Reaksi pasar modal Indonesia terhadap peristiwa virus Corona

This research uses the event study analysis method (evet study), the research period used for 44 days with the observation period used in this study is t-3 (the day before the announcement) and t + 3 (the day after the announcement) coronavirus events enter Indonesia. The sample in this study focused on the CSPI during the observation period in the form of daily stock price closing data. The events examined were non-economic events, namely the Coronavirus or covid 19 that affected the capital market. The population in this study are all companies listed on the IDX on the LQ45 index. The sampling technique in this study uses accidental sampling. In accidental sampling that is the determination of samples based on coincidence or anyone who happens to meet with researchers can be used with samples and sampling is not determined in advance, so researchers simply collect data from sampling units that are met or already exist.

Sampling and fieldwork practices in Europe: Analysis of methodological documentation from 1,537 surveys in five cross-national projects, 1981-2017

This article addresses the comparability of sampling and fieldwork with an analysis of methodological data describing 1,537 national surveys from five major comparative cross-national survey projects in Europe carried out in the period from 1981 to 2017. We describe the variation in the quality of the survey documentation, and in the survey methodologies themselves, focusing on survey procedures with respect to: 1) sampling frames, 2) types of survey samples and sampling designs, 3) within-household selection of target persons in address-based samples, 4) fieldwork execution and 5) fieldwork outcome rates. Our results show substantial differences in sample designs and fieldwork procedures across survey projects, as well as changes within projects over time. This variation invites caution when selecting data for analysis. We conclude with recommendations regarding the use of information about the survey process to select existing survey data for comparative analyses.

Interviewing the musical sample

Digital technologies and Musical Instrument Digital Interface-sampled instruments have emerged as one of the most significant technological shifts in musical consciousness in western society. Digital music has introduced new epistemologies of music as it raises questions of authorship and creativity, while also challenging the ontological presumptions about what it means to be a musician. Through interviewing the sample by applying various posthuman heuristics, I explore my own relationship to digital music samples and sampling technology as a composer and musician. I engage in a phenomenological inquiry that surveys the various ways the sample affects my ecological milieu of music-making, and more broadly, I explore how a musician is at all times enacting an intra/actional relationship as negotiated between themselves and their instrument.

Supplemental Material: Tectonic origin of the Bainaimiao arc terrane in the southern Central Asian orogenic belt: Evidence from sedimentary and magmatic rocks in the Damao region

Table S1: Summary of the samples and sampling positions in this study (sampling sites are marked in Fig. 3); Table S2: U-Pb age data for zircons of (meta-)sedimentary and volcanic rocks in this study; Table S3: Lu-Hf isotopic data for zircons of (meta-)sedimentary and volcanic rocks in this study.

Supplemental Material: Tectonic origin of the Bainaimiao arc terrane in the southern Central Asian orogenic belt: Evidence from sedimentary and magmatic rocks in the Damao region

Table S1: Summary of the samples and sampling positions in this study (sampling sites are marked in Fig. 3); Table S2: U-Pb age data for zircons of (meta-)sedimentary and volcanic rocks in this study; Table S3: Lu-Hf isotopic data for zircons of (meta-)sedimentary and volcanic rocks in this study.

Fish movement patterns in a Neotropical free-flowing tributary located downstream from a large dam

In dammed rivers, the conservation of free-flowing tributaries is considered an important strategy to mitigate the negative effects of the dam on fish communities. In this study, we evaluated the importance of a free-flowing tributary of a dammed river as a reproductive migration route. From August 2012 to July 2013, hydroacoustics data were collected alongside active fish sampling using cast nets and ichthyoplankton nets in the São Francisco and Abaeté rivers. Cast net sampling captured 738 individuals and hydroacoustics detected 42196 fishes. In almost all samples and sampling sites, preferential movements to the Abaeté River and the main São Francisco River were observed. The increase in the flow rate of the Abaeté coincided with a greater incidence of fish movements to upstream areas of the tributary. A higher density and proportion of larger fishes, as well as a higher density of ichthyoplankton, were observed in the Abaeté River compared with the main river. Because this tributary is an alternative route for migratory fishes, its protection is essential for fish conservation and therefore maintenance of local fisheries