Jurnal Online STTKD (Sekolah Tinggi Teknologi Kedirgantaraan)
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Distorted learning from local metacognition supports transdiagnostic underconfidence
No full textIndividuals experiencing symptoms of anxiety and depression have been shown to exhibit persistent underconfidence. The origin of such metacognitive biases presents a puzzle, given that individuals should be able to learn appropriate levels of confidence from observing their own performance. In two large general population samples (N = 230 and N = 278), we measure both “local” confidence in individual task instances and “global” confidence as longer run self-performance estimates while manipulating external feedback. Global confidence is sensitive to both local confidence and feedback valence – more frequent positive (negative) feedback increases (respectively decreases) global confidence, with asymmetries in feedback also leading to shifts in affective self-beliefs. Notably, however, global confidence exhibits reduced sensitivity to instances of higher local confidence in individuals with greater subclinical anxious-depression symptomatology, despite sensitivity to feedback valence remaining intact. Our finding of blunted sensitivity to increases in local confidence offers a mechanistic basis for how persistent underconfidence is maintained in the face of intact performance
Expression ambiguity leads to greater influence of predictive context during face emotion perception
No full textContext has been theoretically proposed to exert greater impact on face emotion processing when expressions are ambiguous. However, evidence for such ‘context-weighting’ as a function of expression ambiguity is very limited. We investigated the presence of context-weighting using emotive sentence cues that provided a predictive context for a neutral face that changed expression in response. Emotional expressions were either congruent or incongruent with the sentence cue. To modulate expression ambiguity we manipulated expression intensity: low (80%-intensity) and high (20%-intensity) ambiguity in Experiments 1a/b using angry and happy faces, with medium ambiguity (50%-intensity) added in Experiment 2 using disgust and sad faces. Participants categorised the face emotion. Across all experiments error rates were lower when face expressions were congruent vs. incongruent with the predictive context; crucially congruency effects were larger when expressions were more ambiguous, thus indicating greater context-weighting. Drift Diffusion Modelling revealed that this effect was underpinned by use of predictive context to improve the efficiency of face expression evidence accumulation. Our findings provide the first empirical evidence that emotion perception is based on flexible integration of both face and prior context within a predictive processing framework, with the degree of context-weighting determined by the level of expression ambiguity
Pengaruh Rasio Keuangan terhadap Pertumbuhan Laba pada Perusahaan BUMN Farmasi yang Terdaftar di Bursa Efek Indonesia
Get PDFThis research was conducted with the aim of knowing the effect of financial ratios (Current Ratio, Return on Asset, Debt to Asset Ratio, and Total Asset Turnover) on profit growth. The population taken in this study is pharmaceutical sector BUMN companies listed on the Indonesia Stock Exchange in 2020-2023. The sample method used was purposive sampling. The research sample that matches the criteria in this study is 3 companies using secondary data obtained from IDX or the company's website. The analysis technique used in this research is multiple linear analysis. The results of this study indicate that the variables Current Ratio (CR) and Return on Asset (ROA) have a significant negative effect on profit growth. While the variables Debt to Asset Ratio (DAR) and Total Asset Turnover (TATO) have no effect on profit growth
Analisis Optimalisasi Parking Stand oleh Unit Apron Movement Control (AMC) pada Saat Peak Hour di Bandar Udara Internasional I Gusti Ngurah Rai Bali
Get PDFApron movement control (amc) officers are responsible for efficiently managing aircraft parking stand in the apron, especially during peak hours to ensure smooth airport operations. This study ains to identify the factors affecting the inefficiency of pparking stands during peak hours, the challenge faced by AMC officers in optimizing parking stand usage, and the efforts undertaken to enchance parking stand management at I Gusti Ngurah Rai International Airport. This research employs a qualitative method using both primary and secondary data. Data collection techniques include interviews, observations, and documentation. Interviews were conducted with 7 AMC officers at I Gusti Ngurah Rai International Airport, categorized based on their respective roles. Observations were carried out by directly examining the conditions and management of parking stands during peak hours. Additionally, documentation was used to support data obtained from interviews and observations. The data analysis techniques include data collection, reduction, presentation, and conclusion drawing, with validation through triangulation of techniques and sources. The results showed that the obstacles that occur in optimizing parking stands during peak hour are frequent changes in parking stands so that the parking stand pattern is different from the previously made planning. The contributing factors are mismatches in aircraft arrival and departure schedules (delay departure, early arrival, late arrival), airline factors that make sudden changes, lack of coordination in delivering delay information to AMC officers. This creates challenges for AMC officers, namely having to reallocate parking stands for aircraft that experience sudden changes, each parking stand has different characteristics so that there are rules and restrictions on parking stands, limited aviobridge facilities and the prioritization of aviobridge for wide body aircraft. Some CCTVs are not available in front of the parking stand. Then the efforts made by AMC officers are to adjust the type of aircraft with parking stand characteristics, organize aircraft in certain circumstances, and parking stand management strategies during peak hours
DESAIN DAN ANALISIS CHASIS MOBIL LISTRIK 2KW TIPE TUBULAR MENGGUNAKAN SOFTWARE 3D SOLIDWORK
Get PDFThe automotive industry continues to evolve with a focus on energy efficiency and emission reduction, driving the development of electric vehicles as a sustainable transportation solution. One crucial aspect of electric vehicle design is the chassis, which serves as the primary structural support for the vehicle and its electrical system. However, selecting the optimal material remains a key challenge in ensuring safety, strength, and efficiency. This study aims to evaluate the Tubular Space Frame Chassis Design using Finite Element Analysis (FEA) in SolidWorks 2020 to analyze stress, deformation, and the factor of safety (FOS) across three primary materials: Aluminum A6061, Aluminum 6061-T6, and Plain Carbon Steel. Simulations were conducted under operational load conditions, revealing a maximum stress of 47,839 N/m² and a minimum of 4,783 N/m², indicating uniform stress distribution and resistance to excessive stress concentration. The maximum displacement of 1.55 mm and minimum of 0.15 mm demonstrates good structural rigidity, while the FOS results confirm Aluminum 6061-T6 as the most optimal material, achieving the highest FOS value of 5.7. This material selection enhances safety while maintaining a lightweight structure, contributing to improved energy efficiency in electric vehicles. Thus, this research supports advancements in robust, safe, and efficient chassis designs, providing a valuable reference for further innovations in sustainable electric vehicle development.Industri otomotif terus berkembang dengan fokus pada efisiensi energi dan pengurangan emisi, yang mendorong pengembangan kendaraan listrik sebagai solusi transportasi berkelanjutan. Salah satu aspek penting dari desain kendaraan listrik adalah sasis, yang berfungsi sebagai penopang struktural utama untuk kendaraan dan sistem kelistrikannya. Namun, memilih material yang optimal tetap menjadi tantangan utama dalam memastikan keamanan, kekuatan, dan efisiensi. Studi ini bertujuan untuk mengevaluasi Desain Sasis Rangka Ruang Tabung menggunakan Analisis Elemen Hingga (FEA) di SolidWorks 2020 untuk menganalisis tegangan, deformasi, dan faktor keamanan (FOS) pada tiga material utama: Aluminium A6061, Aluminium 6061-T6, dan Baja Karbon Biasa. Simulasi dilakukan dalam kondisi beban operasional, yang menunjukkan tegangan maksimum 47.839 N/m² dan minimum 4.783 N/m², yang menunjukkan distribusi tegangan yang seragam dan ketahanan terhadap konsentrasi tegangan yang berlebihan. Perpindahan maksimum 1,55 mm dan minimum 0,15 mm menunjukkan kekakuan struktural yang baik, sementara hasil FOS mengonfirmasi Aluminium 6061-T6 sebagai material paling optimal, yang mencapai nilai FOS tertinggi sebesar 5,7. Pemilihan material ini meningkatkan keselamatan sekaligus mempertahankan struktur yang ringan, yang berkontribusi pada peningkatan efisiensi energi pada kendaraan listrik. Dengan demikian, penelitian ini mendukung kemajuan dalam desain sasis yang kuat, aman, dan efisien, yang memberikan referensi berharga untuk inovasi lebih lanjut dalam pengembangan kendaraan listrik yang berkelanjutan.
 
Optimasi Media Pendingin untuk Meningkatkan Kekerasan Permukaan Baja Karbon Rendah melalui Proses Carburizing
Get PDFCarburizing is one of the most effective heat treatment methods to enhance the surface hardness of low-carbon steel by diffusing carbon atoms into the material's surface layer. The final characteristics of the carburized layer are strongly influenced by the quenching medium applied after the heating process. This study aims to analyze the effect of various quenching media on the microstructure and hardness of low-carbon steel specimens subjected to pack carburizing. The quenching media used include air, distilled water, and oil. Vickers hardness testing was conducted across the cross-section of the specimens, and microstructural characterization was performed using optical microscopy. The results show that air cooling produced a ferrite–pearlite structure with a diffusion layer thickness of approximately 188 µm and a hardness of 384 HV. Quenching with distilled water and oil resulted in a mixed structure of fine pearlite and partial martensite with hardness ranging from 780 to 820 HV. These findings indicate that oil is a promising alternative quenching medium for enhancing surface hardness without reducing the toughness of the core material
Strategi Pengelolaan Media Sosial Instagram @disparbudpora_bondowoso sebagai Media Komunikasi dalam Mempromosikan Wisata Kabupaten Bondowoso
Get PDFThis research is motivated by the concern of the Bondowoso Regency Government which is less concerned about Banyumas Regency in promoting one of its leading tourist attractions, namely the Ijen Crater. The Ijen Crater has been designated as part of the World Geopark. Currently, many local and foreign tourists make the Ijen Crater a tourist destination in Banyumas because it is located in two regions. The purpose of this study was first to determine the management of social media by the @disparbudpora_bondowoso account, and second to determine the impact and results of social media management in promoting tourism in Bondowoso Regency. This study uses a qualitative method. Data were collected using observation techniques, direct interviews, and documentation. The conclusion that can be drawn is that the tourism promotion strategy implemented by the Disparbudpora is quite good in providing informative and interesting content, but there are obstacles in conducting evaluations, namely that it is not optimal. The impact of the management of the Bondowoso Disparbudpora social media in promoting tourism in Bondowoso Regency can be seen from the response of followers in the comments column, likes, and the reach achieved by the @disparbudpora_bondowoso Instagram account. The result of social media management by Disparbudpora is that its followers obtain relevant and quality information
Analisis Closed Circuit Television (CCTV) Berbasis IOT dalam Mendukung Keselamatan Penerbangan di Unit Apron Movement Control (AMC) di Bandar Udara Internasional Komodo
Get PDFThis study aims to analyze the role of Closed Circuit Television (CCTV) based on the Internet of Things (IoT) in supporting flight safety at the Apron Movement Control (AMC) unit of Komodo International Airport, Labuan Bajo. This research also identifies the common obstacles encountered in implementing IoT-based CCTV systems for monitoring and aviation safety. The research uses a qualitative approach with data collected through interviews, observation, and documentation. Three informants from the AMC unit, including the Head, Junior Staff, and Officer, provided the data. The results show that IoT-based CCTV plays a crucial role in enhancing real-time surveillance, detecting operational violations, and improving response time to incidents in the apron area. This technology enables broader monitoring coverage, including hard-to-reach areas. However, some challenges still exist, such as limited camera coverage, blind spots, equipment malfunctions, and poor image quality during nighttime or adverse weather. These issues can be addressed by adding more CCTV units, conducting regular maintenance, upgrading camera quality, and providing ongoing training for personnel. It is recommended that airport management immediately improve the IoT-based CCTV system by increasing camera installations in uncovered areas, strengthening the network system, and utilizing cloud storage to support digital data processing. These improvements can enhance monitoring effectiveness and readiness for potential risks in the apron area, thereby optimizing aviation safety
Rancangan Pelaporan Security Check Point Berbasis Digital pada Unit Aviation Security (AVSEC) di BLU UPBU Kelas I Bandar Udara Aji Pangeran Tumenggung Pranoto Samarinda
Get PDFThis study addresses the inefficiencies of manual logbook reporting within the Aviation Security (Avsec) Unit at Aji Pangeran Tumenggung Pranoto Airport, Samarinda, where the existing paper-based system for daily activities, random checks, checklist patrols, and found items is hindering efficiency due to printing requirements, data vulnerability, and limited accessibility. To overcome these challenges, an innovative digital reporting system utilizing Google Spreadsheet has been implemented, allowing all Avsec personnel to input data digitally via Google Forms, with administrative access to the central spreadsheet ensuring data security and organized record-keeping. This digital transformation significantly boosts Avsec performance by streamlining data input, enhancing supervision, and improving the accuracy of activity recording for both administrators and users, thereby aligning with the core purpose of information technology to facilitate tasks and manage data swiftly and accurately for enhanced security and comfort in air travel
Review tentang Mekanisme Prosedur Kerja Berbagai Sistem Navigasi Satelit
Get PDFSatellite navigation has become an integral part of the global infrastructure for a variety of applications, from transportation navigation to earth observation and national security. Satellite navigation systems have become an important part of modern life. This system is used for various purposes, such as vehicle navigation, asset tracking, and communication. Each system has different working mechanisms and procedures. This research aims to identify the working procedures of various satellite navigation systems in the world. The research method used is a qualitative descriptive method through literature study sourced from journals, scientific articles, books and other relevant sources. The results of this research show that satellite navigation systems, such as GPS, use radio signals to determine location on the earth's surface. GPS consists of three main parts, namely control, space, and user. GPS satellites send signals that are used to determine position, speed, direction, and time. GPS has wide-ranging uses, including in ship navigation, object tracking, and management of agricultural to military supply chains