Observation Tool Research Articles

Integrate Yolov8 Algorithm For Rupiah Denomination Detection In All-In-One Smart Cane For Visually Impaired

The eyes are crucial tools for human observation and perception, facilitating various tasks in daily life. Individuals, including those with visual impairments or blindness, engage in currency transactions, posing challenges in recognizing notes and preventing mishaps with counterfeit money. Despite government efforts, features like embossing on banknotes have limited effectiveness due to the circulated currency's disheveled condition. Addressing the visually impaired community's needs is imperative. An innovative solution, the "all-in-one smart white cane," integrated with machine learning supports daily activities, enhancing independence for visually impaired individuals. The YOLOv8 algorithm is employed for the precise detection of monetary denominations, subsequently recorded through a camera and seamlessly integrated into a smart cane, resulting in a consolidated device. This device, designed with standout features, excels in detecting Indonesian Rupiah banknote denominations. Detection performance testing, incorporating methods like object rotation, utilized a dataset divided into training (70%), validation (20%), and test (10%) segments. Modifications to contrast and variability rotation are essential in the context of real-time nomination recognition. These adjustments are implemented to ensure accurate and swift identification in dynamic, real-world scenarios. Testing results reveal a 99% average accuracy in recognizing currency note denominations, presenting an effective solution for the visually impaired community.

Analysing the quality of real analysis lectures using a structured observation tool

This paper reports a study investigating the quality of advanced mathematics lectures following three goals. First, we present our conceptualisation and operationalisation concerning the quality of mathematics lectures. Second, we test the reliability of a structured observation tool that is based on the aforementioned conceptualisation. Third, we describe the quality of mathematics lectures based on data collected with the observation tool and illustrate its use. The results show that our observation tool is suitable for collecting data about characteristics of mathematics lectures observed on-site and from video recordings. The analysis of the data shows that our findings are in line with previous research: formal aspects of mathematical statements are presented in verbal and written forms mostly correctly; informal aspects of mathematical statements (such as examples, visual or mental representations) are, if they are presented, usually presented only verbally. Furthermore, students have the opportunity to participate during lectures, but there are seldom presentations of alternative solutions, examples or proofs and only a few opportunities for formative assessment. Finally, we discuss implications for future research.

A78 VALIDITY EVIDENCE FOR OBSERVATIONAL EUS COMPETENCY ASSESSMENT: A SYSTEMATIC REVIEW

Abstract Background Endoscopic ultrasound (EUS) encompasses a range of diagnostic and therapeutic procedures that require technical, cognitive, and non-technical skills. The implementation of competency-based frameworks in endoscopic education has emphasized trainee assessment based on predefined milestones, rather than procedure volume. Observational assessment tools with strong validity evidence are needed to achieve this goal. Aims To systematically identify and evaluate observational competency assessment tools employed in EUS using an established validity framework. The secondary aim is to evaluate the educational utility of assessment tools. Methods We searched three databases (MEDLINE, EMBASE, and Evidence-Based Medicine Reviews) and the grey literature from inception to May 2023. Messick’s unified framework was used to evaluate validity evidence based on content, response process, internal structure, relations to other variables, and consequences. Each domain was scored from 0 to 3 with a maximum score of 15 points. Educational utility was evaluated using the Accreditation Council for Graduate Medical Education Standards considering ease of use, ease of interpretation, resources required, and educational impact. Study quality was assessed using the Medical Education Research Quality Instrument. Results Our search identified 2081 records. We screened 44 full texts and included 5 observational EUS assessment tools from 10 studies. All 5 tools are formative assessments, with 4 employed in clinical settings and one in a simulated setting. All tools use Likert rating scales and are rater-based, with 2 having additional self-assessment components. Validity evidence scores ranged from 3 to 13, with the EUS Assessment Tool (EUSAT), Global Assessment of Performance and Skills in EUS (GAPS-EUS), and The EUS and ERCP Skills Assessment Tool (TEESAT) scoring highest, with 10, 11, and 13 points, respectively. Overall educational utility was high across studies given ease of tool use. The TEESAT had the strongest educational impact considering its influence on credentialing and competence thresholds. Study quality was high overall, with scores ranging from 9.5 to 12 (maximum 13.5 points). Inter-rater agreement for validity evidence and educational utility scoring was substantial (k=0.73, raw agreement 80%) and almost perfect (k=0.92, raw agreement 96%), respectively. Conclusions The EUSAT, GAPS-EUS, and TEESAT demonstrate the strongest validity evidence for observational competency assessment of EUS and are easy to implement in educational settings. Future work should investigate barriers to implementation and evaluate utility of these tools for summative assessment. EUS Observational Competency Assessment Tool Validity Evidence Scores Funding Agencies None

Translation and psychometric validation of the Thai version of TeamSTEPPS® team performance observation tool

ABSTRACT In healthcare, effective communication and teamwork are pivotal in reducing medical errors. Integrating team training into health professions education is crucial. Accurate measurement of team performance during training requires reliable assessment tools. The TeamSTEPPS® Team Performance Observation Tool (TPOT), recently updated by the Agency for Healthcare Research and Quality, serves this purpose. However, it had not been translated and validated for use in Thailand. We aimed to translate and assess the psychometric properties of the Thai version of TPOT. Employing a back-translation process, TPOT was adapted to the Thai context. The resulting Thai TPOT instrument was administered to 518 healthcare professionals who had undergone TeamSTEPPS® training. Participants were asked to evaluate two prerecorded, 7-minute simulated team emergency scenarios using the Thai TPOT instrument. Results exhibited high internal consistency (Cronbach’s alpha = .96) and inter-rater reliability (ICC = .98). Confirmatory factor analysis affirmed the construct validity of the Thai TPOT. These findings establish the Thai TPOT as useful for evaluating teamwork within healthcare teams.

Italian COSMO-SkyMed atlas: R-Index and the percentage of measurability of movement

ABSTRACT SAR (Synthetic Aperture Radar) satellite interferometry is a helpful remote sensing technique for large areas analyses and monitoring, especially where the study area is difficult to access for practical or for legal reasons. As a result, the use of these techniques has significantly increased over the past three decades. Among the available different satellite constellations displaying different spatial and temporal resolutions, COSMO-SkyMed of the Italian Space Agency (ASI) represents a cutting-edge reality. COSMO-SkyMed constellation, launched in 2007 by ASI, is a valuable Earth observation tool that provides all-weather, day-and-night imaging capabilities with high resolution and a short revisit time. In this study, we produced an atlas for the entire Italian peninsula using two parameters (R-Index and Percentage of measurability of movement), in order to evaluate the quality and a-priori applicability of satellite interferometry data collected by the COSMO-SkyMed constellation. The atlas was obtained by means of the implementation of different model builders in the GIS (Geographical Information Systems) environment, providing a semi-automatic way to generate the above-mentioned outputs. The R-Index describes the likelihood of detecting Permanent Scatterers in mountainous areas, while the Percentage of measurability of movement indicates the percentage of real motion that interferometry can detect at a certain point in the analyzed region. A high-detail Digital Terrain Model (DTM) has been used to identify the most suitable areas for satellite interferometry monitoring and studying. The results of our analysis showed that the R-Index and the Percentage of measurability of movement could be used to pre-evaluate the quality of satellite interferometry data collected by the COSMO-SkyMed constellation. This research has important implications for disaster response, environmental monitoring, and scientific research and is one of a few cases in the world in which a unified representation for an entire country is provided.

Making observations: Co‐design of an observation tool for and with maker educators

AbstractIn this paper, we share and reflect on the co‐development of an assessment tool for educators; an observation tool to identify evidence of learning and engagement in a museum and library makerspaces. Through a collaborative and iterative design process with educators, we co‐developed, revised, and refined an observation tool to be used by maker educators, researchers, and evaluators. Through this process, we evolved roles that leveraged the strengths and perspectives of both the researchers and educators involved. We also discuss implications for co‐design as an approach for professional learning of informal educators.

The Delphi of ORACLE: An Expert Consensus Survey for the Development of the Observational Risk Assessment of Contractures (Longitudinal Evaluation)

Objective Despite rising prevalence rates, no standard tool is available to identify individuals at risk of developing contractures. This study aimed to gain expert consensus on items for the development of the Observational Risk Assessment Tool for Contractures: Longitudinal Evaluation (ORACLE) for care home residents. Design A two-round, online modified Delphi study. Participants Panellists were qualified healthcare professionals with a background in physiotherapy, occupational therapy, nursing, and rehabilitation medicine. Main outcome measures In the first round, the experts were asked to rate the predesigned list of items on a Likert scale while in the second round, consensus was sought in the areas of disagreement identified in the previous round. Results The two rounds of the Delphi survey included 30 and 25 panellists, respectively. The average clinical and academic experience of the panellists was 22.2 years and 10.5 years, respectively. The panel demonstrated a high level of consensus regarding the clinical factors (10 out of 15 items); preventive care approaches (9 out of 10 items), and contextual factors (12 out of 13 items) ranging from 70% to 100%. Conclusion This Delphi study determined expert consensus on items to be included in a contracture risk assessment tool (ORACLE). The items were related to factors associated with joint contractures, appropriate preventive care interventions, and potentially relevant contextual factors associated with care home settings. The promise of a risk assessment tool that includes these items has the capacity to reduce the risk of contracture development or progression and to trigger timely and appropriate referrals to help prevent further loss of function and independence.

Karakteristik Rasm dalam Manuskrip Mushḥaf Al-Qur’an KH. Abdul Hamid Chasbullah

One of the Qur'an manuscripts from the 20th century is the written version (mushḥaf) KH. Abdul Hamid Chasbullah. The mushḥaf is evidence of the historical heritage of the ulama of Nusantara who have special attention in the field of copying the Qur'an manuscripts. In this study, the author will examine the general description of the mushḥaf and the characteristics of the rasm by referring to the rules of Sheikh Jalal Al-din Al-Suyuthi in the book Al-Itqan fi Ulum Qur'an. The method that the author uses is qualitative research that leads to library research, by using observation tools, interviews, and documentation of the manuscript. The findings of this study are first, this mushḥaf is kept intact (not scattered) although some sheets have been lost and eaten by termites. This 32.3 x 21 x 7.5(cm) mushḥaf was written for the personal use of the copyist. It can be seen that there aren’t illustration and illumination aspects. Second, from the analysis of surah Al-Baqarah juz 2, the copying of this mushḥaf still adheres to the basics of mixed rules between the rasm utsmani and imla'i. Likewise, in terms of qira'at, this mushḥaf mostly uses the history of Imam Hafs 'an Ashim, but some words use mixed history.

VaDAR: Varstrometry for Dual AGN Using Radio Interferometry

Binary and dual active galactic nuclei (AGNs) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes. An entirely new method for identifying possible AGN pairs makes use of the exquisite positional accuracy of Gaia to detect astrometrically variable quasars, in tandem with the high spatial resolution of the Karl G. Jansky Very Large Array (VLA). We present a new pilot study of radio observations of 18 quasars (0.8 ≤ z ≤ 2.9), selected from the Sloan Digital Sky Survey DR16Q and matched with the Gaia DR3. All 18 targets are identified by their excess astrometric noise in Gaia. We targeted these 18 quasars with the VLA at 2–4 GHz (S band) and 8–12 GHz (X band), providing resolutions of 0.″65 and 0.″2, respectively, in order to constrain the origin of this variability. We combine these data with ancillary radio survey data and perform radio spectral modeling. The new observations are used to constrain the driver of the excess astrometric noise. We find that ∼44% of the target sample is likely to be either candidate dual AGN or gravitationally lensed quasars. Ultimately, we use this new strategy to help identify and understand this sample of astrometrically variable quasars, demonstrating the potential of this method for systematically identifying kiloparsec-scale dual quasars.

The affordances of a mobile video-tagging tool for evaluating presentation skills in a second language

ABSTRACT This study investigated the affordances of a mobile video observation and tagging tool used to evaluate presentation skills in English language classrooms. The data consists of 35 video-recorded presentations in a higher education setting. Using a digital evaluation grid, the students received feedback based on visual analytics generated by the mobile app. The students then were asked to reflect on their performances, and were also asked to comment on the affordances and limitations of the method and the tool. Qualitative data that came from (1) students’ written self-evaluations and reflections and (2) their reported perceptions of the affordances of the tool were analyzed using the Constant Comparison Method. Analyses of reflective writings indicated the dominance of negative self-evaluations of language use, while affective factors were also a strong theme. The video-tagging tool was found to be very beneficial by the learners, mainly in enabling them to notice their strengths and weaknesses in presenting in English and facilitating effective feedback. The results show that this data-led reflective presentation model can be beneficial for learners as they can identify points of development.

Early childhood science practices observation tool (EC-SPOT): assessing science practices across multiple classroom contexts

ABSTRACT Worldwide, there is growing recognition of the importance of science in early childhood education. Doing science’ or, more formally, science and engineering practices, is acknowledged as a critical component of early science education that requires support from the adults in children’s lives. Moreover, engaging in science practices helps build the foundations for active learning, problem-solving, and school readiness. Despite increased efforts to increase science in preschool classrooms the dearth of measurement tools restricts the ability of researchers to evaluate the efficacy of these efforts. This paper evaluates a new measure to assess preschool teachers’ science and engineering practices across multiple classroom contexts throughout the day. Data from 58 preschool teachers and 360 children demonstrate the reliability of the EC-SPOT in capturing teachers’ practices and validity evidence in relation to an external measure of children’s science knowledge as well as the sensitivity to intervention effects. The EC-SPOT critically expands the ability to capture science learning beyond typically limited formal science lessons, as it unfolds naturally and often in preschool children’s everyday classroom experiences. Both for evaluating and promoting higher quality science education in preschool programmes, the field needs better ways of capturing how adults recognise and encourage young children behaving as scientists.

Teaching for all? Measuring the quality of inclusive practices across eight countries

ABSTRACT While consensus exists on the importance of inclusive education, there is limited evidence on the use and quality of inclusive teaching practices and the extent to which these are related to effective teaching more generally. This article uses the Universal Design for Learning Framework and Teach observation tool to examine use of inclusive teaching practices across eight countries and their relationship to other teaching quality behaviours. Through analysis of data from 5348 classroom observations, findings revealed that while teachers spent over 87% of class-time on task, most did not implement high-quality inclusive practices. Teachers also demonstrate similar strengths and weaknesses in inclusive teaching across countries. Additionally, teachers who demonstrate quality inclusive teaching practices are more likely to demonstrate better teaching in other areas. Finally, this study provides evidence that while inclusive teaching is related to effective teaching more generally, distinctions exist between these constructs which warrant separate consideration amongst educators.

Prevalence of Delirium After Abdominal Surgery and Association With Ketamine: A Retrospective, Propensity-Matched Cohort Study.

Delirium is a common postoperative complication for older patients in the ICU. Ketamine, used primarily as an analgesic, has been thought to prevent delirium. Determine the prevalence and association of delirium with low-dose ketamine use in ICU patients after abdominal surgery. Single-center, retrospective, propensity-matched cohort study. Eight hospital academic medical center. Cohort comprising 1836 patients admitted to the ICU after abdominal surgery between June 23, 2018 and September 1, 2022. Propensity score matching (PSM) with a 3:1 ratio between no-ketamine use and ketamine use was performed through a greedy algorithm (caliper of 0.005). Outcomes of interest included: delirium (assessed by Confusion Assessment Method-ICU), mean pain score (Numeric Pain Scale or Critical Care Pain Observation Tool score as available), mean opioid consumption (morphine milligram equivalents), length of stay (d), and mortality. Prevalence of delirium was 47.71% (95% CI, 45.41-50.03%) in the cohort. Of 1836 patients, 120 (6.54%) used low-dose ketamine infusion. After PSM, the prevalence of delirium was 56.02% (95% CI, 51.05-60.91%) in all abdominal surgery patients. The ketamine group had 41% less odds of delirium (odds ratio [OR] = 0.59; 95% CI, 0.37-0.94; p = 0.026) than patients with no-ketamine use. Patients with ketamine use had higher mean pain scores (3.57 ± 2.86 vs. 2.21 ± 2.09, p < 0.001). In the subgroup analysis, patients in the ketamine-use group 60 years old or younger had 64% less odds of delirium (OR = 0.36; 95% CI, 0.13-0.95; p = 0.039). The mean pain scores were higher in the ketamine group for patients 60 years old or older. There was no significant difference in mortality and opioid consumption. Low-dose ketamine infusion was associated with lower prevalence of delirium in ICU patients following abdominal surgery. Prospective studies should further evaluate ketamine use and delirium.

UTILIZATION OF CLASSROOM OBSERVATION TOOL AND TEACHERS’ TEACHING PERFORMANCE IN THE NEW NORMAL EDUCATION

This study aimed to find out the teaching performance of teachers through the utilization of Classroom Observation Tool (COT) in Pikong Elementary School. The needed data of this study were gathered using a survey questionnaire on challenges encountered by teachers in the new normal education, and teachers rating in teaching through the use of Classroom Observation Tool (COT) as basis in formulating technical assistance plan. Generally, challenges encountered by teachers in teaching obtained a weighted mean of 4.06, described as agree. Moreover, teachers teaching performance got the average score of 5.33, described as satisfactory. This means that the teachers in Pikong Elementary School demonstrate a range of associated pedagogical aspects of the indicator that usually are aligned with the learners developmental needs. However, teachers have to be provided with different technical assistance to increase their teaching performance from satisfactory to outstanding level. KEYWORDS: Classroom Observation Tool; Teaching Performance, Challenges

Internal carbon recycling by heterotrophic prokaryotes compensates for mismatches between phytoplankton production and heterotrophic consumption.

Molecular observational tools are useful for characterizing the composition and genetic endowment of microbial communities but cannot measure fluxes, which are critical for the understanding of ecosystems. To overcome these limitations, we used a mechanistic inference approach to estimate dissolved organic carbon (DOC) production and consumption by phytoplankton operational taxonomic units and heterotrophic prokaryotic amplicon sequence variants and inferred carbon fluxes between members of this microbial community from Western English Channel time-series data. Our analyses focused on phytoplankton spring and summer blooms, as well as bacteria summer blooms. In spring blooms, phytoplankton DOC production exceeds heterotrophic prokaryotic consumption, but in bacterial summer blooms heterotrophic prokaryotes consume three times more DOC than produced by the phytoplankton. This mismatch is compensated by heterotrophic prokaryotic DOC release by death, presumably from viral lysis. In both types of summer blooms, large amounts of the DOC liberated by heterotrophic prokaryotes are reused through internal recycling, with fluxes between different heterotrophic prokaryotes being at the same level as those between phytoplankton and heterotrophic prokaryotes. In context, internal recycling accounts for approximately 75% and 30% of the estimated net primary production (0.16 vs 0.22 and 0.08 vs 0.29μmoll-1 d-1) in bacteria and phytoplankton summer blooms, respectively, and thus represents a major component of the Western English Channel carbon cycle. We have concluded that internal recycling compensates for mismatches between phytoplankton DOC production and heterotrophic prokaryotic consumption, and we encourage future analyses on aquatic carbon cycles to investigate fluxes between heterotrophic prokaryotes, specifically internal recycling.

POZOROVACÍ A DIAGNOSTICKÝ NÁSTROJ PRO ZJIŠŤOVÁNÍ ÚROVNĚ A PODOBY FORMATIVNÍHO HODNOCENÍ V ČESKÝCH ŠKOLÁCH

OBSERVATIONAL AND DIAGNOSTIC TOOL FOR DETERMINING THE LEVEL AND FORM OF FORMATIVE ASSESSMENT IN CZECH SCHOOLS The aim of this article is to summarize existing tools for measuring formative assessment and create a new diagnostic and observational tool suitable for the educational reality of Czech primary and lower secondary schools (especially at the lower secondary schools and relevant years of multi-year general secondary schools). This tool allows capturing and analyzing the form and level of formative assessment practices among teachers in the classroom. The developed tool will be used to identify the level and form of formative assessment among teachers who seek to implement strategies of formative assessment in their practice. It also helps to identify their strengths and areas where improvement is needed. The tool can be utilized by other researchers, educational stakeholders, or schools themselves.

The Role of Learning Resource Centres in Enhancing Self-Learning of Senior Secondary Students

The School Learning Resource Centre is staple of the co-curricular activities and a way to encourage self-learning of students which makes the best contribution to stimulate the interest of students in general knowledge development and knowledge seeking. Learning resource centres play a major role in making students use their free time and improve their reading habits. Through this, students’ curricular and co-curricular activities are improved. However, in recent times, it has been pointed out that the number of students visiting learning resource centres and using the learning resources there is decreasing. This situation has had a negative impact on their academic achievement. It is in this background that the research has been carried out regarding the role of learning resource centres in enhancing the self-learning of students in Akkaraipattu education division. Among the activities undertaken through the learning resource centre to promote self-learning of students. The objectives of this research are to identify the contributions made directly. The objectives of this research are to identify the contributions made by the subject teachers and the contributions made by the school management and to analyze the relationship between these contributions and the self-learning of the students and to identify the challenges in effectively carrying out the activities of the learning resource centre to enhance the self-learning of the students. This research has also been carried out in the design of a descriptive survey research under the mixed research approach and 5 schools in the Akkaraipattu education division have been selected and their learning resource centre in-charges, subject teachers, school management committee members were taken as the population of the research and 60 people were selected samples using purposive sampling method. Quantitative and qualitative data collected through questionnaire, interview and observation tools have been analyzed using percentage survey and correlation coefficient. The following have been identified through this. The contribution of the learning resource Centre and the contribution of the school management in enhancing the self-learning of the students are at a high level. However, the contribution of subject teachers is at a low level. Meanwhile, there is a low positive correlation between learning research centre subject teachers’ contributions and students’ achievement. On the contrary, there is a high positive correlation between the contributions of school management and student achievement. Therefore, the contribution of the teachers who have the most influence in enhancing the self-learning of the students is less and it has had a less impact on the achievement of the students. Similarly, although the direct contribution of the learning resource Centre, which is highly influential in enhancing self-learning of students have been high, it has had a low impact on student achievement. Therefore, learning resource centre in-charges, subject teachers, school management and other school community should work together to carry out proper planning and effectively carry out the activities of the learning resource centre in a manner is suitable for implementing a blended learning approach can enhance self – learning of students.

Prevalence of Risk Factors Associated with Placental Malaria in Observational Study in Kator Primary Health Center South Sudan

Introduction: Civil unrest, public health system fragility and community mass relocation had played major roles in development of Placental Malaria Parasitization. This study aimed to measure and identifies risk factors associated with placental malaria infections in Kator primary health center. Methods and Materials: 115 enrolled pregnant women in cross-section survey after signing consent form using observational technique tools in one year period. ABO, peripheral blood antigen detection for malaria parasites using RDT kits and quantitative questionnaire information were obtained at recruitment phase while second peripheral blood for placental malaria parasites species applying RDT, placental weight and baby weight were measured after delivery as phase two. SPSS version 26 was applied with 0.005% P-value and CI 95%. Results: Out of 115 recruited pregnant women only (86.0%) 99 reached delivery room. With 29 primigravidae, 23 secundigravidae and 47 multigravidae; primigravida OR 95%CI 2.4 (1.73-5.64) P-vale 0.00013 and secundigravida with OR 95% CI1.8 (1.23-2.93) P-value 0.00072 and multigravida with OR 95% CI 1.5 (0.91-3.45) P-value 0.83. untreated bed net with OR 95% CI 1.4 (1.12-3.08) P-value 0.00053 and shared bed net at night with OR 95% CI 7.4(5.18-17.32) P-value 0.00027. Low birth weight, low placental weight and blood group O were not associated with placental malaria. Overall Placental Malaria prevalent was 26.3%. Conclusion: in this study, elevated placental malaria was recorded in Kator area of South Sudan. Doubling efforts to reduce placental malaria infections and its adverse clinical complications a new strategy to control the syndromic effects of the disease is required.

Validation of a Mathematics Teaching Assessment Scale for K-12 Basic Education: A Confirmatory Factor Analysis Approach

Mathematics teaching in the K-12 Basic Education Curriculum encourages educators to adopt student-centered approaches and emphasize the development of 21st-century skills. Assessing the pedagogical practices of mathematics teachers using a specific tool validated through quantitative approaches is essential to ensure the effectiveness and quality of mathematics instruction. While previous research has focused on instrument validation in various areas, including self-efficacy of math teachers, mathematics teachers’ anxiety, and online education, existing classroom observation tools have limitations, particularly in assessing public school teachers' performance specifically intended for mathematics teachers. This study aimed to validate a mathematics teaching assessment scale. The scale, constructed based on the Department of Education's classroom observation tool, initially comprised 22 items across four constructs: Mastery of the K-12 Mathematics, Teaching Methodologies, ICT Integration, and Assessment of Learning. The scale was validated through content validation, reliability testing, inter-item correlation, confirmatory factor analysis (CFA), convergent validity, and discriminant validity. A total of 687 mathematics teachers from four public schools in each of the five municipalities of the National Capital Region participated. Content validity was established by eight experts using the Scale Content Validity Index and Item-Content Validity Index, with indices exceeding 0.833, indicating validity. Each construct demonstrated desirable reliability indices based on Cronbach's alpha and composite reliability coefficients. Confirmatory Factor Analysis removed six indicators, resulting in a final scale of 16 items across four constructs. The validated instrument can effectively evaluate mathematics teachers' classroom teaching, focusing on 21st-century skills and student-centered approaches.

Study of hydrodynamic processes in a two-phase layer above a submerged perforated sheet

To study the hydrodynamics of a two-phase flow over a submerged perforated sheet (SPS) and the entrainment of water droplets from the water-air interface, a “Bubbler” installation was built. The main observation tool was video recording of the process followed by data analysis. An SPS with two holes was used. Three experiments were performed with different air flow rates. A general picture of air flow was established: the rise of bubbles in the water volume under the SPS, the formation of an air blanket, air bubbling in the layer of water above the SPS, the formation and jump of water drops upward. For each air flow rate, the size of the bubbles in the two-phase layer and the size of the resulting droplets were determined. It was found that with increasing air flow, these parameters increase.