Lack Of Flow Research Articles

Deterministic Ansätze for the measurement-based variational quantum eigensolver

Measurement-based quantum computing (MBQC) is a promising approach to reducing circuit depth in noisy intermediate-scale quantum algorithms such as the variational quantum eigensolver (VQE). Unlike gate-based computing, MBQC employs local measurements on a preprepared resource state, offering a trade-off between circuit depth and qubit count. Ensuring determinism is crucial to MBQC, particularly in the VQE context, as a lack of flow in measurement patterns leads to evaluating the cost function at irrelevant locations. This study introduces MBVQE-ansätze that respect determinism and resemble the widely used problem-agnostic hardware-efficient VQE ansatz. We evaluate our approach using ideal simulations on the Schwinger Hamiltonian and XY-model and perform experiments on IBM hardware with an adaptive measurement capability. In our use case, we find that ensuring determinism works better via postselection than by adaptive measurements at the expense of increased sampling cost. Additionally, we propose an efficient MBQC-inspired method to prepare the resource state, specifically the cluster state, on hardware with heavy-hex connectivity, requiring a single measurement round, and implement this scheme on quantum computers with 27 and 127 qubits. We observe notable improvements for larger cluster states, although direct gate-based implementation achieves higher fidelity for smaller instances.

Sources of per- and polyfluoroalkyl substances in an arid, urban, wastewater-dominated watershed

Per- and polyfluoroalkyl substances (PFAS) enter surface waters from various sources such as wastewater treatment plants, fire-fighting sites, and PFAS-producing and PFAS-using industries. The Las Vegas Wash in Southern Nevada of the United States (U.S.) conveys wastewater effluent from the Las Vegas metropolitan area to Lake Mead, a drinking water source for millions of people in the U.S. Southwest. PFAS have previously been detected in the Las Vegas Wash, but PFAS sources were not identified. In this study, upstream wash tributaries, wastewater treatment effluents, and shallow groundwater wells were sampled in multiple campaigns during dry-weather conditions to investigate possible PFAS sources. Out of 19 PFAS, two short-chain PFAS—perfluoropentanoic acid (48 % of the total molar concentration) and perfluorohexanoic acid (32 %)—comprised the majority of PFAS loading measured in the Las Vegas Wash, followed by perfluorooctanoic acid (9 %). On a mass loading basis, the majority of total measured PFAS (approximately 90 %) and at least 48 % of each specific PFAS in the Las Vegas Wash likely entered via municipal wastewater effluents, of which the main source was likely residential wastewater. One of the drainage areas with a major civilian airport was identified as a potential source of relatively enriched perfluorosulfonic acids to a small wash tributary and shallow groundwater samples. Nonetheless, that tributary contributed at most 15 % of any specific PFAS to the mainstem of the Las Vegas Wash. Total PFAS concentrations were relatively low for the small tributary associated with an urban smaller airport and the lack of flow in the tributary channel immediately downgradient of an Air Force base indicates the smaller airport and base were unlikely significant PFAS sources to the Las Vegas Wash. Overall, this study demonstrated effective PFAS source investigation methodology and the importance of wastewater effluent as a PFAS environmental pathway.

Thromboembolic Events in the Posterior Circulation After Flow Diversion—A Closer Look at Coverage of the Posterior Cerebral Artery

Flow diversion for bifurcation aneurysms requires excluding one of the branches from the parent artery, raising concern for ischemic events. We evaluated thromboembolic events and their relationship with covering the origin of the posterior cerebral artery (PCA). This retrospective analysis included patients with confirmed basilar and proximal PCA aneurysms treated with flow diversion between 2013 and 2023. Procedures were classified according to the coverage of the origin of the PCA. Thromboembolic events associated with the excluded PCA were evaluated. Of the total 28 aneurysms included, 7 were at the basilar tip, 16 in the basilar trunk, and 5 in the first segment of the PCA; 15 were treated by excluding one of the PCAs. Dual antiplatelet therapy included aspirin and ticagrelor (57.1%), aspirin and clopidogrel (35.7%), or aspirin and prasugrel (3.57%). Complete and near-complete aneurysm occlusion was achieved in 80.8% of the aneurysms treated at a median follow-up of 12.31 months. Thromboembolic complications occurred in 3 patients (2 with basilar perforator stroke and 1 with basilar in-stent thrombosis). However, the difference in these events was not statistically significant between patients with PCA coverage and those without (P= 0.46). Diminished flow and a lack of flow was seen in 8 and 7 of the covered vessels, respectively. A modified Rankin scale score of ≤2 was reported for 89.3% of patients at a median clinical follow-up of 5.5 months. The incidence of thromboembolic events is high in distal basilar and proximal PCA aneurysms; however, PCA coverage was not associated with their occurrence. There was no difference in postprocedural disability between patients whose aneurysms were treated by excluding one of the PCAs and those who were not.

A three-dimensional vessel-on-chip model to study Puumala orthohantavirus pathogenesis.

Puumala orthohantavirus (PUUV) infection in humans can result in hemorrhagic fever with renal syndrome. Endothelial cells (ECs) are primarily infected with increased vascular permeability as a central aspect of pathogenesis. Historically, most studies included ECs cultured under static two-dimensional (2D) conditions, thereby not recapitulating the physiological environment due to their lack of flow and inherent pro-inflammatory state. Here, we present a high-throughput model for culturing primary human umbilical vein ECs in 3D vessels-on-chip in which we compared host responses of these ECs to those of static 2D-cultured ECs on a transcriptional level. The phenotype of ECs in vessels-on-chip more closely resembled the in vivo situation due to higher similarity in expression of genes encoding described markers for disease severity and coagulopathy, including IDO1, LGALS3BP, IL6 and PLAT, and more diverse endothelial-leukocyte interactions in the context of PUUV infection. In these vessels-on-chip, PUUV infection did not directly increase vascular permeability, but increased monocyte adhesion. This platform can be used for studying pathogenesis and assessment of possible therapeutics for other endotheliotropic viruses even in high biocontainment facilities.

Study of neutron density fluctuation and neutron-proton correlation in Au+Au collisions using PYTHIA8/Angantyr* *Supported in part by the Natural Science Foundation of Henan Province, China (212300410386), the Key Research Projects of Henan Higher Education Institutions (20A140024), the Scientific Research Foundation of Hubei University of Education for Talent Introduction (ESRC20220028, ESRC20230002), the NSFC (12005114) and NSFC key Grant (12061141008), and the

Utilizing the PYTHIA8 Angantyr model, which incorporates the multiple-parton interaction (MPI) based color reconnection (CR) mechanism, we study the relative neutron density fluctuation and neutron-proton correlation in Au+Au collisions at = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV. In this study, we not only delve into the dependence of these two remarkable observations on rapidity, centrality, and energy, but also analyze their interplay with the MPI and CR. Our results show that the light nuclei yield ratio of protons, deuterons, and tritons, expressed by the elegant expression , remains unchanged even as the rapidity coverage and collision centrality increase. Interestingly, we also reveal that the effect of CR is entirely dependent on the presence of the MPI; CR has no impact on the yield ratio if the MPI is off. Our findings further demonstrate that the light nuclei yield ratio experiences a slight increase with increasing collision energy, as predicted by the PYTHIA8 Angantyr model; however, it cannot describe the non-monotonic trend observed by the STAR experiment. Based on the Angantyr model simulation results, it is essential not to overlook the correlation between neutron and proton fluctuations. The Angantyr model is a good baseline for studying collisions in the absence of a quark-gluon plasma system, given its lack of flow and jet quenching.

Going with(out) the flow at home: day-to-day variability in flow and performance while teleworking

ABSTRACT Prior research suggests that telework often is associated with higher job performance. However, this research primarily has treated days teleworking as interchangeable with one another. Given the recent surge in telework, it is important to ask how much performance varies among days spent working at home and what psychological and contextual factors explain such within-person variability. This information can assist organizations deciding how to best implement policies and support workers at home. Here, we suggest that intrusions and social isolation are obstacles to achieving flow while teleworking, such that higher daily levels of each will hinder flow on those days. In turn, this lack of flow should be associated with worsened daily performance while teleworking. To investigate these ideas, we asked 97 teleworkers to respond to a series of daily measures for up to four days (296 data points). Results showed that performance varied significantly among teleworking days, with both daily intrusions and daily isolation negatively predicting flow, which further mediated the relationship between intrusions and reduced task performance. Isolation did not significantly mediate this relationship. Moreover, conscientious individuals were especially able to leverage higher flow for performance. We discuss implications of these results.

Fetal pulmonary valvuloplasty for pulmonary atresia with intact ventricular septum: a single-center clinical experience.

Fetal pulmonary valvuloplasty for pulmonary atresia with intact ventricular septum: a single-center clinical experience.

Using chatbots for English language learning in higher education

Despite the advancement of Chatbot technology, little is known about its affordances for language learning, especially in the context of Malaysian higher education institutions. Adapting the Push-Pull Mooring-Habit (PPMH) theoretical framework, this mixed-methods study examined Malaysian university students' experience in using Chatbots for English language learning, focusing on four main aspects; Performance Expectancy, Effort Expectancy, Social Isolation and Covid-19 Fear. A total of 360 undergraduate students from three public universities in Malaysia completed the questionnaire after being engaged with chatbots for three months. Twenty of them were also interviewed for an in-depth understanding of the phenomenon being investigated. The analysis reveals that Performance and Effort Expectancies contribute to the positive experience of using Chatbots for language learning hence serving as the Pull factors. Whereas Social Isolation contributed by the sense of robotic interaction, emotionlessness, and lack of flow in conversation serves as the Push Factor in using Chatbots for language learning. Despite the students’ disagreements with the social influence of Chatbots on their behavioural intentions, Chatbots are still considered beneficial enough to serve as an interlocutor for English language learning.

P50: Save leg: using contralateral femoral inflow for distal perfusion catheter placed for Impella CP

Background: Leg ischemia is a possible complication of percutaneous left ventricular device (Impella CP TM) placement. To avoid leg ischemia in atrisk patients, a distal perfusion catheter (DPC) should be placed. The DPC can be connected to the wire-reaccess port of the Impella CP as an inflow to the DPC to perfuse the leg. However, the wire-reaccess port of the Impella was not designed to bypass arterial blood to the distal limb, but rather for wire passage. We introduced a passive distal perfusion system from the contralateral femoral artery to optimize blood flow to the distal limb. Methods: A 65 year-old female with dilated cardiomyopathy developed refractory ventricular tachycardia. She was taken to the catherization laboratory because of hemodynamic instability requiring high doses of vasopressors. By left heart catheterization, we noted normal coronary arteries with elevated left ventricular end-diastolic pressure (38 mm Hg) and a poor cardiac index. Thus, Impella CP was placed from the right groin to stabilize her hemodynamics. A DCP was placed on right distal femoral artery and connected to the wire-reaccess port of the Impella CP. The leg appeared perfused by DPC via reaccess port in the catherization laboratory; however, despite this as well as appropriate anticoagulation, the leg became ischemic (cold leg, low leg regional saturation) shortly after admission to the ICU, where a lack of flow in the DPC was confirmed. Results: An additional contralateral femoral arterial line was placed. The contralateral femoral arterial line was then connected to the DPC (figure), and the reaccess port of the Impella was capped. Shortly after placement of the new DPC system, the pulse was returned and leg saturation improved. Additionally, leg ischemia during Impella support did not reoccur. Conclusion: A DPC using the Impella CP reaccess port provided inadequate distal flow. When a DPC is indicated during femoral Impella CP use, the contralateral femoral artery should be chosen for inflow cannulation. Figure 1. Impella CP and distal perfusion catheter (DPC) in the right femoral artery. The arterial line in the left femoral artery is feeding DPC in the right femroal artery.

Factors contributing to the mental health outcomes of carers during the transition of their family member to residential aged care: a systematic search and narrative review

ObjectivesThe transition of an older family member into a residential aged care facility (RACF) is often challenging for both the person being admitted and their family carer. This review aimed to identify the protective and contributing factors to adverse mental health outcomes among family carers following the decision to move a family member to a RACF.MethodA search of CINAHL, PubMed and PsycINFO was conducted for empirical papers published in English between 2004 and 2019, exploring the mental health or quality of life (QoL) of family carers of those recently admitted, or considering admission, to a RACF. Articles were reviewed by two authors for inclusion.ResultsTwenty-three studies met the inclusion criteria. Pre-existing depressive symptoms and poor subjective health were related to adverse mental health outcomes following admission. Information from the facility, support to change roles, and factors related to carer’s health and demographics, were associated with changes in the mental health outcomes of carers during the transition of their relative to a RACF. Key protective factors of carer’s mental health outcomes following the transition of their relative to a RACF are flow and transparency of information between carer and the facility staff, and staff efforts to involve carers in providing emotional support to their relative, in monitoring care, and advocating for their quality of life.ConclusionThere is evidence to suggest factors such lack of flow and transparency of information between carer and the facility staff may predispose carers to poor mental health and QoL following the transition of a relative to a RACF. Key protective factors of carer’s mental health following admission are staff efforts to involve carers in providing emotional support to their relative, in monitoring care, and advocating for their quality of life. This review also indicates that the combination of factors that puts family carers more at risk of poor mental health and lower quality of life throughout the transition period. Policy and practice should follow recommendations that consider a combination of the above factors when addressing the needs of family carers before and after admission of an older person to RACF.

Vascular myogenic control of tibial bone blood flow in young healthy individuals

Bone health is critically dependent on adequate blood flow supplied by its extensive vascular network. Without adequate perfusion to provide oxygen and essential nutrients critical for bone metabolism, nearly all skeletal functions are compromised. However, despite the importance of blood flow to bone, regulation of bone blood flow is poorly understood in humans. The broad hypothesis of the current work is that the primary regulators of blood flow to bone are not different from other vascular beds. We have recently shown that sympathetic innervation of the bone vasculature has an active role in controlling bone blood flow in young healthy individuals. This work furthers our previous findings by investigating additional key bone blood flow regulators ‐ myogenic vasodilation and vasoconstriction. While vascular myogenic control has been investigated in soft tissue, to our knowledge there has been no research in the bone vasculature in humans, with only a handful of animal studies.In young healthy individuals (N=8), we characterized myogenic control of tibial blood flow via novel custom‐made near infrared spectroscopy (NIRS). Tibial blood flow via NIRS was measured as oxy‐, deoxy‐, and total hemoglobin (Hb). We employed reactive hyperemia and leg dependency to assess myogenic vasodilation and vasoconstriction in the whole calf and in the tibia. The magnitude of maximum myogenic vasodilation was defined by the peak reactive blood flow response to sustained ischemia. Arterial flow to the lower leg was occluded by rapidly inflating a pneumatic thigh cuff above the knee to 220 mmHg in supine subjects. Tibial blood flow was assessed via NIRS and whole leg blood flow velocity in the popliteal artery of the same leg was measured via Doppler ultrasound during 1 min of rest, 10 min of cuff inflation, and 5 min of recovery. Myogenic vasoconstriction was assessed via leg dependency, i.e., during two levels of increased transmural pressure achieved by lowering the leg below heart level. Only tibial blood flow was assessed during 5 min in supine position, 5 min in seated upright position, and 5 min in seated position with legs lowered at 90deg knee flexion.During cuff occlusion, there was a time dependent decrease in bone oxyHb accompanied by an increase in deoxyHb indicating lack of flow with continued metabolism. Tibial total Hb (sum of oxy‐ and deoxy‐Hb) did not change significantly during cuff inflation, but increased rapidly and markedly with cuff release, far surpassing baseline values when flow was restored. A similar overshoot response was seen in whole leg blood flow with cuff release. Thus, the response of tibial flow to reactive hyperemia follows the same behavior as the whole limb, indicating an active myogenic vasodilator response in bone similar to other vascular beds. During leg dependency, despite increases in arterial perfusion pressure at both levels (ΔP, 25.8 + 3.67, and 40.0 + 3.02 mmHg), there was no change in tibial flow (total Hb, ‐0.39 + 7.40, and ‐0.29 + 16.2 μM). Hence, unchanged tibial flow despite increased pressure indicates a compensatory vasoconstrictor response in the tibia. Our results indicate that similar to other vascular beds, myogenic control plays an active role in regulating the bone vasculature in young healthy individuals. Characterizing blood flow regulation in bone constitutes the basis of defining its role in overall bone health and its contribution to numerous bone loss conditions.

Exploring the delivery of community rehabilitation services for older people in an urban Canadian setting: Perspectives of service providers, managers and health system administrators.

As the global population of older people increases, policies aimed at improving health care delivery for older people often include supports for ageing in place. Living in the community not only reduces institutionalisation but also improves quality of life and reduces health care costs. For older people, community rehabilitation offers the opportunity to preserve and maximise function while maintaining the ability to live in the community. However, limited research examines the delivery, coordination and integration of community rehabilitation services in health systems. Our case study explored the perspectives of service providers, managers and health system administrators on the strengths, limitations and gaps in community rehabilitation for older people in one Canadian urban health region. Using interpretive description and thematic analysis, we analysed interview data from: 16 service providers, eight managers and five health system administrators. Three themes were identified: (a) Limited Access to Programs and Services; (b) Need to Emphasise Promoting, Maintaining and Restoring Function; and (c) Lack of Flow Across the System. Participants highlighted that restrictive eligibility criteria limited access to services. Services were organised around health conditions that did not address the needs of older people. Long waitlists meant that services were delayed. Transportation costs limited participation of individuals from lower socioeconomic status (SES). Age restrictions did not reflect differences in the ageing process and the health inequities individuals from lower SES groups experienced. There was a lack of emphasis in community rehabilitation programs on maintaining or restoring function in older people, which is the primary focus of rehabilitation. Furthermore, key stakeholders stressed the need for strengthening the integration of service delivery across the continuum of care. The findings underscore the need to develop a conceptual framework for community rehabilitation to promote greater system integration, access and availability of services and to optimise functional outcomes for older people.

Effects of stream permanence on stonefly (Insecta, Plecoptera) community structure at Mammoth Cave National Park, Kentucky, USA.

Stoneflies (Plecoptera) are often associated with inhabiting cold perennial streams, but many species also inhabit intermittent streams that experience reduced or lack of flow during summer and autumn. In this study, the influence of stream permanence on stonefly assemblage composition and spatial distribution at Mammoth Cave National Park, Kentucky, USA, was addressed, based on a 14 month sampling regime from the fullest range of stream sizes and habitable flow regions available. Adult stoneflies were collected monthly from 43 sites at the Park plus an additional two sites at the near-adjacent Western Kentucky University Green River Preserve. Collections were done from December 2018–November 2019 using a standard timed protocol with beating sheets for adults and once in December 2019–January 2020 for larvae. Stream sites were assigned one of five category types: perennial spring runs, perennial spring seeps, upland perennial streams, perennial riverine and summer dry runs. In total, 34 species were collected. The most prominent difference in stonefly community structure was between spring runs, spring seeps and summer dry streams vs. upland perennial streams. Approximately 88% of species collected had univoltine-fast life cycles and 79% likely had an extended period of egg or larval diapause. Due to the predominance of small upland perennial and summer dry streams, species commonly typically found in larger lotic systems are fundamentally filtered out of the region due to the lack of available habitats. Species able to survive in intermittent habitats do so by life history adaptations including to survive desiccation as larvae or eggs.

AIUM Practice Parameter for the Performance of Sonohysterography and Hysterosalpingo-Contrast Sonography.

AIUM Practice Parameter for the Performance of Sonohysterography and Hysterosalpingo-Contrast Sonography.

RENAL VEIN THROMBOSIS AT HIGH ALTITUDE

Though risk of venous thromboembolism in increased at high altitude, involvement of renal veins is rare. A 27-year-old soldier was evacuated from a height of 18000 feet after developing flank pain and haematuria. Ultrasound showed an enlarged left kidney and lack of flow in proximal renal vein. CT scan confirmed the presence of renal vein thrombus. Serum IgM Anti β-2 Glycoprotein I antibodies, IgG Anti β-2 Glycoprotein I antibodies and IgM anticardiolipin antibodies were detectable and the former two were present after three months also. Secondary causes of antiphospholipid syndrome were excluded. He was started on low molecular weight heparin and is now on lifelong oral anticoagulation with warfarin.

Understanding flow properties of mannitol powder at a range of temperature and humidity

Inadequate flowability of powders in industries during handling can cause many problems. For example, lack of flow from hoppers, poor tablet weight consistency, and low production rate in tableting. Many factors are known to commonly affect flow properties of powders, such as temperature, humidity and conditioning duration. In this paper, flow properties of a mannitol powder, which was conditioned between 24 and 72 h at various high relative humidities and temperature, were measured using a shear tester. A statistical model was developed to investigate the relative importance of these variables on the mannitol flow properties. The developed model showed all independent variables are significant in estimating bulk cohesion. Two separate approaches were used to evaluate inter-particle forces in the bulk, and how these changed with environmental conditions. First, inter-particle forces were inferred from the measured bulk properties using the Rumpf model approach. Secondly, inter-particle forces were predicted based on a model of moisture present on the particle surface using a combination of Kelvin model with the Laplace-Young (KLY) equation. The second approach also involved a new method to measure surface energy of mannitol powder based on measurements using Finite Dilution Inverse Gas Chromatography (FD-IGC). The surface energies of the mannitol powder were measured at high temperature (35 °C) and at different range of relative humidities. In spite of the fundamentally different approaches to the two ways of inferring inter-particles forces, these forces came out within less than 1.5:1 in magnitude. The Rumpf approach from bulk behaviour data obviously reflected the measured change in behaviour with humidity in particular, but this was not predicted from the KLY approach, however the likely reasons for this are postulated and recommendations for improvement are made.

Negotiating Engagement, Worthiness of Care and Cultural Identities Through Intersubjective Recognition: Migrant Patient Perspectives on the Cultural Formulation Interview in Danish Mental Healthcare.

This qualitative study presents migrant patient perspectives on using theCultural Formulation Interview (CFI) in mental health assessments in Denmark. Empirical data consisted of 20 recorded CFI sessions and 16 patient interviews, coded with a constructivist grounded theory approach. Empirical findings prompted us to draw on the theoretical framework of intersubjective recognition in the analytical process. Our analysis showed how patients had multiple previous experiences of misrecognition in life and healthcare. This seemed to restrain their self-esteem and available positions for expressing preferences and reservations during the CFI and led to negotiations of worthiness of care. Despite occasional lack of flow and information in the recorded CFI sessions, patients subsequently recounted how they felt the CFI recognised the complexity and context of their cultural identities and illness narratives. Patients described how the CFI-guided provider approach of curiosity and empowerment carried significant meaning and left them feeling dignified, hopeful and engaged in future care. Intersubjective recognition is fundamental in all human interaction, but we argue that the recognising CFI approach is particularly important in vulnerable and asymmetrical mental health assessment encounters where access to care is determined and when working with migrants or other marginalised groups.

Nurse-initiated protocols in the emergency department management of pediatric oncology patients with fever and suspected neutropenia: a scoping review protocol.

The objective of this review is to provide an overview of the existing evidence regarding nurse-initiated protocols in the emergency department management of pediatric oncology patients with fever and suspected neutropenia. Febrile neutropenia in pediatric oncology patients poses a significant burden of increased morbidity and mortality. Prompt, efficient emergency care and rapid antibiotic administration within 60 minutes of presentation to hospital is required to prevent clinical deterioration and reduce rates of intensive care admission and mortality. Efficient emergency department care delivery is impacted by modern day challenges, such as increasing user-demand, limited resources, and lack of flow. In response to this, to expedite care provision, practice guidelines have been developed to include nurse-initiated protocols that guide nurses to initiate specific predetermined investigations and interventions for patients meeting certain criteria. Febrile neutropenic pediatric patients may be a specific group that can benefit from nurse-initiated protocols due to the time-critical nature of required care. The scoping review will consider literature that reports on nurse-initiated protocols in the management of pediatric febrile oncology patients with suspected neutropenia in the emergency department setting. JBI methodology for scoping reviews will guide the review process. English-language literature from 2000 to present will be searched in Embase, MEDLINE, Scopus, Emcare, CINAHL Plus, and gray literature in Google Scholar, Open Grey, and Theses Global. Critical appraisal will not be performed. A tabular and accompanying narrative summary of the information will present extracted evidence aligned to the review's objective and questions.

Student-designed games in secondary education. Effects and perspectives from students and teachers

The goal was to gain a deeper understanding of the extended use of student-designed games. 207 students (grades: eight, nine, eleven) from one school participated. They were randomly divided in Experimental (student-designed games) and Equivalent group (traditional instruction). Both experienced the same learning units (two, 12 sessions) over the same time (six weeks). The study followed a pretest, post-test, quantitative-qualitative research design. Data was obtained through questionnaire, diary and open-ended question. Quantitative results showed statistically significant differences at post-test in Autonomy and Important role favoring the Experimental group. Students’ qualitative data produced positive: student empowerment, innovation, fun and learning, and negative themes: lack of flow, boring and no democracy. From the teacher’s diary also emerged positive: student empowerment and increased participation and negative themes: lack of flow. Student-designed games can empower students, increasing their autonomy and important role, but they also have limitations.

MODELING OF TECHNOLOGICAL PROCESSES FOR ALGORITHMIZATION OF PROBLEM OF MANAGEMENT OF OIL FIELD TREATMENT FACILITIES

This article presents mathematical models and calculations of balances of technological processes used for the purposes of design and synthesis of process control algorithms in installations of oil field preparation. Representation of the process in the form of characteristic flow graph and adjacency matrix allows to demonstrate and simplify the calculation of material and thermal balances of multistage technological process. The comparison of the results of calculation of material balance obtained using a specialized modeling system and the equations of the main processes of oil preparation with the experimental data of the current installation is given on the example of the installation of preliminary discharge of formation water. The main reason for the high error of the results is the lack of flow and efficiency of the demulsifier in the models of calculation. The mathematical model of calculation of function of water cut at an exit from installation as the main indicator of quality of preparation of oil is developed. A function of water content was approximated by a second order equation and dependent variable controlling variables – the temperature, rate of the demulsifier and the residence time of the liquid in the apparatus. The flow rate and water content of the liquid is determined by the oil field and does not apply to variable control variables. According to the developed mathematical model, graphs of the dependence of water content on the norm of the demulsifier, the residence time of the liquid in the apparatus and temperature are constructed. The comparison of the results showed an adequate degree of comparability of the regime parameters obtained by the model with the experimental data of the current installation. The practical significance of the work lies in the preparation of recommendations on the parameters of the process, transmitted as input data for design and control system as tasks to operators and automatic controllers.