700 research outputs found

    Global properties of spacelike curves in Minkowski 3-space

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    We study global properties of closed spacelike curves in Minkowski 3-space

    Seedling Growth Of Dryobalanops Sp Inoculated With Mychorriza At Wanagama I

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    ABSTRAK Usaha konservasi dan seleksi jenis khususnya terhadap jenis yang tahan terhadap kekeringan dan mempunyai nilai ekonomi yang tinggi sangat diperlukan. Penelitian terakhir menunjukkan bahwa beberapa jenis tahan terhadap kekeringan dan inokulasi mikorisa mampu meningkatkan ketahanan jenis terhadap kekeringan.Diyobalanops sp. adalah jenis Dipterocarpaceae yang dalam keadaan kritis dan perlu usaha-usaha konservasi karena sema kin la ngkanya jenis tersebut. Penelitian ini dilaksanakan di Wanagama I Gunung Kid ul, Yogyakarta. Anakan Diyobalanops sp. dikumpulkan dari Bukit Suharto, Kalimantan Timur. Hasil penelitian menunjukkan bahwa: inokulasi mikorisa dan peneduhan dapat meningkatkan pembentukan mikorisa dan pada akhirnya mempertinggi daya tahan anakan terhadap kekeringan. Inokulasi meningkatkan pertumbuhan tinggi dan diameter. Dan pemakaian peneduh menghasilkan pertumbuhan tinggi yang baik

    Set-Theoretic Mereology

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    We consider a set-theoretic version of mereology based on the inclusion relation ⊆ and analyze how well it might serve as a foundation of mathematics. After establishing the non-definability of ∈ from ⊆, we identify the natural axioms for ⊆-based mereology, which constitute a finitely axiomatizable, complete, decidable theory. Ultimately, for these reasons, we conclude that this form of set-theoretic mereology cannot by itself serve as a foundation of mathematics. Meanwhile, augmented forms of set-theoretic mereology, such as that obtained by adding the singleton operator, are foundationally robust

    Upper Atmosphere Physics Data Obtained at Syowa Station in 2003

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    Upper Atmosphere Physics Data Obtained at Syowa Station in 2002

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