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Louis Vuitton city bags : a natural history
\"This volume is an unprecedented history of Louis Vuitton's women's bags, the most coveted line of accessories in women's fashion. At the heart of Louis Vuitton are its City Bags, a range of women's bags that dates back to the turn of the twentieth century. Featuring the trademark monograms of the house, the City Bag story began with the Steamer, a resort bag designed in 1901 to be packed inside a much larger steamer trunk. These bags have in a hundred years formally diversified into a dizzying array of handbags for every conceivable function demanded by the modern woman. Profoundly influential, City Bags are now known to millions by their descriptive names (Keepall, Bucket, Papillon, Alma, Locket, Noe, Speedy) and are still evolving into more fantastical forms. Lavishly illustrated with new and archival photography, historical graphics, landmark editorials, and ad campaigns, the volume traces the history of these specific bag families, and examines the earliest specimens and today's most sought-after collectibles, including Vuitton's collaborations with Takashi Murakami, Stephen Sprouse, Richard Prince, Yayoi Kusama, and Rei Kawakubo and one-off projects by Zaha Hadid, Shigeru Ban, Vivienne Westwood, Helmut Lang, Andrâee Putman, and of course, Marc Jacobs.\"--Amazon.com.
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Manufacturing of suitcase electropneumatic trainer kit
This research is a type of development. The manufacturing process of electropneumatic trainer kit starts from reading the image design, identification of tools and materials, preparation of materials is a series of measurement and cutting process, frame assembly which is then carried out fundamental testing and the assembly of electro pneumatic components on framework that has been made and tested the system electro pneumatic and finish with finishing as the final process. The results showed that the electroppneumatic trainer kit made weighed 15 kg with dimensions 500 mm x 800 mm x 100 mm. electric current used is 220 AC current volts, barometric pressure 6-9 bar. Constraints encountered during the tool manufacturing process Electropneumatic trainer kit tend to be lacking in skills as well as lacking the precision of the components used.
Journal Article
Using frustrated internal reflection as an analog to quantum tunneling
Also in teaching quantum physics one would like to bring experiments to the secondary school classroom, if not for “proofing” theories, then at least for illustrating and visualizing concepts. When EM waves are totally internally reflected from the inside of a prism, so called evanescent waves can tunnel through a narrow slit to another prism [1] and the intensity shows the exponential dependence on the width of the slit typical for tunneling. This is an example for quantum tunneling as quantum particles can tunnel as well due to their wave properties. This paper describes our progress from an ineffective microwave tunneling demonstration which we tried out with 5 teachers and 112 students, to a well-known optical demonstration but newly mounted in a small for loan suitcase with an educational script based on our try-outs and the PhET tunneling applet to link quantum concepts to tunneling phenomena.
Journal Article
Retention of a Double Slit Single Photon Interference Demonstration of Particle-Wave Duality
In the past there has been great faith in the power of laboratory activities and teacher demonstrations to enhance the learning of physics concepts. However, reviews of the effectiveness turned out to be disappointing [1-3] and have shown that lab activities and demonstrations need to be carefully designed and embedded in lessons to realize cognitive benefits [4]. Nevertheless, for secondary school quantum physics we developed a portable double slit demonstration mounted in a suitcase in which photons pass the slits approximately one by one and yet together produce an interference pattern. Based on experiences in 5 schools, we carefully designed the educational aspects of the demonstration and investigated its longterm learning effects through a written test of 68 students after 4 weeks and retention interviews after 4 months (10 interviews) and after 9 months (5 interviews). Students did remember the setup and results of the demonstration quite well. They were quite aware of the unexpected and strange wave-particle behavior of quantum particles in the demonstration including the effect of measurement or observation on the outcomes. However, half of them still had trouble defining duality in their own words and most of them did not remember de Broglie particle waves and how that related to the double slit experiment.
Journal Article
Design analysis of suitcase stabilizer and zipper protector
In recent years we have seen a major shift and trend to the use of four-wheeled suitcase with the reason of easiness to manage and perhaps a better balance. Unlike four-wheeled suitcase with single storage platform with the edge opening models which provide rolling stability and comfort handling, four-wheeled suitcase with splitting storage platforms with the middle opening models is often given rolling instability and less comfort handling because the underside sometimes is uneven position and affects the movement of the wheels. Pushing beside and pulling behind a suitcase with rolling wheels instability over a long period of time can induce musculoskeletal disorders. Through the analysis of existing suitcase designs, the questionnaire was used to collect customer voice data from a random sample of 126 respondents. After that, a research was conducted to design products and simulate tensile strengths for several types of materials. Here, silicone is the best option for material of the product.
Journal Article
Suitcase Lab: new, portable, and deployable equipment for rapid detection of specific harmful algae in Chilean coastal waters
Phytoplankton blooms, including harmful algal blooms (HABs), have serious impacts on ecosystems, public health, and productivity activities. Rapid detection and monitoring of marine microalgae are important in predicting and managing HABs. We developed a toolkit, the Suitcase Lab, to detect harmful algae species in the field. We demonstrated the Suitcase Lab’s capabilities for sampling, filtration, DNA extraction, and loop-mediated isothermal amplification (LAMP) detection in cultured
Alexandrium catenella
cells as well as Chilean coastal waters from four sites: Repollal, Isla García, Puerto Montt, and Metri. A LAMP assay using the Suitcase Lab in the field confirmed microscopic observations of
A. catenella
in samples from Repollal and Isla García. The Suitcase Lab allowed the rapid detection of
A. catenella
, within 2 h from the time of sampling, even at a single cell per milliliter concentrations, demonstrating its usefulness for quick and qualitative on-site diagnosis of target toxic algae species. This method is applicable not only to detecting harmful algae but also to other field studies that seek a rapid molecular diagnostic test.
Journal Article
Sorbent Film-Coated Passive Samplers for Explosives Vapour Detection Part B: Deployment in Semi-Operational Environments and Alternative Applications
The application of new sorbent-film coated passive samplers for capture of bulk commercial and military explosives vapours in operationally relevant spaces such as luggage, rooms, vehicles and shipping containers is presented. Samplers were easily integrated with in-service detection technologies with little/no sample preparation required. Ethylene glycol dinitrate (EGDN) was detected within 4 h in a container holding a suitcase packed with 0.2 kg Perunit 28E. Within a 22,000 dm
3
room, 1 kg of concealed Seguridad was detected within 24 h and in an adjoining room within 7 days. Exposed samplers also successfully captured components of 1 kg TNT after 72 h and 1 kg concealed Perunit 28E after 6 h in both a furnished room and a large, partially filled shipping container. For the latter, samplers captured detectable residues outside the container after 24 h and were stable during wet weather for 72 h. A one-week trial at three operationally relevant venues including a university, a theatre and a government building revealed a nuisance positive rate of <1.4% (n = 72). Finally, two alternative applications are presented for extraction of liquid samples and use a particulate contact swab showing flexibility for a range of different search activities.
Journal Article
A numerical technique for variable-order fractional functional nonlinear dynamic systems
This paper provides an efficient technique to discretize the variable-order fractional functional nonlinear differential equations. The proposed technique is based on a piecewise integro quadratic spline interpolation and finite difference approximation. To reveal the performance and accuracy of the proposed method, the behavioral responses of the suitcase with two wheels and pantograph models with variable-order fractional order are analyzed.
Journal Article
A Wearable Wireless Energy Link for Thin-Film Batteries Charging
A wireless charger for low capacity thin-film batteries is presented. The proposed device consists of a nonradiative wireless resonant energy link and a power management unit. Experimental data referring to a prototype operating in the ISM band centered at 434 MHz are presented and discussed. In more detail, in order to facilitate the integration into wearable accessories (such as handbags or suitcases), the prototype of the wireless energy link was implemented by exploiting a magnetic coupling between two planar resonators fabricated by using a conductive fabric on a layer of leather. From experimental data, it is demonstrated that, at 434 MHz, the RF-to-RF power transfer efficiency of the link is approximately 69.3%. As for the performance of the system as a whole, when an RF power of 7.5 dBm is provided at the input port, a total efficiency of about 29.7% is obtained. Finally, experiments performed for calculating the charging time for a low capacity thin-film battery demonstrated that, for RF input power higher than 6 dBm, the time necessary for recharging the battery is lower than 50 minutes.
Journal Article
A portable pencil-like immunosensor for point-of-care testing of inflammatory biomarkers
Portable devices for immunoassays are in high demand for point-of-care testing (POCT) of biomarkers. Here, we report a robust portable pencil-like immunosensor (PPS) platform for the determination of three inflammatory biomarkers including interleukin-6 (IL-6), procalcitonin (PCT), and C-reactive protein (CRP) in human serum samples. The PPS platform is composed of a unique pencil-like optical-fiber-based sensor, a reagent strip consisting of a series of pencil-cap-like wells, and a battery-powered photon counting detector for recording chemiluminescence. The PPS probe moves from well to well with a plug-into/out approach and goes through the immunoassay steps. Each fiber probe in the PPS platform can be sequentially used in up to 10 assays by simply propelling the intact probe out of the pencil body. The PPS platform is well-integrated into a portable suitcase-like device (32 cm × 23 cm × 11 cm) and is only 3 kg in weight. The sensor has good repeatability and can maintain 90% response after 14 days of storage at room temperature, showing its ability for assays in the field. The good linear relationship and efficient dynamic range with a limit-of-detection (LOD) of 1.05 pg/mL for IL-6, 10.64 pg/mL for PCT, and 29.40 ng/mL for CRP are obtained. The assay results are compared with clinical methods, and the findings confirm the high accuracy and precision of the proposed method. The proposed PPS platform is versatile and operable with minimal instruments and technical skills and simplifies the process of immune analysis, thus has great prospects for POCT of biomarkers.
Journal Article