p-Index From 2021 - 2026
5.766
P-Index
This Author published in this journals
All Journal PAUD Teratai Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Jurnal Ilmiah Mahasiswa FEB JOURNAL OF HEALTHCARE TECHNOLOGY AND MEDICINE Justek : Jurnal Sains Dan Teknologi KESMARS: Jurnal Kesehatan Masyarakat, Manajemen dan Administrasi Rumah Sakit Jurnal Studia Insania Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Jurnal EDUCATIO: Jurnal Pendidikan Indonesia JOMIS (Journal of Midwifery Science) Academy of Education Journal JURNAL MUTIARA KESEHATAN MASYARAKAT Al-Tamimi Kesmas: Jurnal Ilmu Kesehatan Masyarakat (Journal of Public Health Sciences) Jurnal Maternitas Kebidanan Jurnal Borneo Saintek Edukais : Jurnal Pemikiran Keislaman Indonesia Berdaya Colostrum Jurnal Kebidanan JKMM JIDAN (JURNAL ILMIAH KEBIDANAN) Warisan: Journal of History and Cultural Heritage Journal of Community Development and Disaster Management Life Science Jurnal Pengabdian Masyarakat : Pemberdayaan, Inovasi dan Perubahan DiJITAC : Digital Journal of Information Technology and Communication Jurnal Pengabdian Inovasi dan Teknologi Kepada Masyarakat Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) Mudabbir: Journal Research and Education Studies TAUJIHAT: Jurnal Bimbingan Konseling Islam Jurnal Salingka Abdimas Jurnal Keperawatan Duta Medika BOCAH: Borneo Early Childhood Education and Humanity Journal Scientica: Jurnal Ilmiah Sains dan Teknologi International Journal of Midwifery and Health Sciences Social Science Academic Jurnal Pengabdian Sosial El-Mujtama: Jurnal Pengabdian Masyarakat Midwifery Journal Reflektika
Claim Missing Document
Check
Articles

PELAKSANAAN BIMBINGAN PERKAWINAN BAGI CALON PENGANTIN PERSPEKTIF MASLAHAH MURSALAH (Studi Kasus di Kantor Urusan Agama Kecamatan Balerejo Kabupaten Madiun) Qomariah, Siti; Kadenun, Kadenun; Ayu, Diyan Putri
Social Science Academic Vol. 1 No. 2 (2023)
Publisher : Institut Agama Islam Sunan Giri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/ssa.v1i2.2941

Abstract

The existence of the pre-marital marriage guidance process is very important for the formation of the samawa family, the purpose of marriage and the importance of the perspective of maslahah mursalah in the marriage and the realization of a harmonious, peaceful and prosperous society both materially and spiritually, so that the problem formulation in this thesis is: 1 ) How is the implementation of Marriage Guidance for prospective brides at KUA, Balerejo District, Madiun Regency? 2) What is the perspective of maslahah mursalah on the implementation of Marriage Guidance for prospective brides at KUA Balerejo District, Madiun Regency? This study used a descriptive qualitative approach, with the type of research being case study research, located at the Office of Religious Affairs, Balerejo District, Madiun Regency. The data used were obtained from interviews, observation and documentation using qualitative data analysis techniques and checking the validity of the data obtained. Based on the results of the research, it was concluded that: 1) the implementation of marriage guidance for prospective brides of marriageable age is divided into 2 types, namely indirect guidance and face-to-face guidance (regular) conducted for 6 hours of lessons for 1 day with a minimum number of participants 10 pairs of prospective brides. 2) From the maslahah mursalah perspective on implementation From the maslahah mursalah perspective on the implementation of Marriage Guidance for prospective brides and grooms at KUA Balerejo District, Madiun Regency, in terms of law in Indonesia and according to the Shari'a and its continuity is relevant and in accordance with the rules and laws in our country.
TEMAN SEBAYA BERPENGARUH TERHADAP KEJADIAN GIZI LEBIH PADA REMAJA DI ERA PANDEMI COVID 19 Sartika, Wiwi; Herlina, Sara; Qomariah, Siti; Juwita, Sellia
MIDWIFERY JOURNAL Vol 1, No 4 (2021): Volume 1 Nomor 4, Desember 2021
Publisher : Universitas Malahayati Bandar Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/mj.v1i4.5626

Abstract

Background: The prevalence of overweight status in the adolescent age group continues to experience a sharp increase every year. Basic Health Research Data (Riskesdas) in 2013 showed the national prevalence of adolescents aged 13-15 years with excess body weight was 10.8%, of which 8.3% consisted of overweight and 2.5% obesity. While the prevalence of obesity based on place of residence shows as much as 10.4% occurs in urban areas and 8.1% occurs in rural areas. Objective: to find out the effect of the role of the tau people on overnutrition in adolescents during the Covid 19 pandemic. Methods: The research method used in this study was an analytical survey research method with a cross-sectional design. Methods The population in this study were all teenagers in Pekanbaru and a sample of 335 teenagers. The sampling technique is using Random Sampling where the sample is taken randomly as a respondent. The research instrument used was in the form of a questionnaire. Data processing procedures with Editing, Coding, Processing, Cleaning. Data analysis with univariate and bivariate with squahre test. The results: It is known that the majority of peer roles affect adolescent nutrition 127 people with (37.9%.) and the role of peers has no effect 208 with (62.01%) , P value 0.000.Conclusion: There is an Influence of the Role of Peers on Over Nutrition in Adolescents in the Era of the Covid 19 Pandemic in Pekanbaru.Suggestion The role of peers shows an influence on the incidence of overnutrition, especially for adolescents. Therefore, maintain a healthy diet with balanced nutrition  Keywords: The Role of Peers, Over Nutrition, Adolescents                ABSTRAKLatar Belakang: Prevalensi status gizi lebih pada kelompok usia remaja terus mengalami peningkatan yang tajam pada tiap tahunnya. Data Riset Kesehatan Dasar (Riskesdas) pada tahun 2013 menunjukkan prevalensi nasional remaja usia 13 – 15 tahun dengan berat badan berlebih sebesar 10,8%, yang mana 8,3% terdiri dari gizi lebih dan 2,5% obesitas. Sedangkan prevalensi kegemukan berdasarkan tempat tinggal menunjukkan sebanyak 10,4% terjadi di perkotaan dan 8,1% terjadi di pedesaan. Tujuan: adalah untuk mengertahui pengaruh peran orang tau terhadap gizi lebih pada Remaja dimasa Pandemi Covid 19.   Metode: Metode penelitian yangdigunakan dalam penelitian ini adalah metode penelitian survey analitik dengan designcross sectional. Populasi dalam Penelitian ini seluruh Remaja yang ada di Pekanbaru dan sampel sebanyak 335 Remaja. Tehnik pengambilan sampel  dengan menggunakan Random Sampling dimana sampel diambil secara acak sebagai responden. Instrument penelitian yang digunakan adalah berbentuk kuesioner. Prosedur pengolaan datadengan Editing, Coding, Processing,Cleaning. Analisis data dengan univariat dan bivariat dengan uji squahre. Hasil penelitian: Menunjukkan diketahui bahwa Mayoritas Peran Teman Sebaya berpengaruh  terhadap gizi Remaja127  orang dengan (37,9%.) dan Peran teman sebaya  tidak berpengaruh 208 dengan (62,01%) , P value 0,000. Simpulan:  Terdapat Pengaruh Peran teman sebaya Terhadap Gizi Lebih Pada Remaja diEra Pandemi Covid 19 di Pekanbaru.Saran Peran teman sebaya menunjukkan adanya pengaruh terhadap kejadian gizi lebih Khususnya untuk remaja. Oleh karena itu menjaga pola makan dengan makanan yang lebih sehat dengan gizi seimbang  Kata kunci: Peran Teman Sebaya, Gizi Lebih, Remaja
The Relationship Between Gadget Use And Socio-Emotional Development Of Preschool Children In Islamic Kindergarten Integrated Raudhatul Jannah Senapelan Alwashliyah Pekanbaru City Qomariah, Siti; Selvi Panggabean; Dewi Sartika Siagian
Jurnal Maternitas Kebidanan Vol. 10 No. 2 (2025): Jurnal Maternitas Kebidanan
Publisher : Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/jumkep.v10i2.7670

Abstract

Introduction According to WHO in 2020, there were at least 3.9 billion preschool-aged children using gadgets in the world. According to WHO in 2017, it was reported that 5-25% of preschool children experienced social emotional development disorders. The purpose of this study was to determine the relationship between gadget use and social emotional development in preschool children. This research method was correlational analytic with a cross-sectional approach, conducted at the Raudhatul Jannah Alwashliyah Senapelan Integrated Islamic Kindergarten, Pekanbaru City on May 27-June 3, 2025 with a population of 74 students. The sampling technique was purposive sampling, with a sample of 62 respondents. The instruments used were a gadget use duration questionnaire and KMME (Mental Emotional Problems Questionnaire). Data analysis used univariate frequency distribution analysis and bivariate Spearman rho statistical test (0.05). The results of the study stated that the Spearman rho statistical test produced ap value of 0.000 (p < 0.05), which means. So, it can be concluded that there is a relationship between the duration of gadget use and the social and emotional development of preschool children.
Deteksi Dini Anemia Pada Remaja Dengan Pemeriksaan Hemoglobin Sekolah Alam Cefa Islamic School Qomariah, Siti; Herlina, Sara; Sartika, Wiwi; Wulandini, Putri; Darmadi, Darmadi
JDISTIRA - Jurnal Pengabdian Inovasi dan Teknologi Kepada Masyarakat Vol. 2 No. 2 (2022)
Publisher : Yayasan Rahmatan Fidunya Wal Akhirah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58794/jdt.v2i2.226

Abstract

Anemia merupakan suatu keadaan ketika jumlah sel darah merah atau konsentrasi pengangkut oksigen dalam darah (HB) tidak mencukupi untuk kebutuhan fisiologis tubuh. Pada umumnya Anemia banyak terjadi pada kalangan remaja yang ditandai dengan gejala misalnya mudah, wajah pucat, nafsu makan berkurang, mudah mengantuk. Hal ini dapat menyebabkan aktivitas remaja dan prestasi belajar menurun. Tujuan dari pengabdian yang dilakukan ini adalah Meningkatkan pengetahuan dan pemahaman remaja mengenai anemia pada remaja dengan Pemeriksaan Hemoglobin di Sekolah alam CEFA Islamic School. Beberapa tahapan yang dilakukan diantaranya, Tahap I penyuluhan dan ceramah Tanya, Tahap II Praktik Pemeriksaan Hemoglobin dan Tahap III Evaluasi terhadap tentang Anemia pada Remaja. Di Sekolah alam CEFA Islamic School. Dari hasil pemeriksaan terhadap 12 peserta didik sekolah alam CEFA Islamic School terdapat 3 orang dengan anemia ringan, sedangkan 9 orang masih dalam kategori normal. Hasil evaluasi tahap 1 dengan memberikan questioner pretes dan post tes yaitu pemahanan peserta didik terkait anemia pada saat pretes yaitu 5 orang dengan nilai > 70 dan 7 orang < 70, sedangkan pada saat post tes 11 orang dengan nilai >70 dan 1 orang dengan nilai < 70. Ini menunjukkan para peserta didik mendapatkan pemahaman terkait anemia setelah paparan penyuluhan disampaikan.
Analisis dan Desain Pengembangan Bahan Ajar dan Sumber Belajar PAI Nasution, Ummi Nadrah; Qomariah, Siti; Halimah, Siti
El-Mujtama: Jurnal Pengabdian Masyarakat  Vol. 4 No. 5 (2024): El-Mujtama: Jurnal Pengabdian Masyarakat
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/elmujtama.v4i5.3307

Abstract

Textbooks and learning resources play a vital role in the educational process. They function as the primary media for delivering materials, concepts, and values to students. The aim of this research is to analyze and design the development of teaching materials and learning resources for Islamic Religious Education (PAI) using a qualitative research method of literature review. This study involves the collection and analysis of relevant literature to identify the strengths and weaknesses of existing PAI teaching materials, and to formulate innovative and effective design strategies. The analysis results indicate that current PAI teaching materials are often less contextual, less interactive, and have not fully utilized digital technology. The implications of this research include the need for policy support and teacher training to implement modern and effective teaching materials, thereby improving the quality of Islamic religious education in schools. This research is expected to serve as a reference for the development of more adaptive and innovative PAI teaching materials.
HUBUNGAN PENGETAHUAN TENTANG MANFAAT KOLOSTRUM TERHADAP KEJADIAN STUNTING PADA BALITA DI PUSKESMAS GARUDA PEKANBARU Sartika, Wiwi; Herlina, Sara; Qomariah, Siti
Jurnal Maternitas Kebidanan Vol. 9 No. 1 (2024): Jurnal Maternitas Kebidanan
Publisher : Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/jumkep.v9i1.5091

Abstract

Stunting is a public health problem that is associated with an increased risk of morbidity, death, and barriers to motor and mental growth (Rahmadhita, 2020). The incidence of stunting has increased from year to year. Global data shows that the incidence of stunting in 2018 is estimated at 21.9% or 149 million children under 5 years of age, while in Southeast Asia there are 14.4 million children under 5 years of age experiencing stunting. The aim of this research is to find out the relationship between knowledge about colostrum and the incidence of stunting at the Garuda Pekanbaru health center. This research is an analytical observational study with a cross-sectional design. The research population was all mothers who brought their toddlers to the Garuda Health Center, with a sampling technique using the accidental sampling method of 225 samples. This research was carried out at the Garuda Community Health Center from June to December 2023. The instruments used were a questionnaire and height measurement. Data collection techniques involve approaching respondents to obtain their consent as research objects. Data was collected through a questionnaire regarding demographic data and history of breastfeeding, followed by observation of the child's height adjusted for age using a z-score table. Based on the chi-square statistical test, a value of p=0.000 was obtained, which shows that there is a relationship between knowledge about the benefits of colostrum and the incidence of stunting in toddlers. It is recommended that mothers exclusively breastfeed according to the child's nutritional needs to prevent stunting. Key words: Toddlers, Colostrum, Stunting
Pengaruh Penggunaan Smartphone Terhadap Risiko Keterlambatan Bicara Pada Anak Pra Sekolah Di Puskesmas Payung Sekaki Herlina, Sara; Qomariah, Siti; Sartika, Wiwi
Jurnal Maternitas Kebidanan Vol. 9 No. 2 (2024): Jurnal Maternitas Kebidanan
Publisher : Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/jumkep.v9i2.5834

Abstract

Pendahuluan Anak adalah aset berharga bangsa karena mereka adalah generasi penerus yang harus berkualitas untuk memastikan masa depan yang cerah. Masa lima tahun pertama kehidupan adalah fase yang sensitif terhadap lingkungan. Menurut data dari World Health Organization Keterlambatan bicara dan bahasa di Indonesia tahun 2014 cukup tinggi, sebesar 9,54% dari seluruh populasi. Data penelitian di Amerika Serikat melaporkan bahwa jumlah keterlambatan bicara dan bahasa anak umur 4,5 tahun antara 5-8%. Menurut Kemenkes (2015) Keterlambatan bicara dan bahasa pada anak prasekolah 5-10%. Jumlah total balita di Indonesia adalah 24.006, sekitar 68% mengalami keterlambatan dalam bicara dan bahasa Tujuan Untuk mengetahui pengaruh penggunaan smartphone terhadap risiko keterlambatan bicara pada anak pra sekolah di puskesmas payung sekaki. Metode Penelitian ini merupakan jenis penelitian kuantitatif dengan desain penelitian analitik korelasi. Penelitian ini menggunakan metode cross-sectional. Populasi dari penelitian adalah semua anak yang berkunjung dipuskesmas payung sekaki Pekanbaru. Teknik pengumpulan sampel dalam penelitian ini menggunakan teknik accedental sampling. Hasil terdapat pengaruh penggunaan smartphone terhadap risiko keterlambatan bicara pada anak pra sekolah di puskesmas payung sekaki, dengan hasil signifikan atau ρ-value 00.0 dimana (p>0.05) sehingga dapat disimpulkan bahwa ada hubungan yang segnifikan antara pengaruh penggunaan smartphone terhadap risiko keterlambatan bicara pada anak pra sekolah di puskesmas payung sekaki Kata kunci: smart phone,keterlambatan bicara, anak
Effectiveness Of Baby Gym In Stimulating Motor Skills Rough Infants Aged 6–9 Months In Siak Hulu District In 2025 Qomariah, Siti; Sara Herlina; Wiwi Sartika
Jurnal Maternitas Kebidanan Vol. 10 No. 1 (2025): Jurnal Maternitas Kebidanan
Publisher : Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Infancy is a golden age and development period for babies. At the age of 6-9 months, the baby's gross motor skills begin by sitting without support then standing with support. Baby gym is a technique that stimulates growth, development, especially in gross motor skills for babies optimally. In Indonesia itself, 7.5% of babies experience developmental delays. Purpose This study aims to determine the effectiveness of baby gym in stimulating gross motor skills in babies aged 6-9 months. This research method uses a quasi experiment with a pre-test post-test one group research design. The sample in this study were babies aged 6-9 months, the sample size used in the study was 30 babies. Data collection was carried out by conducting observations and questionnaires that had been tested for validity and reliability. The results of the study stated that the effectiveness of baby gym in stimulating gross motor skills in babies aged 6-9 months was obtained with ap value of 0.000. So it can be concluded that there is effectiveness of baby gym in stimulating gross motor skills in babies aged 6-9 months.
“PENGARUH KINERJA KEUANGAN TERHADAP HARGA SAHAM (Studi Pada Perusahaan Makanan dan Minuman yang Listing di Bursa Efek Indonesia Periode 2011-2013)” Qomariah, Siti
Jurnal Ilmiah Mahasiswa FEB Vol. 4 No. 2
Publisher : Fakultas Ekonomi dan Bisnis Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengetahui dan menganalisis pengaruh kinerja keuangan perusahaan yang diukur menggunakan Return On Asset (ROA), Return On Equity (ROE), Earning Per Share (EPS), Economic Value Added  (EVA) dan Market Value Added (MVA) terhadap harga saham perusahaan makanan dan minuman yang terdaftar di Bursa Efek Indonesia (BEI) periode 2011-2013. Penelitian ini dilakukan karena masih terdapat perbedaan hasil penelitian pada beberapa penelitian terdahulu.Jenis penelitian ini adalah  Explanatory Research  yang menjelaskan hubungan antara variabel dependen dan independen.. Jenis data yang digunakan adalah data kuantitatif berupa laporan keuangan tahunan perusahaan makanan dan minuman yang terdaftar di bursa efek indonesia selama periode tahun 2011-2013. Populasi dalam penelitian ini berjumlah 16 perusahaan makanan dan minuman, kemudian sampel dipilih dengan metode purposive sampling yaitu berdasarkan kriteria tertentu sehingga   menghasilkan   sampel penelitian sebanyak 11 perusahaan makanan dan minuman. Analisis penelitian menggunakan analisis regresi linier berganda dan uji hipotesis menggunakan t test.Hasil penelitian menunjukkan bahwa secara parsial variabel ROA, ROE, dan EPS berpengaruh signifikan positif terhadap harga saham. Sedangkan  EVA dan MVA tidak memiliki pengaruh signifikan terhadap harga saham.Kata Kunci: Harga Saham, Return On Asset, Return OnEquity,         Earning Per Share, Economic Value Added, Market Value Added.
EFEKTIVITAS KOMPRES JAHE DAN KOMPRES AIR HANGAT TERHADAP INTENSITAS NYERI SENDI PADA LANSIA DI POSYANDU LANSIA (DESA MINOHOREJO KEC. WIDANG KAB. TUBAN) Qomariah, Siti; Ubaidillah, Moh
Jurnal Keperawatan Duta Medika Vol. 4 No. 1 (2024): Jurnal Keperawatan Duta Medika
Publisher : Universitas Duta Bangsa Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47701/dutamedika.v4i1.3440

Abstract

ABSTRACTJoint pain is a major problem that occurs in the elderly. Joint paint often lead to impaired mobility, independence functions, participation in activities social development, as well as quality of life and is one of the ten mein causes disability in the country is growing. The purpose of this study was to determine the effectiveness of ginger compresses and warm water compresses on the intensity of joint paint in the elderly at Elderly Posyandu (Minohorejo Village, Widang District, Tuban Regency).The research method used is quasy-experimental with a "nonequivalent control group design" research design. The research sample was 30 elderly in Elderly Posyandu, Minohorejo Village, which were selected by simple purposive sampling. The independent variable in this study was ginger compresses and warm water compresses, and the dependent variable of this study was the joint pain intensity. The instruments used are SOP and NRS sheets. The statistical test used in this study is the Paired Sample T-Test. The results showed that before being given abdominal stretching in the moderate pain category and after being given abdominal stretching in the mild pain category. From the statistical test results obtained p value = 0.000 at = 0.05 (p <0.05), indicating that there is an effect of abdominal stretching on reducing the intensity of dysmenorrhea pain in adolescents Dusun Pandan, Minohorejo Village, Kec. Widang Kab. Tuban. It is hoped that the elderly in Elderly Posyandu Minohorejo Village can play an active role in helping reduce the problems of joint pain, especially the other elderly in Minohorejo Village by teaching ginger compresses and warm water compresses.
Co-Authors ABdul Karim Batubara, ABdul Karim Alfitrah, M Yazid Al’ayyubi, Sholahuddin Anwar, Aida Choirul Anwari, Muhammad Irfan Apriansyah, Adam Hasyim Arriyanti, Eka Ayu, Diyan Putri Darmadi Darmadi Devi Risma Dewi Sartika Siagian Donalizarti, Donalizarti Elgara, Rendra Endang Sri Utami Fathur Rahman Febrian, M Agil Febrianita, Yulia Febryan, Muhammad Dimas Handayani, Fajar Sri Hapzi Ali Hasan Sazali Herlina, Sara Indradewa, Rhian Isnawati Isnawati Jarkasih Hrp, Ibnu Alwi Jumiyati Jumiyati, Jumiyati Juwita, Sellia K, Putri Halimaini Kadenun Kadenun, Kadenun Kinasih, Ayang Kusuma Wardany Larassati, Larassati Lisdiana Lisdiana liza, Nurma Lubis, Zulfahmi Mahariah Mardianto Mardianto Mariana, Erni Maryanti, Adelina Masdar Masdar Melia, Fransisca Putri Milsan, Haidar Muhlisatul Mahmudah, Muhlisatul Mulahela, Hamdani Muttaqien, Adi Yusuf Namira, Ananda Nasution, Indah Widya Jaya Putri Nasution, Itto Nesyia Nasution, Ummi Nadrah Nedriyan, Huli Sabpa Niallah, Shoffyah Athyah Ningsih, Gadis Yulia Nur Aisyah Nurmaliza, Nurmaliza nurul khotimah Rangan, Andi Yusika Ratih, Rini Hariani Relida, Nova Repi, Predi Ari Ria Novianti Rizwandi, Muhammad Roni Saputra, Roni Rosiana, Rizky Salwa, Samaratus Saniya, Saniya sapri sapri Sara Herlina Selvi Panggabean Setiono Setiono Shinta, Novelia Siagian, Dewi Sartika Sidoretno, Wahyu Margi Sirait, Azyana Alda Siti Halimah Suhendra, Afni Tasya Amelia Putri Siregar Teguh Ansori Ubaidillah, Moh Ummi Rosyidah, Ummi Utari, Anggie Sri Wahyuni, Siti Aisyah Wibowo, Arista Wiwi Sartika Wiwi Sartika Wulan Christijanti Wulandini, Putri Yunita Yunita Zaini Dahlan