Fourth Pattern Research Articles

Diurnal timing of physical activity and risk of colorectal cancer in the UK Biobank

BackgroundPhysical activity reduces colorectal cancer risk, yet the diurnal timing of physical activity in colorectal cancer etiology remains unclear.MethodsThis study used 24-h accelerometry time series from UK Biobank participants aged 42 to 79 years to derive circadian physical activity patterns using functional principal component analysis. Multivariable Cox proportional hazard models were used to examine associations with colorectal cancer risk.ResultsAmong 86,252 participants (56% women), 529 colorectal cancer cases occurred during a median 5.3-year follow-up. We identified four physical activity patterns that explained almost 100% of the data variability during the day. A pattern of continuous day-long activity was inversely associated with colorectal cancer risk (hazard ratio (HR) = 0.94, 95% confidence interval (CI) = 0.89–0.99). A second pattern of late-day activity was suggestively inversely related to risk (HR = 0.93, 95% CI = 0.85–1.02). A third pattern of early- plus late-day activity was associated with decreased risk (HR = 0.89, 95% CI = 0.80–0.99). A fourth pattern of mid-day plus night-time activity showed no relation (HR = 1.02, 95% CI = 0.88–1.19). Our results were consistent across various sensitivity analyses, including the restriction to never smokers, the exclusion of the first 2 years of follow-up, and the adjustment for shift work.ConclusionsA pattern of early- plus late-day activity is related to reduced colorectal cancer risk, beyond the benefits of overall activity. Further research is needed to confirm the role of activity timing in colorectal cancer prevention.

The complete chloroplast genome of Rhododendronambiguum and comparative genomics of related species.

Rhododendron Linnaeus, 1753, the largest genus of woody plants in the Northern Hemisphere, includes some of the most significant species in horticulture. Rhododendronambiguum Hemsl, 1911, a member of subsection Triflora Sleumer 1947, exemplifies typical alpine Rhododendron species. The analysis of the complete chloroplast genome of R.ambiguum offers new insights into the evolution of Rhododendron species and enhances the resolution of phylogenetic relationships. This genome is composed of 207,478 base pairs, including a pair of inverted repeats (IRs) of 47,249 bp each, separated by a large single-copy (LSC) region of 110,367 bp and a small single-copy (SSC) region of 2,613 bp. It contains 110 genes: 77 protein-coding genes, 29 tRNAs, four unique rRNAs (4.5S, 5S, 16S, and 23S), with 16 genes duplicated in the IRs. Comparative analyses reveal substantial diversity in the Rhododendron chloroplast genome structures, identifying a fourth variant pattern. Specifically, four highly divergent regions (trnI-rpoB, ndhE-psaC, rpl32-ndhF, rrn16S-trnI) were noted in the intergenic spacers. Additionally, 76 simple sequence repeats were identified. Positive selection signals were detected in four genes (cemA, rps4, rpl16, and rpl14), evidenced by high Ka/Ks ratios. Phylogenetic reconstruction based on two datasets (shared protein-coding genes and complete chloroplast genomes) suggests that R.ambiguum is closely related to R.concinnum Hemsley, 1889. However, the phylogenetic positions of subsection Triflora Pojarkova, 1952 species remain unresolved, indicating that the use of complete chloroplast genomes for phylogenetic research in Rhododendron requires careful consideration. Overall, our findings provide valuable genetic information that will enhance understanding of the evolution, molecular biology, and genetic improvement of Rhododendron spieces.

The Legal Metaverse and Comparative Taxonomy: A Reappraisal

Abstract The present Article revisits my “Three Patterns of Law: Taxonomy and Change in the World’s Legal Systems”—published in this very Journal a quarter century ago—which acknowledged the ideological nature of the law versus politics distinction and posited taxonomy as a means for understanding law. The original article classified law into professional law, political law, and traditional law, and heralded the tentative and dynamic natures of such classification. The two purposes of the present Article are to (i) reflect on legal transformations that have since occurred as reactions to global geopolitical, technological, and economic changes, and (ii) interrogate whether epistemological assumptions that produced the Three Patterns of Law hypothesis still hold. The question the present Article poses is whether a fourth pattern of law is now necessary to capture the new technological state of affairs and the new geopolitical balances of power: in particular, should a rule of smart law be introduced? This Article surveys some of the relevant legal transformations capable of impacting the mapping of each legal pattern to a given geography. Because the Internet (like law, religion, tradition, or language) is an informative-normative system that has produced a new frontier of development, and because of its ubiquity, I have used it as a test for the current viability of the hypothesis. I conclude that it is too early to add a fourth pattern of law; but it is, perhaps, too late to avoid a pattern of no law taking over global hegemony by substituting algorithms for lawyers.

Web-Based Google Translate Inconsistencies in Bahasa-Arabic Translations from the ‎Arabic Thesis Writer's Perspective

This research aims to reveal the inconsistencies of machine translation from the perspective of students who use web-based Google Translate in their Arabic thesis. This research has an impact on translation machine users from Arabic teachers and researchers to be more careful in using Google Translate when translating from Bahasa to Arabic, especially in inconsistent aspects. The researcher used a mixed method with an Explanatory Sequential Design‎ because after distributing questionnaires in collecting quantitative data to collect patterns of inconsistencies that occurred, it was important to explain the initial findings from the quantitative data qualitatively through interviews. ‎Quantitative data is analyzed using simple percentage statistics, then qualitative data is analyzed through four steps, namely data collection, reduction, presentation, and conclusion. The results of this research found that inconsistencies in web-based Google Translate translation results were found in four patterns. First, Google Translate is very inconsistent in translating terms that have the same meaning (mutarodifat), but the terms that appear in the translation results are often different, even within the same paragraph. Second, inconsistencies very often also occur in the aspects of mufrad, mutsanna and jamak, the Google translation machine cannot differentiate between the singularity and plurality aspects of the object being translated, so translation errors often occur where a singular word that should be translated as mufrad will instead become plural or on the contrary. Third, the translation machine does not recognize the gender of the subject in the translated sentence, so translation inconsistencies in the mudzakkar and mu'annats aspects occur very often. Inconsistencies in the gender aspect, as well as the mufrad, mutsanna, and jamak aspects, have an impact on the fourth error pattern, namely grammatical inconsistencies, namely errors in using the verb (fi'il) in a sentence. Of the four patterns of inconsistency, the term inconsistency is a new thing that has not been revealed much. The grammatical aspect is closely related to aspects of the singular or plural form as well as the masculine or feminine form which is the subject of the translated sentence and needs to be discussed further by other researchers.

Persian noun-noun nominal compounds: metonymy and conceptual blending

The current study seeks to clarify various ways in which metonymy can affect the meaning of Persian noun-noun nominal compounds. An analysis of 280 endo- and exocentric Persian noun-noun nominal compounds reveals that as far as the role of metonymy in the construction of meaning is concerned, this cognitive mechanism can affect the meaning of Persian nominal compounds in four ways as follows: a) metonymical modifier, b) metonymical head, c) metonymical head and modifier, and d) metonymic nominal compounds as a whole. While the pattern of metonymical modifier only affects the meaning of endocentric compounds, the other three patterns function in the meaning of exocentric compounds. This study substantiates Brdar and Brdar-Szabo’s (2013) and Brdar’s (2017) assertion that metonymy may either act upon the constituents of the compound, i.e., before compounding (the first, second, and third pattern), or the compound as a whole, i.e., after the combination of constituents (the fourth pattern). It is also argued that the metonymical relationship between head and modifier cannot be regarded as a pattern. If such an argument was plausible, non-figurative endocentric compounds would also be metonymical and compounding would basically require the functioning of metonymy.

A Phase Retrieval Method for 3D Shape Measurement of High-Reflectivity Surface Based on π Phase-Shifting Fringes.

Fringe projection profilometry (FPP) has been widely used for 3D reconstruction, surface measurement, and reverse engineering. However, if the surface of an object has a high reflectivity, overexposure can easily occur. Image saturation caused by overexposure can lead to an incorrect intensity of the captured pattern images, resulting in phase and measurement errors of FPP. To address this issue, we propose a phase retrieval method for the 3D shape measurement of high-reflectivity surfaces based on π phase-shifting fringes. Our method only requires eight images to be projected, including three single-frequency three-step phase-shifting patterns and one pattern used to provide phase unwrapping constraints, called conventional patterns, as well as the π phase-shifting patterns corresponding to the four conventional patterns, called supplemental patterns. Saturated pixels of conventional fringes are replaced by unsaturated pixels in supplemental fringes to suppress phase retrieval errors. We analyzed all 16 replacement cases of fringe patterns and provided calculation methods for unwrapped phases. The main advantages of our method are as follows: (1) By combining the advantages of the stereo phase unwrapping (SPU) algorithm, the number of projected fringes is reduced. (2) By utilizing the phase unwrapping constraint provided by the fourth fringe pattern, the accuracy of SPU is improved. For highly reflective surfaces, the experimental results demonstrate the performance of the proposed method.

Value‐based bricolage: Resource mobilization in the circular economy

AbstractCircular‐born firms face resource constraints first, as they emphasize the use and reuse of materials as an opposite to the linear production system of taking, making, and disposing of resources, and second, due to systemic challenges like lack of scale and information on resources. Given these challenges, entrepreneurs need to find novel solutions for resource mobilization in the circular economy (CE). This study aims to identify how entrepreneurs mobilize resources to accomplish these challenges. With qualitative, multiple‐case study research in circular‐born firms developing a CE business model (CEBM), we identify four patterns of resource mobilization serving different purposes in the development of a CEBM. While three patterns—resource seeking, material bricolage, and ideational bricolage—are established concepts in entrepreneurship, we identify and conceptualize a fourth unique pattern in the CE: value‐based bricolage. By conceptualizing the activity domains of value‐based bricolage and examining the motivation and outcomes of each pattern in designing CEBMs, we provide new insights into how solutions to challenges concerning the use of resources in the CE enable circularity.

Social Interaction Patterns of Muslim-Hindu in Kampung Loloan, Jembrana

Bali has been a model of unique multicultural life, including inter-religious harmony. This study aimed to describe the social interaction of Muslim-Hindu in Kampung Loloan, Jembrana Bali. The type of study was qualitative research, where research data was obtained through literature review, observation, and interviews with Balinese cultural observers and community leaders of Kampung Loloan. The results showed that from the Dutch colonial era (17th century) until the post-reform era, social interaction between Muslims and Hindus in Kampung Loloan experienced ups and downs. In general, social interaction could be sorted into four patterns: (1) social interaction based on kinship (menyamebraya); (2) social interaction based on partnership; (3) social interaction based on the spirit of competition; (4) social interaction based on prejudice. The first, second, and third patterns of social interaction could support the Ajeg Bali movement and the multiculturalism development that strengthened the Unitary State of the Republic of Indonesia (NKRI). Meanwhile, the fourth pattern of social interaction was a latent danger that needed to be anticipated because it could ignite social conflict and reduce national integration.

Vibration analysis of sandwich cylindrical shells made of graphene platelet polymer–viscoelastic–ceramic/metal FG layers

In this paper, natural frequencies and loss factors of cylindrical sandwich shells composed of the viscoelastic core layer, surrounded by functionally graded graphene-platelet reinforced polymer composite (FG-GPLRPC) and ceramic/metal (FG-ceramic/metal) are investigated. The viscoelastic layer is modeled via the fourth parameter fractional viscoelastic pattern, and the functionally graded ceramic/metal layer is theoretically modeled using a power-law function. The uniform, symmetric and un-symmetric patterns are considered for simulating the graphene platelet (GPL) nanofillers distributions along with the thickness direction. The classical shell theory is used for functionally graded layers and properties of the effective materials of GPLRPC multilayers are determined by using a modified Halpin–Tsai micromechanics model and the rule of mixture. The governing equations of motion are extracted by applying the Lagrange equation and the Rayleigh-Ritz method. The determinant of the coefficient matrix of the characteristic equation is calculated, and the natural frequencies and loss factors of the system are extracted. A study of the interactions of materials and geometrical factors such as the ratio of radius to length, the properties of functionally graded materials, and GPL weight fractions for patterns of proposed distributions are presented and some conclusions have been formed.

Strategi Kelangsungan Pedagang Kecil di Pasar Tradisional

The Small Scaled businesses at Blauran traditional market Surabaya perform their businesses commercially in impersonal and independent market system. In order to survive, those businesses depend hiqhly on the ability in attracting buyers/\. The trategy used to draw the buyers’ interests is by adding the capitals of the businesses throuqh merchandise credit system, in the sense that they continuously increase their merchandise on display by gaining them from the creditors. This study applied qualitative method to obtain descriptive data, while the research samples were taken by using Purposive Sampling technique, based on the merchandise they sell to the customers.
 The data analysis described the social background of those small-scaled business operators before they decided to be small-scaled traders, their ages and education, their geograpchical mobility, and their binding to their native culture. In addition, it also discussed the business activities of those small-scaled merchants, related to their business chains, their capitals and their relationships with the buyers. In their trading chains, those merchants applied the strategy of increasing their business capital throught merchandise credit system, producer consigment, agent consigment, and supplier consigment. There are five patterns of credit they applied in order to increase their capitals. They are : (1) regular customer credit, (2) upon selling payment credits, (3) installment system, (4) consignment, and (5) comission system. The first pattern enables the merchants to obtain a relatively large amount of merchandise credits with a payment due after a certain period of time. The second pattern provides the merchants with merchandise in the morning and the payment due is at night. While the third pattern enables them to get merchandise with a regular partial payment at agreed time periodically. The fourth pattern means that they obtain merchandise from supplier and the payment can be done when the goods have been sold. And the fifth pattern enables the merchants to obtain merchandise with the basic price agreed by the merchants and the suppliers, then the merchants can resell it at a price profitable for them. The above five patterns are done by the merchants, not only to increase the volume of their merchandises but also to establish position in the distibution chains of the market.

Ultrasound patterns of metastases from papillary thyroid cancer in soft tissues of the neck

Purpose of the study. To assess ultrasound features and patterns of features for metastatic papillary thyroid cancer (PTC) in soft tissues of the neck.Materials and methods. The study included 335 histologically confirmed metastases and 102 benign lymph nodes (LN). Statistical processing was carried out in the SPSS program. The reliability between the groups was assessed by criterion t with a significance level of p < 0.05. The informative value of ultrasound signs and patterns of signs, and the probability of the presence of metastasis using binary logistic regression are calculated.Results. The 14 criteria for metastasis have been studied. There are 33 signs, i.e. types of criteria. During the statistical analysis, six most informative criteria were established: calcifications, contours, shape, depth-to-width ratio in the transverse scanning plane, state (differentiation) of the cortical and cerebral layers, echostructure. To create complexes (patterns) of ultrasonic signs, a combination of these signs was used among themselves, and five patterns were established. The first pattern, including the depth-to-width ratio in the transverse scanning plane and the echo structure, has a sensitivity (Se) of 97 %, diagnostic accuracy (Ac) of 96.5 %, area under the curve (AUC) of 96 %, the probability ranges from 95 to 99 %. The Se of the second pattern, including the ratio of depth to width in the transverse scanning plane, echostructure and shape, was 97.2 %, Ac – 96.8 %, AUC – 97.3 %, probability – 95–100 %. The third pattern, including the ratio of depth to width in the transverse scanning plane, nature, shape and contours, and the fourth pattern, including the following criteria, the ratio of depth to width in the transverse scanning plane, echostructure, shape, contours and differentiation into cortical and cerebral layers, have Se 96.9 %, Ac – 97.1 %, AUC – 98.7 %, probability – 88–100 %. The fifth pattern, including the ratio of depth to width in the transverse scanning plane, echostructure, shape; contours; state (differentiation) of the cortical and cerebral layers; calcinates, has Se – 99.6 %, Ac – 99.5 %, AUC – 99.9 %, probability – 94–100 %.Conclusion. Five patterns of metastatic involvement of lymph nodes in PTC were found. The informative value of US increased from the first to the fifth pattern achieving a Se of 99.6 %, Ac of 99.5 %, AUC of 99.9 %. The probability ranged from 94 % to 100 %.

Evaluation of Hepatitis B viral Serological Patterns and HBV DNA levels in Hepatitis B subjects at Nauth Nnewi, Southeastern Nigeria

Nigeria is one of the countries with the highest incidence of Hepatitis B Virus (HBV) infection worldwide. The inaccessibility and unaffordability of HBV DNA quantification (viral load) assay which is the key laboratory test for therapy initiation, and monitoring is a challenge to HBV management. This study aimed at evaluating the HBV DNA viral load differences across the serological markers of HBV in order to develop a more cost-effective diagnostic algorithm for Hepatitis B management. Cross sectional study design was used with a total of 264 subjects comprising of 88 HBsAg seropositive treatment naïve subjects, 88 HBsAg seropositive subjects on antiviral therapy as case subjects and 88 age-matched apparently healthy HBsAg seronegative individuals were recruited as control subjects. Hepatitis B Virus DNA assay was performed using real time PCR technique, Hepatitis B core Antibody Immunoglobulin M and Hepatitis D Virus Immunoglobulin G assay. Immunochromatography was used for HBV Panel, Hepatitis C Virus assay and Human Immunodeficiency Virus testing. The non-treatment group has higher viral load (M=805.50 IU/ml) compared with treatment group (M = 65.50 IU/ml) (p<0.001). There was a significant difference in the HBV DNA levels of the four serological patterns observed in the study (P< 0.001). Among the four serological patterns observed, the second pattern with positive surface antibody, positive envelope antigen and negative envelope antibody showed highest viral load (M= 46850189.50 IU/ml) followed by the third pattern with negative surface antibody, negative envelope antigen, and negative envelope antibody (M=46555 IU/ml). The first pattern which has negative surface antibody, negative envelope antigen and positive envelope antibody has the lowest viral load (M=21.00 IU/ml) followed by the fourth pattern with positive surface antibody, negative envelope antigen and positive envelope antibody (M=493.00 IU/ml). This study showed that HBV serological markers can predict viral load and should be used as its alternative in resource poor settings.

Abstract 765: Hybridized-capture sequencing methods bias analysis of antigen presentation genes

Abstract Introduction: Tumor-immune dynamics are often interrogated using hybridized capture-based sequencing approaches which require the use of baits that target the protein-coding regions of the genome. However, the genes encoding the antigen presentation machinery, including human leukocyte antigen (HLA) proteins, are very polymorphic, resulting in thousands of unique genotypes across patient cohorts. Here, using whole exome sequencing (WES) and hybridized capture-based RNA sequencing (RNAseq) from melanoma patients, we show that these genes are not uniformly assessed by common sequencing methods, and require careful analysis for accurate detection of copy number and somatic alterations. Methods: WES and RNAseq data was analyzed from 760 melanoma tumor biopsies, with WES derived from patient-matched normal blood samples. Coverage metrics for 26 antigen presentation genes, including classical and non-classical HLA genes, were evaluated, and the difference in coverage was calculated for heterozygous alleles. Each individual was assessed for heterozygous single nucleotide polymorphisms (SNPs) within each allele, and with respect to the haplotype of the human reference genome. Results: Focusing on the 26 genes assessed, HLA-A, HLA-B, HLA-C, and HLA-DRB1 were the most diverse across our patient cohort; there was an average of 134 unique pairs of HLA alleles in these genes. We compared the SNP profiles of allele combinations to the haplotype of the human reference genome, and observed four patterns: heterozygous alleles are similar to each other and the reference haplotype, heterozygous alleles are different from each other and different to the reference, alleles are very similar to each other and greatly differ from the reference, or one allele is more similar to the reference haplotype. The fourth pattern showed the greatest bias in sequencing, where the allele more similar to the human reference genome had a median 4-fold increase in coverage in normal WES data. Conclusions: Capture-based sequencing shows selection bias, as exome probes have been designed based upon the reported human reference genome, but results in selection bias in hybridized capture sequencing approaches. Alleles that have higher polymorphic differences with respect to the reference are not equally captured, resulting in nonuniform sequencing of heterozygous alleles. Citation Format: Egmidio Medina, Katie Campbell, Antoni Ribas. Hybridized-capture sequencing methods bias analysis of antigen presentation genes [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 765.

Peculiarities of modulating effects of “Myroslava” and “Khrystyna” mineral waters on neuroendocrine-immune complex and metabolism in patients of Truskavets’ spa

Background. Earlier we found effects on the neuroendocrine-immune complex and metabolism, which are common to the mineral waters "Myroslava" and "Khrystyna", instead different from the effects of Naftussya water. The purpose of this article is to find the specific effects of these waters. Materials and Methods. The object of clinical-physiological observation were 22 men aged 23-70 years, who underwent rehabilitation treatment of chronic cholecystitis and pyelonephritis in remission in the Truskavets’ spa. The examination was performed twice, before and after a 7-10-day course of balneotherapy. Half of the patients received bioactive water Naftussya and sulfate-chloride sodium-magnesium mineral water "Myroslava" (M 5 g/L), and the other half - Naftussya and "Khrystyna" (M 10 g/L). The subject of the study were the parameters of the neuroendocrine-immune complex, microbiota, cholekinetics and metabolism. Results. Screening revealed specific changes in 37 parameters grouped into 5 patterns. The first pattern combines 11 parameters that decrease under the influence of "Myroslava" water (Myr), while increase under the influence of "Khrystyna" water (Khr). For the other 7 parameters of the second pattern, Myr acts similarly, while Khr is ineffective. Both mineral waters have a stimulating effect on 8 parameters, while Myr is inferior to Khr. Myr has a upregulating effect on 9 parameters of the fourth pattern, while Khr has a downregulating effect. Finally, sodium excretion and leukocyturia are reduced under the influence of both waters, but to a greater extent under the influence of Khr. Conclusion. The newly created sulfate-chloride sodium-magnesium drinking mineral waters of Truskavets’ spa have both common and specific favorable modulating neuroendocrine, metabolic and immune effects on patients with chronic cholecystitis and pyelonephritis.

A proposed magnetic resonance imaging grading system for the spectrum of central neonatal parasagittal hypoxic\u2013ischaemic brain injury

AimTo describe the spectrum of parasagittal injury on MRI studies performed on children following severe perinatal term hypoxia–ischaemia, using a novel MRI grading system, and propose a new central pattern correlated with neuropathologic features.MethodsMR scans of 297 patients with perinatal term hypoxia–ischaemia were evaluated for typical patterns of brain injury. A total of 83 patients that demonstrated the central/basal ganglia–thalamus and perirolandic pattern of injury were categorised according to the degree of severity. The perirolandic injury was graded by the degree of interhemispheric widening, paracentral lobule involvement and perirolandic cortex destruction leading to a tiered categorisation. Of these 83 patients, 19 had the most severe subtype of injury. A detailed analysis of the clinical data of a subset of 11 of these 19 patients was conducted.ResultsWe demonstrated the mild subtype in 21/83(25%), the moderate subtype in 22/83(27%) and the severe subtype in 21/83(25%). A fourth pattern was identified in 19/83(23%) patients with a diamond-shaped expansion of the interhemispheric fissure, concomitant thalamic, putaminal, hippocampal and other smaller substrate involvement indicative of the most destructive subtype.ConclusionsWe propose a new MR grading system of injury at the parasagittal perirolandic region related to severe, sustained central perinatal term hypoxia–ischaemia. We also introduce a previously undescribed pattern of injury, the most severe form of this spectrum, seen especially after prolongation of the second stage of labour. This constellation of high metabolic substrate, targeted tissue destruction is consistently demonstrated by MRI, termed the massive paramedian injury pattern.

Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events

This study presents the daily atmospheric circulation patterns at surface and altitude related to the South Atlantic Convergence Zone (SACZ) events that occurred between 2007 and 2017. For this analysis, Principal Pattern Sequence Analysis (PPSA) and sea level pressure and geopotential height reanalysis were used. Four typical atmospheric circulation patterns associated with SACZ episodes were identified. Three of them are related to the propagation of a cold front toward southeastern Brazil with a post-frontal anticyclone moving over the Atlantic Ocean. The fourth pattern is associated with the presence of a cut-off low centered over the central-south region of Brazil that induces moisture transport from the Atlantic Ocean and from the Amazon basin to most of southeastern Brazil. Considering the first three patterns, they represent, respectively, a frontal wave, a classical cold front, and a slow-moving cold front. All of these patterns provide permanent northwesterly winds in the lower troposphere over southeastern Brazil from two days before the SACZ occurrence.

Clustering of different atmospheric patterns leading to an increase in different types of atmospheric pollutants in the greater Tehran area during the last 17 years (2004-2020)

Introduction: Air pollution is one of the main problems of industrial and large cities like Tehran, due to its harmful effects, especially on human health. Materials and methods: Based on the intensity and continuity of the standard air pollution index during 2004-2020 for 112 cases in Tehran, the principal component analysis method was applied in T-mode and clustering of days for similar 500hPa geopotential height changes were provided. The synoptic patterns leading to these different pollution cases were obtained. Results: The study of the mentioned days shows the activity of five atmospheric patterns with the frequency of 47, 28, 12, 13, and 4%, respectively. Conclusion: The first pattern happens during the cold season, associated with the simultaneous placement of the atmospheric ridge along with Siberian high-pressure system. The second group, which occurs mostly in summer and during late spring, is controlled with the predominant ozone pollutant. The main activity of the third pattern occurrences in summer and late spring, which is associated with the presence of monsoon Indian low-pressure on the southeastern regions in Iran. The fourth pattern, which occurs mostly in spring and autumn, associates with the establishment of dynamic low pressure in the western regions of Iran and Iraq, as well as the establishment of the thermal low-pressure system in the central part of the country. The last group is a local pattern that occurs due to the passage of the gust front and the shear of the wind field dust rise in the Tehran.

Analysis of interference patterns using a simplified ripple tank, a smartphone camera and Tracker

This paper presents a thorough method for studying the interference of water waves. The study aimed: (a) to demonstrate the interaction of two coherent waves, which creates interference patterns, and (b) to analyse the interference patterns. Three main tools were employed: a simplified ripple tank to experiment, a smartphone camera to record the experiment, and Tracker to quantify the experiment video. The quantification was designed to investigate experimental measurement, asymptotic approximation and linear approximation of the interference patterns. The results showed that the demonstration was impressive in that the interference patterns were appealingly depicted in the video recording. The quantification was highly accurate, with an error of about 3%. The investigation indicated that the measured values agreed with the asymptotic prediction throughout the entire range, with errors of about 3%. Errors between the measured values and linear approximation dramatically increased from the fourth pattern. The findings caution teaching and learning against using the linear approximation for predicting interference patterns of water waves. In conclusion, this study exposes implications for teaching and learning interference phenomena comprehensively.

Four distinct Northeast US heat wave circulation patterns and associated mechanisms, trends, and electric usage

Northeastern US heat waves have usually been considered in terms of a single circulation pattern, the high-pressure circulation typical of most heat waves occurring in other parts of the world. However, k-means clustering analysis from 1980–2018 shows there are four distinct patterns of Northeast heat wave daily circulation, each of which has its own seasonality, heat-producing mechanisms (associated moisture, subsidence, and temperature advection), and impact on electricity demand. Monthly analysis shows statistically-significant positive trends occur in late summer for two of the patterns and early summer for a third pattern, while the fourth pattern shows a statistically significant negative trend in early summer. These results demonstrate that heat waves in a particular geographic area can be initiated and maintained by a variety of mechanisms, resulting in heat wave types with distinct impacts and potential links to climate change, and that pattern analysis is an effective tool to distinguish these differences.

We Can Do This Thing Together: Intergenerational Learning and Academic Motivation among Community College Students

ABSTRACT This qualitative study examines how intergenerational learning contributed to academic motivation among students of different ages in the Florida College System, the state’s community college system. The data for this study included 166 semi-structured focus groups with 375 students collected during site visits to 21 state colleges over a five-year period. This study considers both familial intergenerational learning, in which members of different generations in the same family learn from one another, and extrafamilial intergenerational learning, in which members of different generations not in the same family learn from one another. Overall, familial intergenerational learning was a more prominent theme than extrafamilial intergenerational learning. Both familial and extrafamilial intergenerational learning included three similar patterns: 1) older to younger learning, 2) younger to older learning, and 3) reciprocal learning, but familial intergenerational learning also included a fourth pattern of indirect intergenerational learning that is not reflected in extrafamilial intergenerational learning. Recommendations for practice are also provided including formalizing some of the informal forms of intergenerational learning that we highlight in our data.