NASH EQUILIBRIUM IN TWO-SIDED MATE CHOICE PROBLEM

2008 ◽  
Vol 10 (04) ◽  
pp. 421-435 ◽  
Author(s):  
VLADIMIR MAZALOV ◽  
ANNA FALKO
Keyword(s):  
Nash Equilibrium ◽  
Search Model ◽  
Individual Choice ◽  
Choice Problem ◽  
Expected Payoff ◽  
Last Stage ◽  
Nash Equilibrium Strategies ◽  
The Individual

We consider a two-sided search model in which individuals from two distinct populations would like to form a long-term relationship with a member of the other population. The individual choice is determined by the quality of the partner. Initially the quality of individuals in the population is uniform. At every stage the individuals randomly matched from their populations recognize the quality of the partner. If they accept each other they create a couple and leave the game. The partner's quality is the payoff. Unmatched players go to the next stage. At the last stage the individuals accept any partner. Each player aims to maximize her/his expected payoff. In this paper explicit formulas for Nash equilibrium strategies are derived. Also, the model with incoming individuals is analyzed.

scholarly journals Nash versus coarse correlation

2020 ◽  
Vol 23 (4) ◽  
pp. 1178-1204 ◽  
Author(s):  
Konstantinos Georgalos ◽  
Indrajit Ray ◽  
Sonali SenGupta
Keyword(s):  
Nash Equilibrium ◽  
Correlated Equilibrium ◽  
Individual Choice ◽  
Pure Nash Equilibrium ◽  
Expected Payoff ◽  
Equilibrium Payoff ◽  
Payoff Dominance ◽  
Dominated Strategies ◽  
Person Game ◽  
Nash Point

Abstract We run a laboratory experiment to test the concept of coarse correlated equilibrium (Moulin and Vial in Int J Game Theory 7:201–221, 1978), with a two-person game with unique pure Nash equilibrium which is also the solution of iterative elimination of strictly dominated strategies. The subjects are asked to commit to a device that randomly picks one of three symmetric outcomes (including the Nash point) with higher ex-ante expected payoff than the Nash equilibrium payoff. We find that the subjects do not accept this lottery (which is a coarse correlated equilibrium); instead, they choose to play the game and coordinate on the Nash equilibrium. However, given an individual choice between a lottery with equal probabilities of the same outcomes and the sure payoff as in the Nash point, the lottery is chosen by the subjects. This result is robust against a few variations. We explain our result as selecting risk-dominance over payoff dominance in equilibrium.

Optimising Epilepsy Therapy – Searching for the Evidence – Looking Beyond the Data

2015 ◽  
Vol 10 (2) ◽  
pp. 164
Author(s):  
Mar Carreño ◽  
Eugen Trinka ◽  
Martin Holtkamp ◽  
◽  
◽  
...  
Keyword(s):  
Refractory Epilepsy ◽  
Study Data ◽  
Type D ◽  
Epilepsy Therapy ◽  
Suitable Treatment ◽  
Type C ◽  
The Individual ◽  
The Devil

There is now an extensive range of anti-epileptic drugs (AEDs) available including older established treatments and a newer generation of medications. The choice of drugs and what constitutes optimal therapy, however, is unclear due to limitations in the data supporting their use, particularly among the newer treatments. In clinical trials of monotherapy, a treatment is required to show only non-inferiority to another benchmark treatment. In trials of polytherapy, comparisons are limited to placebo. It is therefore necessary to look beyond the study data and consider other parameters to ascertain the most suitable treatment for the individual patient. Available evidence suggests that efficacy is similar among most AEDs, but this does not mean they are all the same. Some show efficacy in early and refractory epilepsy and some improve depression and quality of life (QOL) in epilepsy. AEDs are associated with a range of adverse events (AEs) that can limit their usefulness. AE classifications include type A (augmented and dose related) including tiredness, fatigue, insomnia, dizziness, vertigo, imbalance, ataxia, tremor and cognitive impairment; type B (bizarre and idiosyncratic) including various hypersensitivity reactions; type C (chronic long-term toxicity) including hirsutism, alopecia, weight gain and obesity; and type D (teratogenesis and carcinogenesis). The newer AEDs have been more thoroughly assessed for AEs than older drugs and risks are better understood. In AED safety, it is not better to follow a policy of ‘better the devil you know’ but rather to carefully monitor AE incidence and be prepared to switch drugs to improve tolerability and avoid non-compliance and treatment failure.

scholarly journals An improved NO<sub>2</sub> retrieval for the GOME-2 satellite instrument

2011 ◽  
Vol 4 (6) ◽  
pp. 1147-1159 ◽  
Author(s):  
A. Richter ◽  
M. Begoin ◽  
A. Hilboll ◽  
J. P. Burrows
Keyword(s):  
Signal To Noise Ratio ◽  
Bare Soil ◽  
Satellite Observations ◽  
Spectral Signature ◽  
Data Set ◽  
Good Consistency ◽  
The Individual ◽  
High Pass

Abstract. Satellite observations of nitrogen dioxide (NO2) provide valuable information on both stratospheric and tropospheric composition. Nadir measurements from GOME, SCIAMACHY, OMI, and GOME-2 have been used in many studies on tropospheric NO2 burdens, the importance of different NOx emissions sources and their change over time. The observations made by the three GOME-2 instruments will extend the existing data set by more than a decade, and a high quality of the data as well as their good consistency with existing time series is of particular importance. In this paper, an improved GOME-2 NO2 retrieval is described which reduces the scatter of the individual NO2 columns globally but in particular in the region of the Southern Atlantic Anomaly. This is achieved by using a larger fitting window including more spectral points, and by applying a two step spike removal algorithm in the fit. The new GOME-2 data set is shown to have good consistency with SCIAMACHY NO2 columns. Remaining small differences are shown to be linked to changes in the daily solar irradiance measurements used in both GOME-2 and SCIAMACHY retrievals. In the large retrieval window, a not previously identified spectral signature was found which is linked to deserts and other regions with bare soil. Inclusion of this empirically derived pseudo cross-section significantly improves the retrievals and potentially provides information on surface properties and desert aerosols. Using the new GOME-2 NO2 data set, a long-term average of tropospheric columns was computed and high-pass filtered. The resulting map shows evidence for pollution from several additional shipping lanes, not previously identified in satellite observations. This illustrates the excellent signal to noise ratio achievable with the improved GOME-2 retrievals.

scholarly journals Near-Nash equilibrium strategies for LQ differential games with inaccurate state information

2006 ◽  
Vol 2006 ◽  
pp. 1-24 ◽  
Author(s):  
Manuel Jimenez-Lizarraga ◽  
Alex Poznyak
Keyword(s):  
Nash Equilibrium ◽  
Control Strategies ◽  
Perfect State ◽  
Linear Quadratic ◽  
State Information ◽  
Standard Solution ◽  
Nash Equilibrium Strategies ◽  
Zero Sum ◽  
Cost Game

ε-Nash equilibrium or “near equilibrium” for a linear quadratic cost game is considered. Due to inaccurate state information, the standard solution for feedback Nash equilibrium cannot be applied. Instead, an estimation of the players' states is substituted into the optimal control strategies equation obtained for perfect state information. The magnitude of theεin theε-Nash equilibrium will depend on the quality of the estimation process. To illustrate this approach, a Luenberger-type observer is used in the numerical example to generate the players' state estimates in a two-player non-zero-sum LQ differential game.

scholarly journals Experience with various occluder types for endovascular hemodynamic isolation of the left atrium appendage in patients with non-valvular atrial fibrillation

2021 ◽  
Vol 28 (3) ◽  
pp. 45-54
Author(s):  
D. V. Pevzner ◽  
E. V. Merkulov ◽  
G. K. Arutyunyan ◽  
A. L. Komarov ◽  
O. O. Shakhmatova ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Left Atrium ◽  
Individual Choice ◽  
Device Implantation ◽  
Comparison Groups ◽  
Anatomic Variants ◽  
Short And Long Term ◽  
The Individual

The aim of our study was to evaluate implantation efficacy and safety across various occluder types and to identify factors determining device selection.Methods. This single-site prospective observational study included patients above the age of 40 years with non-valvular atrial fibrillation (AF) and high thromboembolic risk, undergoing endovascular isolation of the left atrium appendage (LAA) with Watchman or Amplatzer Cardiac Plug/Amulet devices. Occluders were implanted to patients without either had contraindications to anticoagulant therapy (ACT) or refused ACT. We evaluated technical aspects of device implantation, short- and long-term outcomes of the intervention over 3 years of follow-up.Results. 90 patients were enrolled in the study (62 into the Watchman arm and 28 into the Amplatzer arm). Interventions were technically successful in 89 cases. In 1 patient (1/90, 1.1%) technical success was not achieved due to device migration (Amplatzer Amulet). The incidence of early (occurring within˂ 24 hours) implantation complications was 0% in the Watchman arm, and 3.6% in the Amplatzer arm (1/28) (р=0.135) (device migration). The cumulative incidence of all in-hospital complications was 11.3% and 14.3%, respectively (р=0.734). No significant differences between arms were found in the incidence of device thrombosis within 90 days post-implantation (3.3% in the Watchman’s arm and 8.3% in the Amplatzer arm, р=0.316). During the observation period, there were no significant differences in comparison groups in the incidence of net clinical efficacy endpoint events (р=0.58). The bleeding rate was 17.7% and 14.3%, respectively, р=0.769. No factors influencing the choice of the device could be identified reliably; however, there was a trend towards Watchman preference for appendage anatomic variants such as broccoli and cactus. Amplatzer was preferred in patients with contraindications to ACT.Conclusion. Implantation of Watchman and Amplatzer Amulet occluders is equally effective and safe in preventing thromboembolism in patients with AF not receiving ACT for various reasons. The individual choice of a device may be influenced by appendage anatomy and indications to occluder implantation.

scholarly journals Personalization of the use of non-steroidal anti-inflammatory drugs for musculoskeletal diseases. Resolution on the results of the Meeting of Experts of December 13, 2017

2018 ◽  
pp. 76-84 ◽  
Author(s):  
A. E. Karateev ◽  
A. M. Lila ◽  
I. S. Dydykina ◽  
P. R. Kamchatnov ◽  
S. O. Mazurenko ◽  
...  
Keyword(s):  
Musculoskeletal Diseases ◽  
Modern Medicine ◽  
Individual Characteristics ◽  
Analgesic Therapy ◽  
Acute Pain Therapy ◽  
Inflammatory Drugs ◽  
The Individual ◽  
Key Aspects

The personalization of therapy is one of the innovative approaches gaining an increasingly strong foothold in modern medicine, implying an individual approach to each patient, taking into account the individual characteristics of the patient and the specific clinical case. This same standpoint of personified therapy should be used to plan rational analgesic therapy, the most important component of managing patients with the most common and socially significant diseases, with conditions that have a significant impact on the patient’s quality of life and worsen the course of concomitant diseases. The Meeting of Experts of different specialties such as rheumatologists, neurologists, cardiologists and clinical pharmacologists considered the key aspects of the prescription of NSAIDs, the most widely used class of painkillers, including those used for the relief of musculoskeletal pain. It was noted that when choosing NSAIDs, the practitioner should take into account the diagnosis, the planned duration of  analgesic therapy, the intensity of pain, medical history data, the presence of comorbid diseases and risk factors for drug complications. There are different types of NSAIDs, some of which are most useful for urgent acute pain therapy (eg, ketoprofen), while others are most suitable for long-term pain management in chronic diseases (eg, etoricoxib). In any case, the practitioner should take into account the priority of patient safety and pay the utmost attention to the prevention of NSAIDassociated complications, and also keep in mind the duration of the specific drug administration permitted by the patient information leaflet. It was also noted that the launch of a new generic etoricoxib (Kostarox®) expands the possibilities of analgesic therapy for the Russian practitioners.

scholarly journals Sunspot area catalog revisited: Daily cross-calibrated areas since 1874

2020 ◽  
Vol 640 ◽  
pp. A78 ◽  
Author(s):  
Sudip Mandal ◽  
Natalie A. Krivova ◽  
Sami K. Solanki ◽  
Nimesh Sinha ◽  
Dipankar Banerjee
Keyword(s):  
Sunspot Area ◽  
The Other ◽  
Royal Greenwich Observatory ◽  
Individual Group ◽  
Cross Calibration ◽  
The Individual ◽  
Temporal Coverage ◽  
Final Composite

Context. Long and consistent sunspot area records are important for understanding long-term solar activity and variability. Multiple observatories around the globe have regularly recorded sunspot areas, but such individual records only cover restricted periods of time. Furthermore, there are systematic differences between these records and require cross-calibration before they can reliably be used for further studies. Aims. We produce a cross-calibrated and homogeneous record of total daily sunspot areas, both projected and corrected, covering the period between 1874 and 2019. In addition, we generated a catalog of calibrated individual group areas for the same period. Methods. We compared the data from nine archives: Royal Greenwich Observatory (RGO), Kislovodsk, Pulkovo, Debrecen, Kodaikanal, Solar Optical Observing Network (SOON), Rome, Catania, and Yunnan Observatories, covering the period between 1874 and 2019. Cross-comparisons of the individual records were done to produce homogeneous and inter-calibrated records of daily projected and corrected areas. As in earlier studies, the basis of the composite is formed by the data from RGO. After 1976, the only datasets used are those from Kislovodsk, Pulkovo, and Debrecen observatories. This choice was made based on the temporal coverage and the quality of the data. While there are still 776 days missing in the final composite, these remaining gaps could not be filled with data from the other archives as the missing days lie either before 1922 or after 2016 and none of the additional archives cover these periods. Results. In contrast to the SOON data used in previous area composites for the post-RGO period, the properties of the data from Kislovodsk and Pulkovo are very similar to those from the RGO series. They also directly overlap the RGO data in time, which makes their cross-calibration with RGO much more reliable. Indeed, comparing our area catalog with previous such composites, we find improvements both in data quality and coverage. We also computed the daily Photometric Sunspot Index, which is widely used, for example, in empirical reconstructions of solar irradiance.

Positive Technology

2016 ◽  
pp. 1-37 ◽  
Author(s):  
Giuseppe Riva ◽  
Daniela Villani ◽  
Pietro Cipresso ◽  
Andrea Gaggioli
Keyword(s):  
Quality Of Experience ◽  
Behavioral Flexibility ◽  
The Other ◽  
Personal Goals ◽  
Use Of Technology ◽  
Applied Approach ◽  
The Individual ◽  
Flow Experiences

This chapter describes and discusses the “Positive Technology” approach: the scientific and applied approach for the use of technology in improving the quality of our personal experience through its structuring, augmentation and/or replacement - as a way for improving and sustaining personal change. On one side, we suggest that our cognitive system is naturally shaped to identify and counter the experiential conflicts that are usually the main motives for change. Optimal experiences, also defined as “flow experiences”, instead allow the individual to consider long-term personal goals differently and start to experiment with changing them. In other words optimal experiences, when meaningful for the individual, widen the array of thoughts and actions, facilitating generativity and behavioral flexibility. On the other side we claim that it is possible to use technology to manipulate the quality of experience, with the goal of increasing wellness, and generating strengths and resilience in individuals, organizations and society.

scholarly journals “No evident disease activity”: The use of combined assessments in the management of patients with multiple sclerosis

2017 ◽  
Vol 23 (9) ◽  
pp. 1179-1187 ◽  
Author(s):  
Gavin Giovannoni ◽  
Davorka Tomic ◽  
Jeremy R Bright ◽  
Eva Havrdová
Keyword(s):  
Multiple Sclerosis ◽  
Disease Activity ◽  
Brain Magnetic Resonance Imaging ◽  
Individual Patient Level ◽  
Patient Reported ◽  
Magnetic Resonance Imaging Mri ◽  
The Individual ◽  
The Brain

Using combined endpoints to define no evident disease activity (NEDA) is becoming increasingly common when setting targets for treatment outcomes in multiple sclerosis (MS). Historically, NEDA has taken account of the occurrence of relapses, brain magnetic resonance imaging (MRI) lesions and disability worsening, but this approach places emphasis on inflammatory activity in the brain and mostly overlooks ongoing neurodegenerative damage. Combined assessments of NEDA which take account of changes in brain volume or neuropsychological outcomes such as cognitive function may begin to address this imbalance, and such assessments may also consider blood or spinal-fluid neurofilament levels or patient-reported outcomes and quality of life measures. If a combined NEDA assessment can be validated in prospective studies as indicative of long-term disease remission at the individual patient level, treating to achieve NEDA could become the goal of clinical practice and achieving NEDA may become the “new normal” state of disease control for patients with MS.

scholarly journals The Relationship between Hospital Occupational Stress and Prevalence of Depression in Nurses Working in Ilam Hospitals

2019 ◽  
pp. 1-8
Author(s):  
Alireza Roughani ◽  
Mehdi Fallah Bagher Shaidaei ◽  
Akram Rohani ◽  
Ali Delpishe ◽  
Zahra Sharifi ◽  
...  
Keyword(s):  
Occupational Stress ◽  
Mental Illnesses ◽  
Willingness To Participate ◽  
Statistical Population ◽  
Prevalence Of Depression ◽  
The Individual ◽  
Anxiety Depression ◽  
The Relationship

Introduction: Long-term stress can also lead to mental disorders such as anxiety, depression and physical burnout. The aim of this study was to determine the relationship between hospital occupational stress and prevalence of depression among nurses working in Ilam hospitals. Methods: This is a descriptive-analytic study. The statistical population includes the staff of Imam Khomeini Hospital and martyr Mostafa Khomeini Hospital in Ilam. The study was conducted using a census method. The criteria for entering the individuals were their willingness to participate in this study. The subjects were included in the study with complete satisfaction. Demographic questionnaires, standard questionnaires for occupational stress (HSI), and Beck Depression Inventory were used. Questionnaires were distributed to pre-trained individuals. The data was extracted and analyzed by SPSS software. Results: The findings of this study showed that 31.8% of the samples had a degree of depression. In this study, the rate of depression in men is higher than that of women. According to the results, occupational stress and environmental stress in nursing women were more than men. There is a significant relationship between job stress and stress associated with life with depression (p = 0.001, p = 0.004, respectively). Conclusion: The results of this study always emphasize the point that attention should be paid to stress and stressful occupation of nursing and to think about it and to take preventive measures. Because of the stress of the valve towards all mental illnesses In the event of manpower and the work of a community, it can cause many problems and costs for the individual and society and reduce the quality of the services provided by the nurses.

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