http://repository.matanauniversity.ac.id:8080/xmlui/123456789/100 2026-10-14T09:38:40Z 2026-10-14T09:38:40Z Wiranata, Alfonsus Grandy Yudistira, Rahmania Indrianti Nata, Juan http://repository.matanauniversity.ac.id:8080/xmlui/123456789/1690 2026-09-25T03:08:43Z 2026-01-01T00:00:00Z

Strategi Desain Pasif untuk Efisiensi Energi pada Bangunan Rumah Tinggal Bertingkat Rendah di Lahan Sempit Perkotaan Wiranata, Alfonsus Grandy; Yudistira, Rahmania Indrianti; Nata, Juan Global warming has triggered weather anomalies that have extended the duration of human activity indoors. This has led to a surge in the use of artificial lighting and ventilation. This phenomenon has a significant impact on low-rise house typologies located on narrow urban plots, where limited site area and physical obstructions from surrounding buildings often create dark and stifling spaces, ultimately leading to energy wastage. This research aims to formulate effective passive design strategies to maximize natural lighting and ventilation in order to achieve energy efficiency on constrained sites. This qualitative study employs a descriptive-analytical approach using a single-case study method. Data were collected through literature reviews and direct observation of the design implementation in a three floors house in the urban area of Tangerang. The research findings formulate eight passive design strategies that have been implemented in practice, categorized into vertical and horizontal scopes of influence. These eight strategies demonstrate that energy efficiency in urban dwellings on narrow plots can be achieved through precise architectural engineering based on the performance evaluation of the built environment.

2026-01-01T00:00:00Z Samaliwu, Evelin Trivena Illya, Gregoria http://repository.matanauniversity.ac.id:8080/xmlui/123456789/1689 2026-08-31T09:29:27Z 2025-07-31T00:00:00Z

Evaluation of noise values and homogenity of CT scan image results on head phantom after daily calibration Samaliwu, Evelin Trivena; Illya, Gregoria Evaluation of CT scan image quality is a crucial aspect in ensuring accurate medical diagnosis. This research aims to evaluate noise values and image homogeneity of CT scans on a head phantom after daily calibration. Evaluation of these two parameters is critical because high noise can interfere with image contrast and lead to clinical misinterpretation, while low homogeneity may indicate artifacts or system inconsistencies that potentially reduce diagnostic reliability. Measurements were performed using Region of Interest (ROI) at five points (one in the center and four at the edges at 12, 3, 6, and 9 o'clock positions) across six image slices, for both head and body modes. The CT scan system used was Siemens SOMATOM go.Top, with primary scanning parameters for each mode: 120 kV voltage, 265 mA current (head) and 220 mA (body), as well as Hr40f and Br40f kernels. Research results show that the CT number homogeneity values in head mode ranged from -1.96 to 0.81 HU, and in body mode from -1.78 to 1.28 HU; all were within the tolerance limit of 0 ± 4 HU. Noise values for head mode ranged from 3.49 – 3.67 HU and body mode from 4.98 – 5.37 HU, also within standard tolerance limits. These findings indicate that the CT scan system functions properly and meets diagnostic imaging quality standards. Additionally, these results support the importance of implementing periodic quality control as part of improving radiological service quality and strengthening patient safety standards in medical facilities

2025-07-31T00:00:00Z Illya, Gregoria Sutanto, Hadi http://repository.matanauniversity.ac.id:8080/xmlui/123456789/1688 2026-08-31T09:23:09Z 2026-08-31T00:00:00Z

Composition-Dependent Structural and Dynamical Properties of Mixed DPPC/DLPC Bilayers: An Atomistic Molecular Dynamics Study Illya, Gregoria; Sutanto, Hadi Moderate chain-length mismatch in saturated lipid mixtures provides a useful model for understanding how structural perturbations influence membrane behavior. Here, all-atom molecular dynamics simulations were used to investigate DPPC/DLPC bilayers across compositions at 50 °C, focusing on the coupled evolution of structure, dynamics, and hydration. Increasing DLPC content leads to a systematic increase in area per lipid and a reduction in bilayer thickness, indicating weakened packing within the hydrophobic core. These structural changes are accompanied by enhanced interleaflet coupling and decreased acyl-chain ordering. The lateral diffusion behavior is composition-dependent: DLPC mobility increases steadily with concentration, whereas DPPC exhibits a non-monotonic trend, reflecting competing effects of increased free volume and heterogeneous packing. Mean squared displacement analysis in log–log representation reveals persistent subdiffusive dynamics for both lipid species, with diffusion exponents α ≈ 0.30–0.35 across all compositions. This indicates that lipid motion remains governed by transient confinement and spatial heterogeneity, even as overall mobility increases. In parallel, water density profiles show enhanced penetration of water into the bilayer interior with increasing DLPC fraction, driven by packing defects and increased free volume rather than pore formation. These results demonstrate that moderate chain-length mismatch induces a coupled structural and dynamical response that governs membrane transport properties

2026-08-31T00:00:00Z Simamora, Vera Inne Juni Nando, Felix Lawrence, Jennifer http://repository.matanauniversity.ac.id:8080/xmlui/123456789/1656 2026-08-12T07:53:24Z 2026-01-01T00:00:00Z

Implementation of Community-Based Tourism As Sustainable Tourism Development Strategy on Pari Island, Seribu Islands Simamora, Vera Inne Juni; Nando, Felix; Lawrence, Jennifer The achievement of long-term tourism sustainability requires active participation from local communities, particularly through Community-Based Tourism (CBT) implementation, which can generate benefits across economic, socio-cultural, and environmental dimensions. Although Pari Island has significant marine tourism potential, the implementation still faces various challenges, particularly regarding institutional frameworks, community participation, and environmental management. This research analyzes the implementation of Community-Based Tourism (CBT) on Pari Island across economic, environmental, and socio-cultural dimensions, and identifies forms of government support for CBT. A qualitative approach utilizing descriptive methods was adopted. Informants comprised tourism business actors, administrators of Tourism Awareness Groups (Pokdarwis), community leaders, and local government representatives, all selected through purposive sampling. Data were obtained from several sources, including in-depth interviews, field observations, and relevant documentation. The data were then systematically interpreted using a thematic analysis approach. The results demonstrate that the economic dimension is the most developed aspect of community-based tourism (CBT), as shown by community participation in diverse tourism enterprises that increase income and create employment opportunities. In contrast, the socio cultural and environmental dimensions remain underdeveloped due to limited collective community participation, weak local institutions, insufficient stakeholder collaboration, and low community engagement in environmental management. Government support has been provided through facilities, training, and sanitation management, but lacks sustained institutional backing. These results highlight the necessity of strengthening community institutions, fostering multi-stakeholder collaboration, and advancing community-based environmental management to enhance CBT implementation and promote sustainable tourism development on Pari Island.

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