Testing Programs Research Articles

HIV-Related Stigma Moderates the Relation Between Perceived Susceptibility and HIV Testing Intention Among Heterosexual (but Not Sexual Minority) College Students.

HIV-related stigma remains a considerable barrier to engaging at-risk populations in HIV testing and prevention programs. We assessed the moderating role of HIV-related stigma on the relation between perceived susceptibility to HIV and HIV testing intention among college students. We hypothesized that the moderating role of HIV-related stigma would be differential between heterosexual and sexual minority college students. We administered a survey focused on HIV-related knowledge, attitudes, and behaviors in spring 2016 (N = 2,159). We used multigroup path analysis to analyze the hypothesized moderation. HIV-related stigma moderated the relation between perceived susceptibility and testing intention for heterosexual but not sexual minority college students. Specifically, higher HIV-related stigma decreased the association between perceived susceptibility and testing intention. These results demonstrate the importance of priority population segmentation for HIV testing campaigns.

Standartization of Forensic Activities and Certification of Expert Laboratories as a Factor for the Development of Forensic Examination

The author has carried out the analysis of the perspectives for certification of domestic forensic laboratories for the compliance with international standards, which would contribute to the creation of an effective legal mechanism for the transition to a new level of development of forensic technologies. The main factors of administrative and legal regulation in the field of standardization have been studied. In accordance with the requirements of DSTU ISO / IEC 17025 the principles of organization and implementation of the quality management system (QMS) into forensic laboratories have been determined.
 It has been established that the execution of the DSTU ISO / IEC 17025 requirements needs significant resources and financial costs from the laboratory. The author has provided clarification to the main stages of preparation for certification, which include measures on developing management documentation (Guidelines, Regulations on forensic laboratory, Accreditation Area), on inventory of existing equipment, metrological support of laboratory activities, preparation and submission of applications to the accreditation agency. It has been noted that certified forensic laboratories should use certified expert methods within their activities that can ensure reliable results during the research. Methodologies should be tested in other reputable organizations or validated directly in the laboratory. Considerable attention has been paid to the quality of standard samples, reagents and materials. The emphasis has been placed on the need to participate in proficiency testing programs based on the results of interlaboratory comparative tests as an effective way to monitor the activities of the forensic laboratory.
 The author has substantiated the conclusion that the standardization processes of forensic activity and certification of forensic laboratories are aimed at increasing the level of metrological work to protect citizens and the national economy of Ukraine from the consequences of unreliable measurement results.

Ecological and evolutionary approaches to improving crop variety mixtures.

Variety mixtures can provide a range of benefits for both the crop and the environment. Their utility for the suppression of pathogens, especially in small grain crops, is well established and has seen some remarkable successes. However, despite decades of academic interest in the topic, commercial efforts to develop, release and promote variety mixtures remain peripheral to normal breeding activities. Here we argue that this is because simple but general design principles that allow for the optimization of multiple mixture benefits are currently lacking. We therefore review the practical and conceptual challenges inherent in the development of variety mixtures, and discuss common approaches to overcome these. We further consider three domains in which they might be particularly beneficial: pathogen resistance, yield stability and yield enhancement. We demonstrate that combining evolutionary and ecological concepts with data typically available from breeding and variety testing programmes could make mixture development easier and more economic. Identifying synergies between the breeding for monocultures and mixtures may even be key to the widespread adoption of mixtures-to the profit of breeders, farmers and society as a whole.

An Application of Cognitive Diagnostic Modeling to a Listening Comprehension Test

인지진단모형은 학생 개개인의 지식에 대한 숙달 여부를 판정하여 교수·학습 과정의 다양한 의사 결정에 유용한 정보를 제공할 수 있다. 최근 인지진단모형은 다양한 모형의 개발, 효율적인 엘고리듬을 통한 모형의 일관성 있는 추정과 비교, Q-행렬의 통계적 타당도 검증 등에서 많은 진전을 이루었다. 이러한 기술적 발전과 잠재적 가능성에도 불구하고 실제 인지진단모형의 적용은 전문가들에 의한 대규모 시험 자료의 분석에 주로 국한되는 문제점을 갖고 있다. 이 연구에서는 일반 단위 학교에서 흔히 볼 수 있는 규모의 영어 듣기평가 자료에 인지진단모형을 적용하여 교수·학습 과정에 유용한 진단 정보를 도출할 수 있는지 조사하였다. 연구 결과에 따르면 소규모 시험 반응 자료에도 인지진단모형의 적용이 가능하나 모형의 축소와 일부 모수 추정값의 불안정성과 같은 문제점을 관찰할 수 있었다. 이 연구에서는 이러한 가능성과 제한성을 바탕으로 인지진단모형의 현장 적용에 관한 문제점과 개선 사항을 논의하고 있다.Cognitive diagnostic modeling(CDM) is intended for fine-grained diagnostic feedback that can facilitate learning and teaching by providing valuable information about students’ current mastery or nonmastry status on a set of skills in a subject domain. CDM has now matured into a comprehensive framework in which researchers and practitioners can find rich and sophisticated models with attribute hierarchies and problem-solving strategies integrated, fast estimation algorithms, efficient model fit checking and comparisons, statistical Q-matrix validation and powerful free softwares specifically developed for CDM. CDM has also received increasing research interest in language testing for the last 20 years or so. Despite these recent developments and inherent potential in CDM, its applications to subject domains including language testing have been carried out by a limited number of researchers who somehow obtained access to large-scale test data from testing programs. This study was to apply a comprehensive cognitive diagnostic model(GDINA) and its nested models to a small data set from an English listening comprehension test and to explore whether a meaningful diagnostic information could be drawn from data that are commonly available in a unit school. The results show that CDM can be successfully applied to the small size data and provide useful diagnostic information. The study also reports and discusses problems as well as issues encountered in the process of CDM applications.

Sequential use of real-time polymerase chain reaction and enzyme-linked immunosorbent assay techniques verifies adulteration of fermented sausages with chicken meat.

ObjectiveDetection of adulteration in processed meats is an important issue for some countries due to substitution of beef with a cheaper source of protein like poultry. In this study, the presence of chicken meat was investigated using real-time polymerase chain reaction (real-time PCR) and enzyme-linked immunosorbent assay (ELISA) techniques to verify adulteration of fermented sausage samples.MethodsA total of 60 commercial samples were collected from 20 establishments in three replicates including 10 fermented sausage manufacturers and 10 butchers to investigate the presence of chicken meat with the sequential use of real-time PCR and ELISA techniques. In addition, pH, moisture content, water activity and color values of the samples were determined.ResultsBoth real-time PCR and ELISA showed agreement on the presence or absence of chicken meat in 55 out of 60 fermented sausage samples and chicken meat was identified with both methods in 16 samples. Five samples produced inconsistent results for the presence of chicken meat in the first run. Nevertheless, the presence of chicken meat was verified with both methods when these samples were analyzed for the second time. In addition, the average physico-chemical values of the fermented sausage samples tested positive for chicken meat were not significantly different from some of those fermented sausage samples tested negative for the chicken meat.ConclusionThe sequential use of real-time PCR and ELISA techniques in fermented sausages could be beneficial for the government testing programs to eliminate false negatives for detection of adulteration with chicken meat. Furthermore, consumers should not rely on some of the quality cues including color to predict the adulteration of fermented sausages with chicken meat since there were no statistical differences among some of the samples tested positive and negative for chicken meat.

Examining the Impacts of Ignoring Rater Effects in Mixed‐Format Tests

AbstractThe use of mixed‐format tests made up of multiple‐choice (MC) items and constructed response (CR) items is popular in large‐scale testing programs, including the National Assessment of Educational Progress (NAEP) and many district‐ and state‐level assessments in the United States. Rater effects, or raters’ scoring tendencies that result in performances receiving different scores than are warranted given their quality, are concerns for the interpretation of scores on CR items. However, there are few published studies in which researchers have systematically considered the impact of ignoring rater effects when they are present on estimates of student ability using large‐scale mixed‐format assessments. Using results from an analysis of NAEP data, we systematically explored the impacts of rater effects on student achievement estimates. Our results suggest that in conditions that reflect many large‐scale mixed‐format assessments, directly modeling rater effects yields more accurate student achievement estimates than estimation procedures that do not incorporate raters. We consider the implications of our findings for research and practice.

Strategic testing approaches for targeted disease monitoring can be used to inform pandemic decision-making.

More than 1.6 million Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) tests were administered daily in the United States at the peak of the epidemic, with a significant focus on individual treatment. Here, we show that objective-driven, strategic sampling designs and analyses can maximize information gain at the population level, which is necessary to increase situational awareness and predict, prepare for, and respond to a pandemic, while also continuing to inform individual treatment. By focusing on specific objectives such as individual treatment or disease prediction and control (e.g., via the collection of population-level statistics to inform lockdown measures or vaccine rollout) and drawing from the literature on capture–recapture methods to deal with nonrandom sampling and testing errors, we illustrate how public health objectives can be achieved even with limited test availability when testing programs are designed a priori to meet those objectives.

RETRACTED: Do educators need metacognitive skills in today’s educational environment?

• Metacognition literally means “thinking about thinking”. • Metacognition is associated with information. • It is easier to find structure in information than in knowledge and skills. The goal of the research was to determine the need of a special training for development of metacognitive skills for teachers to develop their qualifications. The study offers such a program for testing. The novelty of the research lies in the integral study of the relationship between the introduction of the entire group of metacognitive skills with the improvement of pedagogical skills. The study was conducted on the basis of NJSC “Toraighyrov University” (Pavlodar, Kazakhstan). A representative sample included of 160 first year students (81 women and 79 men) in control and experimental groups equal. In the experimental group, the assessment of metacognitive skills according to the Assessing Metacognitive Awareness test is significantly higher than in the control one (r=0.281-0.369; for "Procedural knowledge" r=0.718 for control group; r=0.318-0.784 for experimental group). In the experimental group, there was a moderate and close to strong Pearson's correlation between exam scores and scores of metacognitive skills according to the Assessing Metacognitive Awareness test (from 0.318 to 0.784). The practical use of the results of this study will allow using special programs for improving the metacognitive skills of teachers, focusing on the most difficult to learn from them.

PNS51 Global Survey of Genetic Testing Reimbursement Policies

Genetic testing is critical to optimizing the outcomes of targeted therapies since testing identifies patients who are most likely to benefit from these treatments. Further, product labels may require genetic testing. Thus, it is important to understand current genetic testing reimbursement policies. This study characterized the global reimbursement landscape of genetic testing across thirteen markets. Secondary research through various sources (e.g., insurance policies, fee schedules, laboratory catalogues, government websites, etc.) was conducted to understand current reimbursement mechanisms for genetic testing. Thirteen markets across five continents were surveyed: US, Canada, EU4, UK, Switzerland, Sweden, Japan, China, Brazil, and Australia. Findings on current reimbursement policies and coding infrastructure were synthesized. The presence of manufacturer-sponsored genetic testing was also researched. Several trends in genetic testing reimbursement were identified. While genetic testing is often reimbursed in the majority (10/13, 77%) of surveyed markets, 3/13 (23%) do not provide routine public reimbursement for genetic testing (Australia, Brazil, and China). The coding infrastructure utilized for genetic testing reimbursement varies across the 10/13 (77%) markets with coverage. 6/13 (46%) of markets (USA, France, Germany, Switzerland, Sweden, and Japan) often utilize general genetic testing codes, which are independent of any gene or disease. Codes specific to genes or diseases were found in 3/13 (23%) of markets (UK, Spain, and Canada). In 1/13 (8%) markets (Italy), both general and specific codes were identified. Manufacturer-sponsored genetic testing programs were identified in all markets across various diseases. These programs encompassed both direct patient sponsorship and more indirect avenues such as grants to research or patient advocacy organizations. Reimbursement of genetic testing varies globally across markets. Since securing reimbursement can be a complex process which differs across markets, sponsors should carefully assess any reimbursement barriers and consider mitigation tactics in order to increase access and uptake for products that require genetic testing.

COVID-19 Testing to Sustain In-Person Instruction and Extracurricular Activities in High Schools - Utah, November 2020-March 2021.

Cessation of kindergarten through grade 12 in-person instruction and extracurricular activities, which has often occurred during the COVID-19 pandemic, can have negative social, emotional, and educational consequences for children (1,2). Although preventive measures such as masking, physical distancing, hand hygiene, and improved ventilation are commonly used in schools to reduce transmission of SARS-CoV-2, the virus that causes COVID-19, and support in-person instruction (3-6), routine school-based COVID-19 testing has not been as widely implemented. In addition to these types of standard preventive measures, Utah health and school partners implemented two high school testing programs to sustain extracurricular activities and in-person instruction and help identify SARS-CoV-2 infections: 1) Test to Play,* in which testing every 14 days was mandated for participation in extracurricular activities; and 2) Test to Stay,† which involved school-wide testing to continue in-person instruction as an alternative to transitioning to remote instruction if a school crossed a defined outbreak threshold (3). During November 30, 2020-March 20, 2021, among 59,552 students tested through these programs, 1,886 (3.2%) received a positive result. Test to Play was implemented at 127 (66%) of Utah's 193 public high schools and facilitated completion of approximately 95% of scheduled high school extracurricular winter athletics competition events.§ Test to Stay was conducted at 13 high schools, saving an estimated 109,752 in-person instruction student-days.¶ School-based COVID-19 testing should be considered as part of a comprehensive prevention strategy to help identify SARS-CoV-2 infections in schools and sustain in-person instruction and extracurricular activities.

Radon in Schools: A Review of Radon Testing Efforts in Canadian Schools.

Radon, a known carcinogen, becomes a health risk when it accumulates inside buildings. Exposure is of particular concern for children, as their longer life expectancy increases their lifetime risk of developing cancer. In 2016, 5.5 million students were enrolled in Canadian elementary and secondary schools. With no national policy on radon testing in schools, children may be at risk from radon exposure while attending school and school-based programs. This study explored radon testing efforts in publicly funded Canadian schools and summarizes where testing programs have occurred. Radon testing in schools was identified through a systematic qualitative enquiry, surveying members from different levels of government (health and education) and other stakeholders (school boards, research experts, among others). Overall, this research found that approaches to radon testing varied considerably by province and region. Responsibility for radon testing in schools was often deferred between government, school boards, building managers and construction parties. Transparency around radon testing, including which schools had been tested and whether radon levels had been mitigated, also emerged as an issue. Radon testing of schools across Canada, including mitigation and clear communication strategies, needs to improve to ensure a healthy indoor environment for staff and students.

Controlling COVID-19 via test-trace-quarantine

Initial COVID-19 containment in the United States focused on limiting mobility, including school and workplace closures. However, these interventions have had enormous societal and economic costs. Here, we demonstrate the feasibility of an alternative control strategy, test-trace-quarantine: routine testing of primarily symptomatic individuals, tracing and testing their known contacts, and placing their contacts in quarantine. We perform this analysis using Covasim, an open-source agent-based model, which has been calibrated to detailed demographic, mobility, and epidemiological data for the Seattle region from January through June 2020. With current levels of mask use and schools remaining closed, we find that high but achievable levels of testing and tracing are sufficient to maintain epidemic control even under a return to full workplace and community mobility and with low vaccine coverage. The easing of mobility restrictions in June 2020 and subsequent scale-up of testing and tracing programs through September provided real-world validation of our predictions. Although we show that test-trace-quarantine can control the epidemic in both theory and practice, its success is contingent on high testing and tracing rates, high quarantine compliance, relatively short testing and tracing delays, and moderate to high mask use. Thus, in order for test-trace-quarantine to control transmission with a return to high mobility, strong performance in all aspects of the program is required.

Using Assisted Partner Services for HIV Testing and the Treatment of Males and Their Female Sexual Partners: Protocol for an Implementation Science Study.

BackgroundDespite the effective scale-up of HIV testing and treatment programs, only 75% of people living with HIV (PLWH) globally know their status, and this rate is lower among men. This highlights the importance of implementing HIV testing and linkage interventions with a high uptake in this population. In a cluster randomized controlled trial conducted in Kenya between 2013 and 2015, we found that assisted partner services (APS) for HIV-exposed partners of newly diagnosed PLWH safely reached more HIV-exposed individuals with HIV testing compared with client referral alone. However, more data are needed to evaluate APS implementation in a real-world setting.ObjectiveThis study aims to evaluate the effectiveness, acceptability, fidelity, and cost of APS when integrated into existing HIV testing services (HTS) in Western Kenya.MethodsOur study team from the University of Washington and PATH is integrating APS into 31 health facilities in Western Kenya. We are enrolling females newly diagnosed with HIV (index clients) who consent to receiving APS, their male sexual partners, and female sexual partners of male sexual partners who tested HIV positive. Female index clients and sexual partners testing HIV positive will be followed up at 6 weeks, 6 months, and 12 months postenrollment to assess linkage to care, antiretroviral therapy initiation, and HIV viral load suppression. We will evaluate the acceptability, fidelity, and cost of real-world implementation of APS via in-depth interviews conducted with national, county, and subcounty-level policy makers responsible for HTS. Facility health staff providing HTS and APS, in addition to staff working with the study project team, will also be interviewed. We will also conduct direct observations of facility infrastructure and clinical procedures and extract data from the facilities and county and national databases.ResultsAs of March 2020, we have recruited 1724 female index clients, 3201 male partners, and 1585 female partners. We have completed study recruitment as well as 6-week (2936/2973, 98.75%), 6-month (1596/1641, 97.25%), and 12-month (725/797, 90.9%) follow-up visits. Preliminary analyses show that facilities scaling up APS identify approximately 12-18 new HIV-positive males for every 100 men contacted and tested. We are currently completing the remaining follow-up interviews and incorporating an HIV self-testing component into the study in response to the COVID-19 pandemic.ConclusionsThe results will help bridge the gap between clinical research findings and real-world practice and provide guidance regarding optimal strategies for APS integration into routine HIV service delivery.International Registered Report Identifier (IRRID)DERR1-10.2196/27262

Building Intuition Regarding the Statistical Behavior of Mass Medical Testing Programs

The quality of medical decision-making and public health planning alike depends directly upon understanding the accuracy of medical tests, especially during a pandemic. But the statistical concepts and measures used to assess test accuracy can be confusing. Why is there not one single definitive measure of test accuracy? How much should individuals worry about spreading COVID-19 if their test results are negative? What do sensitivity, specificity, false positive results, false negative results, and positive predictive value mean relative to each other? In this tutorial, we clarify the meaning of these terms in intuitive ways via visual illustrations, and explain how these terms are all connected to one another through Bayes’ theorem. We show how to use the relationships in that theorem to assess personal risk when large numbers of people are being tested. We illustrate as well the extent to which the accuracy of large numbers of tests depends on the proportion of those tested who have the disease. Overall, we aim to heighten a general intuition regarding the performance of mass medical testing campaigns. Here, toward that end, we review different ways to measure the accuracy of diagnostic tests with reference to pandemic-specific examples.

Advancing the International Recognition of the Locally-Produced GEPT: An Interview with Jessica Wu

ABSTRACT Jessica Wu is Research and Development Program Director at the Language Training and Testing Center (LTTC) in Taipei, Taiwan. Jessica has been deeply involved in the development and validation of the General English Proficiency Test (GEPT) in addition to a number of other foreign language testing programs. Her research focuses on speaking assessment and the impact of standardized language testing. Jessica is a founding member of the Asian Association for Language Assessment (AALA), for which she has served as both co-president (2016 to 2017) and president (2018 to 2019). She currently serves as an advisor for the development and administration of L1 tests (i.e., Hakka, Southern Min, and Indigenous language proficiency certifications) in Taiwan. Jessica has authored a number of publications, including articles and book chapters in the field of language testing, and has presented her work at conferences around the world. Most recently, she co-edited English Language Proficiency Testing in Asia: A New Paradigm Bridging Global and Local Contexts with Cyril Weir and I-Wen Su. Her contributions to language testing are significant and immeasurable, particularly with regard to Asia. The following interview with Jessica, which was conducted via an online meeting platform due to the COVID-19 pandemic, took place in January 2021.

Developing an ethical framework for asymptomatic COVID-19 testing programmes in higher education institutions

Background: Mass asymptomatic COVID-19 testing programmes are being introduced in a range of settings, including in higher education institutions (HEIs). We aimed to produce an ethical framework to identify the range of ethical considerations relevant to HEI testing programmes and to support organisational decision-making. Methods: We conducted a mixed-method consultation (survey and semi-structured interviews) with students and staff at a case study university that was running a student testing programme. Survey data were analysed descriptively; data analysis for interviews was based on the Framework method. The findings of the consultation were combined with literature review, legal/ethical analysis and expert views to produce an ethical framework. Results: A total of 239 people took part in the consultation: 213 completed surveys (189 students, 24 staff) and 26 (16 students, 7 staff) participated in interviews. The survey identified clear support (99% of survey respondents) for the testing programme. Around two-thirds (62%) supported non-mandatory participation. Over half (54%) felt that the programme would need to be at least moderately effective to be acceptable. Over three-quarters (76%) felt the university had some responsibility to run a testing programme. Synthesis of consultation findings and further analysis identified nine areas of ethical consideration for HEIs looking to implement mass asymptomatic testing programmes: design and operation; goals; properties of the test; enabling isolation; choices about participation; benefits, harms and opportunity costs; responsibilities between students and institutions; privacy, confidentiality and data-sharing; and communication. The ethical framework includes recommendations in each of these areas, with illustrative examples of how they might be put into practice. Conclusions: By identifying ethical considerations relevant to university student testing programmes using analysis and consultation, the framework we developed has potential to facilitate deliberation about ethical aspects of such programmes, as well as informing decision-making about their introduction, design and delivery.

A spatial analysis of the epidemiology of HIV-infected students in Zhejiang province, China

BackgroundThe upsurge in HIV infections among students is a matter of particular concern. However, few studies have explored the epidemiological characteristics including the risky sexual networking of HIV-infected students in Zhejiang province, China.MethodsUsing the provincial surveillance data of HIV-infected students, we conducted a retrospective epidemiology study to describe the epidemiological characteristics of 628 newly diagnosed cases from 2011 to 2016 and detailed information of 124 cases from 2015 to 2016. Spatial analyses were conducted using ArcGIS software, and statistical analyses were performed using SPSS software.ResultsA total of 628 cases of HIV/AIDS were diagnosed among students in Zhejiang Province, China between 2011 and 2016. The cases showed an overall increasing trend over time, while the proportions of students with HIV disease status, cases diagnosed by HIV voluntary counseling and testing (VCT), and cases of homosexual transmission remained stable over time. Significant spatial heterogeneity in the cases was seen at the county level. Detailed data on 124 HIV-positive individuals collected from the local Center for Disease Control and Prevention (CDC) from 2015 and 2016, showed that the majority of them (85.5%,) engaged in homosexual behavior, and 93.4% had sex with casual partners. These partners included not only social members, but also other students. Online dating applications represented the most common means of seeking and communicating with homosexual partners. The level of awareness regarding the risk of HIV infection, and the amount coverage of face-to-face education towards students were both low.ConclusionsHIV infections among students were characterized by increasing trend and spatial clustering in Zhejiang Province between 2011 and 2016, with homosexual sexual activity being the main mode of infection. Interventions are urgently required to prevent HIV infection in this population by increasing awareness of the disease. HIV testing programs and information regarding disease prevention specifically through online dating applications are needed.

The influence of working environment to employee performance mediated by work motivation

This study examines the effect of work environment on retail store employee performance in Malang, Indonesia with the role of work motivation as a mediation. Respondents in this study used 152 respondents who were millennials employees of retail stores in Malang Indonesia. This study uses a statistical analysis of the Structured Equation Model and Partial Least Square. WarpPLS is used as a data processing program for hypothesis testing. The test results show that the work environment has a significant effect of 0.259 on employee performance. The work environment at the retail stores also has a significant effect of 0.742 on work motivation. Work motivation also provides significant results on employee performance of 0.234. The mediating role of work motivation on the work environment and employee performance in retail stores throughout Malang, Indonesia has a significant mediating effect of 0.170

RANCANG BANGUN SISTEM TRACKING JASA LAUNDRY SEPATU DI CLINIX SHOES CARE BERBASIS WEBSITE

The matter of time still being an important thing in a shoe’s laundry services, because it can take a long time to get a shoes laundry. That’s why it required a tracking system to checking a status from our shoes at the clinix shoes and care laundry. The making of this system uses the method, waterfall starting from requirements analysis, system design, writing program code, testing programs, implementing programs, and writing program code in a structured manner. Writing program code using PHP, MySQL database and using the framework. With Codeigniter 3 this tracking system, customers can input the receipts provided by the admin clinix shoes care, to find out the status of shoes being laundered, and in this tracking system the customer can also check rates laundry.

Совместное использование технологий OpenMP и MPI на узлах вычислительного кластера

This work is devoted to the problem of implementing an efficient parallel program that solves the asigned task using the maximum available amount of computing cluster resources in order to obtain the corresponding gain in performance with respect to the sequential version of the algorithm. The main objective of the work was to study the possibilities of joint use of the parallelization technologies OpenMP and MPI, considering the characteristics and features of the problems being solved, to increase the performance of executing parallel algorithms and programs on a computing cluster. This article provides a brief overview of approaches to calculating the sequential programs complexity functions. To determine the parallel programs complexity, an approach based on operational analysis was used. The features of the sequential programs parallelization technologies OpenMP and MPI are described. The main software and hardware factors affecting the execution speed of parallel programs on the nodes of a computing cluster are presented. The main attention in this paper is paid to the study of the impact on performance of computational and exchange operations number ratio in programs. To implement the research, parallel OpenMP and MPI testing programs were developed, in which the total number of operations and the correlation between computational and exchange operations are set. A computing cluster consisting of several nodes was used as a hardware and software platform. Experimental studies have made it possible to confirm the effectiveness of the hybrid model of a parallel program in multi-node systems with heterogeneous memory using OpenMP in shared memory subsystems, and MPI in a distributed memory subsystems