Judul: Perencanaan Kawasan Terbangun Lahan Kering di Kawasan Perdesaan
Abstrak: Salah satu faktor yang berpengaruh dalam produksi pertanian adalah lahan. Lahan yang dikelola akan mampu memberikan produksi yang berbeda-beda sesuai dengan tingkat produktivitasnya. Berdasarkan data dari Badan Pusat Statistik (BPS) tahun 2019, luas lahan kering nasional mencapai 63,4 juta hektar (33,7% luas lahan Indonesia). Hal ini menunjukkan bahwa potensi lahan kering sangat besar untuk dikembangkan. Penelitian ini dilakukan untuk merencanakan kawasan terbangun lahan kering di Kawasan Perdesaan yang ada di Kecamatan Warungkiara. Perencanaan kawasan agropolitan dianalisis menggunakan metode digitasi rupa bumi dan analisis dari data-data yang sudah dikumpulkan. Hasil penelitian menunjukkan bahwa terdapat beberapa penggunaan lahan di Kecamatan Warungkiara, yaitu pertanian daerah utara (1.308,49 ha), pertanian daerah tengah (2.795,41 ha), pertanian daerah selatan (2.424,01 ha), dan pemukiman (638,71 ha). Prasarana dan prasarana lahan kering pada kondisi eksisting masih kurang baik, sehingga diperlukan perencanaan prasarana kawasan terbangun., One of the influential factors in agricultural production is land. Land that is managed will be able to provide different production according to the level of productivity. Based on data from the Central Statistics Agency (BPS) in 2019, the national dryland area reached 63.4 million hectares (33.7% of Indonesia's land area). This shows that the potential of drylands is huge to be developed. This research was conducted to plan dryland built-up areas in the existing Rural Areas in Warungkiara District. The planning of agropolitan areas was analyzed using the method of earth shape digitation and analysis of the data that had been collected. The results showed that there are several land uses in Warungkiara Sub-district, namely northern agriculture (1,308.49 ha), central agriculture (2,795.41 ha), southern agriculture (2,424.01 ha), and settlements (638.71 ha). Dryland infrastructure and infrastructure in the existing condition is still not good, so it is necessary to plan the infrastructure of the built-up area.
Keyword: Agropolitan area, plantation, facilities and infrastructure, Warungkiara

Judul: Kajian Petak Sawah Dan Prasarana Pertanian Untuk Perencanaan Konsolidasi Kawasan Persawahan Terbangun
Abstrak: The majority of paddy fields in Indonesia have irregular and non-uniform plot shapes and sizes resulting in a decrease in the economic value of rice. Land consolidation activities can increase land productivity and the economic value of rice. This research was conducted to plan the consolidation of paddy fields and analyze existing agricultural infrastructure in the village of Bojongpicung District, Cianjur Regency. The analysis was carried out by digitizing rice field plots and testing the uniformity of plot sizes and analyzing the existing agricultural infrastructure. The results showed that the number of plots was 11,972 plots with an average plot size of 0.035 ha. The shape of the tiles varies and 60% is square. The overall plot uniformity index was 2.23%. From a planning perspective, the potential for consolidation is at a fairly successful level. Agricultural infrastructure in the existing condition of farm roads and irrigation canals is still not good, so rehabilitation is required according to existing standards.
Keyword: agricultural infrastructure, built-up area, land consolidation, rice field  plots, uniformity index

Judul: Analisis Bifurkasi Fluxon pada Persambungan Josephson Bertipe Superkonduktor-Feromagnetik-Superkonduktor (S/F/S)
Abstrak: Dynamics for the Josephson junction of type S/F/S is different from ordinary Josephon junction, where on the junction is contained the addition of tribal sin 2φ which is the result of the second harmonic supercurrent on the Josephson junction of type S/F/S that is related to Shapiro Steps symptoms. Research has been done is analyze the fluxon bifurcation to determine the stability of the fluxon in a Josephson junction of type S/F/S. The analysis was done by using the approach of analytically dynamics system and assisted by numerical solution that uses the application ODE 45 on MATLAB. The result of the critical point and the bifurcation types which is obtained to show the normalized damping (β and ϳₑ) does not affect the change of fluxon stability at the limit of less than one. Parameter β only affects the type of critical point and bifurcation that occurs, if β = 0, for ϳₑ = 0 and ϳₑ = 0.4 the bifurcation occurs is a saddle-center, and if β = 0.5 the bifurcation is a saddle-focus. Parameter ϳₑ affects the amplitude on the generated fluxon oscillation, if ϳₑ = 0 the fluxon amplitude is very small, whereas if ϳₑ = 0.4 the amplitude is larger. In each case, the fluxon stability is affected by the first harmonic supercurrents which is different sign, those are when ϳ₁ < 0 the fluxon is always stable, whereas when ϳ₁ < 0 fluxon is unstable at first but it tends towards to the point of its stability.
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