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This study aims to analyze the effect of Digital visual marketing and Service Innovation, both partially and simultaneously, on the decision to rent Sikka traditional clothing at Meliana Collection. The background of this research is based on the unstable fluctuations in the number of rental transactions at the object of research, so a strategy is needed that can increase consumer appeal, especially through strengthening visual-based digital marketing and improving service quality. This study uses a quantitative approach with causal associative methods. The population in this study consists of all consumers who have rented traditional clothing at Meliana Collection. Determination of the number of samples was carried out using a probability sampling technique with the Slovin formula at a 10% error level, resulting in 88 respondents as the research sample. Data were collected through the distribution of questionnaires and further analyzed using descriptive analysis, classical assumption tests, multiple linear regression analysis, and hypothesis testing (t-test and F-test) using SPSS version 23 software. The results of the research partially (t-test) show that the Digital visual marketing variable has a positive and significant effect on rental decisions (t-count 2.955> 1.988; Sig 0.004). The Service Innovation variable also has a positive and significant effect on rental decisions and is proven to be the most dominant variable influencing consumer decisions (t-count 11.386 > 1.988; Sig 0.000). Simultaneously (F-test), the two independent variables have a significant combined effect on consumer rental decisions (F-count 77.606>2.71; Sig 0.000). The combination of the Digital visual marketing and Service Innovation variables contributes 64.6% (R Square 0.646) to rental decisions, while the remaining 35.4% is influenced by other factors or variables outside of this research model.

This study aims to determine and analyze the effect of entrepreneurial knowledge and entrepreneurial skills on business success in Micro, Small, and Medium Enterprises (MSMEs) in Aesesa District, Nagekeo Regency. The background of this research is driven by fluctuations in MSME performance, unstable turnover, suboptimal management, low customer satisfaction, and limited practical skills and knowledge. This study utilizes a quantitative approach with a causal associative method. The population consists of all 3,705 active MSMEs in Aesesa District. The sampling technique used was purposive sampling with specific criteria, and the sample size was calculated using the Slovin formula with a 10% margin of error, resulting in exactly 100 respondents. Data collection was conducted via structured questionnaires with a 1–5 Likert scale. Data analysis techniques include descriptive statistics, validity and reliability tests, classical assumption tests (multicollinearity, heteroscedasticity, and normality), multiple linear regression analysis, t-test, F-test, and coefficient of determination administered through SPSS. The multiple linear regression analysis yielded the equation Y = 12.450 + 0.412X1 + 0.385X2. The partial test (t-test) demonstrates that entrepreneurial knowledge has a positive and significant effect on business success (t count 4.120 > t table 1.984, sig 0.000). Entrepreneurial skills also exert a positive and significant impact on business success (t count 3.850 > t table 1.984, sig 0.000). Simultaneously (F-test), entrepreneurial knowledge and entrepreneurial skills have a significant combined effect on business success with F count 38.450 > F table 3.09. The coefficient of determination (Adjusted R Square) value of 0.442 indicates that the variation in business success is influenced by both independent variables by 44.2%, while the remaining 55.8% is explained by external factors outside this research model.

Malnutrition among children under five remains a major public health concern, particularly in areas with limited access to nutritious food and health services. This study aimed to determine the prevalence of stunting, underweight, and wasting among children under five in Kuatnana District, South Central Timor Regency in 2025. This research used a descriptive cross-sectional design with secondary data obtained from nutrition program reports at Tetaf Public Health Center. The sample included all children aged 0–59 months, totaling 1,179 children. Data were analyzed using univariate analysis to calculate frequency distribution and percentages based on WHO anthropometric indicators (z-score). The results showed that the prevalence of stunting was 44.78%, underweight 40.46%, and wasting 14.76%. Most children had normal nutritional status based on weight-for-height index (88.38%), although a considerable proportion still experienced undernutrition. In conclusion, malnutrition among children under five in Kuatnana District remains high, particularly stunting and underweight. Integrated interventions are needed, including improving caregiving practices, increasing access to nutritious food, and strengthening health services to reduce malnutrition sustainably.

This study examines the politeness strategies used in interactions among sisters in Louisa May Alcott’s novel Little Women. Using Brown and Levinson’s (1987) politeness theory as an analytical framework, this study identifies and classifies the forms of politeness strategies that emerge in the conversations of the four main characters: Meg, Jo, Beth, and Amy March. The research data consists of dialogic utterances purposively selected from the novel’s text. The results indicate that all four politeness strategies on record, positive politeness, negative politeness, and off record are present in the interactions among the sisters, with positive politeness being the most dominant. The dominance of this strategy reflects the closeness of their relationship, solidarity, and mutual respect among the characters. Additionally, the choice of politeness strategies is also influenced by factors such as social distance, age differences, and situational context. This study contributes to the understanding of language use in a literary context, particularly in depicting the dynamics of family relationships through character interactions.

Diabetes mellitus, as a persistent non-infectious metabolic pathology increasingly prominent in the global epidemiological spectrum, is fundamentally characterized by dysfunctional hyperglycemia rooted in primary disruptions of pancreatic insulin hormone synthesis or peripheral resistance to its biological action, thereby inducing dynamic imbalances in gluconeogenesis and glycolysis pathways; amid the hypothesis that body mass index (BMI) as a measure of central adiposity potentially mediates variability in serum glucose levels, this quantitative observational study with a cross-sectional design rigorously tests the causal relationship between BMI and fasting/random blood glucose concentrations in a cohort of 134 adult subjects with type 2 diabetes mellitus affiliated with primary care services at Puskesmas Bongo II, Boalemo Regency, through an inclusive total sampling recruitment strategy, precision anthropometric measurement instruments (height, weight, WHO BMI categorization), and laboratory-validated glucometric validation, with multivariate inferential processing based on the Chi-Square independence test at a Type I error rate of α=0.05 using the latest edition of the SPSS analytical suite; the demographic profile highlights female gender supremacy (90 individuals, 67.2%), the normoweight group (78 cases, 58.2%), concurrent with substantial glycemic elevation prevalence (78 subjects, 58.2%), but the crucial statistical output reveals a p-value of 0.831 (>0.05) that negates any probabilistically meaningful association, thus the substantive conclusion affirms the non-significance of the BMI-glucose relationship in this local context, while implying the dominance of alternative etiopathogenic factors such as hypercaloric macronutrient intake patterns, deficits in aerobic/anaerobic physical activity, non-adherence to multidisciplinary pharmacological protocols (e.g., metformin/oral hypoglycemics), and a comprehensive management paradigm integrating behavioral education, continuous monitoring, and personalized interventions to mitigate long-term cardiovascular risks across the diabetes mellitus spectrum.

Diabetes mellitus, as a persistent non-infectious metabolic pathology increasingly prominent in the global epidemiological spectrum, is fundamentally characterized by dysfunctional hyperglycemia rooted in primary disruptions of pancreatic insulin hormone synthesis or peripheral resistance to its biological action, thereby inducing dynamic imbalances in gluconeogenesis and glycolysis pathways; amid the hypothesis that body mass index (BMI) as a measure of central adiposity potentially mediates variability in serum glucose levels, this quantitative observational study with a cross-sectional design rigorously tests the causal relationship between BMI and fasting/random blood glucose concentrations in a cohort of 134 adult subjects with type 2 diabetes mellitus affiliated with primary care services at Puskesmas Bongo II, Boalemo Regency, through an inclusive total sampling recruitment strategy, precision anthropometric measurement instruments (height, weight, WHO BMI categorization), and laboratory-validated glucometric validation, with multivariate inferential processing based on the Chi-Square independence test at a Type I error rate of α=0.05 using the latest edition of the SPSS analytical suite; the demographic profile highlights female gender supremacy (90 individuals, 67.2%), the normoweight group (78 cases, 58.2%), concurrent with substantial glycemic elevation prevalence (78 subjects, 58.2%), but the crucial statistical output reveals a p-value of 0.831 (>0.05) that negates any probabilistically meaningful association, thus the substantive conclusion affirms the non-significance of the BMI-glucose relationship in this local context, while implying the dominance of alternative etiopathogenic factors such as hypercaloric macronutrient intake patterns, deficits in aerobic/anaerobic physical activity, non-adherence to multidisciplinary pharmacological protocols (e.g., metformin/oral hypoglycemics), and a comprehensive management paradigm integrating behavioral education, continuous monitoring, and personalized interventions to mitigate long-term cardiovascular risks across the diabetes mellitus spectrum.

Student dropout in higher education remains a persistent socioeconomic challenge, yet many predictive models reported in the literature are methodologically compromised by randomized cross-validation schemes that introduce temporal data leakage and artificially inflate predictive performance. This study proposes a longitudinal prescriptive learning analytics framework integrating three complementary methodological components: a Leave-One-Cohort-Out (LOCO) temporal validation protocol, a hybrid SMOTE-ENN class balancing strategy, and temporal velocity feature engineering derived from Learning Management System (LMS) behavioral trajectories. The framework was evaluated on a longitudinal dataset comprising 464,739 enrollment records and 77 features. Five predictive algorithms—XGBoost, LightGBM, CatBoost, Random Forest, and Logistic Regression—were comparatively assessed on a strictly isolated blind holdout cohort (2022), with CatBoost emerging as the champion estimator, achieving a PR-AUC of 0.8859, a Macro F1-Score of 0.9143, and the lowest Brier Score (0.0221), thereby demonstrating superior calibration and discriminative capability under severe class imbalance (93:7 ratio). Comprehensive ablation analysis revealed that temporal velocity features function not merely as additive predictors, but as a structural prerequisite enabling Synthetic Minority Oversampling Technique with Edited Nearest Neighbors (SMOTE-ENN) to generate high-quality synthetic boundary instances; removing these features reduced minority-class precision from 0.8302 to 0.6721. To operationalize predictive outputs into actionable intervention pathways, Diverse Counterfactual Explanations (DiCE) were implemented under a three-tier causal constraint architecture on 96 borderline high-risk students, generating 384 feasible intervention scenarios exclusively targeting forward-looking behavioral velocity metrics without constraint violations. Collectively, these findings advance the paradigm of prescriptive learning analytics by providing educational institutions with interpretable risk diagnostics and operationally feasible intervention guidance grounded in empirically validated behavioral and temporal dynamics.

The development of transportation technology encourages companies to improve vehicle monitoring systems to be more effective and measurable, particularly in addressing speeding violations that can increase accident risks and reduce operational efficiency. This study aims to analyze the implementation and effectiveness of using a buzzer integrated with the Teltonika FMB910 GPS module as a vehicle speed warning indicator at PT. Lacak Cipta Aktual. This research employs a qualitative descriptive method with a case study approach, where data were collected through observation, interviews, and documentation during a one-month industrial internship and analyzed using the Miles and Huberman model, including data reduction, data presentation, and conclusion drawing. The results show that the system is capable of detecting overspeed conditions and automatically activating the buzzer when the vehicle speed exceeds the predefined threshold of 80 km/h. Based on logbook data, the system achieved a success rate of 93.9% in responding to overspeed conditions. The use of a buzzer is proven effective in providing immediate warnings to drivers, thereby improving driver awareness and speed control. However, the system still has limitations, particularly its dependence on GPS signal stability and vehicle electrical conditions. Overall, this study demonstrates that the integration of GPS and a buzzer provides a simple, effective, and cost-efficient solution to enhance driving safety and fleet management efficiency.

Chronic kidney disease is a progressive disease requiring long-term hemodialysis therapy that may cause physical, psychological, social, and spiritual problems. Patients undergoing hemodialysis often experience spiritual distress due to changes in health conditions and dependence on therapy. This study aimed to determine the relationship between the duration of hemodialysis and the level of spiritual distress in chronic kidney disease patients at the Hemodialysis Unit of Baiturrahim Hospital Jambi. This study used a quantitative design with a cross sectional approach. The sample consisted of 57 respondents selected using a purposive sampling technique. The research instrument used a spiritual distress questionnaire that had been tested for validity and reliability with a Cronbach’s Alpha value of 0.955. Data were analyzed using the Chi-Square test with a significance level of 0.05. The results showed that most respondents underwent hemodialysis for ≥12 months, totaling 39 respondents (68.4%), and the majority experienced moderate spiritual distress, totaling 20 respondents (35.1%). Statistical analysis showed a p-value of 0.030 (p<0.05), indicating a significant relationship between the duration of hemodialysis and the level of spiritual distress in chronic kidney disease patients. The longer patients undergo hemodialysis, the lighter the spiritual distress tends to be because patients gradually adapt to their disease condition and therapy.

This study is motivated by the importance of understanding the visual characteristics of drawings produced by children aged 10–11 years within the context of non-formal learning. Children’s drawings not only represent objects but also reflect stages of visual development and learning experiences. This research draws upon theories of children’s artistic development and visual analysis in fine arts. The study employs a descriptive qualitative method with a visual analysis approach. The subjects consist of children aged 10–11 years who participate in private drawing lessons. Data were collected through observation, documentation of students’ artworks, and brief interviews with the instructor. The findings indicate that variations in drawing outcomes are influenced by the duration of learning, practice habits, and the teaching methods applied. Furthermore, the study reveals that children’s ability to produce simple realistic drawings is shaped by their learning experiences and instructional guidance during the learning process, resulting in diverse visual characteristics that remain within a developmental stage.

The use of synthetic pesticides in the agricultural sector remains the primary choice for farmers in Indonesia due to their high effectiveness, but their massive use has negative impacts on human health and the environment. Therefore, there is a need for environmentally friendly and sustainable pesticide innovations. Red onion peel waste with the addition of TiO₂ nanotechnology is a strategic development step as a solution to the dangers of synthetic pesticides. Red onion peel contains bioactive compounds such as acetogenin, squamocin, gibberellin, cytokinin, and abscisic acid, which have the potential to be natural pest control agents. The process of making organic pesticides is carried out through the maceration of onion skins, followed by the addition of TiO₂ nanoparticles that act as photocatalytic catalysts to increase pesticide effectiveness and degrade synthetic pesticide residues. The development of these organic pesticides is in line with the principles of Green Chemistry, particularly designing safer chemicals, catalysis, design for degradation, and real-time pollution prevention. Through the implementation of strategic steps such as research, testing, socialization, and continuous evaluation, TiO₂ nanotechnology-based organic red onion peel pesticides have the potential to become a safe, effective, and environmentally friendly alternative in supporting sustainable agriculture in Indonesia.

The shift in the international political order from a unipolar to a multipolar system has created increasingly complex global security dynamics and the potential for conflicts among states. This condition requires improving international political literacy among civil society, particularly Indonesian youth, so they can critically understand and respond to geopolitical transformations. In response to this urgency, this Community Service Program (PKM) aimed to enhance students’ global issue literacy through the Foreign Policy Community of Indonesia (FPCI) Goes To School (FGTS) 5.0 program themed Conflict & Military. The activity was conducted on April 6, 2026, involving 40 eleventh-grade students at SMA Negeri 97 Jakarta. The implementation method combined interactive lectures with popular culture references to make the material easier for teenagers to understand. Evaluation was conducted through pre-tests and post-tests in the form of multiple-choice quizzes. The material covered the concept of United States national interests, the Board of Peace (BoP) security initiative, Realism Theory, and the conflicts involving the United States, Israel, and Iran. The evaluation results showed that students had strong understanding of popular global issues but limited comprehension of technical aspects related to international institutions, such as the role of the International Atomic Energy Agency (IAEA). Therefore, future international political literacy programs should focus more on strategic and technical issues that are less familiar to the public.

The fleeting nature of human life constitutes a key theme in theological reflections within the Old Testament, particularly in the Book of Psalms in the Alkitab, which highlights human limitations and the inherent uncertainty of existence. Psalm 39:6–7 depicts human life as a transient shadow and emphasizes the futility of human efforts if they are not oriented toward God. This study seeks to explore the meaning of human transience in this passage and assess its theological significance for contemporary life. A qualitative approach with biblical hermeneutics is employed, considering historical, literary, and theological dimensions. The analysis indicates that the metaphor of the “shadow” illustrates human fragility, while the depiction of life’s futility critiques the human tendency to find purpose solely in worldly endeavors. Despite this, Psalm 39 ultimately directs readers toward hope in God, portraying Him as the ultimate source of true meaning. In a modern, materialistic context, this message continues to be relevant as a reminder of human dependency on God and the limitations of human life. Therefore, the transience of life does not signify the end of existential purpose but rather opens the way to deeper spiritual insight and the strengthening of faith.

This study aims to analyze the contribution and effectiveness of Local Tax and Local Retribution revenues to the Regional Original Revenue (PAD) of Bantul Regency during the 2021–2024 period. This research employs a quantitative descriptive approach using secondary data obtained from the Budget Realization Report (LRA) of Bantul Regency. The data analysis techniques used include contribution ratio analysis and effectiveness analysis by comparing realization with predetermined targets. The results show that the contribution of Local Taxes to the PAD of Bantul Regency during the 2021–2024 period is classified as good, with an average of 45.12%. Meanwhile, the contribution of Local Retribution to PAD is categorized as very low, with an average of 6.37%. In terms of effectiveness, Local Tax revenue is considered very effective with an average effectiveness rate of 109.18%, while Local Retribution revenue is categorized as quite effective with an average effectiveness of 92.42%. Based on these results, it can be concluded that Local Taxes are the most dominant and reliable source of PAD in Bantul Regency, while Local Retribution, although quite effective in achieving its targets, still requires optimization. Therefore, efforts are needed to optimize the collection of local retributions through the expansion of retribution objects, the review of more realistic targets, and the improvement of regional revenue management quality.

According to the WHO and the Ministry of Health, hypertension is defined as blood pressure ≥ 140/90 mmHg, consistent with the ESC/ESH guidelines. Hypertension is one of the leading causes of premature death worldwide. Symptoms experienced by patients with hypertension include headaches, sweating, palpitations, snoring, daytime sleepiness, muscle weakness, cramps, and cardiac arrhythmia. Clinical manifestations of hypertensive urgency include elevated blood pressure, severe headache, anxiety, and shortness of breath. Mrs. M, a 68-year-old woman, came to the Samudera Community Health Center complaining of a headache that had worsened approximately 3 days ago. The headache is felt at the back of the head, feeling heavy, and sometimes radiates throughout the entire head. The patient also describes the headache as throbbing. The headache was exacerbated when the patient could not sleep, consumed salty foods, and did not take her medication regularly.  The headache subsides slightly when the patient takes medication and sleeps with their head elevated.  The patient reported that the symptoms were also accompanied by nausea, dizziness, palpitations, and an inability to sleep at night. The patient has been diagnosed with hypertension for approximately 5 years. On physical examination, the patient’s blood pressure was 190/100 mmHg. The patient was advised to adopt a healthy diet by reducing salt intake. The patient was also prescribed the following medications: Captopril 25 mg twice daily, Amlodipine 5 mg once daily, Paracetamol 500 mg three times daily, and Domperidone 10 mg twice daily, to be taken as needed.

National milkfish aquaculture production in 2024 reached 792,864 tons, highlighting the strategic role of this commodity in supporting the economy of coastal communities. central java,as one of the main contributors, has significant potential for pond development, including in Ujungwatu Village, Jepara Regency. However, pond management still faces challenges regarding human resource (HR) quality and the optimal utilization of technology. This community service program aims to enhance students’ capacity through outreach and training on Internet of Things (IoT)-based milkfish pond development as an effort to strengthen HR at the Sidomaju 2 SME. Implementation methods include the stages of observation and problem identification, work program planning, WebGIS design, IoT outreach and implementation, and evaluation. The materials covered included an introduction to IoT concepts based on ESP8266, pond monitoring, milkfish feed management, and the implementation of WebGIS as a digital mapping system for the Kalingga milkfish ponds.The activity was attended by 20 students from MA NU Ujungwatu and was conducted in a participatory manner through experiential learning. The results of the activity demonstrated an increase in students’ understanding of the application of technology in milkfish farming, as well as heightened awareness of the importance of efficient and sustainable pond management. The main output of the program is the Kalingga Milkfish Pond WebGIS, which can be utilized as a digital medium for education and monitoring of pond areas. This program contributes to improving students’ technological literacy while supporting the strengthening of pond operational systems based on digital innovation.

This study examines the effect of transfer pricing, thin capitalization, and intangible assets on tax avoidance among manufacturing companies listed on the Indonesia Stock Exchange (IDX) during 2022-2024. Using a purposive sampling method, 90 firms were selected, yielding 262 firm-year observations after removing 8 outliers from an initial pool of 270. Tax avoidance is proxied by the Cash Effective Tax Rate (CETR); transfer pricing by the Related Party Transaction ratio (RPT); thin capitalization by the Debt-to-Equity Ratio (DER); and intangible assets by the ratio of intangible assets to total assets. The results indicate that transfer pricing has a significant negative effect on tax avoidance, thin capitalization has a significant negative effect on tax avoidance, and intangible assets do not significantly affect tax avoidance. The model is jointly significant (F = 25.422; p < .001) with an Adjusted R² of 21.92%, indicating that 21.92% of the variation in tax avoidance is explained by the three independent variables. These findings carry important implications for tax authorities seeking to strengthen oversight of related-party transactions and the capital structures of multinational enterprises.

This study aims to analyze the effectiveness of corporate zakat management in reducing economic inequality from the perspective of muamalah. The research employs a library research method with a qualitative-descriptive approach by examining various literature sources, empirical data, and regulations related to corporate zakat in Indonesia. The findings reveal that corporate zakat management achieves optimal effectiveness when zakat funds are distributed through a productive zakat scheme. This scheme is implemented through six main stages: preliminary surveys of beneficiaries, regular assistance, provision of business capital, business partner guidance, motivational training, and periodic evaluations of beneficiaries’ business development. However, practical implementation still faces several challenges. The allocation of funds for business capital among economically disadvantaged communities has only reached approximately 0.4%, while the majority of zakat funds, around 97.1%, are still utilized for consumptive assistance. This condition indicates that the economic empowerment function of zakat has not yet been fully optimized. Therefore, integrative solutions are required, including institutional strengthening through the establishment of Islamic microfinance units such as Baitul Maal wat Tamwil (BMT) internally, as well as stronger government regulations through tax deductible incentive policies externally to support the sustainable optimization of corporate zakat distribution.

The phenomenon of growth in Indonesia’s beauty industry has intensified competition among both global and local skincare brands, including Avoskin. This situation impacts consumer trust Instagram. Avoskin must compete to build brand trust amid the higher exposure and engagement dominance of global brands on social media. Challenges such as the presence of negative reviews and unfavorable consumer perceptions that lead to dissatisfaction represent significant threats to Avoskin’s ability to sustain brand trust. This study aims to determine the influence of electronic word of mouth and brand image of @avoskinbeauty toward brand trust. The research adopts a quantitative approach using the simple random sampling method, involving 400 active Instagram users as respondents. Data were collected through Google Forms and analyzed using IBM SPSS Statistics 30.. The T - test results show that Avoskin’s electronic word of mouth on Instagram has a positive and significant effect on brand trust, with a tcount greater than the ttable value (8.335 > 1.965) and significance < 0.001 < 0.05. Similarly, Avoskin’s brand image also has a positive and significant impact on brand trust, with a tcount greater than the ttable value (22.462 > 1.965) and significance < 0.001 < 0.05. The F - test results indicate that electronic word of mouth and brand image simultaneously have a significant effect on brand trust, with an Fcount greater than the Ftable value (870.240 > 3.02) and significance < 0.001 < 0.05. In conclusion, electronic word of mouth and brand image play essential roles in enhancing brand trust. The implication of this study is that skincare companies should continuously strengthen their digital presence, consistently manage their brand image, and actively facilitate and respond to electronic word of mouth, especially on social media platforms.

The development of digital technology has transformed trading patterns through the emergence of live shopping, a phenomenon that enables real-time interaction between sellers and consumers. Although it offers marketing efficiency, this model poses significant legal risks, including misleading information, promotional manipulation, and product non-conformity. This study aims to analyze legal certainty in consumer protection within live shopping transactions, examine the forms of business actors’ liability for consumer losses, and identify obstacles to regulatory implementation along with efforts to strengthen supervision.The research method employed is normative legal research using both a statute approach and a conceptual approach. The results indicate that legal certainty in consumer protection within this ecosystem is grounded in the integration of Law No. 8 of 1999 (Consumer Protection Law) as the lex generalis and Government Regulation No. 80 of 2019 (Electronic Commerce/PMSE) as the lex specialis, which recognizes the validity of real-time electronic contracts. The legal liability of business actors is strict liability in nature, in accordance with Article 19 of the Consumer Protection Law, and may also be construed as a tort (Article 1365 of the Civil Code) in cases involving distortion of visual information.However, the effectiveness of these regulations is hindered by the ephemeral nature of transactions and low levels of digital literacy. This study recommends the implementation of technology-based supervisory systems (suptech), strengthening the oversight function of platforms (PPMSE), and policy synchronization between the Ministry of Trade and the Ministry of Communication and Informatics in standardizing business actor verification to ensure the security of the digital commerce ecosystem.