41 research outputs found
Analysis of Base-Heating Environment During Ground Testing of a Lunar Lander Demonstrator
A three-dimensional, unstructured-grid, pressure-based, reacting flow, computational fluid dynamics (CFD) and heat transfer methodology was employed to study the base-heating environment of a lunar lander demonstrator, during terrestrial ground testing. Two base-heating environments were investigated: lunar lander demonstrator sitting on pad, and lunar lander demonstrator hovering at a distance above ground. Two unique and quite different base-flow physics are found for these two cases. In the case of demonstrator sitting on pad, the computed heat fluxes are high and the base flow is unsteady, caused by a Coanda effect precursor that makes the fountain jet oscillate about the center of the base. For the second case, due to the higher elevation of the demonstrator and the layout of the nozzles, the Coanda effect forces the fountain jet to be attached to two of the nozzle plumes, resulting in much lower computed base heat fluxes
PENGARUH MEDIA PEMBELAJARAN MIND MAPPING TERHADAP MINAT BELAJAR PESERTA DIDIK PADA PELAJARAN EKONOMI KELAS XI IPS 1 di SMA NEGERI 27 BANDUNG
Judul penelitian ini adalah pengaruh media pembelajaran mind
mapping terhadap minat belajar peserta didik pada pelajaran ekonomi kelas
XI IPS 1 di SMA Negeri 27 Bandung tahun ajaran 2016-2017. Berdasarkan
tinjauan langsung di SMA Negeri 27 Bandung kelas XI IPS 1, Pembelajaran
konvensional (ceramah) hanya membuat peserta didik kurang aktif dan malas
dalam menerima materi yang ada, karena pembelajaran hanya terpusat pada apa
yang disampaikan sehingga tidak dapat dimengerti secara maksimal. Tujuan dari
penelitian ini adalah: (1) Mengetahui penggunaan media mind mapping pada mata
pelajaran ekonomi kelas XI IPS 1 di SMA Negeri 27 Bandung. (2) Mengetahui
minat belajar peserta didik pada mata pelajaran ekonomi kelas XI IPS 1 di SMA
Negeri 27 Bandung. (3) Mengetahui seberapa besar pengaruh media mind
mapping terhadap minat belajar peserta didik pada mata pelajaran ekonomi kelas
XI IPS 1 di SMA Negeri 27 Bandung. Metode yang digunakan dalam penelitian
ini adalah survei. Teknik pengumpulan data yang digunakan yaitu observasi dan
angket dengan teknik pengolahan data uji validitas, uji reliabilitas, uji normalitas
data, analisis regresi linier sederhana dan koefisien determinasi, Hipotesis
penelitian berbunyi “Terdapat pengaruh antara media pembelajaran mind mapping
(X) terhadap minat belajar peserta didik (Y) pada mata pelajaran ekonomi. Hasil
penelitian ini adalah terdapat pengaruh antara variabel X dan Variabel Y sebesar
0,336 atau 33,60%. Untuk mengetahui hubungan fungsional antara variabel X dan
variabel Y maka digunakan analisis regresi linier sederhana dengan hasil
perhitungan sebagai berikut : Y = 9.915 + 0.537 X artinya bahwa setiap media
pembelajaran mind mapping bertambah 9,915 maka minat belajar meningkat
sebesar 0,537. Untuk mengetahui seberapa besar pengaruh variabel X (media
pembelajaran mind mapping) terhadap variabel Y (minat belajar), maka
digunakan koefisien determinasi dengan hasil perhitungan sebesar 33,60% maka
sebagian lainnya ditentukan oleh faktor lain yang tidak diteliti. Kesimpulan
hipotesis penelitian dapat diterima, sebagai akhir penelitian penulis
menyampaikan saran kepada guru agar sebaiknya guru menggunakan variasi
media pembelajaran yang menarik berkaitan dengan materi pelajaran yang akan
disampaikan, karena cara ini dapat membuat peserta didik aktif dan kreatif untuk
belajar. Kepada para praktisi atau peneliti lain di bidang pendidikan dapat
melakukan penelitian serupa dengan media pembelajaran dan metode yang
berbeda agar diperoleh berbagai alternatif untuk peningkatan pemahaman
pembelajaran pada pokok bahasan selanjutnya dan kepada pihak sekolah sebagai
bahan kajian bagi sekolah dan menyarankan guru untuk menggunakan media
pembelajaran yang mampu meningkatkan prestasi belajar peserta didik untuk
mendukung pendekatan saintifik dan media pembelajaran yang baik.
Kata Kunci : media pembelajaran mind mapping, minat Belajar
Antecedents and consequences of effectuation and causation in the international new venture creation process
The selection of the entry mode in an international market is of key importance for the venture. A process-based perspective on entry mode selection can add to the International Business and International Entrepreneurship literature. Framing the international market entry as an entrepreneurial process, this paper analyzes the antecedents and consequences of causation and effectuation in the entry mode selection. For the analysis, regression-based techniques were used on a sample of 65 gazelles. The results indicate that experienced entrepreneurs tend to apply effectuation rather than causation, while uncertainty does not have a systematic influence. Entrepreneurs using causation-based international new venture creation processes tend to engage in export-type entry modes, while effectuation-based international new venture creation processes do not predetermine the entry mod
Sensing the fuels: glucose and lipid signaling in the CNS controlling energy homeostasis
The central nervous system (CNS) is capable of gathering information on the body’s nutritional state and it implements appropriate behavioral and metabolic responses to changes in fuel availability. This feedback signaling of peripheral tissues ensures the maintenance of energy homeostasis. The hypothalamus is a primary site of convergence and integration for these nutrient-related feedback signals, which include central and peripheral neuronal inputs as well as hormonal signals. Increasing evidence indicates that glucose and lipids are detected by specialized fuel-sensing neurons that are integrated in these hypothalamic neuronal circuits. The purpose of this review is to outline the current understanding of fuel-sensing mechanisms in the hypothalamus, to integrate the recent findings in this field, and to address the potential role of dysregulation in these pathways in the development of obesity and type 2 diabetes mellitus
Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU
Contains fulltext :
172380.pdf (publisher's version ) (Open Access
WEMAC: Women and Emotion Multi-modal Affective Computing dataset
Among the seventeen Sustainable Development Goals (SDGs) proposed within the
2030 Agenda and adopted by all the United Nations member states, the Fifth SDG
is a call for action to turn Gender Equality into a fundamental human right and
an essential foundation for a better world. It includes the eradication of all
types of violence against women. Within this context, the UC3M4Safety research
team aims to develop Bindi. This is a cyber-physical system which includes
embedded Artificial Intelligence algorithms, for user real-time monitoring
towards the detection of affective states, with the ultimate goal of achieving
the early detection of risk situations for women. On this basis, we make use of
wearable affective computing including smart sensors, data encryption for
secure and accurate collection of presumed crime evidence, as well as the
remote connection to protecting agents. Towards the development of such system,
the recordings of different laboratory and into-the-wild datasets are in
process. These are contained within the UC3M4Safety Database. Thus, this paper
presents and details the first release of WEMAC, a novel multi-modal dataset,
which comprises a laboratory-based experiment for 47 women volunteers that were
exposed to validated audio-visual stimuli to induce real emotions by using a
virtual reality headset while physiological, speech signals and self-reports
were acquired and collected. We believe this dataset will serve and assist
research on multi-modal affective computing using physiological and speech
information