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Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Tes Kognitif AJT yang dikembangkan oleh Universitas Gadjah Mada (UGM) merupakan alat asesmen psikologis inovatif yang dirancang khusus untuk mengevaluasi kemampuan kognitif anak-anak Indonesia berusia 5-18 tahun. Meskipun memiliki potensi yang signifikan, penerapan tes ini masih terbatas, sehingga perlu diperluas penggunaannya di berbagai konteks pendidikan dan klinis. Penelitian ini bertujuan untuk mengevaluasi efektivitas dan tantangan praktis dalam penggunaan Tes Kognitif AJT dari perspektif tester yang telah tersertifikasi, dengan menggunakan desain penelitian kualitatif untuk mendapatkan pemahaman yang mendalam. Data dikumpulkan melalui kuesioner dengan pertanyaan terbuka yang diisi oleh 14 tester AJT sehingga memungkinkan pemahaman yang lebih detail mengenai pengalaman dan penilaian mereka. Temuan penelitian ini menunjukkan bahwa Tes Kognitif AJT dipandang sebagai alat yang komprehensif dan relevan secara budaya untuk menilai kemampuan kognitif anak-anak Indonesia. Meskipun beberapa peserta mengalami kesulitan awal, terutama terkait dengan pelaksanaan tes, mayoritas berhasil mengatasi tantangan tersebut. Mereka menekankan kemampuan tes ini untuk memberikan analisis mendalam tentang fungsi kognitif dan mengungkap potensi laten anak-anak. Penelitian ini menegaskan pentingnya memperluas penggunaan Tes Kognitif AJT untuk meningkatkan asesmen kemampuan kognitif di Indonesia, serta menekankan perlunya pelatihan dan dukungan berkelanjutan bagi para tester.

The genetic variability of important fiber quality traits of cotton such as: uniformity Index (UI); fiber elongation before breaking (Elongation, Elg) and micronaire (Mic) were studied. Qualitative characteristics were tested on the HVI (High Volume Instrument) system, in accordance with the international classification. Local cotton varieties (Agdash-3, AP-317 and Elekberi), Turkish testers (Sezener 76, Naz 07, Ozbek and GSN 12) and 12 incomplete diallelic hybrid combinations were evaluated to determine the potential of parental varieties, F1 and F2 hybrids using effective method - combining ability. Analysis of variance, carried out on the basis of data from all studied combinations, made it possible to identify one local line (AP-317) and two foreign testers (Naz 07 and GSN 12), which had, to varying degrees, positive effects of total combining ability (TCA). This indicates additive types of expression of non-allelic genes responsible for the formation of the studied qualitative properties of cotton fiber. Variations in the SCS of hybrid combinations were generally lower than the effects of the GCS. When assessing second-generation hybrids, we determined that lines and testers with positive effects of GCA and hybrid combinations with their participation were distinguished by high indicators of the fiber quality in the next generation. Consequently, selection of genotypes with improved fiber quality carried out in early generations can be effective, which will accelerate the creation of new promising varieties and lines of cotton. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Plant Production is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of this research was to evaluate the general and specific combinational ability of inbred winter rye lines in plant height and to identify relatively short-stemmed combinations. The starting material for the crossing was 22 homozygous rye lines carrying sterile cytoplasm of the Pampa type. The male fertile homozygous lines mf H‑1423, mf H‑1247, mf H‑732, and mf H‑842 were used as testers, in which the plant height was 122, 120, 102, and 100 cm, respectively. Test crosses were carried out in isolated plots according to the topcross scheme. A total of 88 simple F1 hybrids were produced. These were tested on plots of 8.0 m2 in three repetitions. The average height of plants in F1 hybrids was 129 cm and ranged from 114 to 145 cm. The hybrids with the mf H‑732 and mf H‑842 testers turned out to be the shortest-stemmed, and the tallest ones were those with the mf H‑1423 tester. Both general (GCA) and specific (SCA) combinational abilities made a significant contribution to the variance of the plant height trait. The genotypes ms H‑422 and ms H‑1179 had a significantly higher GCA compared to other lines, while ms H‑700 and ms H‑1058 had a lower GCA. Among the testers, the high-stemmed mf H‑1423 and mf H‑1247 lines had a significantly high GCA, and the short-stemmed mf H‑732 and mf H‑842 testers had a significantly low GCA. Combinations involving short-stemmed testers made up a group of the shortest-stemmed hybrids, in which plant height varied from 114 to 120 cm. It has been shown that lines with low effects are of great value for practical breeding not only for GCA, but also for SCA. The ms H‑700 line is of interest, which simultaneously combines low GCA and SCA. [ABSTRACT FROM AUTHOR]

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction Tomato is a self-pollinated crop and has a high potential for heterosis production. Tomato has a wide range of diversity in terms of vegetative and fruit traits. Therefore, learning information about the genetics of the tomato plant and the inheritance of its various traits to the next generation will help plant breeders to use appropriate breeding methods to improve them. One of the methods that is used to know the genetic structure of plants, identify parental lines and determine their combining ability is line × tester analysis. Line × tester analysis provides information about general and specific combining of parents and can be useful in estimating different types of gene effects such as additive and non-additive effects. In most of the developed countries, many researches have been done in relation to hybrid production and combining ability among tomato lines, and sometimes the inferred results are different from each other. In Iran, few studies have been done about crossing cultivars and their hybrids, and most of the seeds used by farmers are imported from other countries. Therefore, this study intends to evaluate genetic variance components, general and specific combining ability of some quantitative traits in a number of tomato lines and testers and their hybrids by using line × tester analysis. Materials and Methods This research was conducted in Sari Agricultural Sciences and Natural Resources University, Mazandaran Province, Iran in 2022. Two modified cultivars SC and V as lines and three modified cultivars L, R and MZ as testers were crossed with each other to create F1 hybrids. Six F1 genotypes and their parents (11 treatments in total) were cultivated in the farm in a randomized complete block design with three replications. The evaluated traits included the number of days to the first flowering, earliness, number of fruits per plant, fruit weight per plant (g), fruit yield (g), fruit length and width (cm). In order to analyze the variance of the experimental design to search for diversity between treatments, to separate the effects of treatments into their components based on line × tester analysis, to mean comparison with Duncan's test, and also to calculate the general and specific combining ability, R statistical software was used. Also, in order to calculate additive and non-additive variances, Singh and Chaudhary's method was used. Results and Discussion The results of line × tester variance analysis showed that the mean squares of parents and testers were significant for all traits except fruit length and width, and the mean squares of crosses and lines were significant for all traits except fruit length. The effect of line × tester was significant for all traits except the number of fruits per plant and fruit length. The line of SC to improve the number of days to first flowering, earliness, plant height, fruit weight per plant, and fruit width, and the line of V to improve the number of fruit per plant were the best general combiners with testers. The tester of L for improve all traits except yield, and the tester of MZ for improve plant height were the best general combiners with the maternal lines. Among the crosses, the SC×L cross for improve earliness and fruit width, and the SC×R and V×MZ crosses for improve plant height and fruit weight per plant, respectively, were favorable specific combiners. The mean comparison of the genotypes for some important traits showed that among the parental cultivars, the line of SC and among the crosses, the SC×L genotype had the lowest means for the number of days to first flowering and earliness. Also, the line of SC for the number of fruits per plant and the SC×L genotype for fruit weight per plant, yield and fruit width had the highest means. Also, the estimation of additive and non-additive variances indicated that in plant height and fruit weight per plant traits, additive variance plays the main role. While for the traits of the number of days to first flowering, earliness and yield, the contribution of non-additive variance was more than the additive variance. Conclusion According to the results obtained from this study, in future projects it is recommended to use parents that have significant general combining ability (GCA) for traits. Because such parents easily transfer the trait to their next generation. In this way, the line of SC was a good general combiner for the number of days to first flowering, earliness, plant height, fruit weight per plant and fruit width, and the line of V was a good general combiner for the number of fruits per plant. Among the testers, the tester of L was a good general combiner for improve the number of days to first flowering, earliness, number of fruits per plant, fruit weight per plant, and fruit width, and the tester of MZ recorded a high GCA for the plant height. Also, for the improvement of earliness and fruit width, the SC×L cross and for plant height and fruit weight per plant, SC×R and V×MZ crosses were favorable specific combiner. Mean comparison of genotypes showed that the SC×L cross is superior to its parents for the number of days to first flowering, earliness, fruit weight per plant, fruit yield, and fruit length and width. The traits of plant height and fruit weight per plant are more affected by additive variance, so the best breeding method to improve plant height and fruit weight per plant is selection from among the segregating population. The traits of number of days to first flowering, earliness and yield were affected by non-additive variance, so hybrid production is recommended to improve the mentioned traits.

Salah satu capaian pembelajaran lulusan pogram studi Psikologi jenjang sarjana (S1) dalam Kerangka Kualifikasi Nasional Indonesia (KKNI) yang disusun oleh Kolokium Psikologi Indonesia (AP2TPI, 2019) adalah mampu melakukan observasi, wawancara dan tes psikologi yang diperbolehkan sesuai dengan prinsip dasar psikodiagnostik dan Kode Etik Psikologi Indonesia. Untuk itu, para mahasiswa dan alumni program studi Psikologi perlu dibekali keterampilan untuk menjadi tester dalam pelaksanaan tes psikologi. Oleh karena itu, penyelenggara pendidikan Psikologi dituntut perlu lebih proaktif membekali para alumninya dengan keterampilan tersebut diluar mata kuliah formal yang sudah ditentukan, seperti dengan memberikan pelatihan soft skill terkait. Pelatihan ini dilakukan bekerja sama dengan salah satu konsultan psikologi di Palembang dan diberikan kepada 9 orang mahasiswa dan alumni psikologi. Pelatihan diberikan dalam kurang waktu kurang lebih dua bulan dan terdiri dari dua sesi, yaitu teori dan praktik langsung. Hasil menunjukkan bahwa pengetahuan dan keterampilan peserta yang mengikuti pelatihan ini berada pada kategori sangat baik dan baik.

Maize is a cereal crop essential to fulfill the need for food and support global food security programs. Maize hybrid varieties play a very significant role in increasing maize production. Objectives of the research were to obtain a tester, which is consistent in identifying inbred lines with a high specific combining ability, and to obtain prospective crossed-hybrids that have the potential assembling to be maize hybrid varieties. The grain yield showed that the specific combining ability values ranged from -3682.2 to 5251.7. Crosses that have high and positive specific combining ability included lines of JG-11, JG-18, JG-34, JG-01, JG-40, JG-B0, JG-19, and JG-02 with a tester of JG-T00; lines of JG-20, JG-01, JG-03, JG-42, JG-02, JG-46, and tester of JG-T14; lines of JG-24, JG-08, JG-23, JG-26, JG-21, JG-07, and JG-06 with a tester of JG-T15; lines of JG-38, JG-40, JG-35, JG-36, JG-01, JG-51, JG-17, JG-B0, and JG-08 with tester of JG-T22; and lines of JG-07, JG-01, JG-26, JG-24, and JG-18 with tester of JG-T37. There were combinations of 9 crosses between inbred lines and the best testers, including JG-06XJG-T15, JG-51XJG-T22, JG-49XJG-T22, JG-B0XJG-T22, JG-35XJG-T22, JG-38XJG-T22, JG-17XJG-T22, JG-36XJG-T22, and JG-49XJG-37, which are potential as prospective maize hybrids that have high productivity.

Model evaluation is a cornerstone of scientific research as it represents the findings' accuracy and model performance. A case study is commonly used in evaluating software engineering models. Due to criticism in terms of generalization from a single case study and testers, deciding on the number of case studies used for evaluation and the number of testers has been one of the researchers’ challenges. Multiple case studies with multiple testers can be difficult in some domains, such as penetration testing, due to the complexity and time needed to prepare test cases. This study aims to review the literature and examine the evaluation methods used pertaining to the number of case studies and testers involved. This study is beneficial for researchers, students, and penetration testers as it provides case study design steps that are useful to determine the appropriate number of test cases and testers required. The paper's findings and novelty highlight that a single case study with a single tester is enough to evaluate a model. It also strikes a balance between what is enough for the evaluation and the need to reduce criticisms of a single case study by using two case studies with a single tester. Doi: 10.28991/ESJ-2023-07-03-025 Full Text: PDF

The aim of the study is to quantify the contribution of additive, dominant, and epistatic dispersions to the overall genetic variation of the 1000-grain weight trait to increase the efficiency of breeding heterotic hybrids of winter rye. The experiments were carried out at the experimental base of the Federal Research Center Nemchinovka (Moscow oblast). The starting material was ten male sterile homozygous inbred lines carrying the Pump-type cytoplasm. These lines were crossed with two male fertile test lines: mf H-842 and mf H-1247. Test crosses were carried out in 2019 on two isolated plots according to the topcross scheme. The resulting hybrids and their parent forms were tested in 2020 and 2021 on plots of 8 m2 in twofold repetition. The test for epistasis and decomposition of the genetic varianсе into additive and dominant components was carried out by the method of Jinks, Perkins, and Brees (1969). The data show that the additive interaction of genes, as well as incomplete dominance, plays the main role in determining the trait of granularity. A stable ratio of these interactions was established over the years: the proportion of additive effects varied at the level of 83.9–84.7%, and the proportion of dominant effects at the level of 15.3–16.1%. The indicator of the degree of dominance was less than one and varied slightly over the years. It follows from this that dominant alleles affecting gross grain do not completely suppress the effect of their recessive alleles. For this reason, simple interlinear hybrids inherit an intermediate phenotype compared to the parent forms. The most coarse-grained hybrids were obtained by crossing lines ms H-1054, ms H-649, and ms H-1090 with the coarse-grained tester mf H-1247. It is concluded that, in the synthesis of commercial rye hybrids, it is necessary to strive to ensure that all parent forms are gross-grained. To obtain such lines, it is advisable to use methods of recurrent selection as well as convergent and cumulative breeding. [ABSTRACT FROM AUTHOR]

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Northwest A & F University - Natural Science Edition is the property of Editorial Department of Journal of Northwest A&F University (Natural Science Edition) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Identification of the inbred lines perspective for combining abilities of winter rye is an important stage in the hybrid breeding cycle. The objective of the surveys is to evaluate the general and specific combining abilities of the inbred lines of winter rye with a topcross method. Thirty rye homozygous lines carrying the sterility-inducing cytoplasm of the Pampa type served as the maternal inheritance patterns. Four male fertile homozygous lines mfН-1432, mfН-1423, mfН-1147, and mfН-1842 were used as testers. Test crossings were performed on the spatially isolated fields in 2019. Overall, 120 simple interlinear F1 hybrids were produced. Their testing was carried out on the plots of 8.0-m2 area with two field replicates. The Valdai cultivar was used as a standard at the population level. The F1 hybrid crop yields varied from 5.08 to 7.55 t/ha at the parameter average value of 6.27 t/ha within the experiment. The hybrids containing lines msН-1185-1 were considered highest-yielding crops. Their crop yields varied from 6.92 to 7.48 t/ha relative to the tester. Frequency of occurrence of hybrids F1 with reliably high competitive heterosis comprised 20 of 120, or 16.7%. Both the general (GCA) and specific (SCA) combining abilities made the essential contribution to dispersion of the crop-related traits. In addition, the portions of the GCA and SCA effects comprised 91.2 and 6.9% of dispersion of the crop-related traits, respectively. A high variance GCA/SCA ratio indicates rather substantial genetic divergence between the inbred lines used in breeding. Rather high GCA is recorded for seven sterile lines, such as msH-1185-1, msH-1185-2, msН-1179, msН-1238, msН-700, msН-48, and msН-1247. The line mfН-1147 was considered best on GCA among the tester lines. Lines msН-451, msН-577, msН-842, msH-1185-2, and msН-1190 and testers mfН-1432 and mfН-1423 showed great SCA effects. The average crop yield of the hybrids containing lines of high GCA was reliably higher than that in the hybrids containing lines of high SCA (6.76 vs. 6.24 t/ha, true T-value Tfact = 3.38 > T05 = 2.22). However, nine sterile lines possessed significantly lower GCA. A positive correlation between the line GCA effects and the levels of their crop yields was revealed (r = 0.59, true T-value Tfact = 2.30 > T05 = 2.22). [ABSTRACT FROM AUTHOR]

Copyright of Bearing is the property of Bearing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The increase of planting density is a dominant approach for the higher yield of maize. However, the stalks of some varieties are prone to lodging under high density conditions. Much research has been done on the evaluation of maize lodging resistance. But there are few comprehensive reports on the determination of maize lodging resistance in situ without injury under field conditions. This study introduces a non-destructive in situ tester to determine the lodging resistance of the different maize varieties in the field. The force value can be obtained by pulling the stalk to different angles with this instrument, which is used to evaluate the lodging resistance of maize varieties. From 2018 to 2020, a total of 1,172 sample plants from 113 maize varieties were tested for the lodging resistance of plants. The statistical results show that the values of force on maize plants at 45° inclination angles (F45) are appropriate to characterize maize lodging resistance in situ by nondestructive testing in the field. According to the F45 value, the maximum lodging resistance Fmax can be inferred. The formula is: Fmax =1.1354 F45 - 0.3358. The evaluation results of lodging resistance of different varieties of this study are basically consistent with the test results of three-point bending method, moving wind tunnel and other methods. Therefore, the F45 value is the optimal index for nondestructive evaluation of maize stalk-lodging resistance under the fieldplanting conditions. [ABSTRACT FROM AUTHOR]

Maize (Zea mays L.) is one of the most important cereal crop cultivated globally. The development of inbred lines and hybrids is among the most widely used breeding strategies in maize. Choice of promising germplasm with good combining ability is a key to the development of high yielding maize varieties. Hence, the study was carried out with the objectives of determining the general and specific combining abilities of maize inbred lines and identifying crosses with higher grain yield and other important characteristics. The experiment consisted of thirty crosses and three popular standard hybrids were laid out in alpha lattice design with two replications during the 2018 cropping season at Adet and the data were analyzed using SAS software. There was a significant difference (p<0.05) among genotypes for all the traits except number of kernels per row and ear length. Mean squares for general combining ability of lines were significantly different at 1% and 5% probability levels for all evaluated traits, whereas specific combining ability was significantly different at 5% probability only for days to maturity, ear height, harvest index and thousand kernel weight. Among the tested inbred lines, L4 was the best combiner followed by L11 for grain yield with the general combining ability effects of 2867.73 and 488.70, respectively. L11 x T2 was the best cross for grain yield with the specific combining ability of 1035.67. Therefore, the crosses (L4 × T1) and (L4 × T2) as well as L11 x T2 can be utilized for developing high yielding hybrid varieties. [ABSTRACT FROM AUTHOR]

Stem borer (SB) and more recently, fall armyworm (FAW) are serious economic pests in maize production in sub-Saharan Africa. It is hypothesized that SB-resistant germplasm may confer resistance against FAW. However, the performance of SB-resistant lines in hybrid combinations and the inheritance of FAW-resistant traits under variable FAW infestations have not been reported. This study was conducted to (i) obtain information on the inheritance of agronomic and FAW-resistant traits under variable FAW infestations; (ii) identify hybrids combining high grain yield (GYLD) and stability under FAW infestations; and (iii) determine the effects of FAW damage on GYLD. Three SB-resistant lines (1393, CKSBL10060 and CML 331) as testers and six open-pollinated varieties (OPVs) as lines were crossed in a line tester scheme to generate eighteen test crosses. The test crosses together with two tester × tester crosses and two checks were evaluated under artificial FAW infestation (AI), natural infestation (NI) and pesticide-protected condition (PC) in Nigeria. Additive and non-additive effects were significant for GYLD, most agronomic and FAW-resistant traits under AI and NI, except ear damage (EDAM) scores under NI, whereas only the non-additive effect was significant for GYLD under PC. Two testers (1393 and CKSBL10060) combined significant and positive GCA effects for GYLD with desirable GCA effects for FAW-resistant traits under AI and NI, whereas CML 331 combined significant and negative GCA effects of GYLD with undesirable GCA effects of FAW resistance under the test conditions. Three OPVs (AWR SYN-W2, AMATZBR-WC4 and TZB-SR) had a significantly positive GCA effect for GYLD and a desirable GCA effect for either leaf damage (LDAM) or EDAM score under AI. The FAW LDAM and EDAM significantly reduced GYLD under AI but not under NI. Three test crosses (AMATZBR-WC4 x CKSBL10060, TZB-SR x CKSBL10060 and TZBR Comp 1-WC2 × 1393) combined high yield with stability and FAW tolerance across the test conditions and thus were recommended for further testing. [ABSTRACT FROM AUTHOR]

Precision control of hydraulic equipment is a distinctive feature of modern hydraulic systems. With the help of special diagnostic devices, it is possible to reliably and simply monitor the operation of hydraulic equipment. Diagnostic methods can be very different. The article lists the stages and methods of checking hydraulic equipment malfunctions, as well as describes the principles of operation of diagnostic devices of well‑known world manufacturers HYDAC, MOOG, used in OJSC “BSW – Management Company of the Holding “BMC”. Schematically, the connection of the MOOG tester to the production equipment is presented when checking the servo valve in autonomous and combined mode, without resorting to dismantling the valve. Continuous monitoring of the oil purity with the help of the HYDAC FCU device allowed saving time on assessing its condition and taking fast‑acting corrective measures to clean the oil from contamination.

This study aimed to test the friction coefficient of cryogenic bearing lubrication materials. A ball-on-disc type friction tester was developed in our lab using air bearings that could simulate the movement of cryogenic bearings under sliding-rolling contact. The tester is equipped with a temperature-controlled chamber to provide a minimum −175 °C low-temperature environment. Using air bearings is an important technique to reduce the base friction of the tester measurement system and ensure the accuracy of the friction coefficient measurement. The friction coefficients of the Ag coating and the PTFE coating were measured at different sliding-rolling velocities on this tester, and the results showed that the friction coefficient curves agreed well with the Gupta sliding model. The developed tester will provide important data for the dynamic analysis and life evaluation of the cryogenic bearings. [ABSTRACT FROM AUTHOR]

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

For the successful development of competitive sunflower hybrids, it is necessary to have a sufficient number of parental lines with valuable breeding traits and high combining ability. In the zone of insufficient moisture of the Rostov region, there were studied the plants to determine the general (GCA) and specific (SCA) combining ability of sunflower lines developed at the Donskaya experimental station named after L. A. Zhdanov (a branch of the FSBSI FRC ARRIMK). To estimate the GCA and SCA, there was used topcross hybridization, which allowed assessing fairly accurate a large set of lines according to any valuable trait. The objects of the study were the CMS lines (“VDG 2563 A”, “VDG 127 A”, “VDG 130 A” and “VDG 121 A”). As testers there were used the pollen fertility restorers (RF-lines) “ED 110 RF”, “ED 155 RF”, “ED 788 RF”. The current paper has presented the analysis of the productivity of the test-hybrids, obtained as a result of topcross hybridization. The estimation of the lines according to the economically valuable traits was carried out in the fields of the station's selection crop rotation. The test plots were five-row with three-fold repetition. The total area of the plot was 22.05 m2, the accounting area was 13.23 m2. The purpose of the current work was to evaluate the effects of GCA and SCA of the new parental lines based on the results of studying the productivity of test hybrids obtained by topcross hybridization. As a result of a three-year study of test-hybrids of sunflower, there were estimated the effects of GSA of lines and testers, SCA constants of hybrids and SCA variance of lines and testers. There have been identified the best lines and testers with the best combining ability “VDG 121 A', “VDG 2563 A”, “VDG 130 A”, “ED 155 RF” and “ED 788 RF” and they have been recommended for breeding work to obtain promising hybrids.

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Current regulations for tests on construction site for plastic anchors in concrete Tests on construction site in the base material concrete are regulated at the European level and in Germany only for approved plastic anchors. In September 2019 the Deutsches Institut für Bautechnik (DIBt) published the technical rule „Durchführung und Auswertung von Versuchen am Bau für Kunststoffdübel in Beton und Mauerwerk mit ETA ...". The Deutsche Ausschuss für Mauerwerk e.V. (DAfM) puplished in 2020 issue 4 of the series of puplications „(Dübel‐) Versuche am Bauwerk in Mauerwerk – Aktuelle Regelungen für Kunststoffdübel und Metall‐Injektionsanker zur Verankerung im Mauerwerk" for the practical implementation of this technical rule for anchorages in masonry. This article summarizes the essential contents of the DIBt technical rule for anchorages in concrete and shows the slight deviations from the regulations in the base material masonry. [ABSTRACT FROM AUTHOR]

The physical fitness test is a method to determine physical abilities whose results are also very much determined in the measurement process carried out by the tester. This study aimed to determine the difficulty the tester has in meeting certain standards in measuring physical fitness in the Indonesian Air Force. This research method uses a qualitative method with a phenomenological approach through interviews with 15 testers. This qualitative data were analysed by referring to the phenomenological qualitative research steps of Moustakas and Cresswell. This study indicates difficulties in standardizing the tester in carrying out physical fitness tests in the Indonesian Air Force due to educational backgrounds, both in general education and military education, as well as corps, rank, and experience of different testers. Moreover, it was also found that there was also a lack of understanding of procedural mastery both in administration, measurement process procedures, and procedures for assessment and reporting of physical fitness test results. Continuous training of the tester is required to improve and monitor the tester's ability. [ABSTRACT FROM AUTHOR]

The present investigation was aimed to study the combining ability and gene action in parents and hybrids of sunflower for seed yield and components traits. Six female lines were crossed with four male lines by Line x Tester method, to obtain 24 F1s. Data were recorded on ten characters. Among the female parents CMS-108A, CMS-250A and CMS-207A were good general combiners for seed yield and other contributing traits. Among the male parents, IB-22, EC-178178, EC-601957 were identified as the best general combiners for seed yield and other yield contributing traits. The crosses showing high desirable SCA effect have involved one of the parents of high GCA effect and in turn, had high per se performance. The SCA effect of hybrids viz., CMS-207A x IB-22 and CMS-108A x GP-6-116 were highly significant for seed yield/plant (g) and other component traits in a desirable direction, indicating that the high performance of these crosses is due to non-allelic gene action. Non-additive gene action is predominant for all the studied characters except days to 50% flowering, plant height (cm) and hull content (%). [ABSTRACT FROM AUTHOR]

We test the effects of Tekster on writing capabilities in large-scale experiments involving 14,400 students and 600 teachers from 172 elementary and secondary schools, a comprehensive strategy-focused writing instruction program, using a switching replication design with three measurement occasions. The researchers formed two groups; Group 1 involved 6900 secondary school children and 310 high school teachers and Group 2 continued with 7500 elementary school children and 290 junior school teachers. The first experiment carried out during initial 18 weeks (between the first and second measurement occasions) in Group 1; while, the second experiment continued during the last 18-week period (between the second and third measurement occasions) in Group 2 implementing Tekster. The results confirm the writing quality of the students shows statistically significant improvements. Current both studies have shown a positive effect on the writing performance of students i.e., ES = 0.63 (Group 1), and ES = 0.75 (Group 2). Finally, the effect size of students completing all 72 Tekster lessons is 0.75. After two phases of eighteen weeks, students in both groups maintained their performance because three genres of writing were evaluated, allowing for generalization across students, classes, and writing assignments. We conclude that an effective way to develop secondary and elementary students' writing capabilities is through a strategy-based writing education tool like Tekster. [ABSTRACT FROM AUTHOR]

Abstract Background To decentralize point-of-care early infant diagnosis (POC EID), task shifting to cadres such as nurses is important. However, this should not compromise quality of testing through generating high rates of internal quality control (IQC) failures and long result turnaround times. We used data from a POC EID project in Zimbabwe to compare IQC rates and result return to caregivers for samples run on a POC EID technology (Alere q HIV 1/2 Detect) between nurses and laboratory-trained personnel to assess effects of task shifting on quality of testing. Methods This cross-sectional retrospective study used data from all 46 sites (10 hub and 36 spoke sites in Zimbabwe that piloted POC EID for routine clinical use from December 2016 to June 2017). IQC failure rates were downloaded from each POC EID platform and exported to excel to analyze IQC failure rates by type of operator. Turnaround time (TAT) from sample collection to issuing of results to caregiver was extracted from the EID test request form and uploaded into a project specific Excel-based database for analysis. Results A total of 1847 tests were conducted by 45 testers (12 laboratory-trained and 33 non-laboratory-trained personnel), including 165 errors. There were no significant differences in IQC failure rates between non-laboratory testers (137 [9.2%] of 14830 tests) and specialized laboratory-trained (28 [7.7%] of 364 tests; p = 0.354). Over time, IQC failure rates for both non-laboratory (χ 2 = 18.5, p < 0.000) and specialized laboratory-trained testers (χ 2 = 8.7, p < 0.003) decreased significantly. There were similar proportions of clients who were issued with results between samples processed by non-laboratory testers (1283 [98.9%] of 1297 tests) and samples processed by specialized laboratory-trained testers (315 [98.7%] of 319 tests; p = 0.790). The overall median turnaround time from sample collection to receipt of results by caregiver for samples run by laboratory-specialized testers was not statistically different from samples run by non-laboratory-specialized testers (1 day [IQR 0–3] versus 0 days [IQR 0–2]; p = 0.583). Conclusions Similar IQC failure rates and TATs between non-laboratory and specialized laboratory-trained operators suggest that non-specialized laboratory-trained personnel can perform POC EID equally well as specialized laboratory personnel.