Imagine Yourself in This Calculus Classroom

2007 ◽  
Vol 100 (6) ◽  
pp. 394-401
Author(s):  
Luajean Bryan
Keyword(s):  
Data Collection ◽  
Balloon Flight ◽  
Hot Air ◽  
Calculus Students

The efforts to attract students to precalculus, trigonometry, and calculus classes became more successful when projects-based classes were offered. Data collection from an untethered hot air balloon flight for calculus students was planned to maximize enrollment. The data were analyzed numerically, graphically, and algebraically. The project made calculus more meaningful and memorable for students.

scholarly journals Liability for Dangerous Activities: A Comparative Analysis

1999 ◽  
Vol 48 (4) ◽  
pp. 731-756 ◽  
Author(s):  
Elspeth Reid
Keyword(s):  
New York ◽  
Comparative Analysis ◽  
Strict Liability ◽  
Balloon Flight ◽  
Hot Air ◽  
The World ◽  
Probable Consequence ◽  
Dangerous Activity

Hot air ballooning is a dangerous activity, and not only for the balloonist. In Guille v. Swan, 1 a balloonist crash-landed in a New York vegetable garden. When a crowd rushed to his assistance damage was caused to the vegetables. He was held to be strictly liable for the damage caused. Across the Atlantic balloonists were more glamorous although not more successful. In Scott's Trs. v. Moss, 2 the defender, an Edinburgh impresario, arranged a balloon flight by the “world-renowned scientific aeronaut”, Professor Baldwin. The advertisement promised that the Professor would descend by parachute, landing on ground rented by the defender. In the event, he missed and landed in a turnip field owned by the pursuers. Fences and a large number of turnips were trampled by the crowd rushing to the scene. The Court of Session decided that the defender could be liable only on the basis of fault. Foreseeability was of the essence: the pursuer was entitled to damages if and only if the crowd's actions were the “natural and probable consequence” of the defender's activities. Counsel's research had uncovered Guille v. Swan, but the Court of Session declined to follow it into strict liability.

Atmospheric properties measurements and data collection from a hot-air balloon

1995 ◽  
Author(s):  
Steven M. Watson ◽  
N. Olson ◽  
R. P. Dalley ◽  
W. J. Bone ◽  
Robert T. Kroutil ◽  
...  
Keyword(s):  
Data Collection ◽  
Hot Air

scholarly journals Multihour Stratospheric Flights with the Heliotrope Solar Hot-Air Balloon

2020 ◽  
Vol 37 (6) ◽  
pp. 1051-1066
Author(s):  
Daniel C. Bowman ◽  
Paul E. Norman ◽  
Michael T. Pauken ◽  
Sarah A. Albert ◽  
Darielle Dexheimer ◽  
...  
Keyword(s):  
Lower Stratosphere ◽  
Low Cost ◽  
The Arctic ◽  
Design History ◽  
Balloon Flight ◽  
Upper Troposphere ◽  
Hot Air ◽  
Construction Techniques ◽  
Solar Powered ◽  
Constant Altitude

AbstractStandard meteorological balloons can deliver small scientific payloads to the stratosphere for a few tens of minutes, but achieving multihour level flight in this region is more difficult. We have developed a solar-powered hot-air balloon named the heliotrope that can maintain a nearly constant altitude in the upper troposphere–lower stratosphere as long as the sun is above the horizon. It can accommodate scientific payloads ranging from hundreds of grams to several kilograms. The balloon can achieve float altitudes exceeding 24 km and fly for days in the Arctic summer, although sunset provides a convenient flight termination mechanism at lower latitudes. Two people can build an envelope in about 3.5 h, and the materials cost about $30. The low cost and simplicity of the heliotrope enables a class of missions that is generally out of reach of institutions lacking specialized balloon expertise. Here, we discuss the design history, construction techniques, trajectory characteristics, and flight prediction of the heliotrope balloon. We conclude with a discussion of the physics of solar hot-air balloon flight.

Application of SPC in the Quality Control of the Leaf Tobacco Threshing and Redrying Production

2011 ◽  
Vol 109 ◽  
pp. 56-59
Author(s):  
Peng Peng Huang ◽  
Hai Wen Liu
Keyword(s):  
Quality Control ◽  
Data Collection ◽  
Product Quality ◽  
Manufacturing Process ◽  
Production Flow ◽  
Online Data ◽  
Hot Air ◽  
Quality Stability ◽  
Online Data Collection ◽  
Critical Process

Considering the practical problems in the threshing and redrying production, in order to improve the manufacturing process quality, by using twice hot-air tobacco embellishing as the critical process in production flow and applying SPC technology, through the online data collection, this paper analyzed the causes of quality defects in the course of production and made adjustments. The conclusion is that SPC technology ensures the quality stability of the tobacco processing progress, and also strongly improves the process capability, which achieves the 3σ Control of product quality.

scholarly journals MATHEMATICAL MODEL OF HOT-AIR BALLOON STEADY-STATE VERTICAL FLIGHT PERFORMANCE

Aviation ◽  
2021 ◽  
Vol 25 (3) ◽  
pp. 149-158
Author(s):  
Nihad E. Daidzic
Keyword(s):  
Mathematical Model ◽  
Steady State ◽  
Flight Performance ◽  
Balloon Flight ◽  
Flight Tests ◽  
Flight Planning ◽  
Hot Air ◽  
Ideal Gases ◽  
External Flows ◽  
Steady State Performance

Vertical flight performance of Lighter-than-Air free hot-air balloons is derived and discussed. Novel mathematical model using lumped-parameters has been used to model balloon flight dynamics and steady-state performance in particular. Thermal model was not treated as the super-heat is under the control of aeronauts/pilots. Buoyancy or gross lift, net or effective lift, specific lift, and excess specific lift were derived for a general single envelope balloon and can be applied to hot-air, gas and hybrid balloons. Rate-of-climb, absolute ceiling, rate-of-descent, and the maximum rate-of-descent or the uncontrolled terminal descent have all been modeled and sample computations performed for AX8 or AX9 FAI-class hot-air balloons. Lifting index or the specific net/effective lift have been computed treating ambient and hot air as ideal gases at various pressure altitudes and representative envelope temperatures. Drag coefficient in upward and downward vertical flights have been chosen based on best available data. Experimental scale and full-scale flight tests are suggested for more accurate estimates of external aerodynamics in vertical balloon flights. CFD computations of coupled inner- and external-flows are also recommended in future efforts. Knowledge of free balloon’s vertical performance is essential in flight planning and operational safety of flight.

Thomas Baldwin and the Creation of the Hot Air Balloon as a Scientific and Aesthetic Site of Knowledge in the Late Eighteenth Century

2020 ◽  
Vol 169 (1) ◽  
pp. 1-16
Author(s):  
Fiona Amery
Keyword(s):  
Eighteenth Century ◽  
Emotional Response ◽  
Scientific Understanding ◽  
Balloon Flight ◽  
Hot Air ◽  
Late Eighteenth Century ◽  
The Earth ◽  
Aesthetic Pleasure ◽  
Late Eighteenth ◽  
New Perspective

‘But what scenes of grandeur and beauty! A tear of pure delight flashed in his eye! Of pure and exquisite delight and rapture; to look down on the unexpected change already wrought in the works of art and nature, contracted to a span by the new perspective, diminished almost beyond the bounds of credibility’.1 So wrote Thomas Baldwin in his account of his hot air balloon flight from Chester to Warrington in Lancashire on 8 September 1785. This telling description of his emotional response to the prospect of the earth from the balloon car epitomises Baldwin’s dual concern with aesthetic pleasure and scientific understanding. He felt elated viewing the land anew from his aerial position, amazed at the transformation it revealed and the experimental opportunities it presented.

scholarly journals Analisis Kecepatan Aliran Fluida terhadap Kinerja Kolektor Surya yang Bergerak Mengikuti Posisi Matahari

2019 ◽  
Vol 12 (1) ◽  
pp. 12-21
Author(s):  
Feby Nopriandy ◽  
Suhendra Suhendra
Keyword(s):  
Data Collection ◽  
Solar Radiation ◽  
Solar Collector ◽  
Flow Speed ◽  
Drying Method ◽  
Drying Process ◽  
Air Velocity ◽  
Hot Air ◽  
Fixed Condition

Abstrak. Metode pengeringan menggunakan surya sebagai sumber energi panas adalah metode pengeringan yang banyak digunakan. Besarnya panas yang dihasilkan tergantung dari jumlah radiasi matahari yang dapat ditangkap oleh kolektor surya. Tangkapan radiasi matahari dapat dioptimalkan dengan merekayasa kolektor surya yang dapat bergerak mengikuti posisi matahari. Kualitas produk pangan yang dikeringkan sangat dipengaruhi oleh aliran udara panas pada proses pengeringan. Berdasarkan permasalahan tersebut, perlu dilakukan kajian tentang aliran udara panas pada kolektor surya yang bergerak mengikuti posisi matahari. Penelitian menggunakan 2 buah kolektor surya yang direkayasa dengan ukuran, bentuk dan bahan yang sama dimana salah satu kolektor berada dalam kondisi tetap dan kolektor lainnya dapat bergerak mengikuti posisi matahari. Kecepatan aliran udara panas yang keluar dari saluran keluar (outlet) kolektor surya divariasikan menjadi 3 perlakuan yaitu 2 m/s, 4 m/s dan 6 m/s. Pengambilan data dimulai dari pukul 08.00 sampai pukul 16.00 dengan selang waktu pengambilan data adalah setiap 30 menit. Hasil analisis menunjukkan bahwa kecepatan udara panas pada outlet kolektor surya sangat berbeda nyata pengaruhnya terhadap nilai temperatur udara panas di dalam dan outlet kolektor surya. Kolektor surya yang bergerak mengikuti posisi matahari dapat meningkatkan performansi temperatur di dalam dan outlet kolektor surya pada berbagai kondisi kecepatan udara outlet berbanding kolektor surya tetap. Kenaikan performansi tertinggi di dalam dan outlet kolektor surya diperoleh pada kecepatan udara outlet 2 m/s masing-masing sebesar 16,29% dan 3,98%.  Analysis of Fluid Flow Speed on Solar Collector Performance which Moves to follow the Position of the Sun Abstract. The drying method using solar as a source of heat energy is a widely used drying method. The amount of heat produced depends on the amount of solar radiation that can be collected by solar collector. The capture of solar radiation can be optimized by construction the solar collector that can move in the sun's position. The quality of dried food products is strongly influenced by the flow of hot air in the drying process. Based on these problems, it is necessary to study the flow of hot air in solar collectors that move in the sun's position. The study used 2 units of solar collector that construction with the same size, shape and material where one of the collectors is in a fixed condition and the other collector can move in the sun's position. The velocity of hot air flowing out of the outlet of the solar collector was varied into 3 treatments, namely 2 m/s, 4 m/s and 6 m/s. Data collection starts at 8:00 a.m. until 16:00 p.m. with an interval of data collection is every 30 minutes. The results of the analysis show that the hot air velocity at the solar collector outlet has a very different effect on the temperature value of hot air inside and the solar collector outlet. Solar collector that move in the sun's position can increase the temperature performance in and solar collector outlets in various conditions of outlet air velocity. The highest increase in performance in and solar collector outlets was obtained at outlet air velocity of 2 m / s at 16.29% and 3.98% respectively.

scholarly journals Analisis Tata Ruang Perpustakaan Sekolah

Jurnal Ecogen ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 259
Author(s):  
Fitry Aryani ◽  
Armiati Armiati
Keyword(s):  
Data Collection ◽  
Physical Condition ◽  
School Environment ◽  
School Library ◽  
Secondary Data ◽  
Descriptive Study ◽  
Primary Data ◽  
Physical Conditions ◽  
Hot Air ◽  
Air Circulation

This study aims to determine the arrangement of the library space in SMA N 5 Solok Selatan and to know the physical and non-physical conditions of the library space in SMA N 5 Solok Selatan. This research is a descriptive study with qualitative methods which have 2 types of data, namely primary data and secondary data. This research instrument uses a list of interview questions and data collection techniques by conducting observations, interviews, and documentation to support the implementation of this research. Based on the research results, it shows that: the library of SMA N 5 Solok Selatan is in line with the function of the school library in general, where the location of the library can be said to be strategic because it is in the middle of a school environment. However, the area of the library building / space is currently categorized as narrow when compared to the large number of students. Then, for the arrangement of the library space is still classified as not paying attention to psychological, functional and aesthetic aspects. Another thing is also seen from the physical condition of the library which is still said to be inadequate, this can be seen from the less bright lighting and the dark and hot air circulation. Meanwhile, the non-physical condition is still incomplete, seen from the lack of furniture and equipment available in the library.

Electron Diffraction of Wet Biological Membranes

1974 ◽  
Vol 32 ◽  
pp. 158-159
Author(s):  
S.W. Hui ◽  
D.F. Parsons
Keyword(s):  
Electron Diffraction ◽  
Data Collection ◽  
Biological Membranes ◽  
Small Areas ◽  
Electron Diffraction Technique ◽  
Electron Microscopes ◽  
Collection Time ◽  
Camera Length

The development of the hydration stages for electron microscopes has opened up the application of electron diffraction in the study of biological membranes. Membrane specimen can now be observed without the artifacts introduced during drying, fixation and staining. The advantages of the electron diffraction technique, such as the abilities to observe small areas and thin specimens, to image and to screen impurities, to vary the camera length, and to reduce data collection time are fully utilized. Here we report our pioneering work in this area.

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