Jurnal Online STTKD (Sekolah Tinggi Teknologi Kedirgantaraan)
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Nudging Loan of Children's Books – Quasi-Experimental Evidence from a Library Book Giveaway Program
No full textLibraries play a crucial role in providing children with access to reading materials, which is essential for developing reading skills. This paper examines whether a library book giveaway program was effective in increasing parents reading investments in the form of loan of children’s books. The intervention involved “nudging” families sending out invitations to visit their local library, where their child would receive a free book and families would get introduced to library services. Using Danish individual level registry data on loan of books from public libraries, I assess the program’s impact through a difference-in-differences approach based on staggered rollout across three municipalities. Results show no increase in loan of children’s books – neither in advantaged nor disadvantaged families. Given that more intensive book giveaway programs have been successful, these results might reflect that the intervention was too mild or failed to address key barriers to participation
Optimalisasi Sistem Payroll untuk Meningkatkan Efisiensi Penggajian Karyawan di PT XYZ Menggunakan Spreadsheet
Get PDFPayroll is an administration system used to process data related to employee payroll in a company, one of which is PT XYZ. PT XYZ is a company engaged in financial technology that has a main service based on electronic payments. Currently, the payroll system at PT XYZ is still done manually using Microsoft Excel. This is inefficient because the time and energy required are greater. Therefore, a new payroll system is needed that can help HRD staff in recapitulating employee attendance for payroll needs. This research was conducted using a qualitative method, namely direct observation of one of the HRD staff who handles employee payroll. The payroll system will later be created using Spreadsheet. Based on the system that has been created, the results obtained are that the new payroll system can help HRD staff in recapitulating employee attendance optimally because the system works automatically. The use of Spreadsheets in the new payroll system can work efficiently because of its ease in saving automatically and can be worked on simultaneously
Pengaruh Persepsi Harga Tiket terhadap Keputusan Pembelian pada Maskapai di Bandar Udara Adisutjipto Yogyakarta
Get PDFPrice perception is one of the crucial things that influence purchasing decisions, but the price of Citilink tickets at Adisujipto Airport is more expensive than Yogyakarta International Airport with the same route and airline, the purpose of this study is to determine the effect of price perception on purchasing decisions where in this study using quantitative methods by distributing questionnaires to 97 samples whose data will be processed using a simple linear regression test to determine the level of influence between variables, a t test to measure significant relationships between variables, and a determination coefficient test to measure how much influence is caused. The results showed that the simple linear regression equation obtained was Y = 6.390 + 0.808X, with a correlation coefficient value of 0.808. The t test produced a t count value of 12.098> 1.984, with a significance level of 0.000 <0.05, so H1 was accepted. The results of the determination coefficient calculation show that price perception has an influence of 60.6% on purchasing decisions, while the remainder, namely 39.4%, is influenced by other variables not discussed in this study
OPTIMASI TORREFAKSI DAN PENAMBAHAN ZEOLIT UNTUK PENINGKATAN KUALITAS BIOPELET SEKAM PADI SEBAGAI BAHAN BAKAR ALTERNATIF
Get PDFThe global energy crisis necessitates the development of sustainable alternative fuels, one of which is biomass-based biopelets. Rice husks, an abundant agricultural waste, have significant potential for conversion into biopelets; however, their high moisture content can hinder combustion efficiency and storage. This study aims to evaluate the effects of torrefaction at 300°C and the addition of natural zeolite as an adsorbent on the quality of the resulting biopelets. The experimental method involves variations in rice husk particle size (60 mesh and 80 mesh) and zeolite concentrations of 0 g, 2.5 g, 5 g, and 7.5 g. The key parameters analyzed include moisture content and calorific value, measured using the gravimetric method and bomb calorimeter, respectively. The results show that torrefaction effectively reduces biopelet moisture content, with samples containing higher zeolite levels exhibiting lower moisture content. Meanwhile, calorific value decreases as zeolite concentration increases, likely due to changes in porosity and energy density. These findings highlight the need to balance moisture content and calorific value in biopelet formulation to optimize combustion performance and storage, offering promising potential for the development of renewable fuel from agricultural waste.The global energy crisis necessitates the development of sustainable alternative fuels, one of which is biomass-based biopelets. Rice husks, an abundant agricultural waste, have significant potential for conversion into biopelets; however, their high moisture content can hinder combustion efficiency and storage. This study aims to evaluate the effects of torrefaction at 300°C and the addition of natural zeolite as an adsorbent on the quality of the resulting biopelets. The experimental method involves variations in rice husk particle size (60 mesh and 80 mesh) and zeolite concentrations of 0 g, 2.5 g, 5 g, and 7.5 g. The key parameters analyzed include moisture content and calorific value, measured using the gravimetric method and bomb calorimeter, respectively. The results show that torrefaction effectively reduces biopelet moisture content, with samples containing higher zeolite levels exhibiting lower moisture content. Meanwhile, calorific value decreases as zeolite concentration increases, likely due to changes in porosity and energy density. These findings highlight the need to balance moisture content and calorific value in biopelet formulation to optimize combustion performance and storage, offering promising potential for the development of renewable fuel from agricultural waste
ANALISIS PROYEK DENGAN METODE EARNED VALUE DAN OPTIMASI BIAYA DAN WAKTU MENGGUNAKAN METODE TCTO
Get PDFIn the development of healthcare infrastructure projects, hospitals play a critical role and frequently encounter challenges in managing time and cost, including risks of delays and cost overruns. This study aims to analyze the performance of the Critical Center and Support Services Building construction project at Dr. Moewardi General Hospital Surakarta using the Earned Value Analysis (EVA) method, as well as to optimize time and cost through the Time Cost Trade Off (TCTO) method. The results of the EVA show that the project experienced schedule deviations from the initial plan. In the 16th week, the CV was Rp0,00 and CPI was 1,00, indicating that the budget aligned with the initial plan. However, the SV was (-)Rp4.474.490.995,78 and SPI was 0,84, indicating a delay in project implementation. The estimated cost to complete the project from week 16 was Rp67.574.741.112,50. A calculation in the 19th week also showed that the budget remained on track, although the project continued to experience delays. Subsequently, TCTO optimization was carried out using several alternative scenarios on critical path activities, including adding 1 hour, 2 hours, and 3 hours of overtime. Using Primavera P6 software, crash duration and crash cost were calculated for each scenario. The optimization results showed that the scenario of adding one hour of overtime was the most efficient, as it accelerated the project with an additional cost of Rp12.043.259,31 a cost efficiency of -0,013%, and a reduction in project duration by 6,05 days with a time efficiency of 3,071%. This research demonstrates that the combined application of EVA and TCTO methods can effectively support project completion on time and within a reasonable budget.Dalam pembangunan proyek infrastruktur kesehatan, peran rumah sakit sangat krusial yaitu sering menghadapi tantangan dalam pengelolaan waktu dan biaya, termasuk risiko keterlambatan dan pembengkakan anggaran. Penelitian ini bertujuan untuk menganalisis kinerja proyek pembangunan Gedung Critical Center dan Pelayanan Penunjang RSUD Dr. Moewardi Surakarta menggunakan metode Earned Value Analysis (EVA) serta mengoptimasi waktu dan biaya dengan metode Time Cost Trade Off (TCTO). Hasil analisis EVA menunjukkan bahwa proyek mengalami penyimpangan waktu dan biaya dari rencana awal. Pada minggu ke-16 didapatkan CV = Rp 0.00 dan CPI = 1,00 yang artinya anggaran sesuai dengan rencana awal, pada minggu ke-16 didapatkan SV = (-)Rp4.474.490.995,78 dan SPI = 0,84 yang artinya proyek mengalami keterlambatan. Estimasi untuk penyelesaian proyek dari minggu ke-16 adalah Rp67.574.741.112,50. Perhitungan juga dilakukan pada minggu ke-19 yang menghasilkan kesimpulan yang sama yaitu anggaran sesuai dengan rencana awal dan proyek mengalami keterlambatan. Setelah mendapat hasil perhitungan EVA kemudian dilakukan optimasi TCTO menggunakan beberapa skenario alternatif pada aktivitas di jalur kritis, yaitu penambahan 1 jam lembur, 2 jam lembur, dan 3 jam lembur. Dengan bantuan software Primavera P6, dilakukan perhitungan durasi crash dan biaya crash untuk masing-masing skenario. Hasil optimasi menunjukkan bahwa alternatif penambahan 1 jam lembur lebih efisien, karena mampu mempercepat proyek dengan penambahan biaya sebesar Rp12.043.259,31 dengan nilai efisiensi -0,013% serta pengurangan durasi sebanyak 6,05 hari dengan efisiensi 3,071%. Penelitian ini membuktikan bahwa penggunaan metode EVA dan TCTO bersamaan dapat membantu penyelesaian proyek tepat waktu dalam batas anggaran yang wajar
Analisis Kesiapan Keamanan Area Staff Security Check Point (SSCP) di Bandar Udara Adi Soemarmo - Boyolali
Get PDFThis study analyzes the readiness of the Staff Security Check Point (SSCP) at Adi Soemarmo Airport – Boyolali in ensuring aviation security. Using a descriptive qualitative method with a gap analysis approach, the research compares the actual conditions with regulatory standards regarding facility readiness, personnel availability, and SOP implementation. Data were collected through observation, interviews, and documentation during On the Job Training (OJT). The findings reveal several discrepancies, including inadequate lighting, lack of signboards, absence of X-ray equipment, insufficient personnel, and suboptimal SOP enforcement. These issues hinder the effectiveness of the current security operations. The study proposes short-term improvements such as lighting and signage enhancements, and long-term solutions including reactivation of the main SSCP and personnel additions. Stronger supervision is also recommended to ensure SOP compliance. These measures aim to align SSCP operations with national aviation security standards and minimize unlawful interference risks
Hambatan Komunikasi bagi Efektivitas Kinerja Pegawai (Studi pada Bagian Record Center DPRD Provinsi Sumatera Selatan)
Get PDFThe research method chosen is a qualitative research method using observational scientific research methods. Observation is a direct observation technique at the research site. Through observation, researchers can directly understand the context and dynamics of employee communication which is difficult to measure using quantitative methods. Observations are carried out to collect data, determine the conditions that occur, or prove the correctness of the research design which allows comprehensive qualitative data collection. Research shows that the main obstacles to communication are physical factors such as limited space and technical problems with communication tools. This disruption causes reduced employee adjustment and productivity. Improving performance efficiency requires improving communication infrastructure and related employee training
