoE4 genotype of the relations of cortisol and cognition or imaging traits. Conclusions: Higher serum cortisol was associated with lower brain volumes and impaired memory in asymptomatic young adults in their forties; women may be particularly susceptible to this influence.

Table of Content Volume 57, Number 5, May 2018

Table of Content Volume 57, Number 5, May 2018

Table of Content Volume 57, Number 4, April 2018

Table of Content Volume 57, Number 4, April 2018

STANDARDS FOR DETERMINING OF GROWING STOCK AND DIMENSIONAL-QUALITATIVE STRUCTURE OF MATURE AND OVERMATURE COPPICE OAK FOREST STANDS

The results of the study of solid-volume/stacked-volume ratio, the relationship between heights and diameters, as well as the dimensional and qualitative structure of oak stems in mature and overmature forest stands are presented. Correlation analysis is performed and interrelations between taxation indicators are evaluated. Mathematical models of height, form factor and dimensional-qualitative structure of tree stems were developed, on the basis of which volume tables, a class scale of heights and tables of the dimensional and qualitative structure of tree oak stands were constructed. It was established that the percentage of output of coarse, medium and small merchantable wood, firewood and waste wood doesn’t significantly depend on the class of heights. Comparison of the developed standards with the current ones showed that the yield of commercial timber according to the results of the conducted study is 5% on average, and that of coarse commercial wood for stems with a diameter of more than 48 cm is 3-8% less than the current standards.

Table of Content Volume 57, Number 3, March 2018

Table of Content Volume 57, Number 3, March 2018

Consolidated Table of Cases Volumes 126-175: Arranged Alphabetically

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Issues in Informing Science and Information Technology - Table of Contents Volume 15, 2018

Table of Contents for IISIT Volume 15, 2018

Volume Table of Contents

Volume Table of Contents

우리나라 소나무의 수간곡선식 추정에 의한 탄소저장량 및 흡수량 산정

This study was conducted to estimate carbon stocks of Pinus densiflora with drawing volume of trees in each tree height and DBH applying the suitable stem taper equation and tree specific carbon emission factors, using collected growth data from all over the country. Information on distribution area, tree age, tree number per hectare, tree volume and volume stocks were obtained from the 5th National Forest Inventory (2006∼2010) and Statistical yearbook of forest (2016), and method provided in IPCC GPG was applied to estimate carbon stock and uptake. Performance in predicting stem diameter at a specific point along a stem in Pinus densiflora by applying Kozak’s model, (수식 본문참조), which is well known equation in stem taper estimation, was evaluated with validations statistics, Fitness Index, Bias and Standard Error of Bias. Consequently, Kozak’s model turned out to be suitable in all validations statistics. Stem volume table of P. densiflora was derived by applying Kozak’s model and carbon stock tables in each tree height and DBH were developed with country-specific carbon emission factors (WD = 0.445 t/㎥, BEF = 1.445, R = 0.255) of P. densiflora. As the results of analysis in carbon uptake for each province, the values were high with Gangwon-do 9.4 tCO2/ha/yr, Gyeongsandnam-do and Gyeonggi-do 8.7 tCO₂/㏊/yr, Chungcheongnam-do 7.9 tCO₂/㏊/yr and Gyeongsangbuk-do 7.8 tCO₂/㏊/yr in order, and Jeju-do was the lowest with 6.8 tC/㏊/yr. Total carbon stocks of P. densiflora were 127,677 thousands tC which is 25.5% compared with total percentage of forest and carbon stock per hectare (ha) was 84.5 tC/㏊ and 7.8 tCO₂/㏊/yr, respectively.

Table of Content Volume 57, Number 2, February 2018

Table of Content Volume 57, Number 2, February 2018

End of Volume Table of Contents

End of Volume Table of Contents

SELECTION OF REGRESSION MODELS FOR GRAPHICALLY DETERMINED SITE CLASS CURVES FOR FIR IN UNEVEN-AGED STANDS IN BOSNIA AND HERCEGOVINA

UDK: 630*54:582.475(497.6)
 In expert activities of forest managements, the forest stand volume is most frequently determined by way of volume tables, the so-called management tariffs. For an evaluation of stand volume using this method, the method of volume tables, it is necessary to know the site class (rating) of the stand for present tree species that is used as an argument for the selection of suitable volume progression (management tariff). The site quality for certain species in mixed stands is determined by comparing the height of trees at certain diameters at breast height (dbh) with the height of appropriate dispositions of height site class curves. In so doing the focus is placed on the ratio between the heights of large diameter trees, and the quality of the stand is rated within an interval of more defined site quality classes. For the purposes of a more objective and simpler assessment of site quality, there have recently been attempts to make site quality assessments mathematically, using appropriate formulas in which tree heights or average heights by diameter classes and heights determined by mathematical functions of site class curves are used. For economically important tree species in Bosnia and Herzegovina (fir, spruce, beech, sessile oak, black pine and scots pine), the dispositions of height site class curves (and classes) are constructed graphically and mathematical functions for them are not known. A large number of mathematical models that are often used to represent growth trends and that satisfy the needs of height curves is analyzed in this paper with a view to determining the most suitable regression model for simulating height site class curves for fir in high forests in Bosnia and Herzegovina. The expanded Prodan model (with an additional item in the denominator) has been selected as the most suitable one on the basis of statistical indicators of the regression model quality.

Table of Content Volume 57, Number 1, January 2018

Genes, Chromosomes and CancerVolume 57, Issue 1 p. 1-2 ISSUE INFORMATION - TOCFree Access Table of Content Volume 57, Number 1, January 2018 First published: 15 November 2017 https://doi.org/10.1002/gcc.22489AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume57, Issue1January 2018Pages 1-2 RelatedInformation