Parameter Optimization for a Temperature Estimation Model

2003 ◽  
Author(s):  
J. Cole Smith ◽  
Alfonso Ortega ◽  
Colleen M. Gabel ◽  
Dale Henderson
Keyword(s):  
Optimization Problems ◽  
Thermal Response ◽  
Future Research ◽  
Optimization Approach ◽  
Estimation Model ◽  
Temperature Estimation ◽  
Nonconvex Optimization Problems ◽  
The Subject

We consider a problem arising in designing Compact Thermal Models (CTMs) for the purpose of simulating the thermal response of a package. CTMs are often preferred over more detailed models due to their minimal representation and the reduced computations required to obtain accurate nodal temperature predictions under hypothetical scenarios. The quality of CTM performance depends on the determination of an appropriate set of parameters that drive the model. The subject of this paper is a heuristic nonlinear optimization approach to computing the set of CTM parameters that best predicts the thermal response of a package. Our algorithm solves a series of one-dimensional nonconvex optimization problems to obtain these parameters, exploiting the special structure of the CTM in order to improve both the execution time of the algorithm and the quality of the CTM performance. We conclude the paper by providing a brief array of computational results as a proof of concept, along with several possible future research extensions.

A Systematic Review of Replicative Self-Determination Intervention Studies

2019 ◽  
Vol 54 (1) ◽  
pp. 29-39
Author(s):  
John L. Luckner ◽  
Rashida Banerjee ◽  
Sara Movahedazarhouligh ◽  
Kaitlyn Millen
Keyword(s):  
Systematic Review ◽  
Intervention Studies ◽  
Self Determination ◽  
Future Research ◽  
Replication Studies ◽  
Research Designs ◽  
Replication Research ◽  
Quality Of Research

Current federal legislation emphasizes the use of programs, interventions, strategies, and activities that have been demonstrated through research to be effective. One way to increase the quantity and quality of research that guides practice is to conduct replication research. The purpose of this study was to undertake a systematic review of the replication research focused on self-determination conducted between 2007 and 2017. Using methods used by Cook and colleagues, we identified 80 intervention studies on topics related to self-determination, of which 31 were coded as replications. Intervention study trends, rate of replication studies, percentage of agreements between findings of original and replication studies, amount of author overlap, and types of research designs used are reported along with recommendations for future research.

Communication in social networks of St. Petersburg as a means of adaptation of ethnocultural communities

Litera ◽  
2021 ◽  
pp. 38-55
Author(s):  
Rivaa Mukhammad Salem Alsalibi
Keyword(s):  
Social Networks ◽  
Social Media ◽  
Ethnic Communities ◽  
Sense Of Security ◽  
The Social ◽  
The Subject ◽  
Development Prospects

The subject of this research is the specifics, forms and functions of interaction in social media groups between the representatives of ethnic communities. The goal consists in determination of the role of social networks in adaptation of ethnocultural communities of St. Petersburg. The research is based on the polling technique for acquisition of information on the cognitive, emotional, and behavioral state of a person. The survey was conducted via distribution of questionnaires among the representatives of ethnic groups. The article also employs the method of systematic scientific observation over the social media groups, topic raised therein, as well as reading and analysis of the comments. The scientific novelty of this work consists in outlining of the nature, trends and development prospects of cross-cultural communications as the channel for ethnocultural interaction.  The main conclusions, which touch upon users from various ethnic communities who do not have enough experience in organization of activity of social media groups, demonstrate that it causes the loss of the sense of security, accumulation of prejudices and escalation of interethnic conflicts, as well as preference of the with restricted access, which contributes to lock down of the group and impedes adaptation in the accepting society. Stabilization of situation can be achieved by improvement of the quality of content posted in the social media, as well as level of their administration.

scholarly journals pH of exudate test in the physiological quality of crambe seeds

2016 ◽  
Vol 46 (6) ◽  
pp. 1014-1018 ◽  
Author(s):  
Charline Zaratin Alves ◽  
Lennis Afraire Rodrigues ◽  
Carlos Henrique Queiroz Rego ◽  
Josué Bispo da Silva
Keyword(s):  
Pearson Correlation ◽  
Raw Material ◽  
Mean Values ◽  
Tukey Test ◽  
Physiological Quality ◽  
The Subject ◽  
The Mean ◽  
C 30

ABSTRACT: Crambe is a rapeseed with high oil content and can be used as a winter cover or as a source of raw material for the production of biodiesel, however espite the growing interest in the culture, research on the subject is still incipient, especially concerning the seed production and analysis technology. The purpose of this study is to evaluate the physiological quality of crambe seeds, 'FMS Brilhante' cultivar, by testing the pH of exudate. Five seed lots were submitted to the determination of water content and the tests of germination and vigor (first count, emergence and tetrazolium). In the conduction of pH exudate test, temperatures (25 and 30oC), and periods of seed imbibition in water (15, 30 and 45 minutes) were tested. The experiment was conducted in a completely randomized manner, with four replicates, and the mean values were compared by the Tukey test at 5% probability; Pearson correlation between the pH of the exudate and initial tests was also made. Testing the pH of exudate is promising for separating lots of crambe seeds and the following combinations of 25°C/30 minutes or 30°C/45 minutes can be used.

A Linear Optimization Approach for Increasing Sustainability in Vegetable Crop Production

2011 ◽  
pp. 234-265 ◽  
Author(s):  
Lana dos Santos ◽  
Marcos Arenales ◽  
Alysson Costa ◽  
Ricardo Santos
Keyword(s):  
Crop Rotation ◽  
Crop Production ◽  
Optimization Problems ◽  
Linear Optimization ◽  
Future Research ◽  
Optimization Approach ◽  
Vegetable Crops ◽  
Vegetable Crop ◽  
Modeling Framework ◽  
Ecological Criteria

This chapter is concerned with a set of optimization problems associated to crop rotation scheduling in the context of vegetable crop production according to some ecological criteria: no crop of the same botanic family is planted in sequence, green manure and fallow periods must be present in any schedule. A core mathematical model called the crop rotation scheduling model is proposed to represent these ecological criteria together with specific technical constraints associated to the growing of vegetable crops. Three optimization problems based on crop rotation schedules are written in detail in this chapter. For each problem, the authors present a general modeling framework and a solution methodology based on a technique known as column generation, which iteratively builds crop rotation plans for a number of plots. Some extensions are also presented, with the aim of incorporating additional characteristics found in production field conditions. This chapter ends with a brief discussion on a set of computational experiments and some suggestions for future research.

scholarly journals Development of Shallow-Depth Soil Temperature Estimation Model Based on Thermal Response in Permafrost Area

2018 ◽  
Vol 8 (10) ◽  
pp. 1886 ◽  
Author(s):  
Keunbo Park ◽  
Heekwon Yang ◽  
Bang Lee ◽  
Dongwook Kim
Keyword(s):  
Soil Temperature ◽  
Temperature Measurement ◽  
Thermal Response ◽  
Estimation Model ◽  
Temperature Estimation ◽  
Soil Temperatures ◽  
Different Depths ◽  
The Relationship ◽  
Temperature Depth ◽  
Good Agreement

A soil temperature estimation model for increasing depth in a permafrost area in Alaska near the Bering Sea is proposed based on a thermal response concept. Thermal response is a measure of the internal physical heat transfer of soil due to transferred heat into the soil. Soil temperature data at different depths from late spring to the early autumn period at multiple permafrost sites were collected using automatic sensor measurements. From the analysis results, a model was established based on the relationship between the normalized cumulative soil temperatures (CRCST*i,m and CST*ud,m) of two different depths. CST*ud,m is the parameter of the soil temperature measurement at a depth of 5 cm, and CRCST*i,m is the parameter of the soil temperature measured at deeper depths of i cm (i = 10, 15, 20, and 30). Additionally, the fitting parameters of the mathematical models of the CRCST*i,m–CST*ud,m relationship were determined. The measured soil temperature depth profiles at a different site were compared with their predicted soil temperatures using the developed model for the model validation purpose. Consequently, the predicted soil temperatures at different soil depths using the soil temperature measurement of the uppermost depth (5 cm) were in good agreement with the measured results.

scholarly journals Development of a Shallow-Depth Soil Temperature Estimation Model Based on Air Temperatures and Soil Water Contents in a Permafrost Area

2020 ◽  
Vol 10 (3) ◽  
pp. 1058
Author(s):  
Keunbo Park ◽  
Yongwon Kim ◽  
Kichoel Lee ◽  
Dongwook Kim
Keyword(s):  
Soil Temperature ◽  
Soil Water ◽  
Air Temperature ◽  
Thermal Response ◽  
Shallow Depth ◽  
Estimation Model ◽  
Temperature Estimation ◽  
Layer Development ◽  
Water Contents ◽  
Soil Water Contents

A model for predicting shallow depth soil temperatures is important and effective to assess the changes in soil conditions related to global climate change and local disturbances. Shallow-depth soil temperature estimation model in cold region in Alaska is developed based on thermal response using air temperature and shallow-depth soil water content during active layer development period of 160 days from May to October. Among the seven soil temperature measurement sites, data from four sites were used for model development, and the remaining three sites were used for model validation. Near the middle of the seven measurement sites, air temperature is monitored at one location. The proposed model implemented concepts of thermal response and cumulative temperature. Temperatures and soil water contents were measured using automated remote sensing technology. Consequently, it was confirmed that the developed model enables fast and accurate assessment of shallow-depth soil temperature during active soil layer development period.

scholarly journals Indicators characterizing the quality of state (municipal) services in the sphere of youth policy

2021 ◽  
pp. 1-14
Author(s):  
Kristina Fedoseeva
Keyword(s):  
The State ◽  
Quality Of Services ◽  
Municipal Services ◽  
Appropriate Use ◽  
Youth Policy ◽  
Legislative Regulation ◽  
The Subject ◽  
Quantitative Indicators

The subject of this research is indicators that characterize the quality of municipal services rendered in accordance with the state (municipal) task in the sphere of youth policy. Special attention given to the analysis of state tasks approved on the federal and regional levels for budgetary (autonomous) institutions. The author examines the indicators that characterize the quality of municipal services in the sphere of youth policy as the foundation for assessing the achievement of publicly significant results in the context of the vector for improving the efficiency of spending budgetary funds. The article explores the problem of the absence of correlation between the quality of services rendered and the size of subsidy allocated for the implementation of state (municipal) task. The main conclusion consists in the statement that at the present day it is difficult to assess the achievement of publicly significant result in rendering state (municipal) services in the sphere of youth policy as a criterion for the appropriate use of subsidies for the fulfillment of the state (municipal) tasks within the framework of the activity of budgetary (autonomous) institutions. This is substantiated by the formal determination of indicators set by such institutions, which characterize the quality of the rendered municipal services and the absence of comprehensive legislative regulation in this sphere. The efficiency parameters of the conducted state youth policy are for the most part reflected through the quantitative indicators.

scholarly journals Pengaruh penerapan softskill mahasiswa melalui OKK dengan tatakrama kehidupan di kampus (saat perkuliahan)

2015 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Bambang Hariadi
Keyword(s):  
Cultural Values ◽  
Sampling Technique ◽  
Future Research ◽  
Soft Skill ◽  
Purposive Sampling ◽  
College Life ◽  
New Findings ◽  
Significant Difference ◽  
The Subject

Penelitian ini bertujuan untuk menguji pengaruh OKK terhadap tatakrama kehidupan di kampus. Target khusus yang ingin dicapai adalah temuan baru tentang faktor-faktor penerap-an OKK yang berpengaruh secara langsung terhadap tatakrama mahasiswa dalam perkuliahan. Metode yang diterapkan adalah menggunakan rancangan survey. Subjek penelitian ini adalah mahasiswa dan dosen yang mengajar mahasiswa angkatan 2013. Penentuan subjek penelitian dengan teknik purposive sampling. Instrumen yang digunakan adalah angket. Agar memenuhi validitas (curricular validity), angket yang disusun mengacu pada nilai-nilai saat OKK dan nilai budaya STIKOM. Temuan penelitian menunjukkan bahwa (1) tidak ada perbedaan yang signi-fikan penerapan OKK yang telah dilakukan terhadap perilaku mahasiswa saat perkuliahan, (2) OKK tidak berpengaruh pada peningkatan tatakrama kehidupan mahasiswa saat perkuliahan, dan (3) faktor kegiatan OKK yang banyak memberikan pengaruh terhadap tatakarma kehidup-an mahasiswa saat perkuliahan adalah penerapan budaya Stikom. Saran untuk pelaksanaan penelitian yang akan datang sebaiknya (1) penentuan sampel antar kelompok sama atau men-dekati sama, (2) dilakukan pengukuran awal untuk mengetahui perbedaan sebelum dilakukan OKK dengan setelah dilakukan OKK, dan (3) penentuan sampel (subjek penelitian) sebaiknya tidak digunakan silih berganti artinya kalau suatu subjek sudah masuk sampel kelompok A maka tidak dijadikan sampel untuk kelompok B.Kata kunci: Soft skill, kehidupan kampus, tata krama kehidupan kampus.The Effect of Students’ Softskill Implementation Through OKK Towards College Life Etiquette (During Lecturing)AbstractThis study aimed to examine the effect of the OKK manners of life on campus. Specific targets to be achieved is the new findings about factors that affect the implementation OKK directly to the manners of students in lectures. The method adopted is using the survey design. The subjects were students and lecturers who teach students of 2013. Determining the subject of research by purposive sampling technique. The instrument used are questionnaires. In order to meet the validity (curricular validity), a questionnaire compiled refer to the current values and cultural values Stikom OKK. Research findings point that (1) there was no significant difference OKK the implementation that has been made to the behavior of students during lectures, (2) OKK had no effect on improving the manners of life of students during lectures, and (3) factors that many activities OKK manners influence on the lives of students during lectures is the implementation Stikom culture. Suggestions for implementation of future research should (1) determination of the sample between groups must be equal or close to equal, (2) The initial measurements were taken to determine the differences before OKK with after OKK, and (3) determination of the sample (the subject of research) should not be used interchangeably means that if a subject had entered the sample group A then not sampled for group B.Keywords: Soft skill, college life, manners of college life.

scholarly journals 697 The Use of Augmented and Mixed Reality Technology to Improve Surgical Outcomes: A Systematic Review

2021 ◽  
Vol 108 (Supplement_6) ◽  
Author(s):  
E Bollen ◽  
J Solomon ◽  
M Stubbs ◽  
B Langridge ◽  
P E M Butler
Keyword(s):  
Systematic Review ◽  
Surgical Outcomes ◽  
Mixed Reality ◽  
Hospital Admissions ◽  
Primary Data ◽  
Future Research ◽  
Surgical Workflow ◽  
Augmented Reality Technology ◽  
The Subject

Abstract Aim The use of augmented and mixed reality technology is a novel and rapidly developing field. This technology has generated significant interest in surgery, however the evidence supporting its proposed benefits is limited. This systematic review aims to critically appraise the intraoperative use of augmented and mixed reality technology to improve surgical outcomes in order to provide directions for future research. Method This systematic review is registered with PROSPERO (CRD42020205892) and was performed in adherence to PRISMA guidelines. Studies reporting primary data on surgical outcomes of the intraoperative use of augmented and mixed reality technology were included. A structured search of major literature databases was performed. Risk of bias was assessed following the guidance of the Cochrane Handbook. Results 68 studies met the inclusion criteria, with 63 reporting the intraoperative use of augmented reality technology and 5 reporting the use of mixed reality. The number and methodological quality of these studies is increasing. The intraoperative use of this technology has been demonstrated to reduce operative times, intraoperative blood loss and lengths of hospital admissions in specific settings. The widespread adoption of this technology faces the challenges of its cost, technical precision and integration into the surgical workflow. Conclusions The intraoperative use of augmented and mixed reality technology is an area of research still in its early stages, with an increasing number of methodologically robust studies on the subject. Current results suggest that the use of this technology is safe and, in certain applications, has the potential to significantly improve surgical and health-economic outcomes.

scholarly journals Quarantine as a tool of epidemic fight

2020 ◽  
pp. 180-195
Author(s):  
Renata E. Paliga
Keyword(s):  
19Th Century ◽  
Middle Ages ◽  
World Literature ◽  
Epidemiological Tool ◽  
History Of ◽  
The Subject ◽  
Economic Balance ◽  
The 19Th Century

Until the 19th century, the factor causing epidemics was not known, and the escape from a place where it occurred as well as isolation of patients was considered to be the only effective way to avoid illness and death. Quarantine in a sense similar to modern times was used in 1377 in Ragusa, today’s Dubrovnik, during the plague epidemic. It was the first administratively imposed procedure in the world’s history. It was later used in Venice and other rich port cities in the Mediterranean. On the territory of today’s Poland, quarantine measures were used by the so-called Mayor of the Air – LukaszDrewno in 1623 during the plague epidemic in Warsaw. The quarantine left its mark on all areas of human activity. It affected all humanity in a way that is underestimated today. Throughout history, it has been described and presented visually. It is omnipresent in the world literature, art and philosophy. However, the isolation and closure of cities, limiting trade, had an impact on the economic balance, and the dilemma between the choice of inhabitants’ health and the quality of existence, i.e. their wealth, has been the subject of discussions since the Middle Ages. Since the end of the 19th century, quarantine has lost its practical meaning. The discovery of bacteria and a huge development of medical and social sciences allowed limiting its range. In the 20th century isolation and quarantine no longer had a global range, because the ability to identify factors causing the epidemic, knowledge about the incubation period, carrier, infectiousness, enabled the rational determination of its duration and territorial range. The modern SARS COV 2 pandemic has resulted in a global quarantine on a scale unprecedented for at least three hundred years. The aim of this paper is to present the history of quarantine from its beginning to the present day, including its usefulness as an epidemiological tool.

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