scholarly journals KUALITAS FESES DAN PRODUKSI BIOGAS KAMBING KEJOBONG MUDA DAN DEWASA YANG DI BERI PAKAN DENGAN IMBANGAN KONSENTRAT DAN HIJAUAN YANG BERBEDA

MEDIAGRO ◽  
2021 ◽  
Vol 17 (2) ◽  
Author(s):  
Akhmad Nurahkman ◽  
Nadlirotun Luthfi ◽  
Sutaryo Sutaryo ◽  
Agung Purnomoadi
Keyword(s):  
Nested Design

Tujuan dari penelitian ini yaitu untuk mengkaji produksi biogas dari feses Kambing Kejobong muda dan dewasa dengan imbangan konsentrat dan hijauan yang berbeda. Materi yang digunakan yaitu 8 ekor kambing Kejobong jantan umur muda (± 5 bulan) dengan bobot badan (BB) awal rata-rata 14,03 ± 1,46 kg (CV 10,43%) dan 8 ekor kambing dewasa (± 9 bulan) dengan BB awal rata-rata 22,32 ± 1,99 kg (CV 8,92%). Pakan diberikan dalam bentuk pellet terdiri dari hijauan rumput Kolonjono (Panicum muticum) dan konsentrat (gaplek, bungkil kedelai, molases, dedak padi dan mineral mix). Penelitian menggunakan metode Nested Design yaitu perlakuan pakan tersarang dalam perakuan umur. Perlakuan pakan T1 tersebut adalah (30% konsentrat :70% rumput), sedangkan pakan T2 (30% rumput :70% konsentrat). Variabel yang diamati yaitu produksi feses, kualitas feses ternak dan produksi biogas. Data yang diperoleh dianalisis dengan uji F. Hasil penelitian menunjukkan bahwa produksi biogas berbeda nyata, produksi biogas pada T1 lebih tinggi dibandingkan produksi biogas T2 (P

scholarly journals Assessment of the Adequacy of Gauge Repeatability and Reproducibility Study Using a Monte Carlo Simulation

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Chunghun Ha ◽  
David S. Kim ◽  
SeJoon Park
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
System Analysis ◽  
Performance Metrics ◽  
Repeated Measurements ◽  
Percentage Error ◽  
Nested Design ◽  
Reproducibility Study ◽  
Measurement System Analysis ◽  
Repeatability And Reproducibility

ANOVA gauge repeatability and reproducibility study is the most popular tool for measurement system analysis. Two experimental designs can be applied depending on the durability of the objects. If repeated measurements are possible or sufficient homogeneous nonrepeatable samples are available, crossed design is appropriate; otherwise, nested design should be used. In this paper, we investigated the adequacy of ANOVA gauge repeatability and reproducibility study from the perspective of practitioners. We proposed a Monte Carlo simulation that is close to the realistic procedure to evaluate the adequacy of both structures. During the evaluation, we considered the average performance metrics, percentage of correct decision, histogram shape, and symmetric mean absolute percentage error for the four popular performance metrics, namely, % Study Variation, % Contribution, % Tolerance, and the number of distinct categories. The experimental results show that the nested design fails to judge the precision of the gauge while the crossed design succeeds.

scholarly journals Pengaruh Suhu Ruang Simpan dan Perlakuan Pasca Penyimpanan terhadap Mutu dan Produktivitas Umbi Benih Bawang Merah (Allium cepa L. group Aggregatum)

2018 ◽  
Vol 9 (2) ◽  
pp. 111-121
Author(s):  
Alvita Sekar Sarjani ◽  
Endah Retno Palupi ◽  
Muhammad Rahmad Suhartanto ◽  
Y. Aris Purwanto
Keyword(s):  
Ambient Temperature ◽  
Chilling Injury ◽  
Storage Period ◽  
Flowering Plant ◽  
Nested Design ◽  
Vigor Index ◽  
Allium Cepa L ◽  
Total Damage ◽  
Direct Change

ABSTRACTThe fluctuative price of shallot in Indonesia is mainly due to discontinuous supply. Shallot is usually planted three times a year. Lack of supply occurs during July to October. Therefore, the produce need to be stored to ensure its availability during off season, not only for consumption but also as seed bulb for the following planting season. The research was aimed to maintain the quality of seed bulbs during twelve weeks storage and to evaluate productivity of the seed bulbs after storage. Shallot seed bulbs of Bima Brebes was used for the research that was devided into two steps. The first step was arranged in nested design, in which seed bulb was stored at 0 0C, 5 0C, 10 0C and ambient temperature nested into storage period i.e 0, 3, 6, 9 and 12 weeks with four replications. The second step was evaluation of productivity of the seed bulbs that was arranged in nested design. The seed bulbs, after being stored at diferent condition, was subjected to different acclimatization treatments i.e. gradual increase of temperatures for 3 days and direct change to ambient temperature for one day, to devernalize the seed bulbs and replicated our times. The results showed that the dormant period of shallot seed bulbs lasted for 8 weeks after harvest (6 week after storage) as indicated by germination and vigor index of >90%. The termination of dormancy coincided with a rise in GA, IAA and cytokines as well as ABA. Storing the seed bulbs for 3 months in 5 0C could maintain its viability and vigor >90%, with 9.8% of total damage and 15.6% of weight loss. The seed bulbs grew normally and produced 30.2 g of bulb per plant. The percentage of flowering plant of gradually acclimatized seed bulbs previously stored at 5 0C (10.3%) was not significantly different from those directly acclimatized at ambient temperature (12%).Keywords: ABA, cytokinin, dormancy, GA, weight lossABSTRAKPenyebab utama fluktuasi harga bawang merah di pasar adalah ketersediaan umbi bawang merah yang tidak stabil. Di daerah sentra produksi, bawang merah ditanam tiga kali dalam setahun. Bulan Juli sampai Oktober adalah periode hasil panen rendah. Penyimpanan umbi merupakan salah satu upaya untuk menjamin ketersediaannya di luar musim panen, tidak hanya untuk konsumsi tetapi juga memastikan ketersediaan umbi sebagai benih pada musim tanam selanjutnya. Penelitian ini bertujuan mempertahankan kualitas benih umbi selama 12 minggu disimpan dan mengevaluasi produktivitasnya setelah penyimpanan. Bahan yang digunakan adalah benih umbi bawang merah varietas Bima Brebes. Penelitian dibagi dalam dua tahap. Tahap pertama adalah penyimpanan benih umbi dirancang dalam nested design yang mana benih umbi disimpan pada suhu 0 0C, 5 0C, 10 0C dan suhu ruang tersarang pada waktu penyimpanan yang terdiri atas 0, 3, 6, 9 dan 12 minggu dan diulang empat kali. Tahap kedua adalah evaluasi produktivitas benih umbi setelah disimpan dirancang dalam nested design. Umbi yang telah disimpan (12 minggu) pada masing-masing kondisi simpan diberi perlakuan aklimatisasi, yaitu suhu berjenjang (3 hari) dan suhu ruang langsung (1 hari), untuk mencegah pembungaan. Setiap perlakuan diulang sebanyak empat kali (ulangan tersarang pada aklimatisasi). Hasil penelitian menunjukkan bahwa benih umbi mengalami dormansi sampai 8 minggu setelah panen (6 minggu setelah simpan), ditandai dengan daya berkecambah dan indeks vigor di atas 90%. Berakhirnya dormansi benih umbi bersamaan dengan peningkatan kandungan giberelin, auksin, dan sitokinin mengimbangi peningkatan asam absisat. Penyimpanan benih selama 12 minggu pada suhu 5 0C dapat mempertahankan viabilitas dan vigor di atas 90% dengan kerusakan (umbi bertunas, chilling injury, hampa atau busuk) sebesar 9.8% dan susut bobot sebesar 15.6%. Setelah disimpan selama 12 minggu benih dapat tumbuh normal dan memproduksi 30.2 g umbi per tanaman. Aklimatisasi suhu berjenjang umbi benih yang telah disimpan pada suhu 5 0C menghasilkan persentase pembungaan (10.3%) yang tidak berbeda nyata dengan aklimatisasi suhu ruang langsung (12%).Kata kunci: ABA, dormansi, GA, sitokinin, susut bobot

Multiple-band terahertz filter device using coupling effect of two nest metallic split-ring resonators

2020 ◽  
Vol 34 (21) ◽  
pp. 2050211
Author(s):  
Pengcheng Lou ◽  
Chao Tang ◽  
Qingshan Niu ◽  
Yuanhao He ◽  
Ben-Xin Wang
Keyword(s):  
Coupling Effect ◽  
Design Method ◽  
Ring Resonators ◽  
Quality Factors ◽  
Terahertz Waves ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Nested Design ◽  
Multiple Band ◽  
Terahertz Filter

Multiple-band terahertz filter device consisting of two different-sized metallic split rings with the nested design method is proposed and investigated in this paper. Five separated filtering resonant dips having different resonance amplitudes and quality factors are gained, which are mainly attributed to the hybrid coupling effect between the two nested split-ring resonators. More importantly, the resonance features of the five filtering dips show a significant dependence on the designed parameters, especially the gap between two nested split rings. The multiple-band filtering resonance device given here can open up new avenues to control terahertz waves in many technology-related fields.

Quantitative inheritance studies in sugar-cane. I. Estimation of variance components

1971 ◽  
Vol 22 (1) ◽  
pp. 93 ◽  
Author(s):  
DM Hogarth
Keyword(s):  
Factorial Design ◽  
Variance Components ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
The Other ◽  
Quantitative Inheritance ◽  
Genetic Determination ◽  
Nested Design ◽  
Dominance Genetic Variance ◽  
Estimation Of Variance

Two experiments in quantitative genetics were conducted, one based on a nested design in lattice squares and the other on a factorial design in a balanced lattice. Lattice designs were found to be suitable for genetic experiments if a large number of crosses was involved, but posed some problems in partitioning the sum of squares for treatments. The factorial design was considered preferable to the nested design, although neither design permitted estimation of epistatic variances which, therefore, were assumed to be negligible. Additive genetic variance was found to be more important than dominance genetic variance for most characters. However, most estimates of genetic variance lacked precision in spite of the use of large, precise experiments, which illustrated the difficulty in obtaining estimates of variance components with adequate precision. The validity of assumptions made for these analyses is discussed. The effect of competition was studied and estimates of heritability and degree of genetic determination were determined.

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