Results 31 to 40 of about 2,803 (179)

Akkeçi Oğlaklarında Kesim Öncesi ve Kesim Sonrası Ölçülen Bazı Özellikler Arasındaki İlişki Yapısının Kanonik Korelasyon Analizi ile İrdelenmesi

open access: yesJournal of Agricultural Sciences, 2005
Kanonik korelasyon analizi, her birinde iki yada daha fazla değişken bulunan, iki değişken seti arasındaki ilişki yapısının irdelenmesinde kullanılan çok değişkenli analiz tekniğidir.
Sıddık Keskin   +2 more
doaj   +1 more source

Karar Destek Makineleri ve Rastgele Orman Ağaçları Yöntemleri ile Vücut Yağ Yüzdesinin Tahmini

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2021
Obezite, önemli bir sağlık problemidir ve yaygınlığı giderek artmaktadır. Bu hastalığın, diğer birçok hastalığın tetikleyicisi ve habercisi olduğu bilinmektedir.
Burhan Baraklı, Ahmet Küçüker
doaj   +1 more source

Cobalt Single‐Atom Sites Engineered in Poly(Heptazine Imide) Photocathodes as Benchmark for Alkaline Hydrogen Evolution: A Comparative Transition Metal Study

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Cobalt single‐atoms in poly(heptazine imide) photocathodes maximize active‐site availability and outperform Fe, Cu, and Na in alkaline hydrogen evolution. Atomic precision (not bulk loading) proves predominance, establishing a design principle for the next generation of solar fuel devices.
Izadora F. Reis   +11 more
wiley   +1 more source

Wheat Sowing Practices in No‐Tillage Systems Modify the Microrelief and Hydrosedimentological Attributes: RPAS‐Based Photogrammetry

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT The microtopographic characteristics of terrain are modified by soil management and conservation practices, affecting water infiltration, storage, runoff generation, and sediment transport. However, assessing soil microtopography at representative spatial scales remains challenging and time‐consuming.
Jhonatan Spliethoff   +5 more
wiley   +1 more source

Borsa Endeksi Hareketlerinin Tahmini: Trend Belirleyici Veri

open access: yesSelçuk Üniversitesi Sosyal Bilimler Meslek Yüksekokulu Dergisi, 2019
Bu çalışma BIST 100 borsa endeksinin negatif ve pozitif yönlü hareketlerinin tahmin edilmesini konu edinmektedir. Yapay sinir ağı, destek vektör makinesi ve naive Bayes algoritmasının tahmin performansları karşılaştırılmaktadır.
Hakan Pabuçcu
doaj   +1 more source

Seti Observations Worldwide [PDF]

open access: yesSymposium - International Astronomical Union, 1985
This paper reviews all recent SETI observing programs that the author is aware of from the literature and private communication. The technical parameters of all known SETI efforts are summarized in an appendix containing references whenever possible.
openaire   +1 more source

The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?

open access: yesGlobal Policy, EarlyView.
ABSTRACT This article examines how institutional time horizons shape the long‐term survival prospects of human technological civilisation. While research on global catastrophic and existential risks has expanded, the temporal structures of political‐economic institutions remain underexamined.
Heikki Patomäki
wiley   +1 more source

SETI is Coming of Age [PDF]

open access: yesSymposium - International Astronomical Union, 1985
If asked to assess the evolution of SETI in the quarter of a century which has elapsed since its proposal, I would say that it parallels that of most novel and challenging human endeavours; a mixture of technical and cultural progresses and set-backs.
openaire   +1 more source

Bolide Light Curve Systematics from 75 Recovered Meteorites

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract How does the energy deposition profile (light curve), deceleration, and penetration depth in Earth's atmosphere depend on asteroid composition and meteorite type? Here, we present the light curve and velocity profile of 75 bolides from camera‐documented meteorite falls.
Peter Jenniskens   +3 more
wiley   +1 more source

Kardashev’s classification at 50+: A fine vehicle with room for improvement [PDF]

open access: yesSerbian Astronomical Journal, 2015
We review the history and status of the famous classification of extraterrestrial civilizations given by the great Russian astrophysicist Nikolai Semenovich Kardashev, roughly half a century after it has been proposed.
Ćirković M.M.
doaj   +1 more source

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