scholarly journals Evaluating Profitability of Individual Timber Deliveries in the US South

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 437
Author(s):  
Joseph L. Conrad
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Gps Tracking ◽  
Hourly Wage ◽  
Us South ◽  
Wood Supply ◽  
The Us ◽  
Dependent Variables ◽  
The Relationship ◽  
Harvest Site

Timber transportation is an essential and often unprofitable segment of the wood supply chain. This study evaluated the profitability of individual timber deliveries for log truck owners in the US South. Origin and destination data were collected from 909 deliveries from 257 harvest sites. Travel time and distance were estimated using ArcGIS and GPS tracking. Monte Carlo Simulation was used to calculate 1000 unique combinations of payload, harvest site turn-time, mill turn-time, and percent-loaded km, yielding a dataset of 909,000 deliveries. Hauling costs and revenues for each delivery were estimated using published estimates. Driver wages were estimated in two ways: an hourly wage of $30.60 (USD) and 30% of the gross revenue from the load being delivered. Logistic regression was used to evaluate the relationship between six dependent variables and profitability. Only 14% of deliveries were profitable when the driver was paid an hourly wage versus 42% when the driver was paid 30% of gross revenue. Deliveries with one-way haul distances between 49 and 113 km (31–70 mi) were least likely to be profitable. Many deliveries could be profitable if logging businesses and mills reduced turn-times to under 20 min at mills and 30 min at harvest sites.

Geography and Country Music

2017 ◽  
Author(s):  
Jada Watson
Keyword(s):  
Rural Communities ◽  
Urban Communities ◽  
Country Music ◽  
Us South ◽  
Rural Landscapes ◽  
Community Values ◽  
The Us ◽  
The Relationship ◽  
Life Work

The concept of place is integral to country music, a genre associated with geographic regions, rural landscapes, and community values. While the genre has traditionally been described as a product of rural communities of the US South, studies have demonstrated the role that urban communities played in the birth of country music and its prominent scenes. Despite the growing interest in the relationship between music and place, many studies overlooked the important role that place-themed songs play in constructing an artist’s persona. With Canadian alt-country artist Corb Lund as a case study, this study draws literature from musicology, literary studies, and cultural geography to demonstrate how the singer-songwriter describes life, work, and sociocultural issues in Alberta to create diverse conceptions of place. It develops a framework for considering how artists use music to negotiate relationships to place and construct elements of their “geo-cultural” identity.

scholarly journals Militarization and police violence: The case of the 1033 program

2017 ◽  
Vol 4 (2) ◽  
pp. 205316801771288 ◽  
Author(s):  
Casey Delehanty ◽  
Jack Mewhirter ◽  
Ryan Welch ◽  
Jason Wilks
Keyword(s):  
Law Enforcement ◽  
Department Of Defense ◽  
Violent Behavior ◽  
Law Enforcement Agencies ◽  
Police Violence ◽  
Military Equipment ◽  
Multiple Dimensions ◽  
The Us ◽  
Dependent Variables ◽  
The Relationship

Does increased militarization of law enforcement agencies (LEAs) lead to an increase in violent behavior among officers? We theorize that the receipt of military equipment increases multiple dimensions of LEA militarization (material, cultural, organizational, and operational) and that such increases lead to more violent behavior. The US Department of Defense 1033 program makes excess military equipment, including weapons and vehicles, available to local LEAs. The variation in the amount of transferred equipment allows us to probe the relationship between military transfers and police violence. We estimate a series of regressions that test the effect of 1033 transfers on three dependent variables meant to capture police violence: the number of civilian casualties; the change in the number of civilian casualties; and the number of dogs killed by police. We find a positive and statistically significant relationship between 1033 transfers and fatalities from officer-involved shootings across all models.

Exit Condition for Probabilistic Assessment Using Monte Carlo Method

2010 ◽  
Vol 10 (1) ◽  
pp. 1-9
Author(s):  
Jakub Valihrach ◽  
Petr Konečný
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Optimization Design ◽  
Random Variable ◽  
Probability Of Failure ◽  
Probabilistic Assessment ◽  
Theoretical Derivation ◽  
The Monte Carlo Method ◽  
The Relationship

Exit Condition for Probabilistic Assessment Using Monte Carlo Method This paper introduces a condition used to exit a probabilistic assessment using the Monte Carlo simulation, and to evaluate it with regard to the relationship between the computed estimate of the probability of failure and the target design probability. The estimation of probability of failure is treated as a random variable, considering its variance that is dependent on the number of performed Monte Carlo simulation steps. After theoretical derivation of the decision condition, it is tested numerically with regard to its accuracy and computational efficiency. The condition is suitable for optimization design using the Monte Carlo method.

The Structure of Rejection: Implications of Sociometric Theory for Larger Groups

1994 ◽  
Vol 79 (2) ◽  
pp. 835-842 ◽  
Author(s):  
Donal E. Muir
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Group Analysis ◽  
The Other ◽  
Group Context ◽  
The Relationship

Established principles governing acceptance and rejection in dyads and triads are extended to larger groups by analyzing them as made up of such elements. In this larger-group context, a change in any dyad has direct implications for all triads involving that dyad and indirect implications for all triads containing any of the other dyads of those triads. Consequently, a change in the relationship between two individuals can produce effects cascading through the larger group. Analysis based on Monte Carlo simulation indicates that larger groups are more likely to attain sociometric stability when a preponderance of members are rejected, unless structured to encourage mutual acceptance.

CHARACTERISTIC AGE AND TRUE AGE OF PULSARS

2013 ◽  
Vol 23 ◽  
pp. 95-98
Author(s):  
LONG JIANG ◽  
CHENG-MIN ZHANG ◽  
ALI TANNI ◽  
HAI-HUI ZHAO
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Millisecond Pulsar ◽  
Spin Period ◽  
Field Evolution ◽  
Period Derivative ◽  
The Difference ◽  
The Relationship ◽  
The Magnetic Field

Age of a pulsar is a useful parameter, but it is difficult to get the age from observation. We can only derive the characteristic age from the observed parameters: spin period (P) and period derivative (Ṗ). In this paper, we discussed the relationship between characteristic age and magnetic field of a pulsar. Monte Carlo simulation is also used to support the idea: it is useless to study the magnetic field evolution using characteristic age. From some observation evidences we get that: the characteristic age cannot be used as true age, especially for millisecond pulsar (MSP). The difference between them is also discussed. From the studying of breaking index and MSP's initial spin period (P0), we get the conclusion that: the problem cannot be resolved using different radiation models.

An Examination of Tail Dependence in Bordeaux Futures Prices and Parker Ratings

2017 ◽  
Vol 12 (3) ◽  
pp. 252-266 ◽  
Author(s):  
Don Cyr ◽  
Lester Kwong ◽  
Ling Sun
Keyword(s):  
Monte Carlo Simulation ◽  
Risk Management ◽  
Monte Carlo ◽  
Tail Dependence ◽  
Copula Function ◽  
Bivariate Distribution ◽  
Nonlinear Relationship ◽  
Futures Prices ◽  
The Relationship ◽  
Jel Classifications

AbstractThis paper explores the nonlinearities of the bivariate distribution of Bordeaux en primeur, or wine futures, prices and Parker “barrel ratings” for the period of 2004 through 2010. In particular, copula-function methodology is introduced and employed to examine the nature of the bivariate distribution. Our results show a significant nonlinear relationship between Parker ratings and wine prices, characterized by significant positive tail dependence and higher correlation between high ratings and high prices. Marginal distributions for Parker ratings and wine prices are then identified and Monte Carlo simulation is employed to operationalize the relationship for risk-management purposes. (JEL Classifications: C19, G13, L66)

scholarly journals Application of Duration Measure in Quantifying the Sensitivity of Project Returns to Changes in Discount Rates

2019 ◽  
Vol 9 (1) ◽  
pp. 13
Author(s):  
Vahidreza Yousefi ◽  
Siamak Haji Yakhchali ◽  
Jolanta Tamošaitienė
Keyword(s):  
Monte Carlo Simulation ◽  
Risk Management ◽  
Monte Carlo ◽  
Project Management ◽  
Discount Rate ◽  
Construction Projects ◽  
Project Manager ◽  
Management Systems ◽  
Duration Measure ◽  
The Relationship

In this research, the concept of Duration with a new application in project management has been defined. The Duration of each project provides the project manager with a combined measure containing concepts of return, cost and time of the project. Further in this article, the changes in project return, based on different assumptions such as discount rate, have been examined. To examine the effect of the changes in these factors, the Monte Carlo simulation has been used. The relationship between these factors is nonlinear which reflects the great importance of investment on appropriate risk management systems. The data from a set of construction projects have been used in order to verify the results of this study. Similar relationships can be expected to exist in other industries as well.

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