scholarly journals LAJU ANGKUTAN SEDIMEN MELAYANG DI SUNGAI WIMBI SUB DAS WIMBI KABUPATEN POSO

2021 ◽  
Vol 9 (1) ◽  
pp. 43
Author(s):  
Herman Harijanto ◽  
Abdul Wahid ◽  
Arief Sudhartono ◽  
Nikteri Perori
Keyword(s):  
River Water ◽  
Cross Section ◽  
Loading Rate ◽  
Water Discharge ◽  
Survey Method ◽  
Water Runoff ◽  
Sediment Loading ◽  
Sediment Discharge ◽  
The Cross ◽  
The Relationship

The research purpose was to determine of floating sediment loading rate which transported along Wimbi river water runoff and analyzed the relationship between water discharge with floating sediment discharge in the Wimbi river. The method used in this study was a survey method, namely by conducting direct measurements in the field, including: measurement of water discharge and water sampling for analysis of floating sediment content. Parameter  measured for the purpose of analyzing the sediment loading rate, namely floating sediment concentration Cs (mg / l), river water discharge Q (m3 / sec) and floating sediment discharge Qs (kg / sec). The relationship between water discharge and sediment discharge was analyzed using a suspended sediment rating curve. The results showed the flow of river water flowing at the cross section of the Wimbi river ranged from 0.88 m3 / sec - 13.7 m3 / sec (average of 6.17 m3 / sec). Furthermore, the height of the water level (H) flowing in the cross section of the Wimbi river ranged from 0.5 to 1.84 m with  average = 1.14m. Sediment loading rates float in the Wimbi river ranged from 2.110 - 99.511kg / sec (average of 35.222 kg / sec). The analyzed results of the relationship between water discharge and floating sediment discharge obtained a positive relationship with a correlation value of 0.96.

Optimization Analysis of the Wedge Block Surface of NYD Contact Backstop

2013 ◽  
Vol 433-435 ◽  
pp. 2277-2281
Author(s):  
Quan Wei Wang ◽  
Ming Hui Wang ◽  
Dong Li ◽  
Dian Mao Wan ◽  
Rong Meng
Keyword(s):  
Cross Section ◽  
Design Parameters ◽  
Optimization Analysis ◽  
Archimedes Spiral ◽  
The Cross ◽  
Section Curve ◽  
Relationship Of ◽  
The Relationship

By analyzing the relationship of the design parameters of NYD contact backstop, the cross-section curve of the wedge block has been discussed as Archimedes spiral, logarithm spiral and arc. Each curve is designed optimally using MATLAB optimization toolbox. The merits and drawbacks of each curve are discussed.

scholarly journals Influence of varietal features of rootstock and scion varieties on specific water transmissibility of grape cuttings and seedlings

2020 ◽  
pp. 116-119
Author(s):  
Вячеслав Иосифович Иванченко ◽  
Дмитрий Валериевич Потанин ◽  
Антон Юрьевич Зотиков ◽  
Пётр Пантелеевич Радчевский
Keyword(s):  
Cross Section ◽  
Functional Activity ◽  
Comparative Assessment ◽  
Zonal Distribution ◽  
The Cross ◽  
The Relationship ◽  
Conductive System

В статье описывается новый анатомический метод изучения проводящей системы привоя и подвоя винограда. Дается сравнительная оценка подвойным, привойным черенкам и саженцам винограда на основе значений удельной водопроводимости тканей древесины. Установлено превалирование проводящей системы подвойных сортов над привойными сортами и саженцами винограда. Показана зональность поперечного сечения с большей функциональной активностью проводящих сосудов. Установлена тенденция в зависимости значений удельной водопроводимости тканей древесины и таких сортовых признаков подвоев как сила роста и карбонатоустойчивость. Определена взаимосвязь между показателями развития тканей подвойных, привойных сортов и саженцев винограда, удельной водопроводимостью тканей древесины. The article describes new anatomical method of study of the conductive system of scion and rootstock of grapes. A comparative assessment was given for rootstock, scion and grape seedlings based on the values of the specific water transmissibility of xylem tissues. The predominance of the conductive system of rootstock varieties over scion varieties and grape seedlings was established. Zonal distribution of the cross-section with greater functional activity of conductive vessels was shown. Dependence of values of the specific water transmissibility of xylem tissues on such varietal characteristics of rootstocks as strength of growth and carbon stability was established. The relationship between the parameters of development of rootstock, scion and seedling tissues and the specific water transmissibility of xylem tissues was determined.

scholarly journals The relationship between the arrangement of rays in secondary phloem and grain inclination in the wood of Pinus silyestris L. and Picea abies Karst

2014 ◽  
Vol 59 (1-4) ◽  
pp. 9-24
Author(s):  
Władysław Pyszyński
Keyword(s):  
Picea Abies ◽  
Cross Section ◽  
Cross Sections ◽  
Pinus Silvestris ◽  
Secondary Phloem ◽  
The Cross ◽  
Wood Grain ◽  
The Right ◽  
The Relationship ◽  
Wood Columns

The arrangement of rays in cross sections of secondary phloem and the wood grain on the tangential and radial surfaces of wood columns from <i>Pinus silvestris</i> and <i>Picea abies</i> was studied. It was found that in most cases the rays were slanted and deviated from the geometric radius in either the S-direction (to the left) or in the Z-direction (to the right) when the cross section of the stem was observed from above. The S-type deviation dominated in those stems in which the wood grain in the peripheral parts was of the S-type (left-oriented), whereas the deviation of rays in the Z-direction was found to dominate in those objects, in which the wood grain in the peripheral parts of the stem was of the Z-type (right-oriented).

scholarly journals Hydrological and suspended sediment regime in the Kolubara River during the extreme year of 2014

2016 ◽  
Vol 18 (1) ◽  
pp. 32-46 ◽  
Author(s):  
Slavoljub DRAGIĆEVIĆ ◽  
Nenad ŽIVKOVIĆ ◽  
Ivan NOVKOVIĆ ◽  
Ana PETROVIĆ ◽  
Radislav TOŠIĆ ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Water Discharge ◽  
Suspended Sediment Transport ◽  
Water Runoff ◽  
Sediment Discharge ◽  
Daily Discharge ◽  
Large Water ◽  
Climate Events ◽  
Large Discharge

The previous methodology of sampling and determining the suspended sediment con­cen­tration (SSC) in the rivers of Serbia is characterized by a number of disadvantages, so that any re­search of this kind has a large water management impact. In the largest number of hydrological stations in Serbia, daily SSC were obtained based on only one sampling, which raises the question of the representativeness of such sample. Previous SSC – water discharge relationship and detailed analyses of errors in calculating the suspended sediment transport on the profile of Draževac were done for the year of 2004, when the annual difference was very high, which required a very detailed ana­lysis and methodological improvements. In order to define the sediment regime in the Kolubara River, precise monitoring of SSC has been implemented since 2013. The Kolubara River has an unfavourable water regime which is reflected in the excessiveness of water runoff, with floods that are sudden, expressive and short-term, and long-term low waters, so, that are why it is cha­rac­terized by a large discharge and SSC variability. Incidentally, monitoring also covered the year of 2014, when the area of western Serbia (in particular the Kolubara River Basin) was under the influence of extreme climate events that strongly reflected on the hydrological condition with the absolute highest daily discharge. A total of 220 water samples were collected on Draževac gauging station in 2014, in order to determine SSC and sediment discharge. The total number of days covered was 206, which means that there were even more samplings per day, when the discharge was changing fast. The minimal daily measured SSC was only 0.0016 g/l and the maxi­mal recorded value of SSC was 2.6122 g/l and was measured in May at the water discharge of 1 260 m3/s. Тhe total amount of sus­pended sediment discharge at the profile of Draževac in 2014 was 1 104 435 t (the spe­ci­fic suspended sediment yield – 308 t/sqkm/yr). The main objective of this study is to improve SSC – water discharge relationship in the Kolubara River based on the extreme hydrological conditions in 2014.

scholarly journals Distributed Magnetic Flux Density on the Cross-Section of a Transformer Core

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 297 ◽  
Author(s):  
Lingzhi Li ◽  
Xuhao Du ◽  
Jie Pan ◽  
Adrian Keating ◽  
David Matthews ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Cross Section ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
The Core ◽  
The Cross ◽  
Flux Density Distribution ◽  
Transformer Core ◽  
The Relationship

In this paper, the magnetic flux density distribution on the cross-sections of a transformer core is studied. The core for this study consists of two identical U-shaped cores joint at their open surfaces with known air gaps. The magnetic flux density at one of their joint boundary surfaces was measured for different air gaps. A finite element model (FEM) was built to simulate the magnetic flux density and compared with experiment data. Using the validated FEM, the distributed magnetic flux density on the cross-section of the core structure can be obtained when the air gap approaches zero. An engineering model of the density based on the Ampere’s circuit law was also developed and used to explain the relationship between air gap and mean magnetic flux density on the cross-section. The magnetic flux density on the cross-section was found to have a convex-shaped distribution and could be described by an empirical formula. Using this approach, the magnetic flux density distribution in cores with different interlayer insulation was obtained and discussed. This method could also examine the leakage of magnetic flux density in the air gap region when the distance is non-zero, and the relationship between the leakage field and the field in the core structure. The proposed method and model can provide a more detailed understanding for the magnetic field of transformer cores and potential application in designing quiet transformers and condition monitoring.

scholarly journals Simulation of local head loss of drip-irrigation tape with integrated in-line emitters as a function of cross section

2020 ◽  
Vol 18 (4) ◽  
pp. e0210
Author(s):  
Yalin Wang ◽  
Xueliang Ju ◽  
Shijiang Zhu ◽  
Meng Li
Keyword(s):  
Cross Section ◽  
Drip Irrigation ◽  
Low Pressure ◽  
Head Loss ◽  
Three Gorges ◽  
Cross Sectional ◽  
Water Conservancy ◽  
The Cross ◽  
Sectional Shape ◽  
The Relationship

Aim of study: To investigate how the cross section of a drip-irrigation tape affects local head loss.Area of study: The work was carried out in the laboratory of Irrigation hydraulics, College of Water Conservancy and Environment, Three Gorges University, Yichang, Hubei province.Material and methods: Tapes with six different wall thicknesses were studied experimentally to determine the relationship between cross-section deformation, wall thickness, and pressure. Based on the experimental results, we determined the factors that influence local head loss in drip-irrigation tapes by numerical simulation and dimensional analysis.Main results: The cross-sectional shape of the drip-irrigation tape varied with pressure: under low pressure, the cross section was nearly elliptical. The cross-sectional shape of the tape strongly influenced the local head loss, which was inversely proportional to the 0.867th power of the flattening coefficient of the drip irrigation tape. We expressed the local head loss of a drip-irrigation tape equipped with integrated in-line emitters by considering the deformation of the cross section. Under the conditions used in this study, when the cross section is circular, the ratio of local head loss to frictional head loss was about 10% but, when the cross section is elliptical, this ratio increased to 15%.Research highlights: The shape of the cross section of a drip-irrigation tape is nearly elliptical under low pressure. Local head loss is inversely proportional to the 0.867th power of that is the flatting coefficient of the drip-irrigation tape. Local head loss is about 1.5 times for elliptical tape than circular tape.

Are herding transmissions in the gulf cooperation council stock markets regional or international?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dina Gabbori ◽  
Basel Awartani ◽  
Aktham I. Maghyereh ◽  
Nader Virk
Keyword(s):  
Cross Section ◽  
Stock Markets ◽  
Equity Market ◽  
Short Term ◽  
Absolute Deviation ◽  
Content Type ◽  
Market Return ◽  
The Us ◽  
The Cross ◽  
The Relationship

PurposeThe authors aim to assess whether herding in GCC stock markets is more responsive to global dynamics than its response to regional developments. To do so, they use the largest equity market in the region which is Saudi Arabia as the benchmark, and then they examine if herding crosses from this large regional market to the rest of equities in the neighboring markets during various time periods. To compare the importance of global influences on herding, the authors investigate and compare the impact of the information flow from the US equity market on the herding of equities in the GCC markets.Design/methodology/approachTo investigate herding in GCC markets the authors use the relationship between the squared market return and the cross-section absolute deviation that does not covary with market styles and/or fundamentals. In order to do that we follow Galariotis et al. (2015) and account for four styles: market-oriented, small-cap, value and momentum. As these factors have been shown to be associated with the economic fundamentals, filtering the covariance of deviation with these factors is expected to remove the style and the fundamental herding influence from the value of the dispersion.FindingsThe results show significant herding behavior that persists across various independent periods. This evidence stands even when the authors control for the well- known factor structures in stock returns. Importantly, the authors find that the few herding crossovers that occurred during the sample period are more likely to originate from the Saudi market rather than from the US. Therefore, the authors conclude that behavioral inefficiencies in the GCC equity markets are likely to be regional and that the sentiment-based trading in the US has essentially a minimal role to play.Practical implicationsThe empirical findings are useful for policymakers who aim at preventing market manipulation in order to preserve the integrity of financial markets. Policymakers in the GCC should disclose more information to aid investors so they do not rely on other investors' trades. The portfolio managers should be aware that the correlation of GCC equities can be higher in the short term due to common market herding in these countries. As the US market does not play an important role in triggering behavioral irrationalities in these markets, investing in GCC equities is a good hedge in a US portfolio. Finally, the results have also important implications for active funds that aim to exploit short-term trending in markets in order to enhance performance.Originality/valueThe authors’ contribution in this paper is to investigate herding in GCC markets by using the relationship between the squared market return and the cross-section absolute deviation that does not covary with market styles and/or fundamentals. Another contribution of our paper is to investigate any cross herding from the Saudi market to the rest of the markets in the area. The previous literature on GCC equity market herding is silent on this issue and it is typically restricted to the level of the single market.

scholarly journals Short communication: Field data imply that the sorting (<i>D</i><sub>96</sub> / <i>D</i><sub>50</sub> ratios) of gravel bars in coarse-grained streams influences the probability of sediment transport

2020 ◽  
Author(s):  
Fritz Schlunegger ◽  
Romain Delunel ◽  
Philippos Garefalakis
Keyword(s):  
Water Discharge ◽  
Bedload Transport ◽  
Swiss Alps ◽  
Coarse Grained ◽  
Water Runoff ◽  
Shear Stresses ◽  
Sediment Discharge ◽  
Peruvian Andes ◽  
Gravel Bars ◽  
Bed Material

Abstract. Conceptual models suggest that the mobility of fluvial gravel bars is mainly controlled by sediment discharge. Here we present field observations from streams in the Swiss Alps and the Peruvian Andes to document that for a given water runoff, the probability of bedload transport also depends on the sorting of the bed material. We calculate shear stresses that are expected for a mean annual water discharge, and compare these estimates with grain-specific thresholds. We find a positive correlation between the predicted probability of transport and the sorting of the bed material, expressed by the D96 / D50 ratio. These results suggest that besides sediment discharge, the bedload sorting exerts a measurable control on the gravel bar mobility.

scholarly journals Idiosyncratic Volatility and Cross-section of Stock Returns: Evidences from India

2016 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Prashant Sharma ◽  
Brajesh Kumar
Keyword(s):  
Stock Returns ◽  
Cross Section ◽  
Empirical Relationship ◽  
Idiosyncratic Volatility ◽  
Expected Returns ◽  
Cross Sectional ◽  
The Cross ◽  
Highly Correlated ◽  
Indian Stock Market ◽  
The Relationship

<p>The present study examines the cross-sectional pricing ability of idiosyncratic volatility (IV) in Indian stock market and investigates the relationship amongst expected idiosyncratic volatility (EI), unexpected idiosyncratic volatility (UI), and cross-section of stocks returns. The study uses ARIMA (2, 0, 1) model to IV into EI and UI. The stocks returns are regressed on IV, EI and UI using Newey-West (1987) corrections, in order to investigate their empirical relationship.  The study finds that IV is positively related with stock returns. Further the IV significantly explains the cross-section of stock returns in Indian context. After imposing control over UI, as it is highly correlated with unexpected returns, the inter-temporal relationship between EI and expected returns turns out to be positive.</p>

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