PENGARUH KEPERYACAAN DIRI TERHADAP KOMUNIKASI INTERPERSONAL SISWA KELAS X DPIB SMK NEGERI 4 SEMARANG

Abstract: This research aims to determine the influence of self-confidence on communication. The research method used is quantitative regression. The research subjects are 109 students from class X DPIB of the Department of State Vocational High School 4 Semarang, selected using a purposive sampling technique. The data collection method uses non-test techniques in the form of a Likert scale questionnaire consisting of 25 statements for self-confidence and 33 statements for interpersonal communication. The data analysis technique uses simple linear regression analysis assisted by the SPSS 26 program. The results show that self-confidence has a positive effect on interpersonal communication, as evidenced by the R Square value of 0.306. This means that the influence of self-confidence on interpersonal communication (Y) is 30.6%. The coefficient significance value (Sig.) is 0.000 < 0.05, indicating that self-confidence (X) has an effect on interpersonal communication (Y). The regression coefficient shows that the influence of self-confidence (X) on interpersonal communication (Y) is positive.Keywords: Self-Confidence; Communication; Interpersonal Communication.Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh kepercayaan diri terhadap komunikasi. Metode penelitian ini menggunakan kuantitatif regresi. Subjek penelitian adalah siswa kelas X DPIB SMK Negeri 4 Semarang yang berjumlah 109 siswa diambil menggunakan teknik purposive sampling, dengan metode pengumpulan data menggunakan teknik non tes berupa kuisioner model skala likert menggunakan skala kepercayaan diri 25 item pernyataan dan skala komunikasi interpersonal 33 item pernyataan. Teknik analisis data menggunakan teknik analisis regresi linier sederhana dibantu menggunakan program SPSS 26. Hasil penelitian menunjukkan bahwa kepercayaan diri berpengaruh positif terhadap komunikasi interpersonal. Dibuktikan dengan nilai R Square sebesar 0,306. Artinya pengaruh kepercayaan diri terhadap komunikasi interpersonal (Y) sebesar 30,6 %. Coeffiencts nilai signifikansi Sig. sebesar 0,000 < 0,05 sehingga dapat disimpulkan bahwa kepercayaan diri (X) berpengaruh terhadap komunikasi interpersonal (Y). Koefisien regresi menunjukkan pengaruh kepercayaan diri (X) terhadap komunikasi interpersonal (Y) bersifat positif.Kata Kunci: Kepercayaan Diri; Komunikasi; Komunikasi Interpersonal

Les complications thromboemboliques chez les enfants au cours de COVID-19

Letter to the editors

CRITICAL ANALYSIS OF RESTITUTION BURDEN TO THE STATE (STUDY OF HERRY WIRAWAN)

The crime of sexual violence against children is a severe problem that effect urgency to pay attention to protection and prevention. The government approved Law Number 11 of 2022 concerning Sexual Violence Crimes, even though immoral acts are hard to disclose to the surface as appropriate iceberg phenomena. This research was motivated by defendant Herry Wirawan who committed the crime of sexual violence against 12 child victims. This research focuses on the judge's considerations in imposing restitution and defendant criminal liability. This research method is normative legal research with a statue and contextual approach with primary legal sources in the Bandung District Court Decision Number 989/Pid.Sus/2021/PN.Bdg and Bandung High Court Decision Number 86/Pid.Sus/2022/ PT. Bdg. At the District Court, the panel of judges imposes restitution for the state that has experienced a juridical error regarding the difference between restitution and compensation. The district court decision was amended in the appeal-level decision which stated that the defendant would be charged with restitution. From the primary sources, it was found that there are provisions that can be met if the defendant is unable to pay restitution through asset confiscation according to Law Number 11 of 2022 concerning Sexual Violence

Investigation of surface metal matrix composites of reinforced aluminium alloy produced using friction stir processing

Aluminium alloy demonstrates promising excellent properties in many applications. However, aluminium alloy exhibits poor tribological behaviour in some extends. Studies have developed for surface modifications of aluminium alloy in order to alter the surface properties while maintaining the properties of the core. Fusion route and casting methods have been developed to improve the surface properties of aluminium alloy. However, these methods deal with high temperatures that lead to poor wettability of ceramic particle during the process. This research is aimed to investigate the surface modification of aluminium alloy, AA6061 using friction stir processing (FSP). The surface modification of was done on non-reinforced aluminium alloy and reinforced aluminium alloy, namely FSPed AA6061 and FSPed AA6061/RHA, respectively. Rice husk ash (RHA) was used as reinforced material with composition of 6 vol.% . RHA is a ceramic particle which contains high level of silica (SiO2). In this research, FSP was performed at a constant travel speed of 25 mm/min and different rotation speeds were varied at 1000, 1200, 1400, 1500 and 1600 rpm using a probe cylindrical tool. FSP was used as an approach to refine and enhance the mechanical properties and the tribological behaviour of AA6061. A microscopic examination was done using an optical microscope (OM) and revealed that FSP refined the grain size and the reinforced material is successfully held within the alloy. The mechanical properties of the alloys particularly the microhardness, were tested and compared. The average microhardness value decreased as the FSP rotational speed recorded for both FSPed AA6061 and FSPed AA6061/RHA were increased. However, by using FSP, the mechanical properties of FSPed AA6061 and FSPed AA6061/RHA have improved compared to AA6061. This significance was due to grain refinement of AA6061 and the presence of RHA within the AA6061. It was found that wear behaviour has improved for FSPed AA6061/RHA compared to FSPed AA6061 followed by AA6061. Meanwhile, observation under a scanning electron microscope (SEM) has found that the wear mechanism changed from adhesive wear to abrasive wear. Furthermore, based on the energy-dispersive X-ray spectroscopy (EDX) remark, the presence of RHA within the AA6061 proved that RHA helps to improve the mechanical and wear behaviour of FSPed AA6061 followed by AA6061 itself

Development of a fretting-fatigue mapping concept: The effect of material properties and surface treatments

Fretting-fatigue induced by combined localized cyclic contact motion and external bulk fatigue loadings may result in premature and dramatic failure of the contacting components. Depending on fretting and fatigue loading conditions, crack nucleation and possibly crack propagation can be activated. This paper proposes a procedure for estimating these two damage thresholds. The crack nucleation boundary is formalized by applying the Crossland high cycle fatigue criterion, taking into account the stress gradient and the ensuing #size##effect#. The prediction of the crack propagation condition is formalized using a short crack arrest description. Applied to an AISI 1034 steel, this methodology allows the development of an original material response fretting-fatigue map (FFM). The impact of material properties and surface treatments is investigated

Expression profile of the chromosome 14 Microrna Cluster (C14MC) ortholog in equine maternal circulation throughout pregnancy and its potential implications

Equine chromosome 24 microRNA cluster (C24MC), the ortholog of human C14MC, is a pregnancy-related miRNA cluster. This cluster is believed to be implicated in embryonic, fetal, and placental development. The current study aimed to characterize the expression profile of this cluster in maternal circulation throughout equine gestation. The expression profile of miRNAs belonging to this cluster was analyzed in the serum of non-pregnant (diestrus), pregnant (25 d, 45 d, 4 mo, 6 mo, 10 mo), and postpartum mares. Among the miRNAs examined, 11 miRNAs were differentially expressed across the analyzed time-points. Four of these miRNAs (eca-miR-1247-3p, eca-miR-134-5p, eca-miR-382-5p, and eca-miR-433-3p) were found to be enriched in the serum of pregnant mares at Day 25 relative to non-pregnant mares. To further assess the accuracy of these miRNAs in differentiating pregnant (25 d) from non-pregnant mares, receiver operating characteristic (ROC) analysis was performed for each of these miRNAs, revealing that eca-miR-1247-3p and eca-miR-134-5p had the highest accuracy (AUCROC = 0.92 and 0.91, respectively; p &lt; 0.05). Moreover, eca-miR-1247-3p, eca-miR-134-5p, eca-miR-409-3p, and eca-miR-379-5p were enriched in the serum of Day 45 pregnant mares. Among those miRNAs, eca-miR-1247-3p and eca-miR-409-3p retained the highest accuracy as shown by ROC analysis. GO analysis revealed that these miRNAs are mainly implicated in nervous system development as well as organ development. Using in situ hybridization, we localized eca-miR-409-3p in the developing embryo (25 d) and extra-embryonic membranes (25 and 45 d). In conclusion, the present study is the first to elucidate the circulating maternal profile of C24MC-associated miRNAs throughout pregnancy and to suggest that serum eca-miR-1247-3p, eca-miR-134-5p, and eca-miR-409-3p could be used as pregnancy-specific markers during early gestation (25 and 45 d). Overall, the high abundance of these embryo-derived miRNAs in the maternal circulation suggests an embryo-maternal communication during the equine early pregnancy

Landscape of overlapping gene expression in the equine placenta

Increasing evidence suggests that overlapping genes are much more common in eukaryotic genomes than previously thought. These different-strand overlapping genes are potential sense-antisense (SAS) pairs, which might have regulatory effects on each other. In the present study, we identified the SAS loci in the equine genome using previously generated stranded, paired-end RNA sequencing data from the equine chorioallantois. We identified a total of 1261 overlapping loci. The ratio of the number of overlapping regions to chromosomal length was numerically higher on chromosome 11 followed by chromosomes 13 and 12. These results show that overlapping transcription is distributed throughout the equine genome, but that distributions differ for each chromosome. Next, we evaluated the expression patterns of SAS pairs during the course of gestation. The sense and antisense genes showed an overall positive correlation between the sense and antisense pairs. We further provide a list of SAS pairs with both positive and negative correlation in their expression patterns throughout gestation. This study characterizes the landscape of sense and antisense gene expression in the placenta for the first time and provides a resource that will enable researchers to elucidate the mechanisms of sense/antisense regulation during pregnancy

Investigation of wear performance of friction stir processed aluminium metal matrix composites

In this work the reference materials used were AA6061 Al alloy. Hence, the wear performance was to be improved by introducing friction stir processing (FSP) aluminium alloy AA6061. Furthermore, FSPed AA6061 was reinforced by rice husk ash (RHA) of 6% volume fraction. The FSP fabrication parameters used were rotation speeds at 1000rpm, 1400rpm and 1600rpm with a constant traversed speed of 25mm/min. Pin-on-disc tribometer was used to investigate the wear properties. The mass loss and specimen materials' wear rate were the final outcomes. It was found that wear properties had improved for FSPed AA6061/6vol% RHA compared to FSPed AA6061 followed by AA6061. The best result was achieved by FSPed AA6061/6vol% RHA fabricated at 1600rpm and 25mm/min, the mass loss was 0.02 g and the rate of wear is 0.97×10-3 mm3/Nm

Morphological study of friction stir processed aluminium metal matrix composites

This paper demonstrates the morphological study of friction stir processed (FSPed) aluminium metal matrix composites. Friction stir processing was implemented during fabrication process to produce metal matrix composites (MMC). The MMC consisted of aluminium alloy AA6061 and rice husk ash (RHA) particles. The morphological study compared the wear performance of as-received AA6061, FSPed AA6061 and FSPed AA6061/6vol% RHA. The result showed that the FSPed AA6061/6vol% RHA had the best wear performance among the other specimens. This was specified by less delamination, smoother worn surface and shallower grooves on this FSPed composite compared on the alloy material as presented in the scanning electron microscopy (SEM) morphological study

The effect of maturity stages on calorific values of Malayan yellow dwarf

Coconut plantation has the potential to contribute for biomass energy from its waste such as coconut husks and shells. This research aimed to determine the calorific value of coconut shells and husks at different maturity stages and its relationship with moisture content as the first step in determining their acceptability as alternative fuel sources. A bomb calorimetry procedure was performed to measure gross calorific values (GCV) which was used to indicate the potential of the samples to produce biofuels. It was found that the coconut shell had the highest calorific value of 22.36MJ/kg at maturity stage 4 (eleven to twelve months of age) followed by inner husk at 18.96MJ/kg and outer husk at 17.65MJ/kg. The relationship between the average GCV and maturity stages of the whole samples yielded the regression of R2=0.971. This result shows that the average GCV increased as the maturity stages increased. While the mean calorific value obtained from the shells was 16.38MJ/kg which was comparable to certain wood species. The coconut shells, which are generally not fully utilized, abandoned, and discarded, have the potential to be used as energy sources, whilst the husks have a lesser calorific value but could be used as fuel for less energy intensive uses