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All Journal Jurnal EduHealth Journal of Multidisciplinary Science: MIKAILALSYS
Ana Meliyana
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Environmental Science Health Professions Physics Public Health Social Sciences Veterinary Other

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Incidence of superior etremity fractures in children at Ibnu Sina hospital Makassar 2017-2022 Nurul Azizah An’naajiyyah; Jufri Latief; Evi Sulviani Gusnah; Dhedie Prasatia Sam; Ana Meliyana
Jurnal EduHealth Vol. 15 No. 01 (2024): Jurnal eduHealt, Edition January - March, 2024
Publisher : Sean Institute

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Abstract

A fracture is a disruption in the integrity of bone tissue typically resulting from external force. The upper extremity comprises five components: the shoulder, upper arm, forearm, wrist, and hand. Among these five locations, the upper arm, specifically the humerus, is the site where fractures occur most frequently, accounting for 15% of cases. This study aimed to ascertain the frequency of upper limb fractures in pediatric patients at Ibnu Sina Hospital Makassar from 2017 to 2022. The study employed descriptive methodologies with a cross-sectional design, utilizing secondary data extracted from medical records that satisfied the predefined inclusion criteria. This investigation was undertaken at Ibnu Sina Hospital Makassar from January 2017 to June 2022. The research data was acquired via direct documentation of information extracted from medical records. This study comprised a sample of 47 participants. The findings indicate that a significant proportion of the research participants were between the ages of 6 and 18 (93.62%), predominantly male (59.57%), with humerus fractures being the most common type (40.42%), and the majority of fractures being closed (89.36%).
The Impact of U.S. Trade Tariff Announcements on Stock Market Dynamics: An Analysis of Volatility, Volume, and Abnormal Returns for LQ45 Export-Oriented Companies Ana Meliyana; Nanu Hasanuh
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 2 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i2.10845

Abstract

The U.S. trade tariff policy announced in April 2025 triggered substantial turbulence in global financial markets, including the Indonesian capital market. This study aims to examine whether significant differences exist in stock price volatility, trading volume activity, and abnormal returns among export-oriented LQ45 stocks listed on the Indonesia Stock Exchange before and after the policy announcement. A quantitative approach using an event-study method was employed, with an observation window of 31 trading days from t−15 to t+15 and April 8, 2025, set as the event date. The sample consisted of 19 issuers selected through purposive sampling from the LQ45 index for the February–April 2025 period based on substantial export orientation. Data were analyzed using the Kolmogorov–Smirnov normality test to determine the appropriate difference tests, followed by the Wilcoxon Signed-Rank Test for stock price volatility and average abnormal return (AAR), and the Paired Sample t-Test for trading volume activity (TVA). The findings show that stock price volatility increased significantly by 31.9% after the announcement (p = 0.002), while TVA increased by 52.1% with the highest level of statistical significance (p = 0.000). In contrast, the difference in AAR before and after the announcement was not statistically significant (p = 0.570), reflecting the systemic nature of the shock, in which individual stock movements and market index movements occurred simultaneously. These findings support the relevance of semi-strong form market efficiency and Signaling Theory in emerging capital markets. This study concludes that trading volume and volatility provide stronger signals of market stress than abnormal returns during systemic policy shocks. The findings contribute to the event-study literature on emerging markets and offer practical implications for regulators and investors in monitoring market responses to external trade policy shocks.
Co-Authors Dhedie Prasatia Sam Evi Sulviani Gusnah Jufri Latief Nanu Hasanuh Nurul Azizah An’naajiyyah