Cycle Step Research Articles

Study on reservoir heterogeneity of Chang 8 reservoir in Hongde Oilfield, western margin of Ordos Basin and knowledge of fine stratification development practice

Abstract In view of the problems of reservoir heterogeneity and unclear understanding of main control factors in Chang8 reservoir of Hongde Oilfield in the middle part of Tianhuan, Ordos Basin, efficient development and stable production are restricted by a large number of drilling, core data and log comparative analysis, using core observation, microscopic rock slice identification, scanning electron microscopy, mercury injection and phase infiltration experiments, etc. Based on the understanding of sedimentary facies and diagenesis, the quantitative analysis of Chang 8 in the study area is carried out from the macro intra-layer, interlayer, plane heterogeneity and microscopic heterogeneity. Finally, it is concluded that Chang 8 reservoir in Hongde Oilfield presents strong heterogeneity, and sedimentary microfacies, different clastic components of sandstone, diagenesis and other main factors affecting its strong heterogeneity. At the same time, in the development practice of De 5 area of Hongde Oilfield, the multi-stage sedimentary cycle division and step production and development were taken as a breakthrough, and the differential reservoir seepage theory was innovatively used to reduce the section/plane contradiction caused by reservoir heterogeneity, and a technical system such as regional fine stratified production, differentiated reservoir fracturing and reconstruction, single sand body fine injection and production control and stratified water injection was formed. The high efficiency development and utilization of strong heterogeneous reservoir is realized.

Patient safety in orthodontic care: a scoping literature review with proposal for terminology and future research agenda

BackgroundKnowledge about patient safety in orthodontics is scarce. Lack of standardisation and a common terminology hinders research and limits our understanding of the discipline. This study aims to 1) summarise current knowledge about patient safety incidents (PSI) in orthodontic care by conducting a systematic literature search, 2) propose a new standardisation of PSI terminology and 3) propose a future research agenda on patient safety in the field of orthodontics.MethodsA systematic literature search was performed in the main online sources of PubMed, Web of Science, Scopus and OpenGrey from their inception to 1 July 2023. Inclusion criteria were based on the World Health Organization´s (WHO) research cycle on patient safety. Studies providing information about the cycle’s steps related to orthodontics were included. Study selection and data extraction were performed by two of the authors.ResultsA total of 3,923 articles were retrieved. After review of titles and abstracts, 41 articles were selected for full-text review and 25 articles were eligible for inclusion. Seven provided information on the WHO’s research cycle step 1 (“measuring harm”), twenty-one on “understanding causes” (step 2) and twelve on “identifying solutions” (step 3). No study provided information on Steps 4 and 5 (“evaluating impact” or “translating evidence into safer care”).ConclusionCurrent evidence on patient safety in orthodontics is scarce due to a lack of standardised reporting and probably also under-reporting of PSIs. Current literature on orthodontic patient safety deals primarily with “measuring harms” and “understanding causes of patient safety”, whereas less attention has been devoted to initiatives “identifying solutions”, “evaluating impact” and “translating evidence into safer care”. The present project holds a proposal for a new categorisation, terminology and future research agenda that may serve as a framework to support future research and clinical initiatives to improve patient safety in orthodontic care.RegistrationPROSPERO (CRD42022371982).

A Step Test to Evaluate the Susceptibility to Severe High-Altitude Illness in Field Conditions.

Hermand, Eric, Léo Lesaint, Laura Denis, Jean-Paul Richalet, and François J. Lhuissier. A step test to evaluate the susceptibility to severe high-altitude illness in field conditions. High Alt Med Biol. 25:158-163, 2024.-A laboratory-based hypoxic exercise test, performed on a cycle ergometer, can be used to predict susceptibility to severe high-altitude illness (SHAI) through the calculation of a clinicophysiological SHAI score. Our objective was to design a field-condition test and compare its derived SHAI score and various physiological parameters, such as peripheral oxygen saturation (SpO2), and cardiac and ventilatory responses to hypoxia during exercise (HCRe and HVRe, respectively), to the laboratory test. A group of 43 healthy subjects (15 females and 28 males), with no prior experience at high altitude, performed a hypoxic cycle ergometer test (simulated altitude of 4,800 m) and step tests (20 cm high step) at 3,000, 4,000, and 4,800 m simulated altitudes. According to tested altitudes, differences were observed in O2 desaturation, heart rate, and minute ventilation (p < 0.001), whereas the computed HCRe and HVRe were not different (p = 0.075 and p = 0.203, respectively). From the linear relationships between the step test and SHAI scores, we defined a risk zone, allowing us to evaluate the risk of developing SHAI and take adequate preventive measures in field conditions, from the calculated step test score for the given altitude. The predictive value of this new field test remains to be validated in real high-altitude conditions.

Quantification of GTPase Cycling Rates of GTPases and GTPase:Effector Mixtures Using GTPase Glo Assays.

In different cellular activities such as signal transduction, cell division, and intracellular transportation, small guanosine triphosphatases (GTPases) take on a vital role. Their function involves hydrolysis of guanosine triphosphate (GTP) to guanosine diphosphate (GDP). In this article, we explain the application of a commercially available GTPase assay-the GTPase Glo assay by Promega-for investigation of GTPase-effector interactions. We provide experimental protocols together with an analysis model and software to obtain GTPase cycling rates of GTPases and GTPase:effector mixtures. GTPase cycling rates refer to the rates by which a GTPase completes an entire GTPase cycle. These rates enable quantification of the strength of GTPase effectors in a concentration-dependent fashion, as well as quantification of the combined effect of two effectors, independent of which GTPase cycle step they are affecting. © 2024 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol: Conducting GTPase Glo assays Support Protocol 1: Analyzing GTPase assays to correlate luminescence with remaining GTP Support Protocol 2: Fitting GTPase assay data to obtain GTPase cycling rates.

Reproducibility of heart rate recovery measures across differing modalities and intensities of submaximal exercise in healthy volunteers: A healthy volunteer study

PurposeSubmaximal exercise tests (SET) are an easier to conduct and less physically demanding alternative to cardiopulmonary exercise testing for assessment of pre-operative fitness. Assessment of heart rate recovery (HRR) following SETs offers an easily obtained marker of vagal reactivation and sympathetic withdrawal and therefore provides an indication of an individual’s fitness. This study sought to assess the reproducibility of HRR across different workloads and modalities of SET.MethodsThirty-four healthy volunteers were recruited to undergo two SETs at 40% and 60% of their predicted maximal workload. A second group of thirty-one healthy volunteers were recruited to undergo three SETs of differing modalities; Cycle ergometry, Step and Shuttle Walk tests. HRR was quantified using the conventional indices HRR1 and HRR2 (calculated as heart rate (HR) on exercise cessation minus HR at 1 and 2 min of rest) and a novel area under the HRR vs. time curve (HRRAUC) method. Reproducibility of results was assessed using intra-class correlation coefficient (ICC) and limits of agreements.ResultsThe results showed that HRR1 and HRR2 were poorly reproducible across differing workloads and exercise modalities (ICC < 0.45 for all comparisons) whereas HRRAUC proved to be at least moderately reproducible (ICC > 0.52 for all comparisons).ConclusionsThese results suggest that HRRAUC may be a superior way of quantifying HRR following SETs, adding objectivity to SET results. Quantifying HRRAUC could prove to have useful clinical applications for pre-operative risk assessment, assessing fitness to undergo treatment and monitoring disease progression.

On fatigue crack origin with a fine granular area in matrix without defect

Fatigue crack initiation in metallic materials during very high cycle fatigue has been characterized by a subsurface crack origin with defect such as an inclusion. In this paper, fatigue damage behavior in an austenitic stainless steel has been studied using a novel progressive stepwise load increasing test method with each cycle step higher than 108 cycles. Subsurface crack origin with a fine granular area has formed in the matrix without defect. This is a new phenomenon. The mechanism has been investigated using Focused Ion Beam cross-sectioning and electron channeling contrast imaging techniques. Strain localization, grain fragmentation and local plasticity exhaustion are the main factors that cause fatigue damage and crack initiation in the matrix. This study provides a fundamental understanding how material damage and crack initiation occur in material matrix during very high cycle fatigue.

Assessment of Outcomes of Consolidation Therapy By Number of Cycles of Blinatumomab Received in Newly Diagnosed Measurable Residual Disease Negative Patients with B-Lineage Acute Lymphoblastic Leukemia: In the ECOG-ACRIN E1910 Randomized Phase III National Clinical Trials Network Trial

Introduction: ECOG ACRIN E1910 is a randomized phase III trial that showed that adults with newly diagnosed BCR::ABL1 negative acute lymphoblastic leukemia (ALL) who become MRD negative (&amp;lt;0.01%) after induction chemo who receive blinatumomab with conventional chemotherapy (chemo) have improved survival compared with those who received chemo only (Litzow et al, Blood (2022) 140: Supplement 2, LBA-1). However, not all pts were able to receive all four planned cycles of blinatumomab in consolidation. In this report we assessed outcomes of pts in the blinatumomab arm of the trial who received all 4 cycles of blinatumomab compared to those who received 1-2 cycles. Methods: Patient between the ages of 30 and 70 with newly diagnosed BCR::ABL1 negative B-lineage ALL were enrolled and initially received 2.5 months of combination induction chemo utilizing a BFM-like regimen adapted from the E2993/UKALLXII clinical trial, with pegaspargase (after induction only for patients &amp;gt;=55 years of age) and addition of rituximab for CD20 positive patients. After remission induction (step 1) pts in morphologic complete remission (CR/CRi) received an intensification course of high dose methotrexate with pegaspargase for CNS prophylaxis (step 2). At the conclusion of step 2, remission and MRD status were determined centrally by 6-color flow cytometry with MRD negativity defined as &amp;lt;0.01%. In the primary analysis subset, MRD negative patients were randomized to receive an additional 4cycles of consolidation chemo or 2 cycles of blinatumomab at 28 mcg/day (flat dose) for 28 days each cycle followed by 3 cycles of consolidation chemo, another 4-week cycle of blinatumomab (3rd cycle of blinatumomab) followed by an additional cycle of chemo and then a 4th cycle of blinatumomab (step 3). Following completion of consolidation chemo +/- blinatumomab, pts were given 2.5 years of POMP maintenance therapy timed from the start of the intensification cycle (step 4). Estimates of OS were calculated using the Kaplan-Meier method. Comparison of OS between treatment arms were conducted using the stratified log-rank test and Cox proportional-hazards model with age, CD20 status, rituximab use, and whether pts intend to receive HSCT or not as stratification factors. As the number of cycles needed to optimize outcome has not been studied, an unplanned landmark analysis was used to compare OS of pts in the blinatumomab arm who received all 4 cycles o those who received 1-2 cycles. Time 0 was chosen as 9 months post step 3 randomization (the time that patients were supposed to complete 4 cycles of blina). Four pts who received blinatumomab but died within 9 months post step 3 randomization were therefore excluded from this analysis. Results: The study was activated on December 17, 2013 and closed to enrollment on October 15, 2019. 772 pts were screened for the trial and 488 were enrolled on step 1 induction therapy. The median age of the pts was 51 years (range 30-70). 224 MRD negative pts were randomized, 112 pts to each arm. In the blinatumomab arm 12 pts received 1 cycle (11%), 32 pts received 2 cycles (29%), 4 pts received 3 cycles (4%) and 63 pts received 4 cycles (57%). The OS of pts who received 1-2 cycles of blinatumomab was compared to control (Figure 1) The difference was not significant (hazard ratio 0.62, 95% CI 0.28 to 1.34, p=0.22). Fig 2 compares the survival of those who received 1-2 cycles to those who received 4 cycles ( (HR: 0.39, 95% CI 0.12 to 1.16, p=0.076). Conclusion: The addition of blinatumomab to consolidation chemotherapy resulted in a significantly better overall survival compared to chemotherapy alone in pts with newly diagnosed B-lineage ALL who were MRD negative after intensification. This represents a new standard of care for pts aged 30-70 years with BCR::ABL1 negative ALL. The optimal dose and number of cycles is however unknown. In this unplanned subgroup analysis we demonstrate that a survival benefit can only be confirmed in patients who receive the intended 4 cycles of blinatumomab during consolidation. Further studies will be needed to determine if fewer cycles can provide a similar benefit.

A study on fatigue damage and crack initiation in austenitic steel matrix during very high cycle fatigue

Fatigue damage and crack initiation behavior has been studied in an austenitic stainless steel using a novel progressive stepwise load increasing method with a cycle step greater than 108 cycles and investigated with a FIB-SEM. Subsurface crack origin with a fine granular area in the matrix was formed. Heterogeneous plastic deformation causes strain localization and grain fragmentation. Localized plasticity exhaustion induces crack initiation. A crack origin is completed once a short crack reaches the stress intensity factor threshold for stage II crack propagation. This study provides a fundamental discussion how damage and crack initiation in matrix occur during very high cycle fatigue.

Freezing of Gait in Parkinson's Disease: Implications for Dual-Task Walking.

The simultaneous completion of multiple tasks (dual-tasking, DT) often leads to poorer task performance (DT cost, DTC). People with Parkinson's disease (PwPD) exhibit difficulty with DT, and DTC may be particularly pronounced in PwPD with freezing of gait (FOG). This study assessed the relationship between FOG status and DTC during gait. Gait parameters were collected using inertial sensors in 106 PwPD (off-medication), including definite-freezers (dFOG; n = 25), possible-freezers (pFOG; n = 16), and non-freezers (nFOG; n = 65) during single (ST)-and DT walking. PwPD with dFOG had larger (worse) DTC than nFOG for foot-strike angle, stride length, toe-off angle, variability of foot-strike angle, and arm range of motion (ROM). After accounting for covariates, DTC for toe-off angle and stride length remained worse in PwPD who freeze. Worse cognition predicted larger DTC for stride length, gait cycle duration, gait speed, and step duration across groups. Men had larger DTC compared to women for gait speed, variability in foot-strike angle, stride length, and arm ROM. Increased variability in gait speed DTC was associated with increased disease severity. These findings provide additional support that PwPD who freeze may rely on greater cortical control for the execution of specific gait metrics. The results also underscore the importance of considering cognition when assessing DT ability in PwPD.

Neurophysiological and gait outcomes during a dual-task gait assessment in concussed adolescents

BackgroundGait deficits are common after concussion in adolescents. However, the neurophysiological underpinnings of these gait deficiencies are currently unknown. Thus, the goal of this study was to compare spatiotemporal gait metrics, prefrontal cortical activation, and neural efficiency between concussed adolescents several weeks from injury and uninjured adolescents during a dual-task gait assessment. MethodsFifteen concussed (mean age[SD]: 17.4[0.6], 13 female, days since injury: 26.3[9.9]) and 17 uninjured adolescents (18.0[0.7], 10 female) completed a gait assessment with three conditions repeated thrice: single-task walking, single-task subtraction, and dual-task, which involved walking while completing a subtraction task simultaneously. Gait metrics were measured using an inertial sensor system. Prefrontal cortical activation was captured via functional near-infrared spectroscopy. Neural efficiency was calculated by relating gait metrics to prefrontal cortical activity. Differences between groups and conditions were examined, with corrections for multiple comparisons. FindingsThere were no significant differences in gait metrics between groups. Compared to uninjured adolescents, concussed adolescents displayed significantly greater prefrontal cortical activation during the single-task subtraction (P = 0.01) and dual-task (P = 0.01) conditions with lower neural efficiency based on cadence (P = 0.02), gait cycle duration (P = 0.03), step duration (P = 0.03), and gait speed (P = 0.04) during the dual-task condition. InterpretationOur findings suggest that several weeks after injury concussed adolescents demonstrate lower neural efficiency and display a cost to gait performance when cognitive demand is high, e.g., while multitasking, suggesting that the concussed adolescent brain is less able to compensate when attention is divided between two concurrent tasks.

Interplay between Anodizing Parameters and Corrosion Resistance of Aluminum-Silicon Alloys

Aluminum alloys are widely used in the automotive, aerospace and construction fields due to their excellent physico-mechanical properties. Nevertheless, the corrosion resistance of bare Al alloys is often insufficient to meet the requirements of several industrial applications and protection strategies are needed. Among these, anodizing is particularly effective since it can lead to the formation of a compact and thick dielectric oxide layer with barrier and corrosion protection capabilities.However, anodizing of highly alloyed Aluminum alloys (e.g. those with an alloy element concentration higher than 5%wt) can be particularly challenging due to the presence of intermetallic precipitates within the Al matrix which generates micro-galvanic coupling events with an associated thickness inhomogeneity of the obtained anodic layer [1].In this context, the work investigates ten new current waveforms for anodizing of Aluminum Silicon alloys (AlSix). Particular attention is devoted to the interplay among waveform parameters (e.g. duty cycle, peak and rest step intensities), oxide layer morphology and corrosion resistance. In particular, metallography, voltammetry and contact angle methods are used in order to correlate different figures of merit with the anodic layer morphological features.It is concluded that a careful optimization of the current waveform parameters can modulate the: a) corrosion current; b) corrosion potential; c) breakdown potential; and d) polarization resistance; of coated specimens. In conclusion, the most effective waveforms are identified and coated Aluminum alloy specimens with a remarkable corrosion resistance are obtained.[1] M Bandiera, A Bonfanti, M Bestetti, F Bertasi, SAE International Journal of Advances and Current Practices in Mobility 3 (2), 973-979.

Crack Initiation in Bulk Matrix of Austenitic Stainless Steel during Very High Cycle Fatigue

Abstract In the very high cycle fatigue regime, fatigue crack initiation in high-strength steels is usually correlated to a subsurface inclusion with a fine granular area (FGA). Localized stress–strain concentration at the subsurface inclusion is a critical factor. Fatigue crack initiation with an FGA in the bulk matrix without any defect has rarely been reported. In this paper, a fundamental study on the formation of FGAs in the bulk matrix of an austenitic stainless steel has been carried out using a progressive stepwise load-increasing test with a cycle step of about 108 cycles. FGA formation in the subsurface bulk matrix has been observed. The microstructural damage in the fatigue-tested specimens has been studied using the electron channeling contrast imaging electron microscopy technique. Strain localization and grain fragmentation are the main processes for the formation of FGAs. Local plasticity exhaustion leads to crack initiation due to local stress concentrations. This method can also be used to predict the fatigue damage process, especially the damage rate in individual specimens.

Numerical study of reasonable cycle step length for longwall topcoal drawing in extra-thick coal seams based on the particle-block element coupling approach

Numerical study of reasonable cycle step length for longwall topcoal drawing in extra-thick coal seams based on the particle-block element coupling approach

Proprioceptive Exercises in Hemiplegia Improve Balance and Spatiotemporal Parameters

Abstract Objective It was planned to investigate the effects of proprioceptive exercises applied to patients with hemiplegia on muscle tone, balance, perception, posture, mobility, and spatiotemporal parameters. Materials and Methods 70 participants with hemiplegia were randomized to an experimental group (conventional stroke rehabilitation program+proprioceptive exercise, 30 sessions) and a control group (conventional stroke rehabilitation program, 30 sessions). Timed Up and Go (TUG) Test, Modified Ashworth Scale (MAS), Posture Assessment Scale for Stroke Patients (PASS), Mini-Mental State Examination (MMSE), Rivermead Mobility Index (RMI), Spatiotemporal parameters (cadence, maximum plantar pressure, total weight transfer, step cycle duration, swing phase, step length and foot angle), and Berg Balance Scale (BERG) were applied on all participants before and after treatment. Results When the intra-group values were compared before and after the treatment, TUG, PASS, MMSE, RMI and BERG values increased significantly. MAS upper extremity and MAS lower extremity values decreased significantly. (p&lt;0.01). In the comparison between the groups, one of the spatiotemporal parameters, cadence, total weight transfer, and maximum plantar pressure values, increased significantly after the treatment. Step cycle duration, swing phase, step length and foot angle values decreased significantly after the treatment. (p&lt;0.01) Conclusion Unlike the literature, proprioceptive exercises that we add to the conventional rehabilitation program can be used to improve muscle tone, balance, perception, postural control, mobility, and spatiotemporal parameters.

Quantum Stirling engine based on dinuclear metal complexes

Low-dimensional metal complexes are versatile materials with tunable physical and chemical properties that make these systems promising platforms for caloric applications. In this context, this work proposes a quantum Stirling cycle based on a dinuclear metal complex as a working substance. The results show that the quantum cycle operational modes can be managed when considering the change in the magnetic coupling of the material and the temperature of the reservoirs. Moreover, magnetic susceptibility can be used to characterize the heat exchanges of each cycle step and, therefore, its performance. As a proof of concept, the efficiency of the heat engine is obtained from experimental susceptibility data. These results open doors for studying quantum thermodynamic cycles by using metal complexes; and further the development of emerging quantum technologies based on these advanced materials.

Development of a compact high-power density air-cooled proton exchange membrane fuel cell stack with ultrathin steel bipolar plates

Air-cooled fuel cells used in portable stacks are required to reduce the size and weight while ensuring a high-power output. In this study, the 0.1 mm stainless steel sheet was used to form the ultrathin bipolar plates (BPs), by the reasonable flow field design and material selection, the mass of single bipolar plate is as low as 44.6 g and the thickness is only 1.9 mm with 180 cm−2 active area. The 2.8 kW air-cooled stack has efficient heat dissipation, small voltage over/undershoot, rapid temperature dynamic response, and compact structure, moreover, the mass of the stack core is 3203 g and the volume of the stack is 3.36 L. The designed stack has an excellent voltage consistency, fast temperature response, and high power density. The maximum voltage overshoot is 0.035 V with a current step/drop of 10 A. The maximum temperature drop rate reaches 0.12 K s−1 in a 10% fan duty cycle step when the load current is 72 A. At 50% fan duty cycle, the temperature increase rate reaches its peak of 0.27 K s−1 when the load current steps from 70 A to 80 A. The mass power density of the designed air-cooled 56-cell stack is 0.885 kW kg−1 and the volumetric power density is 0.751 kW L−1.

Streaming linked data: A survey on life cycle compliance

Data streams are becoming omnipresent on the Web. The Stream Reasoning (SR) paradigm, which combines Stream Processing with Semantic Web techniques, has been successful in processing these data streams. The progress in SR research has led to several applications in domains such as the Internet of Things, social media analysis, Smart Cities, and many others. Each of these applications produces and consumes data streams, however, there are no fixed guidelines on how to manage data streams on the Web, as there are for their static counterparts. More specifically, there is no fixed life cycle for Streaming Linked Data (SLD) yet. Tommasini et al. (2020) introduced an initial proposal for a SLD life cycle, however, it has not been verified if the proposed life cycle captures existing applications and no guidelines were given for each step.In this paper, we survey existing SR applications and identify if the life cycle proposed by Tommasini et al. fully captures the surveyed applications. Based on our analysis, we found that some of the steps needed reordering or being split up. This paper proposes an update of the life cycle and surveys the existing literature for each life cycle step while proposing a number of guidelines and best practices. Compared to the initial proposal by Tommasini et al., we drill down into the details of the processing step which was previously neglected. The updated life cycle and guidelines serves as a blueprint for future SR applications. A life cycle for SLD that allows to efficiently manage data streams on the web, brings us a step closer to the realization of the SR vision.

Does Kinesiophobia Affect Spatiotemporal Parameters in Patients with Ankylosing Spondylitis?

Abstract Aim We aimed to examine the effect of kinesiophobia on functional capacity, disease activity, quality of life and spatiotemporal parameters of patients with AS by comparing AS patients with healthy controls. Material and method Our study included 46 patients with ankylosing spondylitis (AS) and 45 healthy controls (HC). Bath Ankylosing Spondylitis Metrology Index (BASMI), Bath Ankylosing Spondylitis Functional Index (BASFI), Ankylosing Spondylitis Quality of Life Scale (ASQoL), Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Tampa Kinesiophobia Scale (TKS) scores, Timed Up and Go (TUG) test, maximum plantar pressure and spatiotemporal parameters (total weight transfer, step cycle duration, double-support phase, swing phase, step length, foot angle and cadence) were evaluated. Results Ninety-one individuals (46 AS, 45 HC) (age/sex/BMI) were included in our study. Statistically significant differences were seen between AS and HC groups in TUG, cadence, TKS, maximum pressure, step cycle duration, swing phase, step length, double-support phase, and foot angle measurements (p&lt;0.05). Significant positive correlations existed between TKS and BASMI, BASDAI, BASFI, ASoQ, TUG and foot angle (p&lt;0.05) in AS. Substantial negative correlations were found between TKS and maximum pressure, cadence and swing phase values (p&lt;0.05) in AS. Conclusion Our study is the first in the literature to measure spatiotemporal parameters between patients with AS and HC and evaluate their relationship with kinesiophobia, which was done to the best of our knowledge. We found that patients with AS changed their gait phases by developing a unique pattern and created a more cautious and safe gait model to provide balance and stability. Our study revealed a statistically significant relationship between kinesiophobia and disease activity, functional status, quality of life, cadence, maximum plantar pressure, swing phase, and foot angle. The detailed data we obtained in our study will shed light on gait analysis and research on kinesiophobia in patients with AS. Kinesiophobia should be evaluated in routine gait rehabilitation protocols applied to individuals with AS, and treatment protocols for kinesiophobia should be added if necessary.

Efforts To Prevent Stunting In Children In Sooko Village Wringinanom Gresik

The community empowerment carried out related to efforts to prevent stunting is increasing with health services for ENT, Dental examinations and the provision of nutritional packages in Sooko Village, Gresik Wringinanom with the aim that children receive adequate health and nutrition services. So that the development of children can be according to their stages and the stunting rate will decrease even more in Sooko Village, Wringinanom Gresik. The empowerment steps that will be carried out in Sooko Village, Wringinanom District, Gresik Regency are steps that are in accordance with the ABCD method. The ABCD-based approach is a philosophy of positive change with a 5-D cycle step approach. As a result of this empowerment activity, children receive treatment related to health problems. The impact after this empowerment was carried out was that the children's health had received good service through administering medicines according to the examination, obtaining nutritional packages to ensure the growth and development of children in Sooko Village

A boost converter‐based MPPT steady‐state oscillation‐free fast tracking control strategy for photovoltaic power systems

With the conventional perturbation and observation (P&O) method, photovoltaic (PV) converters have long maximum power point (MPP) tracking times and three-point oscillations at the steady state that can lead to output power losses and inefficiencies in grid connections. To overcome these drawbacks, a fast tracking and steady-state-oscillation-free control strategy is proposed. The strategy first stores four random duty cycle values on the basis of the duty cycle variation characteristics of the PV panel power adjustment, then calculates the odd and even duty cycle difference and judges the steady state by varying the duty cycle difference threshold. The strategy next obtains the MPP duty cycle using a median filtering algorithm (MFA) to suppress the steady-state oscillation and improves the tracking speed by resetting the appropriate duty cycle step according to the slope of the PV curve of the PV panel output and the corresponding adaptive coefficients. The proposed algorithm was simulated and experimentally validated under various irradiance conditions, and the results show that the algorithm can improve the PV panel output efficiency compared to both the conventional P&O and the adaptive P&O methods.