The evolution of aggression: can selection generate variability?

1988 ◽  
Vol 319 (1196) ◽  
pp. 557-570 ◽  
Keyword(s):  
Natural Selection ◽  
Genetic Variability ◽  
Honest Signalling ◽  
War Of Attrition ◽  
The Third ◽  
Costly Traits ◽  
The Cost ◽  
Age And Sex

Three models - the war of attrition, the size game and the badges of dominance game - are described, in which natural selection can maintain genetic variability for aggression. The models differ in whether or not the traits that settle contests are costly in contexts other than fighting, and also in whether signals are used. It is concluded that contests will be settled by non-costly traits only if the value of the contested resource is small relative to the cost of fighting, and that ‘honest’ signalling of aggressiveness is stable only if individuals giving signals that are inconsistent with their behaviour suffer costs. The literature on ‘badges of dominance’ in birds is reviewed. New data on great tits, greenfinches and corn buntings show that there is plumage variability within age and sex that sometimes serves to settle contests, and that, in the first two species but not the third, the badges are uncorrelated with size, and settle contests only over trivial resources.

scholarly journals The costs of functional gastrointestinal disorders and related signs and symptoms in infants: a systematic literature review and cost calculation for England

BMJ Open ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. e015594 ◽  
Author(s):  
James Mahon ◽  
Carlos Lifschitz ◽  
Thomas Ludwig ◽  
Nikhil Thapar ◽  
Julie Glanville ◽  
...  
Keyword(s):  
Literature Review ◽  
Systematic Literature Review ◽  
Functional Gastrointestinal Disorders ◽  
Signs And Symptoms ◽  
Third Party ◽  
Gastrointestinal Disorders ◽  
Over The Counter ◽  
Party Payer ◽  
The Third ◽  
The Cost

ObjectivesTo estimate the cost of functional gastrointestinal disorders (FGIDs) and related signs and symptoms in infants to the third party payer and to parents.Study designTo estimate the cost of illness (COI) of infant FGIDs, a two-stage process was applied: a systematic literature review and a COI calculation. As no pertinent papers were found in the systematic literature review, a ‘de novo’ analysis was performed. For the latter, the potential costs for the third party payer (the National Health Service (NHS) in England) and for parents/carers for the treatment of FGIDs in infants were calculated, by using publicly available data. In constructing the calculation, estimates and assumptions (where necessary) were chosen to provide a lower bound (minimum) of the potential overall cost. In doing so, the interpretation of the calculation is that the true COI can be no lower than that estimated.ResultsOur calculation estimated that the total costs of treating FGIDs in infants in England were at least £72.3 million per year in 2014/2015 of which £49.1 million was NHS expenditure on prescriptions, community care and hospital treatment. Parents incurred £23.2 million in costs through purchase of over the counter remedies.ConclusionsThe total cost presented here is likely to be a significant underestimate as only lower bound estimates were used where applicable, and for example, costs of alternative therapies, inpatient treatments or diagnostic tests, and time off work by parents could not be adequately estimated and were omitted from the calculation. The number and kind of prescribed products and products sold over the counter to treat FGIDs suggest that there are gaps between treatment guidelines, which emphasise parental reassurance and nutritional advice, and their implementation.

scholarly journals PELATIHAN DAN SOSIALISASI SISTEM INFORMASI KEUANGAN PADA SEKOLAH ISLAM TERPADU PEKANBARU

2018 ◽  
Vol 2 (2) ◽  
pp. 211-219
Author(s):  
Wenni Syafitri ◽  
Muhamad Sadar ◽  
Eddisyah Putra Pane
Keyword(s):  
Basic Education ◽  
Reporting System ◽  
Education Practice ◽  
The Third ◽  
Poor Students ◽  
Cost Of Education ◽  
Third Stage ◽  
The Government ◽  
Reporting Mechanism ◽  
The Cost

SMP IT Madani as one of the schools that apply the concept of islamic in its education practice. SMPIT Madani is a school formed by amil zakat self-supporting institution ummah Riau by using theconcept of free school. SMP IT stands in 2011 with a total of 20 students. Over time, the currentnumber of junior Madani IT students amounted to 75 students. The average students who attendjunior high school IT is the students who come from poor families.SMP IT Madani has received School Operational Assistance (BOS) a few years back. The BOSprogram uses a different approach than Special Assistance for Students (BKM) ie BOS funds are notgiven to poor students but are provided to schools and managed by schools. The mechanism forcalculating BOS funds is based on the number of students in each school. So the goal of this BOScan be achieved is to free the cost of education for poor students or not able and can alleviate forother students so they can get 9 years basic education services.The obligations of schools receiving BOS programs should report the realization of the use of theprogram to the government. Currently schools are having difficulties to make reporting realizationof BOS program to government and foundation. Differences in reporting formats to foundations andgovernments make the school experience serious problems. If it does not sync between reportingbetween the government and the foundation will cause many other questions and problems. Wheninterviewed, the school is very eager for this matter to be resolved immediately.Based on the problems of the partners, it can be concluded the solution of the problem is a reportinginformation system synchronized to the government and the foundation. So that SMP IT Madani nolonger experience obstacles to the reporting of BOS program activities. As a result the name ofUnilak increasingly fragrant in the eyes of society, especially SMP IT Madani.Method of implementation of activities used is direct observation to the location of partners toperform the first phase, this stage includes data collection and data processing. When this stage takesplace, we will get an overview of the Information Technology environment, and the partner's needfor the BOS program reporting mechanism. After the first phase is done, it will be held the secondphase of socialization, this stage to do the sosiasisasi about the benefits of synchronizing BOSreporting to the government and the foundation. Then in the third stage, the authors do the designand implementation of BOS reporting system based on information obtained from the foundation.Finally, the training phase: Each partner school sends its representative two people, to attend trainingon the use of reporting system that can synchronize BOS and foundation reporting.

scholarly journals A THEORY OF AGENCY LAW

2011 ◽  
Vol 72 (3) ◽  
Author(s):  
Paula J Dalley
Keyword(s):  
Cost Benefit ◽  
Modern World ◽  
Unified Theory ◽  
Internalization Theory ◽  
Agency Relationship ◽  
The Third ◽  
The Law ◽  
The Cost ◽  
To Receive

Despite the ubiquity of agents in the modern world, agency law does not have a coherent explanation or unified theory. The Restatement (Third) of Agency updates and attempts to explain the law, but its explanations are limited in scope and at times unpersuasive. Like other contemporary commentary on agency law, the Third Restatement draws from contract and tort theory, an approach which ignores the unique features of agency law. Agency law enables principals to act through agents; it also ensures that principals using agents do not thereby escape liability or other consequences of their choices. This paper develops a theory to fit agency law. The "costbenefit internalization theory" is based on the simple premise that the principal, who has chosen to conduct her business through an agent, must bear the foreseeable consequences of that choice. Conversely, as the bearer of the risks, the principal is entitled to receive the benefits created by the agency relationship. The cost-benefit internalization theory explains and illuminates virtually all agency law doctrine.

scholarly journals Behnke_Armbruster_Strobel - The needs of the many - Influence of personality on third-party judgments of utilitarian rule violations

2020 ◽  
Author(s):  
Alexander Behnke ◽  
Diana Armbruster ◽  
Anja Strobel
Keyword(s):  
Emotional Responses ◽  
Minority Rights ◽  
Third Party ◽  
Online Study ◽  
The Third ◽  
Moral Decisions ◽  
The Many ◽  
Personality Features ◽  
The Cost ◽  
Sense Of Justice

Safeguarding the rights of minorities is crucial for just societies. However, there are conceivable situations were minority rights might seriously impede the rights of the majority. Favoring the minority in such cases constitutes a violation of utilitarian principles. To investigate the emotional, cognitive, and punitive responses of observers of such utilitarian rule transgressions, we conducted an online study with 1004 participants. Two moral scenarios (vaccine policy and epidemic) were rephrased in the third-party perspective. In both scenarios the protagonist opted against the utilitarian option which resulted in more fatalities in total, but avoided harm to a minority. The scenarios varied in whether the minority would have been harmed accidentally or deliberate. The majority of participants chose not to punish the scenarios’ protagonists at all. However, 30.5% judged that protecting the minority over the interests of the majority when only accidental harm would have occurred (vaccine policy) was worthy of punishment. In comparison, only 11.5% opted to punish a protagonist whose decision avoided deliberate harm to a minority at the cost of the majority (epidemic). Emotional responses and appropriateness ratings paralleled these results. Furthermore, complex personality × situation interactions revealed the influence of personality features, i.e., psychopathy, empathy, altruism, authoritarianism, need for cognition and faith in intuition, on participants’ responses. The results further underscore the need to consider the interaction of situational features and inter-individual differences in moral decisions and sense of justice.

scholarly journals Intraspecific Molecular Variation of Allium ursinum (Amaryllidaceae) Across the Border of Two Subspecies Distribution Ranges

2015 ◽  
Vol 57 (1) ◽  
pp. 31-43
Author(s):  
Kaja Rola ◽  
Anna Lenart-Boroń ◽  
Piotr Boroń ◽  
Piotr Osyczka
Keyword(s):  
Genetic Variability ◽  
Hybrid Zone ◽  
Mantel Test ◽  
Genetic Group ◽  
Secondary Contact ◽  
Putative Hybrid ◽  
Morphological Pattern ◽  
The Third ◽  
Allium Ursinum ◽  
Distribution Ranges

Abstract The study investigates the genetic differentiation among two subspecies of Allium ursinum L., namely A. ursinum subsp. ursinum and subsp. ucrainicum as well as their putative hybrid that is represented by individuals with intermediate morphology. Inter-Simple Sequence Repeats (ISSR) were applied to determine the status of intermediate morphotypes in terms of their genetic pattern and to assess the level of genetic variability within and between various populations of A. ursinum. The study comprises 144 specimens from nine populations along the east-west transect in Poland, which includes localities of both subspecies and their putative hybrid. Among the examined populations, 48 bands were amplified, of which 45 were found to be polymorphic. The principal coordinate analysis (PCoA), the neighbour-net analysis and Mantel test showed a strong correlation between genetic variability and geographic distance. Analysis of molecular variance (AMOVA) revealed that a greater proportion of total genetic variation resided within populations rather than among them. The Structure Bayesian clustering analysis revealed the presence of three distinct genetic groups within studied populations, where ‘eastern’ genotypes correspond to A. ursinum subsp. ucrainicum, and ‘western’ to subsp. ursinum; whereas the third genetic group has the largest share in the individuals occurring at the border of the distribution ranges of both subspecies. The emergence of the third genetic group is probably an effect of hybridization events occurring within the secondary contact zone. Typical morphologically intermediate populations occur only in a relatively narrow geographical zone, but the hybrid zone revealed by molecular markers is actually much wider than it is suggested by the morphological pattern of individuals. The current distribution pattern of both subspecies of A. ursinum and their hybrid zone is related to the two main directions of postglacial migration of Fagus sylvatica to the area of Poland. The hybrid zone arose as an effect of the secondary contact of two divergent lineages of A. ursinum.

scholarly journals A Panel Data Study of the Effects of Economic Freedom, Regulatory Quality, and Taxation on the Growth Rate of Per Capita Real GDP

2012 ◽  
Vol 30 (1) ◽  
pp. 103-122
Author(s):  
Richard J. Cebula ◽  
Maggie Foley
Keyword(s):  
Growth Rate ◽  
Fixed Effects ◽  
Economic Freedom ◽  
Government Regulation ◽  
The Third ◽  
Real Gdp ◽  
Regulatory Quality ◽  
Gdp Growth Rate ◽  
Per Capita ◽  
The Cost

Abstract This study empirically investigates three hypotheses. The first is that higher levels of economic freedom in an economy promote a higher growth rate of economic activity and hence yield a higher growth rate of per capita real GDP in that economy. The second hypothesis is that higher quality government regulation leads to a more efficient economic system, in large part by interfering less with market functioning and in part by not adding unnecessarily to the cost of conducting business in the marketplace, and thereby leads to a higher per capita real GDP growth rate. The third hypothesis is that the higher the taxation level/burden relative to GDP in an economy, the lower the growth rate of private sector spending and hence the lower the growth rate of per capita real GDP in that economy. Using a panel dataset for OECD nations over the 2003 through 2006 period, fixed effects PLS estimations find compelling evidence in support of all three of these hypotheses.

Enterprise Inventory Management and Simulation

2014 ◽  
Vol 933 ◽  
pp. 874-878
Author(s):  
Yun Rui Wang
Keyword(s):  
Computer Simulation ◽  
Supply Chain ◽  
Inventory Management ◽  
Simulation Software ◽  
Total Cost ◽  
The Third ◽  
Inventory Strategy ◽  
One Year ◽  
The Cost ◽  
Operation Cost

Inventory is an important link in supply chain, according to characteristics and objectives of inventory control, the reasonable safety inventory, order point, the highest inventory and inventory strategy were determined based on historical sales data. Using Witness simulation software, the optimal strategy was selected from nine inventory strategies by running simulation model for one year. If goods shortage was allowing, the seventh schemes (72000,158100) was better ,the minimum total cost was 888158 yuan ; considering allowing a small amount of shortage, the cost of eighth schemes ( 82000,158100) was least of 1095167; the third scenarios (92000,138100) was selected if without shortage, and the minimum total cost was 1254909 yuan. This shows, the application of computer simulation to assist in the management of inventory is scientific and feasible, it can help enterprises to save the order and operation cost.

Evolution: Medicine’s most basic science

2020 ◽  
pp. 39-42
Author(s):  
Randolph M. Nesse ◽  
Richard Dawkins
Keyword(s):  
Population Genetics ◽  
Natural Selection ◽  
Basic Science ◽  
Evolutionary Biology ◽  
Phylogenetic Trees ◽  
The Body ◽  
Clinical Implications ◽  
Trade Offs ◽  
The Cost

The role of evolutionary biology as a basic science for medicine is expanding rapidly. Some evolutionary methods are already widely applied in medicine, such as population genetics and methods for analysing phylogenetic trees. Newer applications come from seeking evolutionary as well as proximate explanations for disease. Traditional medical research is restricted to proximate studies of the body’s mechanism, but separate evolutionary explanations are needed for why natural selection has left many aspects of the body vulnerable to disease. There are six main possibilities: mismatch, infection, constraints, trade-offs, reproduction at the cost of health, and adaptive defences. Like other basic sciences, evolutionary biology has limited direct clinical implications, but it provides essential research methods, encourages asking new questions that foster a deeper understanding of disease, and provides a framework that organizes the facts of medicine.

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