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This study aims to analyze the simultaneous effect of the variables of facilities, corporate image, price perception, and service quality on the increase in passenger numbers for Citilink Indonesia Airlines at Jenderal Ahmad Yani International Airport Semarang. The air transportation service sector requires a comprehensive understanding of the factors driving customer loyalty and purchasing decisions to maintain the company's competitiveness. The research method used is descriptive quantitative, with data collected from questionnaires distributed to 100 respondents who are passengers of Citilink Indonesia Airlines. Data analysis was performed using multiple linear regression, resulting in the equation Y = 0.214 + 0.205X1 + 0.171X2 + 0.337X3 + 0.144X4 + μ. The study's results show that both partially and simultaneously, facilities, corporate image, price perception, and service quality have a positive and significant effect on the increase in passenger numbers. Price perception was found to be the dominant factor, with the highest regression coefficient, followed by facilities. Managerial implications suggest that airlines and airport operators focus on setting competitive prices and improving facilities to sustain passenger growth.

Air bersih merupakan kebutuhan pokok yang sangat penting bagi kehidupan manusia. Seiring dengan pertambahan dan perkembangan penduduk kebutuhan akan air bersih juga semakin meningkat, untuk itu perlu dilakukan analisis terhadap sistem jaringan perpipaan eksisting. Penelitian ini dilakukan dengan bantuan Pamsimas Sendang Lumintu Desa Sendangkulon Kecamatan Kangkung yang bertujuan untuk mengetahui kondisi eksisting sistem jaringan perpipaan Pamsimas Sendang Lumintu untuk tahun 2024 , mengetahui berapa besar kebutuhan air yang dibutuhkan untuk memenuhi pertumbuhan penduduk sampai dengan tahun 2039,  dan menganilisi kondisi eksisting sistem jaringan perpipaan Pamsimas Sendang Lumintu untuk tahun 2039. Metode yang digunakan dalam penelitian ini adalah dengan mengumpulkan data sekunder lalu menganalisis data tersebut dengan program EPANET 2.0 sehingga didapatkan hasil simulasi. Hasil simulasi menunjukan bahwa pada tahun 2024 besar debit kebutuhan rata-rata yaitu sebesar 16,27 liter/detik, kebutuhan harian maksimum 17,90 liter/detik dan kebutuhan jam puncak 24,40 liter/detik. Sedangkan untuk tahun 2039 besar debit kebutuhan rata-rata yaitu sebesar 20,92 liter/detik, kebutuhan harian maksimum 23,01 liter/detik dan kebutuhan jam puncak 31,38 liter/detik. Kondisi hidrolis eksisting sistem jaringan Pamsimas Sendang Lumintu Kecamatan Sendangkulon masih ada yang tidak sesuai kriteria. Kriteria yang dianalisa adalah sisa tekan dan kecepatan air. Pada jam puncak terdapat beberapa titik yang menghasilkan sisa tekan kurang dan kecepatan dibawah kriteria

This journal discusses the archive storage and maintenance system at the Lirik District Office, Indragiri Hulu Regency, using qualitative methods. The results of the study indicate that the archive storage system at the Lirik District Office has implemented manual and digital storage. Physical archive storage is carried out manually by arranging it based on the principle of the origin of the archive and the type of media, taking into account the environmental conditions of the storage room (temperature and humidity). Physical archives are stored in fireproof cabinets and coded folders. Digital archives are stored via Google Drive. There are regulations set to maintain confidentiality, limit access, and maintain the cleanliness of the storage room. Archive maintenance efforts include: (1) Maintaining the storage room with air conditioning and ventilation. (2) Cleaning the storage room and archives regularly. (3) Separating damaged archives; (4) Using fireproof metal archive cabinets; (5) Arranging archives neatly and using camphor. Overall, the implementation of the archive storage and maintenance system at the Lirik District Office has met expectations, although not yet optimal. This study concludes that the archive maintenance efforts carried out are quite good in maintaining the physical condition and information of the archives, although there is still room for improvement and optimization of the system.

Employee performance is a key factor in supporting organizational success, particularly in public service companies like Perumda Air Minum Tirta Moedal Semarang City. Various factors can influence performance, including perceived organizational support, work motivation, and individual competence. This study aims to analyze the influence of perceived organizational support, work motivation, and competence on employee performance. This study used a quantitative approach using a survey method. Data were collected through questionnaires distributed to employees of Perumda Air Minum Tirta Moedal Semarang City. The data analysis technique used was multiple linear regression to determine the effect of each independent variable on the dependent variable. The results of this study are expected to demonstrate that perceived organizational support, work motivation, and competence have a significant and positive influence on employee performance. These findings are expected to provide a basis for management in formulating human resource development policies to improve the effectiveness and efficiency of company services. This research also provides theoretical contributions to the field of human resource management and practical implications for employee performance management in regional companies.

Salah satu bentuk pengolahan limbah menjadi energi yang berasal dari limbah padat perkotaan adalah sampah bahan bakar turunan atau Refuse Derived Fuel (RDF). Terdapat berbagai teknologi pengeringan yang biasanya digunakan untuk pengeringan RDF. Contoh penerapannya adalah oil tube rotary dryer sebagai alternatif dari steam tube rotary dryer karena sejumlah alasan utama. Pertama, penggunaan oil engine sebagai material penghantar panas tidak membutuhkan tekanan tinggi seperti pada steam tube rotary dryer sehingga komposisi desain yang tidak serumit steam tube rotary dryer. Penelitian ini dilakukan untuk mengetahui perancangan dan analisis kekuatan struktur mesin oil tube rotary dryer yang dilakukan melalui software Solidworks. Cara kerja mesin dimulai dari pemanasan thermal oil di unit pemanas hingga mencapai suhu operasi yang diinginkan. Oil panas kemudian disirkulasikan secara tertutup ke dalam tube di dalam drum pengering. Pada saat yang sama, RDF dengan kadar air awal 55% dimasukkan melalui inlet housing ke dalam shell. Suhu yang bekerja pada oil untuk memanaskan sekitar 150°C, jumlah total tube 65 buah berdiameter 1,25 inch, dan panjang pipa 10 m yang tersusun di dalam shell. Hasil analisis struktur mesin oil tube rotary dryer berdasarkan simulasi didapatkan stress (von mises) dengan nilai tertinggi 9,371 × 108 N/m^2. Sedangkan nilai terendah 9,628 × 103 N/m^2. Nilai tertinggi dari hasil simulasi tersebut terjadi pada sudut tajam bagian support roller yang tidak terdapat kontak, sehingga hal ini dapat diabaikan karena merupakan stress singularity. Hasil simulasi displacement  dengan  nilai tertinggi 1,026 × 101 N/m^2. Sedangkan nilai terendah 1,000 × 10-30 N/m^2. Nilai tertinggi dari hasil simulasi tersebut merupakan penerapan dari gaya centrifugal yang terjadi pada drum/shell rotary. Hasil simulasi Safety factor yaitu mengacu pada rata-rata probe result adalah 2,3. Sehingga dari hasil simula

Water plays a fundamental role in sustaining human life, particularly as a source of drinking water. Nonetheless, the consumption of water that does not comply with established health standards can result in illnesses such as diarrhea and vomiting. In the Patrang District, the use of refillable drinking water has gained popularity as an economical substitute for bottled water. Despite its convenience, there are growing concerns about the microbiological safety of refillable drinking water, especially regarding contamination by Coliform and Escherichia coli bacteria, which serve as key indicators of water hygiene and safety. The objective of this research was to determine the contamination levels of Coliform and Escherichia coli bacteria in refillable drinking water. The study utilized a quantitative research design with descriptive analysis and employed the Most Probable Number (MPN) method for testing. Data collection took place from May to June 2024, comprising five water samples labeled X, Y, Z, A, and B, obtained from refillable drinking water depots in Patrang District using a simple random sampling approach. The results indicated that out of the five samples tested, the sample labeled Z was positive for Coliform with an MPN value of 920 cfu/mL, while the sample labeled A was positive for both Coliform and Escherichia coli with an MPN value of 2,000 cfu/mL. From these findings, two samples (Z and A) were identified as contaminated, with the highest bacterial concentration found in sample A, which had an MPN value of 2,000 cfu/mL

This study analyzes the partial and simultaneous influence of four factors—Publication (X_1), Access Convenience (X_2), Perceived Ease of Use (X_3), and Trust (X_4)—on the dependent variable, Intention to Use/Purchase (Y) Tiket.com for airline ticket purchases in Semarang City.1 Using an associative quantitative method, data were collected from 100 Tiket.com users (N=100) and analyzed via Multiple Linear Regression (SPSS 25.0).1 The analysis confirmed that all four independent variables positively and significantly influence the Intention to Use (all t_{hitung} > t_{tabel} 1.98498).1 The variable Perceived Ease of Use (X_3) was identified as the most dominant factor, showing the highest regression coefficient (\beta = 0.375), suggesting that the intuitive and effort-free experience of the application is the primary psychological driver for adoption among Semarang users.1, The overall model demonstrated a very strong explanatory capability, with an Adjusted R^2 of 0.792. This means 79.2\% of the variation in Intention to Use Tiket.com is jointly explained by these four variables, with 20.8\% attributed to factors outside the model.1 Managerial implications suggest prioritizing user experience design, clear information presentation, and maintaining transaction security to convert high interest into committed use.  

The increasing transportation activity in urban areas contributes significantly to air pollution, particularly through emissions containing Nitrogen Dioxide (NO₂). This reactive oxidizing gas can cause respiratory disorders and eye irritation, especially among high-risk groups such as permanent vendors working in bus terminals. This study aimed to analyze the environmental health risks of NO₂ exposure and identify related health complaints among permanent vendors at Brawijaya Bus Terminal, Banyuwangi Regency. A descriptive observational study with a cross-sectional approach was conducted and analyzed using the Environmental Health Risk Assessment (EHRA) method. Secondary data on NO₂ concentrations were obtained from the Banyuwangi Environmental Agency (average 0.00874 mg/m³), while primary data on respondent characteristics and health complaints were collected through questionnaires involving 10 permanent vendors. The results showed that the Risk Quotient (RQ) values for both realtime and lifetime exposure were below 1, indicating no significant non-carcinogenic risk. However, 60% of respondents reported coughing, 30% experienced shortness of breath, and 40–60% reported eye irritation. These findings indicate potential long-term health effects even though NO₂ levels remain below national air quality standards. Regular air quality monitoring, vehicle emission control, and health education for vendors are recommended to reduce exposure risks in transportation environments.

This research was conducted to systematically examine scientific evidence regarding the mechanisms and synergistic impacts of PGPR and intercropping on Water Use Efficiency (WUE) and Nutrient Use Efficiency (NUE) in drylands. The method used was a systematic literature study with a search for peer-reviewed articles and strict selection of research evaluating WUE and NUE parameters in intercropped crops and crops inoculated with PGPR. The results showed that intercropping systems can increase soil water retention, improve microclimate conditions, and optimize the utilization of space and nutrients between plant species. PGPR contributes to improving plant growth through nitrogen fixation mechanisms, phosphate dissolution, phytohormone production, and strengthening tolerance to drought stress. The synergy between these two approaches enhances the plant's ability to utilize water and nutrients more efficiently, thereby implying an increase in productivity and sustainability of dryland agricultural systems. These findings emphasize the need for verification through field trials, development of adaptive local PGPR isolates, and institutional and policy support to expand the application of this technology to drylands.

This article examines Ahmad Muhamad Mustain Nasoha’s thought on Islamic nationalism as the basis of patriotism. Nasoha emphasizes that nationalism does not contradict Islamic teachings; in fact, the values of faith, morality, and brotherhood in Islam can strengthen national consciousness. According to him, love for the homeland is not merely a slogan or rhetoric, but a manifestation of faith and a Muslim’s social responsibility that requires active involvement in preserving unity, upholding justice, and contributing to national development. This article highlights the historical, philosophical, sociological, political, educational, and theological aspects of Islamic nationalism, including the contributions of Islamic scholars and organizations in shaping national identity as well as in the formulation of Pancasila as the state’s foundation in harmony with Islamic values. Furthermore, the article discusses the relevance of Islamic nationalism in addressing contemporary challenges, such as Indonesia’s plural society, globalization, radicalism, and digital disinformation. Nasoha stresses the importance of harmonizing Islamic values with Pancasila, so that Islamic nationalism can serve as both social cohesion and an ethical guideline for citizens. The implementation of Islamic nationalism can be carried out through education, legal reinforcement, moral development, and concrete social contributions, enabling Muslims to preserve their religious identity while actively participating in national life. Through this comprehensive study, the article asserts that Ahmad Muhamad Mustain Nasoha’s ideas significantly contribute to the development of a moderate, inclusive nationalism grounded in Islamic values. His thought offers a strategic framework to cultivate patriotic young Muslims without compromising religious identity.  while strengthening Indonesia’s national integrity in the face of contemporary challenges.

Tanah ekspansif merupakan jenis tanah bermasalah yang memiliki potensi mengembang dan menyusut secara signifikan akibat perubahan kadar air, sehingga dapat menimbulkan kerusakan pada struktur perkerasan jalan, pondasi bangunan, maupun infrastruktur lainnya. Upaya stabilisasi kimia merupakan metode yang umum digunakan untuk meningkatkan sifat teknis tanah tersebut. Penelitian ini bertujuan untuk mengevaluasi efektivitas campuran semen dan magnesium carbonate (MgCO₃) dalam meningkatkan karakteristik fisik dan mekanis tanah ekspansif. Metodologi penelitian mencakup pengambilan sampel tanah ekspansif dari lapangan, pengujian sifat fisik serta pengujian mekanis meliputi uji pemadatan dan uji CBR. Variasi campuran semen sebesar 5% dan MgCO₃ sebesar 5-15% dari berat kering tanah. Hasil penelitian menunjukkan penambahan semen dan MgCO₃ mampu menurunkan plastisita, meningkatkan kepadatan dan nilai CBR secara signifikan dibandingkan kondisi tanah asli. Variasi paling efektif diperoleh pada 5% semen dan 15% MgCO₃ dengan nilai CBR unsoaked sebesar 16,35% dan CBR soaked sebesar 7,13%. Hasil ini menunjukkan MgCO₃ berperan sebagai aktivator mineral yang mempercepat reaksi pozzolanik dan meningkatkan pembentukan matriks pengikat pada butiran tanah. Campuran semen dan MgCO₃ dapat menjadi alternatif bahan stabilisasi yang efektif untuk perbaikan tanah ekspansif.

This study aims to determine the effect of the interaction between the duration of immersion of coconut water plant growth regulators and manure on the growth of guava cuttings (Syzygium aqueum). This study used a Factorial Randomized Block Design (RAK) consisting of 2 factors with 48 plots, namely: The first factor is the duration of immersion of coconut water plant growth regulators which is given the symbol 'A' which consists of 4 levels of treatment, namely A0: without immersion, A1: 3 hours, A2: 6 hours, A3: 9 hours. The second factor is manure which is given the symbol 'S' which consists of 4 levels of treatment, namely S0: 0 g / polybag, S1: 50 g / polybag, S2: 100 g / polybag, S3: 150 g / polybag. So there are 16 combinations consisting of 3 replications. The parameters observed in this study are the age of shoot emergence, number of shoots, shoot length, leaf length, number of leaves, percentage of survival. The results of the study showed that the duration of immersion in young coconut water with growth regulators and the application of cow dung fertilizer significantly affected the growth of water apple (Syzygium aqueum) cuttings. The results showed that the duration of immersion in young coconut water with growth regulators and the application of cow dung fertilizer only significantly affected the number of shoots and leaves observed in the ninth week.

This study examines Enha Water, a bottled mineral water business developed as an economic empowerment strategy based on Islamic boarding schools (pesantren) in Bengkalis Regency, Riau Province. The background of this research stems from the importance of the economic independence of Islamic boarding schools (pesantren) as Islamic educational institutions that play a role not only in religious development but also in strengthening the community's economy. The research method used was a qualitative case study approach. Data collection was conducted through in-depth interviews, observation, and documentation with the boarding school administrators, students, and related parties involved in the Enha Water business management. The results indicate that Enha Water's existence has significantly contributed to increasing the boarding school's income, creating jobs for students and the surrounding community, and fostering an entrepreneurial spirit based on Islamic values. Furthermore, this business also serves as a practical learning tool for students in economics and business management. Challenges faced include limited capital, marketing distribution, and competition with similar products. This study concludes that Enha Water has the potential to become a model for sustainable Islamic boarding school economic empowerment if supported by professional management, product innovation, and synergy with various stakeholders.

Dry packing with the principle of hibernation aims to suppress the metabolic processes of an organism so that it can survive under minimal environmental conditions. This study aims to determine the effectiveness of the dry packing method on the survival of freshwater crayfish (Cherax quadricarrinatus) tested with dry packing for 15, 20, and 25 hours. Before packing, the crayfish were ensured to be healthy and free from deformities. The packing was carried out using styrofoam lined with cardboard and filled with dried banana leaves, with a density of 20 crayfish of 10 cm size per package. The results showed that packing with dried banana leaves for 25 hours resulted in a 100% survival rate after packing, and the crayfish were able to become active again after 3 days. The dry packing method using dried banana leaves was proven effective in maintaining the survival of freshwater crayfish under live conditions during long packing durations. This study contributes to the development of efficient packing techniques for transporting freshwater crayfish alive.

Background: Chronic Obstructive Pulmonary Disease (COPD) is defined as a non-communicable disease related to the respiratory system, where airway spasm occurs which is interpreted through shortness of breath, decreased oxygen saturation, and increased sputum production. This sputum production is caused by exposure to harmful substances that can inhibit mucociliary clearance, goblet cell proliferation occurs which causes hyperplasia and hypertrophy resulting in the growth and enlargement of mucous glands which results in increased sputum production and causes ineffective airway clearance nursing problems. The purpose of this study was to describe nursing care for ineffective airway clearance (COPD) with effective cough training at RSUD dr. R. Soedarsono. Methods: This research used a case study design. The research participants were COPD patients with ineffective airway clearance nursing problems who were given interventions in the form of effective cough training in Interna Room 2 at RSUD dr. R. Soedarsono. Data collection was done through interviews, observation, physical examination, and documentation. Results: Ineffective airway clearance is resolved as shown by the patient saying the cough has decreased and is not tight, able to remove phlegm, additional breath sounds decrease, sputum production decreases and breathing frequency is 20x/minute.  Conclusion: Effective cough training is proven to be effective in improving airway clearance in COPD patients, so it can be one of the non-pharmacological interventions to overcome this problem.

Indonesia faces significant challenges in achieving sustainable development, particularly due to the negative environmental impacts of rapid economic growth, such as deforestation, air and water pollution, and the increase in greenhouse gas emissions. Green Bonds have great potential as a financial instrument to promote sustainable development in Indonesia. Indonesia is actively working to develop the market through key policies such as the Financial Services Authority Regulation (POJK) No. 51/POJK.03/2017, which regulates the issuance and offering of sustainable bonds, thus enhancing the suitability of green bonds to finance environmentally friendly projects. The research method used in this study is a normative legal approach with a focus on laws and regulations (UU) and a library research method. Through this approach, the study analyzes relevant regulations and existing literature to explore the potential and challenges Indonesia faces in implementing green bonds, particularly in the infrastructure investment sector. The implementation of green bond investments in Indonesia, especially in the infrastructure sector, is a strategic step in line with efforts to achieve sustainable development. To achieve this, Indonesia must also consider integrating green bonds into broader development policies. This includes developing strategies that combine economic, social, and environmental aspects in the planning and implementation of infrastructure projects.

This research aims to determine the influence of tourist attractions, social media, and values on the interest in visiting the Cunca Wulang waterfall tourist village in West Manggarai Regency. This research uses a quantitative research method. The population in this study consists of all tourists who have ever visited the Cunca Wulang Waterfall Tourism Village in West Manggarai Regency. The sample in this study consists of 100 respondents. The sampling technique used in this study is purposive sampling, a sampling method based on the researcher's considerations, which is then processed using SPSS. The data collection technique in this study uses a questionnaire. The instrument testing technique in this study uses validity and reliability. And the data analysis technique in this research uses descriptive analysis, classical assumptions, multiple linear regression, coefficient of determination, and hypothesis testing. The results of this study are as follows. Based on the F-test results, an F value of 125.691 was obtained with a significance level of 0.000. This significance value is smaller than the 0.05 significance level, so it can be concluded that the regression model used in this study is statistically significant. In other words, simultaneously, the independent variables consisting of Value, Tourist Attraction, and Social Media significantly influence the dependent variable, which is the Interest in Visiting the Cunca Wulang Waterfall Tourism Village in Manggarai Barat Regency

This study aims to analyze the differences in thermal conditions between coastal and riverside settlements, focusing on variations in temperature, humidity, and wind speed during day and night. The research sites include the coastal area of Dusun Karama Tengah (seaside) and Desa Salotengnga (riverside). Measurements indicate that the coastal area experiences more extreme daytime temperature fluctuations, reaching nearly 39 °C, with nighttime temperatures remaining warm and showing noticeable variation among points. In contrast, the riverside area displays more stable temperature patterns, with nighttime temperatures ranging between 28–30 °C. Relative humidity along the coast increases consistently at night, whereas in the riverside area it is heterogeneous, varying from saturated to very dry conditions. Wind speed serves as a key differentiating factor: the coastal area is still influenced by land–sea breezes, while the riverside environment tends to be stagnant with weak natural ventilation. These findings highlight distinct thermal comfort challenges in both settings—coastal areas are prone to daytime heat stress, whereas riverside areas face nighttime discomfort due to humidity and air stagnation. The results provide a foundation for adaptive architectural and spatial design strategies responsive to local microclimatic contexts.  

The development of embedded sistem technology is now widely used to support automatic environmental data recording processes, such as temperature, humidity, and air pressure. However, most existing weather data loggers still operate independently and are not directly connected to a computer. As a result, data collection and processing must be done manually, which is less efficient and prone to data loss. The main problem in this research is the lack of integration between microcontroller-based data loggers and simple computer operating sistems such as the Disk Operating Sistem (DOS), making it difficult to automatically store and access recorded data. This study aims to develop an embedded weather data logger sistem based on the AVR microcontroller integrated with DOS. The development process uses the waterfall model, consisting of sistem planning, requirement analysis, sistem design, coding, testing, and implementation. The designed sistem records weather parameters in real time and stores them in a file format that can be directly read by DOS without requiring additional conversion processes. The test results show that the sistem runs stably, records data accurately, and can be easily accessed through a computer. Integration with DOS allows data storage and retrieval processes to be faster and more efficient. Therefore, this sistem provides a practical solution for automatic weather monitoring that is reliable, time-saving, and easy to use in various environmental conditions.

PT. Citilink Indonesia is a low-cost airline operating in both domestic and international markets. This study explores how the company utilizes Marketing Public Relations (MPR) strategies to promote its brand and services. The focus of this research is on the implementation of integrated marketing communication strategies—particularly through social media and event-based promotions—to build a positive brand image and increase customer loyalty. Previous studies have addressed similar topics, such as PT. KAI’s MPR strategies in digital service transformation and PT. JNE’s efforts to enhance customer satisfaction through MPR. This research employs a descriptive qualitative method, with data collected through interviews and documentation. The findings reveal that Citilink’s MPR strategy adopts the Three Ways Strategy by Thomas L. Harris, which includes push, pull, and pass strategies. These are implemented through social media campaigns on platforms like Instagram, collaborations with Key Opinion Leaders (KOLs), and the organization of educational and entertainment events. The strategy has proven effective in enhancing audience engagement and expanding promotional reach amidst intense competition in the airline industry.