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Because hydroponic plant nutrient is dissolved in the water, water quality management is essential for growing healthy plants. Taking care of the total dissolved solids (TDS) and the pH (water acidity) is essential. The purpose of this research is to create a IoT-based water quality monitoring device. The average TDS after 30 days of automation with an Arduino UNO was 1162.82 ppm, and the gadget kicked on the nutrient pump whenever the TDS fell below 1000 ppm or the EC fell below 2. The mechanism self-adjusts the pH when it falls below 5.5 or rises above 6.5, with a mean of 6.17.

Selection of high yielding and stable maize hybrid requires effective method of evaluation. Multienvironment evaluation is a critical step in plant breeding programs that is aimed at selecting the ideal genotype in a wide range of environments. A method of evaluation that combines a variety parameter of stability could provide more accurate information to select the ideal genotype. The aims of the study were (i) to identify the effect of genotype, environment, and genotype × environment interactions (GEIs) on maize hybrid yields and (ii) to select and to compare maize hybrids that have high and stable yields in diverse environments in Sumatra Island based on combined analysis, selection index, and GGE biplot. The study was conducted in five different environments in Sumatra Island, Indonesia, using a randomized complete block design repeated three times. Data were estimated using combined variance analysis, parametric and nonparametric stability, sustainability index, and GGE biplot. The results showed that the genotype had a significant effect on maize hybrid yields with a contribution of 41.797%. The environment contributed to 24.314%, and GEIs contributed 33.889% of the total variation. E1 (Karo, South Sumatra; dry season) and E3 (Tanjung Bintang, Lampung; dry season) were identified as the most ideal environments (representative) for testing the hybrids for wider adaptability. The maize hybrid with high and stable yields can be selected based on combined stability analysis and sustainability index as well as GGE biplot. These three methods are effectively selected high yielding and stable genotypes when they are used together. The three maize hybrids, namely, MH2, MH8, and MH9, are recommended as high yielding and stable genotype candidates.

A group of basket-woven craftsmen in Sungai Belidak Village, Sungai Kakap District, Kubu Raya Regency is community group located on Jl.H.Djelai RT.16 RW.01. This group has been running for two years and can increase women's income in the neighborhood by around 68% percent of the previous family income. The problem this group faces is from the marketing aspect is still using personal communication so that the product is still dependent on the order. Currently, the basket craftsman group has a market share of catering which during the pandemic, many of these businesses did not carry out their activities, causing sales from these baskets to drop drastically by 80% before the covid-19 pandemic; business management that is not yet running. So far, it has never been documented in the form of bookkeeping regarding business management that partners do so that the results have not been maximally obtained; as well as aspects of legality; parts of design management that partners control are still few, only one design/motif is being worked on; Branding is still weak. The method used is mentoring and training. The results obtained from the implementation of service are increased knowledge and skills of partners in managing digital-based craft businesses during the pandemic, transfer of science and technology to partners in the form of website creation, social media accounts, and online stores in the marketplace, transfer of technology to partners in the form of business management assistance and training, transfer of technology to partners in the form of product branding.

Air sangat penting bagi setiap makhluk hidup, tetapi dapat menyebabkan beberapa masalah yaitu banjir, kekeringan dan polusi air. Kawasan Sub DAS Cikeruh sering mengalami banjir terutama daerah kecamatan Rancaekek dan Bojongsoang sehingga merusak sarana dan prasarana umum serta menimbulkan kerugian harta. Dengan demikian, dilakukan analisis debit banjir untuk menentukan besarnya debit banjir rencana di Sub DAS Cikeruh. Tujuan dari penelitian ini adalah memperoleh simpangan nilai debit banjir rencana menggunakan metode Mean Annual Flood, metode Rasional, metode Der Weduwen, dan metode Haspers dengan debit banjir rencana data terukur. Penelitian ini menggunakan studi literatur dan menganalisis frekuensi curah hujan maksimum untuk mendapatkan debit banjir rencana pada Sub DAS Cikeruh. Hasil perhitungan data curah hujan menggunakan metode Mean Annual Flood, Rasional, Der Weduwen, dan Haspers pada analisis frekuensi data debit terukur didapatkan penyimpangan terkecil terjadi terhadap metode Mean Annual Flood yaitu sebesar 20,98% untuk periode ulang 2 tahun, 17,47% untuk periode ulang 5 tahun, 27,22% untuk periode ulang 10 tahun, 42,68% untuk kala ulang 20 tahun, 62,68% untuk periode ulang 50 tahun, dan 83,87% untuk periode ulang 100 tahun. Hasil penelitian ini berguna untuk mengetahui metode yang dapat digunakan sebagai referensi dalam menghitung debit banjir rencana serta menjadi pertimbangan dalam perencanaan pembangunan bangunan air.

Aktivitas pertumbuhan penduduk, perkembangan wilayah dan meningkatnya pembangunan infrastruktur secara langsung maupun tidak langsung dapat menyebabkan terjadinya penurunan daya dukung lingkungan khususnya daya dukung air yang sulit untuk dihindari. Penelitian ini bertujuan untuk menganalisis status daya dukung air berdasarkan neraca air meteorologis Thornthwaite Mather. Penelitian dilakukan di Sub DAS Cikeruh, DAS Citarum Hulu dengan luas wilayah 19.143,21 ha. Metode penelitian yang digunakan adalah metode deskriptif pendekatan kuantitatif, dengan cara menganalisis kondisi status daya dukung air yang merujuk kepada rasio ketersediaan air dan kebutuhan air sektor domestik, non domestik, pertanian, industri, peternakan dan perikanan. Hasil dari penelitian menunjukan status daya dukung air pada wilayah penelitian tahun 2020 bernilai telah terlampaui (overshoot). Kondisi tersebut menandakan bahwa neraca air dalam kondisi defisit dengan nilai ketersediaan air dalam satu tahun mencapai 193.583.337,01 m3/tahun dan nilai kebutuhan air untuk enam sektor mencapai 462.306.728,53 m3/tahun. Secara kuantitas nilai ketersediaan air di wilayah penelitian belum mampu untuk memenuhi kebutuhan air keenam sektor tersebut. Berdasarkan hasil analisis, ketersediaan air di Sub DAS Cikeruh hanya mampu memenuhi kebutuhan air untuk sektor domestik, non domestik, peternakan, perikanan, dan pertanian tetapi belum mampu memenuhi kebutuhan air industri.

Peningkatan jumlah penduduk disertai perubahan penggunaan lahan di Sub DAS Cikeruh akan mempegaruhi ketersediaan dan kebutuhan air serta tingkat pemenuhan air sektor krusial, yaitu: domestik, non-domestik, pertanian, industri, peternakan, dan perikanan. Penelitian ini bertujuan untuk memperoleh data terbaru ketersediaan dan kebutuhan air serta mengetahui kondisi neraca air di Sub DAS Cikeruh. Metode yang digunakan dalam penelitian ini adalah analisis deskriptif. Ketersediaan air dianalisis menggunakan metode mock dan ketersediaan air dianalisis menggunakan SNI 6728.1-2015, Surat Edaran Menteri PUPR (SE PUPR) Nomor 07 Tahun 2018, dan penelitian sebelumnya yang terkait. Hasil penelitian menunjukan total ketersediaan air di Sub DAS Cikeruh adalah 212.901.228,61 m3/tahun dengan ketersediaan air bulanan rata-rata 17.741.769,05 m3/bulan dan total kebutuhan air 462.306.728,53 m3/tahun dengan kebutuhan air bulanan rata-rata 38.525.560,71 m3/bulan. Sub DAS Cikeruh mengalami kekurangan air (defisit) sepanjang tahun. Defisit air tertinggi terjadi pada bulan Oktober yaitu -29.057.550,95 m3/bulan dan defisit terendah terjadi pada bulan Februari yaitu -1.459.819,23 m3/bulan. Ketersediaan air di Sub DAS Cikeruh hanya mampu memenuhi kebutuhan air sektor domestik, non domestik, peternakan, dan perikanan. Ketersediaan air di Sub DAS Cikeruh belum mampu mencukupi kebutuhan air sektor pertanian dan industri.

Sub DAS Cikeruh merupakan kawasan dengan laju pertumbuhan penduduk yang tinggi, yang mana hal tersebut mengakibatkan alih fungsi lahan terjadi di beberapa kecamatan sehingga berimplikasi terhadap menurunnya ketersediaan air dan meningkatnya kebutuhan air di Sub DAS Cikeruh. Penelitian ini bertujuan untuk mengetahui status daya dukung air di Sub DAS Cikeruh melalui perbandingan rasio antara kebutuhan dan ketersediaan air. Kebutuhan air dihitung dengan menggunakan standar yang ditentukan oleh SNI 19-66728.1, 2002; SNI 67281-2015; dan Ditjen Cipta Karya Dinas PU tahun 1996, adapun sektor yang dihitung adalah domestik, non domestik, industri, pertanian, peternakan, dan perikanan. Ketersediaan air dihitung dengan mengestimasi volume aliran yang terjadi di Sub DAS Cikeruh menggunakan metode Soil Conservation Service Curve Number (SCS-CN) dari USDA dengan melibatkan data hidrologi dari tahun 2011 hingga 2020. Hasil penelitian menunjukkan bahwa ketersediaan air di Sub DAS Cikeruh pada tahun 2020 adalah sebesar 351.852.088,9 m3/tahun, sedangkan kebutuhan air di Sub DAS Cikeruh mengalami perubahan yang dinamis setiap tahunnya. Kebutuhan air di Sub DAS Cikeruh pada tahun 2011 adalah sebesar 545.250.212 m3/tahun, tahun 2015 sebesar 711.121.596 m3/tahun, sedangkan tahun 2020 sebesar 520.638.257 m3/tahun. Hasil perhitungan menunjukkan bahwa terjadi defisit air di Sub DAS Cikeruh, dimana nilai kebutuhan air lebih tinggi dibandingkan ketersediaan air, adapun rasionya sebesar 0,641, yang artinya daya dukung lingkungan telah terlampaui (overshoot) karena nilai rasio < 1.

The greenhouse which is a building used to manipulate the micro-climate is an essential building for plant growth. Greenhouses have one or more devices that are used to monitor their internal environments against changes in micro-climate. The problem is that some devices are metal-based devices and plastics that can be deformed, such as electronic devices, one of which is a micro-climate monitoring device, so a shield that can protect the device but does not interfere with the sensor readings is needed. The purpose of this study was to make and test a plastic-based container called Duradus Junction Box, which has six removable ventilation openings to measure the micro-climate data. This study uses five Duradus Junction Boxes with different numbers of ventilation openings, a micro-controller connected to the air temperature and relative humidity sensor, and a MicroSD module to record all micro-climate data, all devices being then tested simultaneously for 30 days. Statistically, after using One Way ANOVA, this study found that micro-climate measurements result for actual devices data can be considered similar because the P-value for temperature (0.886) and relative humidity (0.917) is greater than alpha level of 0.05. However, when reading the recorded data for both parameters, it can be seen that micro-climate data inside all shields are slightly higher than actual microclimate data ranging from 1 to 2oC for air temperature and 1 to 3% for air relative humidity.

Pertambahan jumlah penduduk dan pembangunan yang terus meningkat menjadi permasalahan yang serius, terutama di wilayah perkotaan yang menjadi pusat perekonomian, pemerintahan, perdagangan dan perindustrian. Perubahan tata guna lahan akibat pembangunan dapat menyebabkan sebuah wilayah mengalami banjir dan genangan yang terjadi pada musim hujan. Sub DAS Cikeruh merupakan Sub DAS bagian dari DAS Citarum hulu. Wilayah Sub DAS Cikeruh dikenal sering mengalami musibah banjir. Penelitian ini bertujuan untuk menganalisis volume limpasan dan debit puncak Sub DAS Cikeruh. Analisis volume limpasan dan debit puncak menggunakan metode SCS-CN (Soil Conservation Service-Curve Number). Total volume limpasan permukaan (Q) Sub DAS Cikeruh pada kejadian hujan maksimum sebesar 102.8 mm tahun 2016 adalah 9 920 025 m3. Debit puncak (Qp) periode ulang 2 tahun sebesar 462.47 m3/s, periode ulang 5 tahun diperoleh sebesar 908.83 m3/s, periode ulang 10 tahun diperoleh sebesar 1 044.07 m3/s, periode ulang 25 tahun diperoleh sebesar 1216.63 m3/s, periode ulang 50 tahun diperoleh sebesar 1345,25 m3/s dan periode ulang 100 tahun diperoleh sebesar 1 472.96 m3/s. Hasil penelitian ini berguna untuk data awal sebagai penelitian lanjutan seperti pemodelan banjir dan pembuatan saluran pengendali banjir.

Infiltrasi merupakan proses masuknya air ke dalam tanah melalui pori-pori tanah yang dipengaruhi oleh tekstur tanah, kemiringan lereng, tata guna lahan dan lainlain. Pada Sub DAS Cikeruh terjadi alih fungsi lahan dan defisit air sehingga perlu dilakukan konservasi air. Penelitian ini bertujuan menganalisis laju infiltrasi berdasarkan tekstur tanah dan kemiringan lereng pada Sub DAS Cikeruh dengan metode Horton dan mengetahui faktor-faktor yang mempengaruhi laju infiltrasi di Sub DAS Cikeruh. Alat yang digunakan yaitu single ring infiltrometer. Metode yang digunakan dalam perhitungan adalah metode horton, dimana untuk pengukuran laju infiltrasi menggunakan metode infiltrometer. Hasil pengukuran dan perhitungan diketahui bahwa laju infiltrasi konstan tertinggi terdapat pada kemiringan lahan landai, tekstur tanah lempung liat berdebu dan jenis tanah kambisol yaitu 78.61 cm/jam (sangat cepat) dengan persamaan Horton 42.4+527.6e-0.766t. Laju infiltrasi konstan terendah terdapat pada kemiringan lahan datar, tekstur tanah liat dan jenis tanah gleisol yaitu 1.12 cm/jam (agak lambat) dengan persamaan Horton 0.8+59.2e-1.49t

Sub DAS Cikeruh mempunyai peranan yang sangat penting sebagai daerah resapan air. Meningkatnya laju pertumbuhan penduduk yang diikuti dengan perubahan fungsi tata guna lahan menyebabkan banjir dan berkurangnya resapan air tanah. Tujuan dari penelitian ini adalah untuk menganalisis kekritisan daerah resapan air di wilayah Sub DAS Cikeruh dengan metode skoring dan analisis spasial. Metode yang digunakan dalam penelitian ini adalah metode skoring dan tumpang susun atau overlay. Hasil analisis menghasilkan lima kategori potensi daerah resapan air, yaitu terdiri dari kondisi baik, normal alami, mulai kritis, agak kritits dan kritis. Kondisi kawasan resapan air dengan luasan terbesar yaitu seluas 40.14% dari luas wilayah daerah penelitian terdapat pada kondisi resapan mulai kritis. Kawasan ini tersebar di wilayah selatan Sub DAS Cikeruh yang merupakan persawahan dengan kemiringan yang datar. Kawasan potensi resapan air Sub DAS Cikeruh masih berfungsi baik dengan luasan 4 701.78 ha terdapat di wilayah utara Sub DAS Cikeruh yang merupakan kawasan hutan.

Evaluasi interaksi G x E melalui pengujian multilokasi merupakan tahapan penting untuk menentukan stabilitas dan adaptabilitas hibrida superior. Untuk menentukan interaksi G x E, stabilitas dan adaptabilitas hibrida jagung manis Padjadjaran di Jawa Barat, enam belas hibrida Padjadjaran dan dua hibrida komersial diuji di tiga lokasi selama dua musim yang berbeda di Jawa Barat- Indonesia. Hasil memperlihatkan bahwa biplot AMMI dapat dengan akurat menentukan interaksi G x E, stabilitas, dan adapatabilitas hasil hibrida jagung manis Padjadjaran di Jawa Barat. Biplot AMMI mengidentifikasi bahwa hibrida jagung manis Padjadjaran G 10 sebagai jagung manis yang stabil di berbagai lokasi pengujian dan musim di Jawa Barat, sedangkan hibrida jagung manis Padjadjaran G5 dan Padjadjaran G11 sebagai hibrida yang spesifik lingkungan. Biplot AMMI disarankan sebagai alat menentukan hibrida superior yang akan dilepas di Indonesia.Evaluation of genotype (G) x environment (E) interaction through multi-location testing is an important phase to determined stability and adaptability of superior hybrid. To determined G x E interaction, stability and adaptability of Padjadjaran sweet corn hybrids, sixteen new Padjadjaran sweetcorn hybrids and two commercial hybrids were tested in three locations for two different seasons in West Java, Indonesia. Results showed that AMMI biplot was accurately determined G x E interaction, stability and adaptability of Indonesian sweet corn in West Java for yield. The AMMI biplot determined Padjadjaran G 10 sweetcorn hybrid as a stable hybrid across locations and seasons in West Java, while Padjadjaran G5 and G11 as the specific environment hybrid. The AMMI biplot is suggested to implement as a tool to release particular superior hybrid in Indonesia. Key words : Adaptability, AMMI, G x E interaction, Sweetcorn, Stabilit

Entrepreneurship Development Program (PPK) at Muhammadiyah Pontianak University is a program with a mission to produce new entrepreneurs, through an integrated program involving students managing PPK and resource persons. PPK Muhammadiyah University Pontianak activities include: management training, business skills with the Start and Improve Your Business (SIYB) method consisting of Generate Business Idea (GBI), Start Your Business (SYB) and modules Improve Your Business (IYB) covering Marketing, Financial Planning, Bookkeeping, Purchasing, Stock Control and Financing in the context of empowering the potential of entrepreneurship for students. Students who have started entrepreneurship, Student Entrepreneurship Student Creativity Program (PKMK), alumni who are interested in or are just starting a business can perfect their previous entrepreneurial activities, to increase its business. Manager of PPK Muhamamdiyah University Pontianak will explore the types of tenant business commodities according to their talents and interests. The PPK program service unit at the Muhammadiyah University of Pontianak each year will produce at least five new science-based independent entrepreneurs per year who are ready to move in the community. The recruitment of PPK tenants is carried out through synergy with the Muhamamdiyah University Student Affairs in Pontianak to recruit students who get PKMK or other PKM, students and alumni who are pioneering businesses

Xylitol is a low-calorie, natural sweetener which has similar sweetness properties to sucrose. Xylitol can be produced from the hemicellulose hydrolysate of Oil Palm Empty Fruit Bunches (OPEFB). Several steps required for this process, including pretreatment, the hydrolysis of xylan to xylose and the reduction of xylose to xylitol. In a commercial market, xylitol is commonly found in the form of powder in order to maintain its distribution stability and practicality. The spray drying method is a drying method that is mostly used in dry or powder products manufacturing industry. This research aims to investigate the effect of spray drying and to determine proper inlet temperature and maltodextrin concentration on xylitol powder characteristics that are similar to the quality of commercially produced xylitol. Randomized Group Design Method is a data processing method used in this research which consisted of two factors: inlet temperature (160 o C and 180 o C) and maltodextrin concentrations (20%, 25%, and 30%). Based on the result of the research, the inlet temperature significantly affected the water content, solubility, hygroscopic levels and calorie content. Results also showed that maltodextrin concentration had a significant effect on the hygroscopic levels, water content and calorie content. Xylitol powder similar to the commercially produced xylitol was obtained from the inlet temperature of 160 o C and 20% of maltodextrin, with the water content of 5.17%, hygroscopic levels of 8.55%, solubility of 99.346%, calorie content of 2.71 cal/g and xylitol content of 0.034 g/L. Keywords : inlet temperature, maltodextrin, oil palm empty fruit bunch, spray drying, xylitol

Changes in land use are defined as the increasing of the use of the land from one side use to another followed by a reduced area, or changes in land function at different times. Land degradation and soil erosion are often associated with loss of forest cover, but also caused by poor land use practices (overgrazing, cleaning, land clearing and organic matter destruction clearing). The main aim of this work is to analyze the pattern of land cover changes to the total erosion in Cimanuk upstream sub- watershed. The results showed that there were some changes over the land from conserved area to cultivation area. Land use composition in 2009 of the studied area with a total of 146,847.4 ha: conserved and cultivation area are 13.78% and 86.32% respectively. Meanwhile, based on USLE calculation analysis, the total erosion in this sub-watershed reaches 103,475,098.62 ton from which erosion on the conserved areas and cultivated ones are 6,644,401.22 and 96,830,697.40 ton respectively. The relationship function of total erosion of the conserved areas (TEpt) to the width of this area (Aqt) is TEqt = (130.76 * Aqt) + (3 x 10‘) with R2 = 0.8288. On the other hand, relationship function of total erosion of the cultivation regions (TEgg) to the width of this area (ABB)is TEKB' (838.59 * AKB)" (2 x 107) with R2 = 0.8261. Based on the width of conserved and cultivation regions, and total erosion of respected study area projection, a monogram of land use changes and erosion was obtained from which can be used to predict land use changes pattern until 2050.

Tujuan penelitian ini adalah untuk mengetahui pengaruh BI-7 Day Repo Rate, Indeks Harga Saham Gabungan, Risiko Tidak Sistematis, dan Nilai Tukar terhadap Indeks Nilai Aktiva Bersih pada Reksa dana Campuran. Teknik pengambilan sampel yang digunakan dalam penelitian ini adalah metode purposive sampling. Berdasarkan kriteria pemilihan sampel yang telah ditentukan diperoleh jumlah sampel sebanyak 31 reksa dana. Alat analisis yang digunakan adalah uji asumsi klasik, regresi linier berganda, koefisien korelasi berganda, koefisien determinasi (R2), uji simultan (uji f), dan uji parsial (uji t).Berdasarkan hasil uji normalitas semua data terdistribusi normal, tidak ada multikolinieritas, tidak terjadi autokorelasi, tidak terdapat masalah heteroskedastisitas, dan terjadi linieritas. Berdasarkan nilai korelasi (R) yang diperoleh sebesar 0,228 yang berarti memiliki hubungan yang rendah. Berdasarkan nilai koefisien determinasi (R2) yang diperoleh sebesar 0,052. Hal ini berarti bahwa 5,2% pengaruh terhadap Nilai Aktiva Bersih dapat dijelaskan oleh BI-7 Day Repo Rate, Indeks Harga Saham Gabungan, Risiko Tidak Sistematis, dan Nilai Tukar. Berdasarkan hasil uji simultan (uji f) variabel BI-7 Day Repo Rate, Indeks Harga Saham Gabungan, Risiko Tidak Sistematis, dan Nilai Tukar secara bersama-sama tidak berpengaruh terhadap Nilai Aktiva Bersih pada Reksa dana Campuran. Selanjutnya Berdasarkan hasil uji Parsial (uji t) variabel BI-7 Day Repo Rate, Indeks Harga Saham Gabungan, Risiko Tidak Sistematis, dan Nilai Tukar secara parsial tidak berpengaruh terhadap Nilai Aktiva Bersih pada Reksa dana Campuran.

Identification of grain yields on stable and high yielding maize hybrids in a wide environment requires high accuracy. There were many stability measurement methods used in multi-environment experiments. However, the relationship between each measurement was still difficult to understand. The objectives of this study were to: 1. identified the effect of growing season, location, hybrids (genotypes), and their interactions (GEIs) on grain yields; 2. determined the relationship between each stability measurement; 3. selected the stable and high yielding maize hybrids in a wide environment; and 4. determined favorable (discriminativeness) locations for testing. The field experiment was conducted at eight locations in Java island, Indonesia during two seasons used a randomized completed block design with three replications. The experimental results showed that the main effects of growing season, location, hybrid, and GEIs, had a significant effect on maize hybrid yields. Stability measurements S(3), S(6), NP(2), NP(3), NP(4), and CVi, belong to the concept of dynamic stability that can be used to selected maize hybrids in favorable environments, while other measurements were classified as in the concept of static stability. Two maize hybrids were successfully selected to have high and stable yields based on numerical and visual measurements, namely SC3 and SC9. The two hybrids can be used as candidates for a sustainable maize development program. GJRS and KARS were the most discriminativeness environments. Both can be used as a favorable environment for selecting the ideal maize hybrid.

Tujuan dari penelitian ini adalah untuk mengetahui perbandingan portofolio optimal dengan menggunakan Model Single Indeks dan Model Markowitz dalam penetapan investasi saham pada perusahaan Manufaktur sektor industri barang konsumsi. Jenis penelitian yang digunakan adalah penelitian komperatif. Populasi dalam penelitian ini yang tergabung dalam perusahaan manufaktur sektor industri barang konsumsi yang berjumlah 51 emiten periode 2019 dan teknik pengambilan sampel yang digunakan adalah Purpusive sampling , yaitu sampel yang digunakan 48 emiten. Alat analisis yang di gunakan adalah analisis expected return, risiko dan perbandingan portofolio dengan Model Single Indeks dan Model Markowitz. Hasil dari penelitian ini menunjukkan pembentukan portofolio optimal menggunakan Model Single Indeks menghasilkan 20 kandidat dan Model Markowitz menghasilkan 9 kandidat saham. Dengan expected return portofolio yang dihasilkan Model Single Indeks sebesar 0,1437496% dan Model Markowitz yaitu sebesar 0,9009%. Risiko yang dihasilkan menggunakan Model Single Indek sebesar 0,0000407% dan Model Markowitz yaitu sebesar 0,0034%. Koefisien variasi menggunakan Model Single Indeks sebesar 0,0283131% dan hasil koefesien variasi Model Markowitz 0,3777%. Dengan menggunakan perhitungan terhadap Model Single Indeks dan Model Markowitz dapat disimpulkan bahwa hasil portofolio optimal Model Single Indeks dan Model Markowitz memiliki perbedaan dilihat dari nilai expected return yang dihasilkan. Model Markowitz memiliki nilai expected retrun yang lebih tinggi dari nilai expected return Model Single Indeks.

This research aim to identify the characteristics catchment area of jatiroke and present in the form of spatial data. The descriptive method was employed in this study. The results showed of Jatiroke catchment area was 5695,80 ha. Schmidt-Ferguson and Oldeman's classification of climate puts the climatic characteristics of the Jatiroke catchment area in the same group as type C and type C3. The Jatiroke catchment area has an elongated and narrow shape (like a bird feather), which impacts the amount of water that enters the river. The Jatiroke catchment area has an elongated and narrow drainage pattern and is shaped like a bird's feather based on the characteristics of the watershed. Land cover in the Jatiroke catchment area is dominated by forest mixed covering an area of 1615 ha with a percentage of 28%. Andosol and Kambisol soil types are found in the Jatiroke catchment area. Kambisol soil type dominates with an area of 3245.57 ha with a percentage of 57% of the total area. The slope of the Jatiroke catchment area is dominated by moderately steep and steep slope classes with an area of 3905.4 ha and 3278.2 ha, respectively, with an area presentation of 27.75% and 23.29%.

The Covid-19 pandemic that occurred had an impact on various aspects of life, including Small and Medium Enterprises (UKM) in Rasau Jaya Satu Village. UKM Mekar Sari and Sekapur Sirih which are engaged in the production of rengginang, marning corn, rice crackers and tofu chips have also been affected by this pandemic. Limitations in marketing that currently cannot conventionally lead to a decrease in partner income. Another problem is the partners' ignorance of online marketing strategies. The solution carried out by the LPPM UM Pontianak service team is by socializing the strategy and providing online web marketing through the partner village development program (PPDM) in the third year. The method of activity uses lectures and demonstrations of online web marketing management. This service activity was carried out well. There was an increase in the knowledge of the target audience before and after this service activity was carried out. The village government needs to provide assistance through Village-Owned Enterprises (BumDes) so that online marketing continues to run optimally.

The effect of heat moisture treatment (HMT), annealing (ANN), and dual retrogradation (DR) on functional and pasting properties, digestibility of starch components of banana flour comprising rapidly digestible starch (RDS), slowly digestible starch (SDS) and resistant starch (RS) has been investigated, using native banana flour (NBF) as a control. Crystal type, relative crystallinity and morphological changes were characterised by XRD and SEM. HMT has markedly modified the pasting properties and resulted in the highest SDS content. HMT and ANN increased the relative crystallinity but DR decreased it. HMT and DR altered XRD patterns from B to A and A + B type respectively, while ANN did not change the XRD patterns. The NBF compact granule surface remained unchanged with ANN but changed to a more porous surface with HMT and DR, thereby increasing the digestibility. Crystal type and granule morphology affected the digestibility while relative crystallinity might change the pasting point.

Corn waste, tithonia and cattle manure are three materials that have different characteristics. These charactersitics differences if used together in the composting process will complement each other and potentially produce good compost. This research was conducted to find out how the composting process characteristics by utilizing the three raw materials with different characteristics in a composting process. The composting process was carried out using a berkeley method which was stacked with a layered bioreactor. The decomposition process that occurs involving decompisted bacteria, so the composting process runs aerobically. Aerobic composting corn waste with the addition of tithonia and cattle manure finished in about 4-5 weeks to become a mature compost. The quality of the compost produced is quite good because the content contained in compost fulfills most of the quality standards regulated in SNI 7763: 2018. The addition of tithonia and cattle manure has a positive impact in the process of composting corn plants in terms of duration and good compost. Key words : aerobic, cattle manure, composting, corn waste, tithonia

The change in global climate has shown us the importance of sustainable environmental monitoring, especially the microclimate in greenhouses. Monitoring is carried out to determine greenhouse data, which differs from outdoor. Internet of Things (IoT) as emergence technology has an important role in collecting microclimate data, IoT is developed using hardware, sensors and software connected to the internet network. This paper implements this by using Arduino UNO, Raspberry Pi, DHT11 microclimate sensor to gain microclimate data and store it in cloud applications. Microclimate changes are recorded every minute and displayed on a web page so it can be analysed without visiting the greenhouse. The test results showed that the data recording was successfully carried out, and the microclimate data analysis showed that in the greenhouse there was a weak association between temperature and relative humidity with an R squared of 0.534.

Pemberian pupuk N dapat secara efektif meningkatkan hasil tanaman. Namun cara pemupukan N yang tidak tepat, dapat menyebabkan tidak efisiennya pemupukan. Penelitian ini bertujuan untuk mengetahui pengaruh dosis dan waktu aplikasi urea terhadap hasil, serapan dan efisiensi pemupukan N ( 15 N) pada tanaman jagung manis. Penelitian dilaksanakan pada bulan Maret sampai November 2018 di rumah kaca dan laboratorium. Percobaan pot menggunakan Rancangan Acak Kelompok pola Faktorial. Faktor pertama adalah dosis pupuk nitrogen yang terdiri dari 3 taraf perlakuan: (1) urea sebesar 60 ppm N, (2) urea sebesar 70 ppm N, dan (3) urea sebesar 80 ppm N. Faktor kedua adalah waktu aplikasi: (1) dua kali, (2) tiga kali, dan (3) empat kali. Hasil penelitian menunjukkan bahwa sebagian besar (50,7-54,4 %) N yang diserap tanaman jagung berasal dari pupuk urea (%Nbdp), sisanya (49,3-47,6 %) berasal dari tanah (%Nbdt). Pemupukan urea dosis 60 ppm N (ekivalen dengan 250 kg ha -1 ) menyebabkan efisiensi pemupukan N tertinggi (82,7%). Nilai efisiensi pemupukan secara signifikan menurun seiring peningkatan dosis urea, tetapi tidak berpengaruh nyata terhadap bobot hasil. Dosis urea juga berpengaruh signifikan terhadap nilai %N tanaman berasal dari pupuk (%Nbdp) dan %N tanaman berasal dari tanah (%Nbdt). Sedangkan waktu pemupukan hanya berpengaruh terhadap %Nbdp dan %Nbdt. Efisiensi pemupukan N tanaman jagung pada penelitian ini adalah sebesar 55,6-82,7 %. Hal ini berarti sebagian besar pupuk urea ( 15 N) yang diaplikasikan telah diserap oleh tanaman. Abstract. Application of N fertilizers can effectively increase crop yields. However, improper fertilization management, can cause inefficient fertilization. This study was conducted to evaluate the effect of rates and split application of urea on yield, N uptake and fertilizer N ( 15 N) use efficiency (FNUE) of sweet corn plants. The study was conducted from March to November 2018 at the greenhouse and laboratory. The pot experiment was designed using Factorial Randomize Block Design. The first factor was urea fertilizer dose: (1) 60 ppm N, (2) 70 ppm N, and (3) 80 ppm N. The second factor was split of application: (1) two times, (2) three times, and (3) four times. The results showed that most (50.7-54.4 %) of the N absorbed by corn plants came from urea fertilizer (%Ndff), and the rest (49.3-47.6 %) came from soil (%Ndfs). The rate of 60 ppm N (uquivalent to 250 kg ha -1 urea) caused the highest (82.7%) FNUE. The FNUE value significantly decreased with increasing dose of urea, but did not significantly affect the dry weight yield. The rate of urea also has a significant effect on the value of %N derived from fertilizer (%Ndff) and %N derived from soil (%Ndfs). Meanwhile, splitting fertilization time only significantly affected %Ndff and %Ndfs. In general, fertilizer N use efficiency in this study was between 55.6% with 82.7%. This means that most of the urea ( 15 N) fertilizer applied has been absorbed by plants.

Xylitol, a low-calorie sugar made up of five carbon atoms, had the valuable characteristics suitably applied for pharmaceutical and food industries. This sugar can be produced from oil palm empty fruit bunches (OPEFB) through hydrolysis and followed by fermentation. The xylitol in the fermentation broth requires the downstream process to obtain the final product with high purity and yield. Among a series of xylitol downstream process, crystallization becomes a critical step since this process determines the properties of final products. The objective of this study was to evaluate the effect of evaporation temperature (55°C and 70°C) and seeding addition (0%, 0.1%, 0.5%, 1 %) in the crystallization step on the physicochemical properties of xylitol crystals obtained from the OPEFB hydrolysate. The main evaluation criteria were crystal contents, purity, melting point, water content, hygroscopicity, solubility, caloric content, and crystal xylitol yield. The result showed that the crystal form obtained was relatively sticky and had lower purity than commercial ones because the concentration of xylitol solution increased after evaporation. The differences of physicochemical properties of the crystals such as the purity, porosity, yield and crystal form were influenced by evaporation temperature. The crystals formed by 70°C evaporation temperature produced the crystals with higher caloric value and purity, but it had lower hygroscopicity and moisture content than crystals formed by 55°C. However, the percentage of seeding gave an insignificant impact on xylitol crystal properties.

Salah satu permasalahan budidaya di lahan kering adalah keterbatasan ketersediaan air untuk irigasi. Hal ini menyebabkan petani lahan kering umumnya hanya melakukan satu kali tanam dalam satu tahun. Salah satu upaya untuk mengatasinya adalah dengan menerapkan teknologi pemanenan air hujan atau air limpasan. Untuk meningkatkan produktivitas air hujan yang dipanen dibutuhkan suatu usaha dalam menghemat penggunaan air. Pengaturan jadwal irigasi berdasarkan analisis neraca air lahan harian diharapkan dapat meningkatkan nilai produktivitas air dilahan kering. Tujuan penelitian ini adalah mengkaji penjadwalan irigasi menggunakan neraca air lahan harian pada budidaya ubi jalar (Ipomea batatas L) varietas rancing. Penelitian ini dilaksanakan di kebun penelitian Ciparanje, Kampus Universitas Padjadjaran, Jatinangor pada bulan Juli sampai November 2018. Penelitian ini dilakukan menggunakan batas deplesi 20% dengan total pemberian irigasi sebesar 9.285,6 liter sedangkan deplesi 30% adalah sebesar 8.687 liter. Substitusi kebutuhan air tanaman dengan deplesi 20% dapat memenuhi 129 m2 luasan areal budidaya, sedangkan deplesi 30% dapat memenuhi 138 m2 luasan areal budidaya selama satu musim tanam. Berdasarkan hasil penelitian ini menunjukkan bahwa kebutuhan air tanaman selama satu musim tanam dapat terpenuhi dari jumlah volume air yang terdapat dalam kolam pemanenan air limpasan. Kata kunci : penjadwalan irigasi, neraca air lahan harian, lahan kering, ubi jalar.

The 21st century became the beginning of the development of information technology, where one of the revolutions was the presence of the Internet of Things. Internet of Things or abbreviated as IoT is a technology that combines electronic devices, sensors, and the internet to manage data and applications. The Internet of Things can be adopted in agriculture for crop management as a media for monitoring and controlling, especially in greenhouses and is called Precision Farming. The application of precision farming will be more effective in a greenhouse because it is easier to engineer similar environmental conditions. IoT development in greenhouses is using Arduino Microcontroller or Raspberry Pi Microcomputer. These devices are used because the price is low and easy to get on the market and can be designed so that technicians who have limited information technology knowledge can run it. To be able to manage greenhouses with IoT requires sensors as five senses that can detect changes that occur in the greenhouse. By using sensors, the hardware can detect what is happening in the greenhouse and make decisions based on the data acquired. Some sensors that are often used in Precision Farming are temperature and humidity sensors, soil moisture sensors, and light sensors. In the Internet of Things, the data that has been acquired by the hardware will then be transmitted wirelessly. The wireless connections used are Bluetooth, ZigBee Protocol, and Wi-Fi, where Bluetooth and Zigbee connections have a short distance between 10 - 100 meters, while Wi-Fi has a longer distance especially when connected to the Internet. The purpose of this paper is to understand the advantages and challenges of adopting IoT-based Precision Farming for monitoring and automation.

Tujuan penelitian ini adalah untuk mengetahui pengaruh rasio keuangan terhadap Return On Assets , yang menggunakan rasio Non Performing Loan dan Biaya Operasi Pendapatan Operasi. Teknik pengambilan sampel yang digunakan dalam penelitian ini adalah metode purposive sampling . Untuk analisis statistik yang digunakan adalah analisis regresi linier berganda, analisis koefisien korelasi berganda, analisis koefisien determinasi (R 2 ), uji pengaruh simultan (F) dan uji pengaruh parsial (t). Berdasarkan hasil uji normalitas bahwa semua data n bahwa terdistribus i normal dengan asymp.Sig. (2-tailed) 0,200 > 0,05. Berdasarkan nilai R (korelasi) yang diperoleh sebesar 0,222. Berdasarkan nilai koefisien determinasi (R 2 ) yang diperoleh sebesar 0,049. Hal ini menunjukka4,9% pengaruh terhadap Return On Assets (ROA) dapat dijelaskan oleh variabel Non Performing Loan (NPL) dan Biaya Operasi Pendapatan Operasi (BOPO). Sedangkan sisanya 95,1% dipengaruhi oleh variabel lainnya yang tidak diteliti dalam penelitian ini.Berdasarkan nilai F dapat diketahui secara bersama-sama variabel independen tidak berpengaruh secara signifikan terhadap variabel dependen. Hal ini dibuktikan dari nilai F hitung sebesar 0,778 serta memiliki nilai signifikansi sebesar 0,468 yang lebih besar dari 0,05. Hasil dari uji t (parsial) variable Non Performing Loan (X1) dan Biaya Operasi Pendapatan Operasi (X2) tidak memiliki pengaruh yang signifikan terhadap ROA (Y).

Kelompok UKM Mekar Sari merupakan kelompok yang berada di Desa Rasau Jaya 1 yang melakukan usaha produksi rengginang. Permasahan yang dihadapi UKM tersebut adalah masih kemasan produk yang masih sederhana, dan proses produksi rengginang yang masih konvensional, terutama pada proses pengeringan. Hal ini akan menjadi permasalahan serius jika musim hujan tiba, produk yang dihasilkan terancam busuk sehingga menyebabkan kerugian yang besar. Selain itu, hygiene sanitasi anggota kelompok masih belum memenuhi syarat kesehatan. Target kegiatan ini adalah anggota kelompok memiliki kemampuan dan keterampilan dalam mengemas produk menjadi lebih menarik dan memenuhi syarat pemasaran, serta dapat menerapkan tenologi tepat guna berupa mesin pengering serba guna. Berdasarkan hal tersebut, maka perlu introduksi teknologi mesin pengering serba guna, dan pembelajaran dengan materi yang berkaitan dengan masalah yang dihadapi. Pembelajaran disampaikan dengan metode pendekatan sosialisasi, pelatihan, demonstrasi, dan pendampingan. Hasil kegiatan ini adalah pelaksanaan PPDM di kelompok UKM Mekar Sari (Rengginang) mendapat respon positif dari anggota kelompok. Hal ini terlihat dari antusiasme seluruh anggota kelompok mengikuti kegiatan dari awal sampai akhir, selanjutnya secara mandiri menerapkan introduksi IPTEKS yang diberikan dalam pengolahan dan pengemasan produk yang dihasilkan (Rengginang) dan tersedianya mesin pengering serbaguna serta meningkatkan pengetahuan dan keterampilan anggota kelompok dalam meneapkan hygiene sanitasi makana. Kemasan produk yang dihasilkan sudah menarik, tersedia PIRT, dan bahan yang digunakan.

This study aims to determine the effect of satisfaction on consumer loyalty using the Pontianak Graha Futsal Center field. This study uses descriptive method with data collection techniques consisting of observation, interviews, and questionnaires. The population in this study were all consumers who used the Pontianak Graha Futsal Center field service. The sample used in this study was 100 people with purposive sampling technique, namely sample collection techniques with the following considerations: had used Pontianak Graha Futsal Center field services at least 2 (two) times, and consumers made payments on their own behalf. The validity of X (satisfaction) and Y (consumer loyalty) test results are declared valid. Based on the reliability test shows the value of Cronbach’s alpha on satisfaction variable (X) is 0.813 greater than 0.60. Therefore, the reliability test on satisfaction variable is reliable, while the reliability test results of the consumer loyalty variable (Y) shows the value of Cronbach’s alpha of 0.793 greater than 0.60. Therefore, reliability testing on consumer loyalty (Y) is also reliable. For the regression equation of this study, which can be arranged in the regression equation Ŷ = 1.836 + 0.693X. the correlation coefficient (R) obtained is 0.462. the coefficient of determination (R2) or R Square is 0.206.

The purpose of this study was to determine the effect of variable Operating Leverage, Financial Leverage and partial leverage on Earning Per Share. The data used in the study is secondary data, obtained from the IDX, namely the financial statements from 2014-2016. The population used in this study amounted to 48 service companies in the property and real estate sub-sectors that are still listed on the Indonesia Stock Exchange in the 2014-2016 period. The sample selection technique uses purposive sampling method and obtained 41 service companies in the property and real estate sub-sectors used as samples. The data analysis technique used is multiple linear regression analysis. Based on the results of data analysis, partially Operating Leverage had no effect on Earning Per Share, Financial Leverage did not affect Earning Per Share, and Combination Leverage did not affect Earning Per Share. Simultaneous test results show that the regression model can be used to predict Earning Per Share as evidenced by a significant value of F of 0.988. R-Square value of 0.001 shows that the ability of independent variables in explaining the variation of the dependent variable is 0.1% and the remaining 99.9% is explained by other variables outside the research model.