scholarly journals Opportunities for the application of linear program­ming in forest management planning

2013 ◽  
pp. 175-191
Author(s):  
Damjan Pantic ◽  
Bojan Tubic ◽  
Marko Marinkovic ◽  
Dragan Borota ◽  
Snezana Obradovic
Keyword(s):  
Linear Programming ◽  
Maximum Yield ◽  
Half Period ◽  
Management Planning ◽  
Forest Management Planning ◽  
Conflicting Interests ◽  
Poplar Plantations ◽  
The One ◽  
Forest Practice ◽  
The U.S

In situations where it is necessary to consider a variety of options when making decisions in forestry (and in general), with the choice influenced by hardly comparable criteria and a number of conflicting interests, a possible solution is to use multiple criteria methods. One of these methods, which can be applied in forestry, is mathematical programming (in particular, linear programming). Linear programming has a long tradition of being used in the U.S. and European forestry, whereas in the forestry of Serbia it still represents a theoretically and practically unknown tool. Therefore, in this paper we analyze the possibility of applying the methods of linear programming in developing a plan of regeneration cutting in the poplar plantations of FMU "Topolik" managed by PE "Vojvodinasume." Using the aimed function (linear programming) and the corresponding software package the maximum yield that can be achieved by cutting the plantation was obtained. The planned management period was from 2012 to 2021 and its volume was 155 852 m3. The preset condition that the yield in half-periods remains equal was fulfilled (half-period I 77,925 m3, half-period II 77,927 m3). The maximum yield obtained with this methodology was by 4,040 m3 lower than the theoretically possible yield that would be obtained if all stands were cut down at the end of the second half-period, i.e. higher by 8,430 m3 than the yield that would be obtained if cutting of the stands were performed at the start of the management period. The results obtained and foreign experience in this area clearly indicate that linear programming can successfully be used to solve this problem and even more complex problems (than the one presented in this paper) in our local forest practice (multidimensional planning with a series of constraints).

Assessing the changing effects of forest harvesting on nature-based tourism: a case of sport-fishing tourism in Ontario, Canada

2013 ◽  
Vol 43 (2) ◽  
pp. 171-179 ◽  
Author(s):  
Len M. Hunt ◽  
Brian Kolman ◽  
Peter Boxall
Keyword(s):  
Forest Management ◽  
Forest Harvesting ◽  
Hedonic Price ◽  
Economic Activities ◽  
Negative Effects ◽  
Management Planning ◽  
Forest Management Planning ◽  
Hedonic Price Analysis ◽  
The One ◽  
Price Analysis

Forest harvesting can negatively affect nature-based tourism operations. Using observable and interpretable indicators of operating tourism establishments and associated prices charged for fishing packages, we illustrate how one can assess these forest harvesting effects. From a case of floatplane-accessible tourism in Ontario, Canada, we found no evidence to implicate recent (less than 10 years) forest harvests in decisions by tourism operators to close their establishments between 2000 and 2010. Using a hedonic price analysis, we found a significantly reduced effect of forest harvests on prices charged by these tourism operators between 2000 and 2010. These conclusions were robust to different specifications of forest harvesting. On the one hand, the results suggest that changes to forest management planning, policies, and practices in Ontario appear to have mitigated the negative effects from forest harvesting on nature-based tourism. On the other hand, the results show a method that other researchers and policy analysts can adopt to monitor the changing effects of forest management on economic activities such as nature-based tourism.

The Foundation

2017 ◽  
Author(s):  
Matthew K. Shannon
Keyword(s):  
International Education ◽  
The United States ◽  
Gulf Region ◽  
Governmental Organizations ◽  
Non Governmental Organizations ◽  
Conflicting Interests ◽  
The One ◽  
The Persian Gulf ◽  
Iranian Students ◽  
The U.S

This chapter analyses the efforts by the U.S. government and non-governmental organizations to establish educational programs and networks for Iranian students. It demonstrates how, on the one hand, Iranians who studied and received training in the United States were enmeshed in a transnational web of conflicting interests, torn between their concerns about Iran’s vanishing democracy and the economic development of their country. On the other hand, American proponents of international education were caught between an intensifying Iranian nationalism and Washington’s security interests in the Persian Gulf region.

scholarly journals A Study on the Feasibility of Anaerobic Co-Digestion of Raw Cheese Whey with Coffee Pulp Residues

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3611
Author(s):  
Sandra Gonzalez-Piedra ◽  
Héctor Hernández-García ◽  
Juan M. Perez-Morales ◽  
Laura Acosta-Domínguez ◽  
Juan-Rodrigo Bastidas-Oyanedel ◽  
...  
Keyword(s):  
Methane Production ◽  
Kinetic Models ◽  
Cheese Whey ◽  
Maximum Yield ◽  
Gompertz Model ◽  
Coffee Pulp ◽  
The One ◽  
The Cost ◽  
Best Fit ◽  
Cheese Production

In this paper, a study on the feasibility of the treatment of raw cheese whey by anaerobic co-digestion using coffee pulp residues as a co-substrate is presented. It considers raw whey generated in artisanal cheese markers, which is generally not treated, thus causing environmental pollution problems. An experimental design was carried out evaluating the effect of pH and the substrate ratio on methane production at 35 °C (i.e., mesophilic conditions). The interaction of the parameters on the co-substrate degradation and the methane production was analyzed using a response surface analysis. Furthermore, two kinetic models were proposed (first order and modified Gompertz models) to determine the dynamic profiles of methane yield. The results show that co-digestion of the raw whey is favored at pH = 6, reaching a maximum yield of 71.54 mLCH4 gVSrem−1 (31.5% VS removed) for raw cheese whey and coffee pulp ratio of 1 gVSwhey gVSCoffe−1. The proposed kinetic models successfully fit the experimental methane production data, the Gompertz model being the one that showed the best fit. Then, the results show that anaerobic co-digestion can be used to reduce the environmental impact of raw whey. Likewise, the methane obtained can be integrated into the cheese production process, which could contribute to reducing the cost per energy consumption.

Biracial American Colorism: Passing for White

2018 ◽  
Vol 62 (14) ◽  
pp. 2072-2086 ◽  
Author(s):  
Keshia L. Harris
Keyword(s):  
Native Americans ◽  
Family Income ◽  
Racial Groups ◽  
Science Literature ◽  
Racial Identification ◽  
Social Science Literature ◽  
And Gender ◽  
The One ◽  
Identification Processes ◽  
The U.S

Biracial Americans constitute a larger portion of the U.S. population than is often acknowledged. According to the U.S. Census, 8.4 million people or 2.6% of the population identified with two or more racial origins in 2016. Arguably, these numbers are misleading considering extensive occurrences of interracial pairings between Whites and minority racial groups throughout U.S. history. Many theorists posit that the hypodescent principle of colorism, colloquially known as “the one drop rule,” has influenced American racial socialization in such a way that numerous individuals primarily identify with one racial group despite having parents from two different racial backgrounds. While much of social science literature examines the racial identification processes of biracial Americans who identify with their minority heritage, this article focuses on contextual factors such as family income, neighborhood, religion, and gender that influence the decision for otherwise African/Asian/Latino/Native Americans to identify as White.

Developing and Implementing Multiple-Use Forest Management Planning in Turkey

2008 ◽  
Vol 42 (1) ◽  
pp. 37-48 ◽  
Author(s):  
Emin Zeki Baskent ◽  
Salih Terzioğlu ◽  
Şağdan Başkaya
Keyword(s):  
Forest Management ◽  
Multiple Use ◽  
Management Planning ◽  
Forest Management Planning

L'etica nella professione forense

2009 ◽  
pp. 163-172
Author(s):  
Angelo Abignente
Keyword(s):  
Public Interests ◽  
Legal Proceedings ◽  
Legal Professionals ◽  
Positive Law ◽  
Conflicting Interests ◽  
Discursive Participation ◽  
The Moment ◽  
The One ◽  
And Function ◽  
Role And Function

- The positive law tradition has hitherto had nothing to say about the legal profession's role and function, focusing more interest on questions of justice, of the legitimisation of power and of the genesis and organisation of normative material. This trend is now subject to a reversal promoted by new, neo-constitutionalist, narrativist, analytical and hermeneutic experiences, which no longer focuses attention on the moment when law is produced, but on the one when it is applied, reappraising and revitalising the function of the judge, of the attorneys and of other legal professionals. The attorney becomes an active protagonist, an intermediary not only between conflicting interests in a controversy, but also between opposing public interests, while the reappraisal of his role stimulates thinking about the ethical dimension of how the legal profession is practised. Referring to the theories of Habermas and of Alexy, the author treats the reasonable status of argumentation as the supreme ethical instance necessary for a decision that interferes in the sphere of another person's action. At the same time, however, the control of the reasonable status of the respective arguments on both sides is the ethical instance required of the attorneys taking part in the legal proceedings. It takes the form of compliance with the rules characteristic of the practical discourse, primarily the rule of free discursive participation that enables the onus of the argumentation to be explained. Ernesto de

scholarly journals Health care logistics: mapping and optimization of patients logistics

2021 ◽  
Vol 12 (8) ◽  
pp. 2161-2179
Author(s):  
Daiane Maria de Genaro Chiroli ◽  
Raíza Conde Coradazi ◽  
Fabio Jose Ceron Branco ◽  
Yslene Rocha Kachba ◽  
Franciely Velozo Aragão ◽  
...  
Keyword(s):  
Linear Programming ◽  
Computational Simulation ◽  
Transportation Of Patients ◽  
Patient Transport ◽  
Specific Approach ◽  
Health Region ◽  
The Third ◽  
City Hall ◽  
Pass Through ◽  
The One

Healthcare logistics play an important role in management, being attributed the activities of acquisition, distribution and movement of materials, professionals and patients. This work aims to develop a study, using the healthcare logistics in the movement of patients in the third health region of Paraná, proposing a linear programming problem that will pass through a computational simulation, considering the existing demands and constraints in the system, aiming to optimize the flow of patients from this region. The present study developed four mathematical models, based on demands and constraints followed by linear programming in order to find the best possible solution for the flow of patients from the third health region of the state of Paraná. The study developed reached its goal of optimization, generating an economy in the transportation of patients. Through the analysis of the results, it is concluded that the model that best suits the presented problem is the one of costs minimization, since the one of vehicles presented higher costs. Possibly the model that minimizes the vehicles would bring better results if the vehicles were not outsourced, but of the Ponta Grossa City Hall (PMPG). Was possible to verify the importance of the theme, especially when referring to the flow of patients in the health services due to the lack of studies with this specific approach. Even with the scarcity of data, it is possible to notice the potential for improvements on this patient transport system.

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