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Liquid Petroleum Gas, commonly known as LPG, is widely used in household activities, especially for cooking. However, its flammable nature makes this gas very hazardous if a leak occurs, which can result in an explosion that damages buildings, endangers the safety of those living there, and causes financial losses. Recently, the improper or unsafe use of LPG gas has led to numerous accidents and fires. This raises serious concerns for the people who use it. LPG gas leaks are often difficult to detect due to various factors, such as the absence of the gas's distinctive odor or the absence of people around the leak location. This study aims to detect gas leaks to minimize or prevent fires and LPG gas explosions. The methods in the research that will be carried out include identification, literature study, data collection, design, implementation, system testing, and conclusions. In this study, the design and implementation of an LPG gas leak detection system based on Arduino will be carried out to minimize this risk. The system will use MQ-2 to determine the concentration of LPG gas in the air. When a leak is detected, the Arduino microcontroller will process the input and automatically close the solenoid and activate the buzzer as an alarm. The implementation and testing results concluded that the system can detect LPG leaks above 600 ppm and respond effectively by cutting off the gas supply and providing an audible warning. This system is expected to improve household safety by providing early warning of gas leaks. Future developments may include integration with an Android app for smartphones, enabling more practical remote monitoring.

The advancement of information technology has transformed consumer behavior, particularly in making online purchasing decisions. YouTube, as one of the leading social media platforms, plays a crucial role in delivering product review content. This study aims to determine the influence of YouTube review content from the GadgetIn channel on online purchasing decisions of the TECNO CAMON 40 Pro 5G smartphone. The research employs a quantitative method with an explanatory survey approach involving 100 respondents who viewed the video titled “HP 3 jutaan bisa segila ini...”. The data analysis technique used is simple linear regression analysis using SPSS. The analysis results indicate a significant influence of GadgetIn's review content on purchasing decisions, with an R² value of 0.568 (56.8%), while the remaining 43.2% is influenced by other factors outside this study. The trust dimension (mean 4.115) was the most dominant factor, while the post-purchase behavior dimension (mean 4.11) was the most affected. Thus, it can be concluded that GadgetIn's review content has a positive and significant impact on consumer purchasing decisions.

During this process of monitoring the contents (volume) of the patient's urinary catheter manually, the nurse must go around one by one to the patient's inpatient room to ensure the contents (volume) of the patient's urinary catheter. This process takes quite a long time while patients who use urinary catheters at the hospital are not small. In addition, if the patient's urinary catheter monitoring process is still done manually, sometimes the medical team or nurses often miss or forget, that the urine bag (catheter) is full. The purpose of this study is to design an Internet Of Things Based Urine Bag Monitoring. The research method used in this study was experimental. The population in this study was 65 TREM study program students with a sample of 40 respondents. Based on the average score table of the Simplicity, Interactivity and Usability surveys. The results of the score calculation using the Likert scale from the Simplicity, Interactivity and Usability factors of urine bag monitoring testing that has been carried out using questionnaires to respondents have shown a high score that is almost close to the value of 5 based on calculations carried out using the Likert scale which indicates that this urine bag monitoring tool can be well received by respondents. It is expected to be developed as material for further research related to monitoring urine bags using applications that can usealarms on users' smartphones and can also use batteries on urine bag monitoring tools

This study analyzes the perceptions of ninth-grade students at SMP Negeri 236 Jakarta regarding the use of smartphones as a learning medium in the 21st-century era, where digital technology advancements have transformed the educational landscape and made smartphones a relevant tool for learning. The research aims to identify student perceptions and the obstacles they face. Employing a quantitative descriptive method with questionnaires and interviews involving 139 respondents, findings reveal positive perceptions across cognitive (especially creativity), affective (comfort), and conative (active engagement) aspects. However, challenges such as rapid battery drain, internet data consumption, notification distractions, and misunderstandings with teachers persist. The implications of this research emphasize the need for regulations, guidance, and solutions to support responsible and effective smartphone use in learning.

The tight competition in the premium smartphone industry requires companies to understand the factors that influence brand loyalty. iPhone is one of the products that remains in demand despite its relatively high price, indicating the important role of customer experience and perceived quality. This study aims to examine the effect of customer experience, perceived quality, and price on brand loyalty with customer satisfaction as a mediating variable. This research approach is quantitative with a survey method of 100 iPhone user respondents in Semarang City. Data analysis was carried out using the Structural Equation Modeling (SEM) technique with the help of the SmartPLS application. The results of the study indicate that customer experience, perceived quality, and price have a positive and significant effect on customer satisfaction. Furthermore, customer experience, perceived quality, and price do not affect brand loyalty. However, customer satisfaction has a positive and significant effect on brand loyalty. Then, customer satisfaction is able to mediate the relationship between customer experience and brand loyalty. However, customer satisfaction is unable to mediate the relationship between perceived quality and price on brand loyalty. The practical implication of these results is the importance of companies to focus on improving customer experience, product quality, and pricing strategies in order to strengthen their brand position in a competitive market.

Information technology has rapidly brought progress and great influence on human life. Digitalization facilitates all the needs and affairs of modern humans, because almost everything can be controlled with a smartphone. The purpose of this study is to determine the role of digital business literacy in fostering entrepreneurial spirit in adolescents. This research uses a qualitative method that focuses on analyzing the role of digital business literacy. This research provides an overview of the role of digital business literacy in fostering the entrepreneurial spirit in adolescents. The results of the discussion of several previous researchers, it can be concluded that the socialization of digital business literacy is proven to have a positive and significant influence in fostering the entrepreneurial spirit in adolescents / generation Z. The largest number of entrepreneurs is the age group of the entrepreneurial spirit. The largest number of entrepreneurs is the age group over 50 years, but digital entrepreneurs are currently dominated by young entrepreneurs. This is in accordance with the digital literacy theory proposed by Paul Gilbert, that digital literacy is able to make a person think critically, not just technical skills.

The purpose of this study was to determine the impact of smartphone use on politeness norms among adolescents in Teluk Lerong Ulu Village and the polite behavior of adolescents who use smartphones in Teluk Lerong Ulu Village. The study was conducted in Teluk Lerong Ulu Village, precisely on Banggeris Street, with the subjects of the study being several adolescents and also the community through the stages of observation, interviews, and documentation using qualitative descriptive research.  The results of the study indicate that the use of smartphones has a positive impact as an effective means of obtaining information about politeness, facilitating communication, and increasing ethical awareness on social media. However, excessive use of smartphones also has a negative impact on adolescents, such as decreasing the ability of adolescents to interact directly, ignoring the presence of people around them, and increasing the use of coarse and impolite language in digital communication. The polite behavior of adolescents who use smartphones in Teluk Lerong Ulu Village includes politeness in attitude, behavior and speech.These three aspects complement each other so as to create harmonious sosial interactions, build adolescent personalities so that they are able to position themselves appropriately in everyday life.

In these modern days, it is very difficult to find a person who is far from the internet or from their smartphone devices. The phenomenon that arises is that almost everyone now has more than one social media account. Social media itself, besides functioning as a space for socializing, is also used as a business platform, like online stores, due to the increasing number of users. However, when this opportunity exists, cybercriminals also prowl in search of easy ways to profit from unsuspecting users. One of the methods they rely on is phishing techniques. Phishing is a scenario designed to deceive people into unknowingly handing over their personal data to the trapper. By providing education about threats and ways to prevent this type of attack on social networking platforms, it is hoped that the public can become more critical and suspicious of suspicious signs on accounts or other web pages, as well as take appropriate preventive measures.

This study aims to describe the Accessibility of Management Information System Services at the Library and Archives Service of Gorontalo Regency. The research method uses a qualitative approach. The results of the study indicate that the Accessibility of Management Information System Services at the Library and Archives Service of Gorontalo Regency has not been running well, where of the three indicators measured there are two indicators that are not fully optimal, namely data access time and data accuracy, this can be seen from the many complaints from service users about the slow responsiveness of data or information needed by service users and frequent errors or inconsistencies between the data or information needed by service users and what is presented by the Management Information System. While one other indicator, namely access flexibility, is considered optimal, this can be seen from the time and method of the information access process which can really adjust to the conditions of service users, namely it can be accessed anytime and anywhere and in any way such as accessed via laptop, computer or smartphone.

Electronic money laundering has become a critical issue as a form of cybercrime. Advances in technology demonstrate that digital forensic applications, particularly those utilizing smartphones, can be employed to uncover digital traces of money laundering transactions. This study aims to analyze the relevance of existing legal frameworks, the effectiveness of smartphone forensic techniques, and the challenges faced in their implementation in Indonesia. Based on a review of the literature and regulatory analysis, it was found that legal frameworks such as UU No. 8 of 2010 on the Prevention and Eradication of Money Laundering (TPPU) and UU No. 19 of 2016 on Information and Electronic Transactions (ITE) provide an adequate legal foundation. However, gaps in implementation, such as limited human and technological resources, remain significant obstacles. Forensic techniques, including metadata analysis and device extraction, have shown great potential in identifying the flow of illicit funds. Nonetheless, their application is hindered by data confidentiality and the lack of uniform technical standards. Given the increasing complexity of digital crimes, an integrated approach is required, combining regulatory strengthening with technological capacity building, to enhance the effectiveness of smartphone forensics in addressing electronic money laundering.

This research aims to analyze the role of brand image as a mediating variable in the relationship between electronic word of mouth (e-WOM) and purchase intention for iPhone smartphone products in Denpasar City. The study is grounded in Consumer Behavior Theory, which explains how external and internal factors influence purchasing decisions. The widespread use of e-WOM in the digital age is a significant external factor in shaping consumer perceptions. Conversely, brand image is a critical internal asset for a company to build customer trust and loyalty. By understanding the interaction among these three variables, this research is expected to provide strategic insights for marketers. The study’s population includes Denpasar residents who either use or intend to purchase an iPhone smartphone. The sample size is 100 individuals, selected using a purposive sampling technique based on specific criteria such as age, social media usage, and knowledge of iPhone products. Data was collected by distributing questionnaires to respondents. The data analysis methods used were descriptive and inferential analysis. Inferential analysis included the Classical Assumption Test to ensure the data met statistical requirements, Path Analysis to examine the direct and indirect relationships between variables, the Sobel Test to measure the significance of the mediation effect, and the Variance Accounted For (VAF) Test to determine the extent to which brand image mediates the relationship. The results show that brand image plays a partial mediating role in the effect of e-WOM on purchase intention. This indicates that e-WOM not only directly influences purchase intention but also indirectly through the formation of a positive brand image. This finding confirms the importance of brand image as a bridge connecting electronic word-of-mouth promotion with consumers’ purchasing decisions. The implications of this research are highly relevant for iPhone smartphone marketers.

This study examines the role of technology and innovation in supporting the growth of the Islamic economy in Muslim countries. The development of digital technology has brought significant changes to people's lives, particularly in economic activities. The presence of the internet, smartphones, and various digital platforms has made economic activities easier, faster, and more practical. This research shows that technology and innovation have a significant influence on the development of the Islamic economy. Technology helps people access Islamic economic services more easily and efficiently. Overall, technology and innovation play a crucial role in strengthening the growth of the Islamic economy in the digital era. Therefore, support from the government, financial institutions, the business community, and the public is needed to ensure that the use of technology in the Islamic economy can develop optimally and remain in accordance with Sharia values.

Extreme climate change in Indonesia, caused by air pollution from the use of fossil energy, has encouraged the development of renewable energy technology, including Wind Power Plants (PLTB). This technology is increasingly important for providing clean energy, especially in the maritime industry. The aim of this applied scientific work is to provide a battery charging solution when the emergency battery charger charging system on commercial ships experiences problems. To make it easier to monitor the power produced by wind power plants and also battery capacity via a smartphone application in real time. The method used in this applied scientific research research is experimental. The results of calculating the average power during testing at night show an average power of 10.22 Watt/min and an average current of 0.78 A. So it can be concluded that battery charging takes 11.53 hours. Meanwhile, the results of calculating the average power during testing during the day show an average power of 13.41 Watt/min and an average current of 1.02 A. So it can be concluded that charging the battery lasts for 8.82 hours. From the two data obtained, it can be concluded that charging is optimal during the day because the efficient charging time is 8.82 hours.

Rapid technological developments have made internet access easier and increased smartphone use, including in Indonesia which occupies fourth place in the world with 160.23 million users.  One of the negative impacts is the increase in online gambling which can now be accessed easily.  This research aims to explore differences in levels of impulsivity in individuals with various levels of severity of online gambling addiction, using Whiteside and Lynam's (2001) theory of impulsivity.  The research method used is descriptive quantitative with data collection techniques using a questionnaire in the form of a Likert scale.  The research sample was Padang State University students who were addicted to online gambling, selected using a purposive sampling technique.  Data analysis was carried out using the Kruskal-Wallis statistical test.  The results showed that there was no significant difference in the level of impulsivity between individuals with mild, moderate and severe levels of gambling addiction (p > 0.05).     

Phubbing behavior has become a significant global phenomenon among adolescents, with multidimensional impacts on social interactions, mental health, and academic performance. This article aims to analyze the causal factors, impacts, and prevention strategies of phubbing. This research uses a literature study type by analyzing several relevant articles. The results showed that the main factors driving phubbing include smartphone addiction, Fear of Missing Out (FoMO), boredom, and low self-control. Impacts include decreased quality of social interactions, increased anxiety, decreased academic focus, and physical impairments such as headaches. Although some studies indicate phubbing does not significantly affect friendship satisfaction in certain groups, the phenomenon generally disrupts interpersonal relationships. The proposed solution involves a holistic approach through digital literacy education, family interventions, school policies and physical activity.

Fish is one of the easiest foods to get, but fish easily spoil. So there are 2 methods to extend the life of fish so that they do not experience a spoilage, namely drying and salting. In the 4.0 era, technology is growing rapidly, one of which is IoT-based technology, in order to help all activities carried out by humans to be more effective and efficient. The purpose of this study is to design an automatic salted fish dryer system using the Internet of Things (IoT) and determine the performance effectiveness of salted fish dryers using the Internet of Things (IoT). The research method of this scientific paper uses an experimental method to test the hypothesis that will be proposed and is useful for predicting an event. Data collection techniques using literature study, data collection, needs analysis, application design and application programming as well as algorithm implementation. Based on the results of the research, the design of an automatic salted fish drying equipment system based on the Internet of Things (IoT) has the ability to monitor the movement of the tool through a smartphone. All components of the appliance can operate automatically just by pressing the start button and setting the duration of the time and the existence of an Internet of Things (IoT)-based salted fish drying device can facilitate and streamline the time when the process of drying fish into salted fish. Initially, small anchovies weighing 100 grams were dried for 3 days, but after using a salted fish dryer, the drying process was reduced to 3 hours (09.00 a.m-13.00 p.m) with a moisture content of 18 grams, while small flying fish weighing 100 grams required a drying process for 5 days (09.00 a.m-13.00 p.m) and would have a moisture content of 30 grams in 3 hours after using a salted fish dryer.

Using smartphones in interpersonal communication among adolescents is now commonplace. Many teenagers who follow the flow of communication media in technology choose smartphones as a more effective interpersonal communication medium. Compared to other forms of communication, interpersonal communication occurs personally, in face-to-face situations, and through media. Interpersonal communication is fundamental since it permits it to require place dialogic communication. Exchange may be a shape of interpersonal communication that appears in the event of interaction. Those included in this communication frame are double-functioning, each being the speaker and the audience, on the other hand. This report analyzes adolescents’ interpersonal communication culture in the smartphone-use era based on this statement. The method used is the phenomenological method. The conclusion of this study indicates that the current adolescent interpersonal communication culture is more influenced by digital technology than direct interaction. Therefore, efforts are needed to foster awareness of the importance of maintaining a healthy quality of interpersonal communication amid technological advances.

This research analyzes the efforts of Akidah Akhlak teachers in reducing smartphone addiction through classical guidance services in Islamic religious education (PAI) learning at MTsN 3 Magetan. The method used was qualitative observational, with data obtained through interviews, observation, and documentation. The results show that classical guidance methods such as Team Game Tournament (TGT), Student Teams Achievement Division (STAD), and Jigsaw were effective in fostering student engagement and reducing smartphone use during class. Supporting factors include school regulations, teacher-parent collaboration, and interactive learning environments, though external environmental influences remain a challenge.    

Today is a sophisticated era where everything is digital, be it smartphones, laptops, even safes. So digital password security is essential in protecting personal data. This study analyzes password strength using combinatorics and probability. Calculations are made to determine the number of possible password combinations based on the length and type of characters. In addition, the probability of success of a brute-force attack is calculated based on the number of guesses that can be made by the attacker. The results show that the longer and more complex the password, the less likely it is to be guessed. This study also discusses the concept of information entropy to measure the level of randomness of passwords and its impact on digital security. This study provides insight into the importance of choosing strong passwords.

Oka Jamur Bali is one of the oyster mushroom cultivation farmers. Lack of efficiency in regulating temperature and humidity in mushroom barns is an important factor in the growth of mushroom fruiting bodies. This condition requires an innovative solution to regulate and monitor temperature and humidity in the barn area. This research aims to build a prototype using Arduino UNO, ESP32, DHT11, pump and Internet of Things (IoT) technology.  The monitoring system design uses Arduino UNO, NodeMCU ESP32, DHT11 and DC pump with 12V voltage. Arduino UNO functions as a control system to manage and control the temperature and humidity parameters of the mushroom barn environment with the DHT11 sensor used to accurately measure temperature and humidity. The combination of NodeMCU ESP32 and Arduino UNO aims for monitoring through the ThingSpeak platform which can be accessed with a smartphone connected to the internet network. Based on the results of the prototype of the automatic temperature and humidity control system, the system is able to measure the environmental conditions of the mushroom barn with humidity measurement results in the range of 79% - 82% and the average temperature during the test reached 29.35°C. The application of the system was able to reduce the temperature by 2.28% with an average temperature of 28.19°C and increase the relative humidity by 6.27% with an average humidity of 81.1% in the mushroom barn area. The results of income between the income generated by using the automatic temperature and humidity control system tool and the income of farmers without using the tool increased by Rp. 16,416.