Apollo 15 mission report. Supplement 3: Ascent propulsion system final flight evaluation

Results from the postflight analysis of the ascent propulsion system (APS) performance during the Apollo 15 mission are presented. The duty cycle for the LM-10 APS consisted of two firings, and ascent stage liftoff from the lunar surface and the terminal phase ignition (TPI) burn. An evaluation was made of APS performance for the first firing and found to be satisfactory. No propulsion data was received from the second APS burn; however, all indications were that the burn was nominal. All performance parameters were well within their LM-10 3-sigma limits. Calculated throat erosion at engine cutoff for the LM-10 APS was approximately 3 percent greater than predicted

The Perfect Perspective: A Mathematical Analysis of Perspective Using Tools Available to Middle School Students

This paper examines the basic properties of perspective drawings, the history of perspective drawings, and the basic mathematics of perspective. Using a side view and a top view of a three-dimensional projection, similar triangles can be used to find distances from the axes and vanishing point in a projection. By breaking the three-dimensional projection into two, two-dimensional planes, one can recreate projections based on actual figures, or create placements of figures in real space based on a projection. Using this method, one \u27can change a projection based on the changing position of the vanishing point. This simple approach to perspective makes it accessible to students of different ability levels, as well as creating a strong connection between art and mathematics

Fluid jet amplifier Patent

Fluid control jet amplifier

Foreword

Every year 9000 children are estimated to die in traffic accidents in China. Fast motorization of the country in combination with low usage of child restraint system’s (CRS’s), are the two contributing factors to this alarming number. The vision of this thesis is to increase the usage of CRS’s in China, by understanding why the users are using the CRS and why the non-users are not using. The behavioural methodology Switch was used to investigate what positive behaviours could be copied and implemented in a larger scale to increase the usage. Interviews were performed with 30 users and 30 non-users in tier 1, tier 2, and tier 3 cities on the east coast of China. The main findings from the interviews showed that the reasons for not using was that the parents found the CRS complicated to install and to use, that it took too much space, that they did not know the benefits with a CRS and found it unnecessary and that they could not convince their children to sit in the CRS. Surprisingly most non-users already owned a CRS, but stopped using it. The users were using because they had experienced the CRS from abroad or got knowledge from other sources such as media or friends. Some parents were using because of a practicality issues such as the trouble to hold a heavy 3-year old child during a long trip. The behaviours chosen to represent the users for further work were learning from others, selection support, how to install, how to persist, and how to pay the knowledge of the CRS forward. The behaviour of the users was copied and implemented in a strategy consisting of the five parts above. The strategy is an interactive webpage with a close linkage to social networks to encourage sharing, and with a supporting poster- and bumper sticker campaign for spreading. The final product of the thesis work is a campaign including a fully working prototype of the webpage, which will be handed over to Volvo Cars for verification internally to make sure that the concept supports the different parts in a suitable and correct way before a public implementation. Material for poster and bumper stickers is also a part of the final delivery

On the Mental State of Consciousness of Wrongdoing

Mistake about or ignorance of the law does not exculpate in criminal law, except in limited circumstances. Doctrine and theory cognate to this principle are, by now, well developed and understood. But might an actor\u27s awareness of the illegality or wrongfulness of her conduct inculpate — that is, constitute a form of mens rea that establishes or aggravates liability? Trends in recent adjudication in white collar crime suggest that the answer is yes. This article, part of a symposium issue on Adjudicating the Guilty Mind, takes the first pass at describing the mental state of “consciousness of wrongdoing,” assessing its fit with the conceptual architecture of substantive criminal law, and uncovering the many challenges of proof and adjudication that this concept poses. Three conclusions broadly emerge from this initial, and somewhat truncated, inquiry: first, inculpating an actor for adverting to the legal or normative significance of her conduct is an attractive means of dealing with difficult line-drawing problems presented by many white collar offenses; second, the method can be justified on both retributive and deterrent grounds; and third, the practice requires much more thought and precision at the operational level, lest problems inherent in the structure of criminal adjudication be exacerbated in cases in which liability depends on the idea that an actor “knew what she was doing was wrong

On the Mental State of Consciousness of Wrongdoing

Mistake about or ignorance of the law does not exculpate in criminal law, except in limited circumstances. Doctrine and theory cognate to this principle are, by now, well developed and understood. But might an actor\u27s awareness of the illegality or wrongfulness of her conduct inculpate — that is, constitute a form of mens rea that establishes or aggravates liability? Trends in recent adjudication in white collar crime suggest that the answer is yes. This article, part of a symposium issue on Adjudicating the Guilty Mind, takes the first pass at describing the mental state of “consciousness of wrongdoing,” assessing its fit with the conceptual architecture of substantive criminal law, and uncovering the many challenges of proof and adjudication that this concept poses. Three conclusions broadly emerge from this initial, and somewhat truncated, inquiry: first, inculpating an actor for adverting to the legal or normative significance of her conduct is an attractive means of dealing with difficult line-drawing problems presented by many white collar offenses; second, the method can be justified on both retributive and deterrent grounds; and third, the practice requires much more thought and precision at the operational level, lest problems inherent in the structure of criminal adjudication be exacerbated in cases in which liability depends on the idea that an actor “knew what she was doing was wrong

Doppler radar with multiphase modulation of transmitted and reflected signal

A microwave radar signal is generated and split by a circulator. A phase shifter introduces a series of phase shifts into a first part of the split signal which is then transmitted by antenna. A like number of phase shifts is introduced by the phase shifter into the return signal from the target. The circulator delivers the phase shifted return signal and the leakage signal from the circulator to a mixer which generates an IF signal output at the Doppler frequency. The IF signal is amplified, filtered, counted per unit of time, and the result displayed to provide indications of target sense and range rate. An oscillator controls rate of phase shift in the transmitted and received radar signals and provides a time base for the counter. The phase shift magnitude increases may be continuous and linear or discrete functions of time

Polaroid film helps locate objects in inaccessible areas quickly

Polaroid film is used with conventional portable X ray equipment to locate and shoot items or objects in difficult areas. Polaroid film development time is about 20 seconds