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Antre merupakan kegiatan yang sangat erat kaitannya dengan kehidupan sehari-hari dan timbulnya antrian yang panjang akan mengakibatkan hilangnya pelanggan/ nasabah. Salah satu antrian yang dialami adalah antrian berobat dengan menggunakan asuransi BPJS Kesehatan di Puskesmas Margadadi Kabupaten Indramayu yang memiliki administrasi yang berbelit-belit. Pemodelan dan simulasi sistem digunakan untuk menganalisis antrian dalam sistem sehingga dapat diketahui alternatif perbaikan yang dilakukan. Berdasarkan output model sistem yang telah dibuat menggunakan software Promodel 7.5 dengan input sesuai dengan data pengamatan yang dikumpulkan dan beberapa hasil validasi data, maka dapat diketahui jumlah entitas yang masuk dan keluar tidaklah sama, yaitu 48 orang masuk dan 20 orang keluar. Ini menunjukkan terdapat antrian dalam sistem. Secara keseluruhan, sistem antrian BPJS Kesehatan pada penelitian ini cukup efektif karena aktivitas entitas lebih banyak dihasbiskan dal proses operasi. Namun, berdasarkan beban kerja yang dialami petugas administrasi dan dokter diperlukan penambahan jumlah petugas dan dokter.

The quality of financial reports is the most important factor in government organizations such as the Class 1 Agricultural Quarantine Office in Semarang. This study aims to analyze the effect of e-procurement, the application of government accounting standards, and the internal control system for the quality of financial reports. The population in this study were all employees of the Class 1 Semarang Agricultural Quarantine Center with 110 employees. The number of samples in this study was 110 employees with the sampling method using the census. The data analysis method used is the path analysis model. The results of the research are the simultaneous effect of the use of e- procurement,  the  application  of  government  accounting  standards,  and  the internal control system together have a significant (0,000) and  effect (122,450) on the quality of financial reports. The effect of the use of e-procurement, implementation of government accounting standards, and internal control systems on the quality of financial reports is 77%. The results of the partial hypothesis testing of the use of e-procurement have a positive (0,379) and significant (0,000) effect on the quality of financial reports. The application of government accounting standards has a positive (0,397) and significant  (0,000)  effect  on  the  quality  of  financial  statements.  The  internal control system has a positive (0,186) and significant (0,016) effect on the quality of financial statements.

The study aims to analyze the influence of Application System E-Filing against obedience must tax with socialization taxation and understanding the internet as variable moderation. research data was obtained from a questionnaire (primary) distributed to Must North Sumatra I Medan DJP Tax with the use method of convenience sampling. Population study is must personal Tax North Sumatra I Medan DJP. Sample used in research this as many as 50 respondents. The questionnaire was tested using a validity test and a reliability test before the research. Test assumptions classic used are the normality test, multicollinearity test, heteroscedasticity test, and linearity test. The hypothesis test used is simple linear regression and Moderated Regression Analysis. Research results show that implementation of system E-Filing has an effect significant to obedience must tax, socialization taxation strengthens the application of system e-filing to obedience must tax, and internet understanding strengthens the application of system E-Filing against obedience must tax.

This research is motivated by the performance achievements of the employees of the Tanjung Emas Middle Type Customs and Excise Office of Supervision and Service Office which have not been achieved. The purpose of this study was to analyze the influence of Motivation (X1) and Competence (X2) on Employee Performance (Y) in the Customs and Excise Supervision and Service Office of the Middle Type of Customs Tanjung Emas. Descriptive analysis in this study uses the index number method. Determining the number of samples was calculated based on the slovin formula and obtained a sample of 71 employees from a total population of 248 employees. The sampling method uses simple random sampling technique. The results of the analysis show that motivation has no significant positive effect on employee performance. This is indicated by the calculated t value which is smaller than t table, namely 0.481 <1.667 (df = 68), with a significance value of 0.632 which is greater than α = 0.05. Motivation (β1) is positive at 0.042 which means that there is no effect of motivation on performance (not significant). The results of the analysis show that competence has a significant positive effect on employee performance. This is indicated by the calculated t value that is greater than t table, namely 8.028 > 1.667 (df = 68), with a significance value of 0.000 which is smaller than α = 0.05. Competence (β2) has a positive sign of 0.705 which means that the higher the competency, the higher the employee's performance (significant).

The government continues to strive for the availability of vaccines through multilateral and bilateral schemes to meet the current stock and maintain the vaccination rate in accordance with the existing vaccine stock (Widyawati, 2021). Tlagomas Urban Village, Lokwaru District, has a population of 19,826 (Central Bureau of Statistics Malang City, 2020). Of this population, not all of them have been vaccinated. So that the urban village government seeks accelerated vaccination programs, one of which is the implementation of a mass vaccine program. The purpose of this community service activity is to help implement the second dose of mass vaccine in Tlogomas Urban Village, Malang City. The methods used in this program are planning and preparation, implementation, and evaluation. The result of this activity is the availability of infrastructure and vaccine implementing officers as well as the implementation of the second mass vaccine activity in Tlogomas Urban Village, Malang City with a total number of 988 participants. The flow of vaccine activities includes registration, screening history and simple physical examination, administering vaccines and recording.

tempe chips are the product of Sumber Agung Home Industry. This business is a hereditary effort in order to strengthen the family economy. Tempe chips are a product that is liked by the community, besides being delicious, nutritious, affordable prices are also easy to obtain. This housing business is widely cultivated, in addition to materials that are around the business location, the production process is relatively simple, the capital is not large, the market share is wide open. So it is not surprising that in the development of the Sumber Agung Home Industry, it faces competition, especially in product marketing. This is because in determining the selling price of Sumber Agung, it should be based on the cost of production which is calculated accurately. This has not been able to be done. So far, Sumber Agung has not carried out the process of making the cost of production in business. The FE Unisri Service Team tries to provide assistance in making production prices so that Sumber Agung can set an accurate selling price so that they can compete in selling products. With the determination of the cost of production, Sumber Agung can always develop real expenditures from its production costs in the form of: raw material costs, auxiliary materials, labor costs and factory overhead costs.

Home security system is a term to describe a system of protection for residents in the environment and its surroundings from the interference of crime. A house has been equipped with high technology and can be connected to the security equipment in the house. Home security is made in order to create security, comfort and safety for residents of the house and can maintain the security of the environment without monitoring. Home security can be operated via a microcontroller and a mobile device. Home security in Indonesia is currently classified as very important, this is because the crime rate is increasing every year. The development of home security has been carried out using various existing technologies, such as the nodemcu microcontroller, which is a hardware platform intended to create prototypes of interactive electronic equipment based on flexible and easy-to-use hardware and software. This research was conducted to produce a simple home security system by utilizing nodemcu technology and a combination of sensors and an ESP32 cam as a medium to be able to run sensors and home security cameras. This research was conducted by conducting a literature study, exploring the technologies used, as well as the concept of mobile-based software development. The next step is to define requirements, analysis, design, and implementation (programming and testing the system that has been built).

Rumput laut atau alga (euceuma cottanii) telah dimanfaatkan penduduk pantai di Indonesia untuk bahan pangan dan obat-obatan. Negara kepulauan, Indonesia dapat memanfaatkan sumber daya perairan dengan maksimal untuk di jadi suatu produk farmasi. ,mengandung senyawa biokimia sebagai metabolik sekunder salah satunya sebagai aktivitas antibakti, Penilitian ini bertujuan untuk mengetahui aktivitas antibakteri ekstrak etanol pada Eucheuma Cottonii dapat menghambat bakteri Staphylococcus Aureus. Metode yang di gunakan yaitu difusi sumuran dan metode in nova. Pada penelitian ini dilakukan uji skrining fitokimia dan uji aktivitas antibakteri ekstrak rumput laut hijau (euceuma cottanii) dengan menggunakan pelarut etanol 70%. Ekstraksi rumput laut hijau (euceuma cottanii) dilakukan dengan menggunakan metode maserasi untuk mendapatkan ekstrak. Hasil uji skrining fitokimia ekstrak etanol 70% rumput laut hijau (euceuma cottanii) memiliki kandungan metabolit sekunder seperti : flavonoid dan steroid. Ekstrak rumput laut hijau (euceuma cottanii) mempunyai kemampuan menghambat pertumbuhan bakteri staphylococus aureus dengan diameter zona hambat terbesar yaitu pada kosentrasi 30% sebesar 19 mm, dan diameter yang terkecil pada kosentrasi 10% sebesar 15 mm. Maka dapat di Simpulkan bahwa Hasil uji skrining fitokimia ekstrak etanol 70% rumput laut hijau (euceuma cottanii) memiliki kandungan metabolit sekunder seperti : flavonoid dan steroid. Ekstrak rumput laut hijau (euceuma cottanii) mempunyai kemampuan menghambat pertumbuhan bakteri staphylococus aureus dengan diameter zona hambat terbesar yaitu pada kosentrasi 30% sebesar 19 mm, dan diameter yang terkecil pada kosentrasi 10% sebesar 15 mm.

This study aims to develop and determine the effectiveness of the "Rainbow Learning Box" learning media in fostering scientific literacy in early childhood. This media is designed as a simple, experiment-based science learning tool using colorful colors to help children understand the concepts of color, color mixing, and simple changes through play-and-learning activities. The study employed the Research and Development (R&D) method with the ADDIE model, which includes the stages of analysis, design, development, implementation, and evaluation. The study subjects consisted of 20 children aged 5–6 years at a pre-school (PAUD) institution. Data collection techniques included observation, interviews, documentation, and child development assessment sheets. The results showed that the use of the "Rainbow Learning Box" increased children's engagement in learning, curiosity, observation skills, and simple communication skills related to experimental results. Children appeared more active and enthusiastic during learning activities because the media was engaging, interactive, and suited to the learning characteristics of early childhood. Furthermore, teachers responded positively to the media's use, citing its ease of use, safety, and affordability. Therefore, the "Rainbow Learning Box" can be an alternative, innovative science learning media to optimally support the development of scientific literacy in early childhood. 

Productive-age unemployment is one of the main challenges in economic development in Baubau City. The lack of access to skills training, limited job market information, and low motivation for entrepreneurship are key factors contributing to the high unemployment rate among the productive-age population. This study aims to map the unemployment conditions in Baubau and implement a counseling and training program to enhance employment readiness and entrepreneurship skills.  This study uses a qualitative descriptive approach through surveys, interviews, and Focus Group Discussions (FGD). The counseling program involves multiple stakeholders, including government agencies, businesses, and educational institutions. The results indicate that the program effectively increased participants' understanding of job search strategies, industry-based skills, and entrepreneurial interest. Evaluations show that employment readiness and entrepreneurship skills improved from 40% to 80% after training.  With this program, the productive-age population in Baubau is expected to be better prepared for employment challenges and have alternative solutions for economic self-sufficiency. Strengthening collaboration among stakeholders is essential to ensure the sustainability and broader impact of similar programs. 

During the COVID-19 pandemic and the new normal, teacher innovation is urgently needed to make their students not bored and stressed in the learning process, either virtual or face-to-face. In North Maluku, face-to-face learning has been carried out with simulations and strict protocols. Learning variations using Blended Learning become a general solution that is applied. Infographics are information graphics which are visual representations of a collection of data, information and designs. Infographics require a large amount of information in the form of writing or numbers and then converted into a simpler form, namely a combination of images and text that allows readers to quickly understand the meaning of a message or image itself. Various efforts to educate covid 19 both non-formally and formally have been carried out to prevent infection, social restrictions and the provision of social and medical assistance have been carried out by the government, but the public still does not have good awareness and discipline towards covid 19. This study aims to educate about the virus and its dangers, especially covid 19 through the development of infographic-based science teaching aids in elementary schools. Research Development with reference to 4D models with modifications. The results of the study indicate that infographic media is suitable for use as media material or science teaching aids, especially virus education for elementary school students. The use of infographics related to viruses and infection mechanisms can be used in various ways in online and offline learning for elementary school students

Virtual laboratories can provide real learning experiences through computer-aided simulations and activities. Virtual laboratory is rapidly developing its use in science learning because it is proven to provide significant benefits to the process and results of science learning during the pandemic. The limitations of laboratory facilities in genetics learning at the unkhair Biology Education Study program have encouraged the development of virtual practicum strategies and their use in genetic learning with modified free inquiry strategies on the topic of the structure and function of genetic material and reproduction of genetic material. The purpose of this study was to analyze the effectiveness of virtual laboratories based on student perceptions of the use of virtual laboratory applications and to describe and compare these perceptions with the use of laboratory reality and relevant previous research results. There are five aspects of perception surveyed, namely innovation, motivation, effectiveness, benefits, and presentation of practical procedures. This research method uses a quasi-experimental research design for the characteristics and effectiveness of using virtual laboratories and real laboratories in the Genetics course at the Biology Education Study Program, Khairun University, Ternate on the topic of DNA isolation, chromosomes and mitosis. The results of this study indicate that: the characteristics of Blended Learning practicum in the Genetics course in 4th semester students of Biology study program are: 1) instruction-based practicum; 2) practicum based on data collection and reporting of practicum results; 3) practicum based on proof of concept. The effectiveness of the implementation of genetics practicum in laboratory reality and virtual laboratories based on the perception of student responses is more likely to choose reality laboratories than virtual laboratories. The effectiveness of the implementation of genetic practicum based on the results of the practicum report is known to be not significantly different between the results of the practicum in reality and in the virtual laboratory.

Tujuan penelitian ini adalah untuk mengetahui seberapa besar pengaruhnya kepemimpinan dengan gaya yang demokratis, kemudian motivasi intrinsik dan kompensasi terhadap kinerja suatu karyawan pada KSPPS BMT Al-Fath Kota Tangerang Selatan. Sampel ditentukan dengan menggunakan model non-probbability sampling. sedangkan untuk teknik analisis data menggunakan metode asosiatif kuantitatif melalui pendekataan verifikatif. dalam tahapan pengujian yang digunakan adalah uji validitas, reabilitas, menguji asumsi klasik, analisa linier berganda, analisia koefesien korelasi, analisa koefesien determinasi, menguji hipotesis, menggunakan pengujian terhadap atau uji t yaitu pengujian parsial kemudian uji F yaitu pengujian secara bersama (simultan). Dari analisa penelitian tersebut menunjukan seluruh hipotesis diterima, dimana kepemimpinan dengan gaya demokratis, motivasi intrinsik dan kompensasi terhadap varibel kinerja karyawan.  

This program took place from February 21 to 23, 2022, in the XVIII neighborhood, Binjai Village, Denai District, Medan Regency/City, North Sumatra Province. The program is designed for children aged 8-12, and the materials taught include Simple Present Tense and several songs that utilize Simple Present Tense. The duration of each session is 90 minutes. The number of children involved is approximately ten (10) individuals. Each session is divided into two parts, the first 45 minutes facilitated by Teacher A, and the remaining 45 minutes continued by Teacher B, and so on until the third day. Upon completion of this program, the children showed significant improvement in listening skills, vocabulary recall, and vocabulary memorization, as reflected in the test scores given by the instructors before and after the program. Learning through English songs has proven to be highly effective for children in the XVIII neighborhood, Binjai Village, Denai District. The use of songs as a teaching method helps enhance listening abilities, learn new vocabulary, develop speaking skills, and improve social skills in children. Therefore, incorporating songs into early English language learning is highly recommended.

Bell's palsy is a neurological disorder and disorder of the cranial nerve VII (facial nerve) in the temporal bone area that causes weakness or paralysis of the facial muscles around the stylomastoid foramen. The cause is not known to be vascular ischemia, viral disease (Herpes simplex, Herpes zoster), autoimmune disease, or a combination of these factors. The purpose of this study was to determine the effect of Physiotherapy Management in Bell's Palsy with Infra Red, Electrical Stimulation of Faradic Current and Exercise Therapy as modalities. The study was conducted at Bendan Hospital, Pekalongan City with descriptive analytic method in patients with Bell's Palsy condition. Methods of collecting research data using autoanamnesis and physical examination. The research instrument consisted of examining pain using the Visual Analogue Scale, muscle spasm with palpation, muscle strength using manual muscle testing, and functional activity using the Ugo Fisch scale. After therapy 1 to therapy 4 there was a decrease in pain from T1 = tenderness 4 to T4= tenderness 0. Increased facial muscle strength T1 = m. orbicularis oculi 3 to T4 = m.orbicularis oculi 5. Decreased muscle spasm T1 = m. frontalis 1, m. corrugator supercilli 1, m. zygomaticum 1, m. orbicularis oris 1, m. mentality 1 to T4 = m. frontalis 0, m. corrugator supercilli 0, m. zygomaticum 0, m. orbicularis oris 0, m. mentalis 0. The conclusion is Infra Red, Electrical Stimulation of faradic currents and Exercise Therapy can reduce pain, decrease muscle spasm and increase muscle strength on Bell’s Palsy Sinistra.

Dewasa ini, kemunculan virus yang dikenal dengan Corona Virus Disease 2019 (Covid-19) pada akhir tahun 2019 di kota Wuhan, Republik Rakyat China, membuat panik seluruh dunia. Hal ini menyebabkan seluruh aktivitas masyarakat dibatasi untuk mengurangi penularan virus tersebut. Pembatasan aktivitas dengan kebijakan mengenai aktivitas bekerja yang dilakukan dirumah dan kebijakan mengenai isolasi mandiri untuk seseorang yang terinfeksi virus Covid-19. Kedua kebijakan tersebut secara tidak langsung mengharuskan adanya kondisi dan desain tata ruang yang ideal untuk mendukung semua aktivitas. Oleh karena itu dengan adanya pandemi Covid-19 ini menyadarkan masyarakat bahwa pentingnya fungsi rumah tinggal yang kondusif dan responsif terhadap virus tersebut, serta mendukung untuk pembatasan penyebaran dan pemulihan jika terinfeksi. Penelitian ini bertujuan untuk mencari apa saja kriteria desain rumah tinggal pasca covid-19 dan seperti apa usulan desain yang ideal, kondusif dan responsif. Penelitian akan menggunakan metode penelitian kuantitatif dengan metode penelitian tindakan yang bersifat terapan. Penelitian ini akan dilakukan kajian kriteria desain dari aspek ruang, aktivitas pengguna, dan penanganan kontaminan/ limbah melalui studi literatur dan observasi lapangan. Kemudian membuat usulan desain rumah tinggal pasca pandemi yang ideal dan kondusif dengan melakukan pendataan dan pengukuran sistem penghawaan alami (kecepatan angin, kelembapan udara dan temperatur ruangan) melalui simulasi pergerakan udara dan kondisi termal dalam bangunan. Simulasi akan dilakukan dengan menggunakan aplikasi Ecotect untuk membantu dalam proses desain. Hasil akhir penelitian berupa kriteria dan usulan desain arsitektural yang diharapkan dapat diterapkan pada bangunan rumah tinggal pasca pandemic.  

This research aims to find out the influence of discipline on employee performance in hospitals. Ibn Sina YBW Umi Makassar. The type of data used is qualitative and quantitative data, then the data source used, namely primary data and secondary data. The collected data is analyzed in a scriptive manner, meaning that the data obtained in the field is processed in such a way that it provides a systematic understanding, then statistical calculations are held with simple regression analysis, coefisen correlation coefficient of determination (r) and t-test, From the results of calculations obtained values of y = 17.51 + 0.63 x, while the value of correlation coefficient (r) of 0.527 and coefficient of determination (r2) of 27.77% and the remaining 22.23%  It is influenced by other factors that were not studied. While the results of the distribution are: t (t-table) = 2,034, from the calculation of the distribution t (thitung) = 3,562, so that it can be known t (thitung) > t table (3,562 > 2,034, so that Ha received and rejected H0, which means, discipline has a significant positive effect on employee performance in hospital. Ibn Sina YBW UMI Makassar.

ABSTRACT Background: Diet is aiming to lose weight can be done in various ways.During the adolescent anxiety problems against weight loss arising more happens than the other.The physical changes that occur in particular weight and body shape increases the risk of someone worrying about her weight. Purpose: This research was conducted aiming to know the behavior of young women about diet in SMA Negeri 5 Pekanbaru. Method: This research is quantitative type with anlitik design with coss sectional approach. This type of research is quantitative and deskriftif design. The population of this research as much as 444 people with 82 samples of respondents with the method of sampling Simple Random Sampling using univariate analysis.This research instrument using questionnaires and engineering research with primary data. Results: Based on the results of research that young women in SMA Negeri 5 Pekanbaru knowledgeable low as much as 42 respondents (51%), being negative as much as 43 respondents (52%), and the actions that go on a diet as much as 58 respondents (71%). Conclusion: For the respondent is expected to be more positive about the diet, and can do the diet properly and healthily.   Keywords: Behavior, Young Women, Diet   ABSTRAK Latar Belakang: Diet merupakan usaha yang bertujuan untuk menurunkan berat badan yang dapat dilakukan dengan berbagai cara. Pada masa remaja masalah kecemasan terhadap berat badan timbul lebih banyak terjadi dibandingkan masa kehidupan lainnya. Perubahan fisik yang terjadi khususnya berat badan dan bentuk tubuh meningkatkan risiko seseorang mencemaskan berat badannya. Tujuan:  Penelitian ini dilakukan bertujuan untuk mengetahui perilaku remaja putri tentang diet di SMA Negeri 5 Pekanbaru. Metode: Jenis penelitian ini bersifat kuantitatif dan berdesain deskriftif. Populasi penelitian ini sebanyak 444 orang dengan sampel 82 responden dengan metode pengambilan sampel Simple Random Sampling dengan menggunakan analisa univariat. Instrumen penelitian ini menggunakan kuesioner dan teknik penelitian ini dengan data primer. Hasil: Berdasarkan hasil penelitian bahwa remaja putri di SMA Negeri 5 Pekanbaru berpengetahuan rendah sebanyak 42 responden  (51%), bersikap positif sebanyak 43 responden (52%), dan tindakan yang melakukan diet sebanyak 58 responden (71%). Kesimpulan: Bagi responden diharapkan dapat bersikap yang lebih positif mengenai diet, dan dapat melakukan diet dengan benar dan sehat.  Kata kunci      :  Perilaku, Remaja Putri, Diet  

Latar belakang: Status gizi adalah salah satu ukuran keberhasilan dalam pemenuhan nutrisi pada ibu hamil. Salah satu akibat yang bisa ditimbulkan apabila asupan nutrisi tidak tercukupi pada ibu hamil dapat menyebabkan Kurang Energi Kronis (KEK). Wanita hamil berisiko mengalami KEK jika memiliki lingkar lengan atas (LILA) <23,5 cm. Pengetahuan ibu hamil tentang gizi bisa mempengaruhi ibu dalam pemenuhan nutrisi, sehingga mempengaruhi status gizi ibu hamil. Tujuan dari penelitian adalah untuk mengetahui hubungan antara pengetahuan tentang gizi dengan status gizi ibu hamil Metode: Penelitian ini menggunakan desain deskriptif korelasi melalui pendekatan cross-sectional. Cara pengambilan sampel dengan non probability sampling dengan teknik consecutive sampling. Jumlah sampel penelitian sebanyak 95 responden. Alat pengumpulan data yang digunakan adalah kuesioner  dan pengukuran LILA. Data dianalisis secara univariat dan bivariat dengan uji chi square. Hasil: Hasil penelitian menunjukkan bahwa ada hubungan yang signifikan antara pengetahuan tentang gizi dengan status gizi ibu hamil dengan nilai p= 0,001 Simpulan: Pengetahuan tentang gizi merupakan salah satu factor yang mempengaruhi status gizi ibu hamil. Dengan pengetahuan gizi yang baik maka ibu hamil cenderung memenuhi asupan nutrisi selama hamil sehingga status gizi juga baik. K    

Background: Sexually Transmitted Infections are diseases that are transmitted through sexual contact. Most of the sufferers of this disease are adolescents aged 15-24 years. The high risk factor for this disease is adolescents because of the usual premarital sexual behavior. Sexuall transmission disease are still a health problem in various countries. One of the reasons is the relatively low level of adolescent knowledge. The purpose of this study was to describe the level of adolescent knowledge about sexually transmitted infections in SMA Negeri 1 Singaraja. Method:  This research uses descriptive method with survey approach. The population in this study were teenagers in SMA Negeri 1 Singaraja with a sample of 293 samples. The sampling technique used in this study was simple random sampling. The measuring instrument in this study used a closed questionnaire with 30 questions. The data is then processed using SPSS. The data analysis method in this research is qualitative data analysis method. Results: The results of the 293 respondents, the knowledge of adolescents about sexually transmitted infections were mostly in the good category. Adolescents with a good level of knowledge were 260 respondents (88.7%), 30 respondents (10.2%) in moderate category, and 3 respondents (1.0%) in poor category. Conclusion: The majority of adolescents' knowledge level about sexually transmitted infections in SMA Negeri 1 Singaraja was in the good category as many as 260 respondents (88.7%). The results of this study are expected to be input for adolescents to always pay attention to their health and as an effort to prevent sexually transmitted infections.