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"Penelitian ini mempresentasikan langkah-langkah desain dan perhitungan untuk setiap unit instalasi pengolahan air (IPA), karena perannya yang sangat penting untuk keperluan rumah tangga dan air minum. Itu juga menggambarkan dan merancang prosedur unit pengolahan air dengan memperkirakan kebutuhan air dan merancang unit proses. Tujuan dari pekerjaan ini adalah untuk mengevaluasi kebutuhan air untuk masyarakat tertentu dan untuk menyajikan langkah-langkah desain dan perhitungan untuk unit IPA yang dibutuhkan. Rancangan unit IPA secara teoritis akan diterapkan pada Danau Salam untuk didistribusikan sebagai air minum di lingkungan Universitas Indonesia. Kualitas dan kuantitas air Danau Salam pada berbagai waktu dianalisis dan disajikan secara statistik. Unit-unit proses pengolahan meliputi asupan, koagulasi, flokulasi, sedimentasi, adsorpsi, filtrasi, desinfeksi, penyimpanan, dan pemompaan. Perhitungan dan gambar detail unit ditampilkan, debit rata-rata dan populasi yang digunakan untuk desain IPA dihitung masing-masing. Selain itu, perhitungan tersebut memerlukan beberapa parameter untuk diestimasi sebagai data lapangan yang dijadikan asumsi. Hasil garis besar setiap unit IPA ditabulasikan. Dapat disimpulkan bahwa pekerjaan ini dapat digunakan sebagai sumber untuk perancangan unit IPA lainnya. Sejumlah faktor seperti usia IPA, pemeliharaan, analisis ekonomi, investasi desain, dan kebutuhan air berdampak besar pada efisiensi penyisihan unit IPA.

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This research presented the design steps and calculation for each unit of the water treatment plant (WTP), due to its crucial role domestically and drinking purpose. It also illustrated and designed the procedures of the water processing units by estimating water demand and designing the unit process. The objectives of this work were to evaluate the water demand for a certain community and to present design steps and calculations for the required units of a WTP. The design of the WTP units was theoretically going to be applied to Lake Salam to be distributed as a drinking water in University of Indonesia’s Environment. The quality and quantity of the Lake Salam water at various times were statistically analyzed and presented. The units of the treatment processes involved intake, coagulation, flocculation, sedimentation, adsorption, filtration, disinfection, storage, and pumping. The calculations and detailed drawings of the units were displayed, the average discharge and population used for the WTP design were calculated respectively. Besides, the calculation required some of the parameters to be estimated as field data, which were taken into assumptions. The outline results of e ach unit of the WTP were tabulated. It can be concluded that this work can be used as a source for designing other WTP units. A number of factors such as the age of WTP, maintenance, economic analysis, design infestation, and water demand had a great impact on the removal efficiency of the WTP units."

"Survei yang diselenggarakan Mckinsey dan Company melaporkan bahwa per Mei 2022, sebanyak 26% masyarakat Indonesia mulai aktif melakukan aktivitas fisik, 32% sudah secara rutin beraktivitas fisik, dan 9% berolahraga dengan lebih intens. Revolusi Industri 4.0 membuat aplikasi fitness yang digunakan untuk melacak performa olahraga masyarakat berkembang secara pesat. Meskipun demikian, minat masyarakat untuk menggunakan aplikasi fitness dalam jangka waktu yang lama masih tergolong rendah. Oleh karena itu, penelitian ini bertujuan untuk mengetahui pengaruh insentif pada aplikasi fitness (self-monitoring, social support, platform rewards, dan external influence) terhadap niat continuance usage intention pengguna dengan menggunakan efek moderasi jenis kelamin. Penelitian ini menggunakan metode mixed method dan untuk penelitian kuantitatif dilakukan menggunakan data yang didapatkan dari kuesioner daring dengan total 379 responden valid. Kemudian, data tersebut diolah menggunakan software IBM Amos 26 dengan metode Covariance-Based Structural Equation Modeling. Penulis juga melakukan penelitian kualitatif yaitu wawancara terhadap 30 narasumber pengguna aplikasi fitness dan mengolahnya menggunakan thematic analysis. Hasil analisis data menunjukkan bahwa tiga insentif (self-monitoring, platform rewards, dan external influence) kecuali social support berpengaruh terhadap perceived usefulness pengguna aplikasi. Selain itu, jenis kelamin juga terbukti berpengaruh terhadap perilaku pengguna untuk meningkatkan aktivitas fisik mereka. Penelitian ini menunjukkan bahwa perempuan lebih cenderung termotivasi untuk olahraga karena fitur sosial dan eksternal, sedangkan laki-laki lebih memperhatikan fitur tracking dan challenges atau rewards. Berdasarkan hasil penemuan tersebut, penelitian ini diharapkan dapat berkontribusi dalam bidang mHealth dan memberikan wawasan bagi para pengembang aplikasi kebugaran dan bermanfaat dalam perkembangan fasilitas olahraga digital di Indonesia.

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A survey conducted by McKinsey and Company revealed that, as of May 2022, 26% of Indonesians have become more active physically, while 32% have established a routine for physical activity, and 9% have intensified their exercise regimen. The rapid development of fitness applications, driven by the Industrial Revolution 4.0, has allowed for the tracking of individuals' athletic performance. However, the long-term adoption of fitness applications among the general population remains relatively low. Consequently, the aim of this research is to examine the impact of incentives (self-monitoring, social support, platform rewards, and external influence) on users' Continuance Usage Intention within fitness applications, with a focus on the moderating effect of gender. The study employs a quantitative approach, utilizing data obtained from a web-based questionnaire administered to a sample of 379 valid respondents. The data is then analyzed using the Covariance-Based Structural Equation Modeling method through IBM Amos 26 software. Additionally, qualitative research was conducted, involving interviews with 30 fitness application users, to gather unique insights pertaining to the proposed hypotheses. The findings indicate that self-monitoring, platform rewards, and external influence significantly influence users' perceived usefulness of the fitness application. Moreover, gender is shown to have a significant influence on user behavior in increasing their physical activity. Specifically, the research demonstrates that females tend to be more motivated to engage in physical activity due to social and external features, whereas males show greater attention to tracking functionalities and challenges or rewards. The result of this research is expected to contribute to the mHealth industry and help mobile fitness app developers to improve the digital exercise facilities'in Indonesia."

"Survei yang diselenggarakan Mckinsey dan Company melaporkan bahwa per Mei 2022, sebanyak 26% masyarakat Indonesia mulai aktif melakukan aktivitas fisik, 32% sudah secara rutin beraktivitas fisik, dan 9% berolahraga dengan lebih intens. Revolusi Industri 4.0 membuat aplikasi fitness yang digunakan untuk melacak performa olahraga masyarakat berkembang secara pesat. Meskipun demikian, minat masyarakat untuk menggunakan aplikasi fitness dalam jangka waktu yang lama masih tergolong rendah. Oleh karena itu, penelitian ini bertujuan untuk mengetahui pengaruh insentif pada aplikasi fitness (self-monitoring, social support, platform rewards, dan external influence) terhadap niat continuance usage intention pengguna dengan menggunakan efek moderasi jenis kelamin. Penelitian ini menggunakan metode mixed method dan untuk penelitian kuantitatif dilakukan menggunakan data yang didapatkan dari kuesioner daring dengan total 379 responden valid. Kemudian, data tersebut diolah menggunakan software IBM Amos 26 dengan metode Covariance-Based Structural Equation Modeling. Penulis juga melakukan penelitian kualitatif yaitu wawancara terhadap 30 narasumber pengguna aplikasi fitness dan mengolahnya menggunakan thematic analysis. Hasil analisis data menunjukkan bahwa tiga insentif (self-monitoring, platform rewards, dan external influence) kecuali social support berpengaruh terhadap perceived usefulness pengguna aplikasi. Selain itu, jenis kelamin juga terbukti berpengaruh terhadap perilaku pengguna untuk meningkatkan aktivitas fisik mereka. Penelitian ini menunjukkan bahwa perempuan lebih cenderung termotivasi untuk olahraga karena fitur sosial dan eksternal, sedangkan laki-laki lebih memperhatikan fitur tracking dan challenges atau rewards. Berdasarkan hasil penemuan tersebut, penelitian ini diharapkan dapat berkontribusi dalam bidang mHealth dan memberikan wawasan bagi para pengembang aplikasi kebugaran dan bermanfaat dalam perkembangan fasilitas olahraga digital di Indonesia.

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A survey conducted by McKinsey and Company revealed that, as of May 2022, 26% of Indonesians have become more active physically, while 32% have established a routine for physical activity, and 9% have intensified their exercise regimen. The rapid development of fitness applications, driven by the Industrial Revolution 4.0, has allowed for the tracking of individuals' athletic performance. However, the long-term adoption of fitness applications among the general population remains relatively low. Consequently, the aim of this research is to examine the impact of incentives (self-monitoring, social support, platform rewards, and external influence) on users' Continuance Usage Intention within fitness applications, with a focus on the moderating effect of gender. The study employs a mixed method approach by utilizing quantitative data obtained from a webbased questionnaire administered to a sample of 379 valid respondents. The data is then analyzed using the Covariance-Based Structural Equation Modeling method through IBM Amos 26 software. Additionally, qualitative research was conducted, involving interviews with 30 fitness application user and was further analyzed using thematic analysis. The findings indicate that self-monitoring, platform rewards, and external influence significantly influence users' perceived usefulness of the fitness application. Moreover, gender is shown to have a significant influence on user behavior in increasing their physical activity. Specifically, the research demonstrates that females tend to be more motivated to engage in physical activity due to social and external features, whereas males show greater attention to tracking functionalities and challenges or rewards. The result of this research is expected to contribute to the mHealth industry and help mobile fitness app developers to improve the digital exercise facilities' quality in Indonesia."

"In this paper, we analyze the empirical relationship between stock return and trading volumebased on stock market cycles. Using daily data for Jakarta Composite Index (JCI) closing price andtrading volume from 2010 to 2014, we identify the bull and bear phases, then we analyze the return–volume relationship in both contemporaneous and dynamic context. We find that (1) there is a positivecontemporaneous return–volume relationship in both bull and bear markets, which is only significantin bull markets; (2) no evidence of asymmetry in contemporaneous relationship is found; and (3)there exists a positive unidirectional causality from stock return to trading volume. Our research hastwo implications. First, in the bull market, overconfidence may grow with long-lasting past successand there is also momentum or positive feedback trading. Second, stock return is able to forecasttrading volume. In addition, our findings are robust for different sample period and data frequency."