3,689 research outputs found
Research on electrochemical silvering process of brass elements
No full textIn the presented paper the authors attempted at analyzing the selected properties of silver coatings processed with electrochemical method on brass elements. The conducted research indicates that changes in cathode current density in the range 100 A ・ dm-2 to 333 A ・ dm-2 and the process time in the range of 60 s to 120 s have no effect on the basic properties of the obtained silver coatings (microhardness, corrosion resistance, adhesion), but it only seems to affect their appearance
21st-century brass pedagogy : modern scientific discoveries and their implications on current brass pedagogy
No full textThesis (DM) - Indiana University, Music, 2017Since the beginning of brass instruments, much of the information utilized to develop a pedagogical framework for teaching and playing these instruments was developed through personal experience, trial and error, and anecdotal teaching through a largely apprenticeship system. Pedagogical ideas were developed from the vantage point of current information viewed through the lens of conventional thought of the time. Several emerging fields of scientific research have contributed to new information that contradicts what was previously viewed as pedagogically stable ideology. This paper summarizes a history of conventional thought towards human learning and movement, provides a brief description of new and emerging fields of scientific inquiry that have been created/enhanced by technological advancements in measurement equipment, and offers several examples of new ways to apply current scientific beliefs towards conventional brass pedagogy in the form of exercises that c an replace traditional pedagogical exercises based on outdated information
BRASS ENSEMBLES WITHIN THE UNITED STATES MILITARY: HOW THE DEVELOPMENT OF BRASS CHAMBER MUSIC CONTRIBUTED TO MILITARY BANDS AND HOW IT RELATES TO WHAT IS EXPECTED OF THE PROFESSIONAL TUBIST
No full textThesis (DM) – Indiana University, Music, 2024When hearing the term “military band,” most would think of a full concert band featuring 50+ instrumentalists to include brass, woodwinds, percussion, and occasionally vocalists; however, within the past 60 years, many variations of brass ensembles have emerged from the full military concert band for various reasons. These brass ensembles include brass octets, quintets, quartets, trios, tuba quartets, and have drastically grown in popularity within the military for multiple reasons to include ease of use, practicality, financial reasons, and others. As a result, the tuba has become a necessity not only larger military band ensembles, but multiple brass chamber groups which in turn requires the tubist to become more versatile in order to successfully audition and win one of these band jobs. When compared to other academic research conducted on or how to win an orchestral audition, discussions on military bands are often overlooked. The United States Department of Defense is the single largest employer of musicians in the country, and it is important for students and young professionals to have access to relevant information. Having won my Regional Air Force Band job in 2019 while in college, and a Premier Air Force Band job in 2023, I have a personal connection to this subject matter and understand the details of these jobs. This final project aims to show the early developments of the brass chamber movement starting in the civilian world, and how it began to bleed over to the military bands for its many military- specific benefits, as well as show how various brass ensembles continue to be a necessity for military bands. Lastly, this paper will show how the recent popularity and necessity of military chamber music relates to what is expected of the modern professional tubist in order to successful win an audition within one of the bands
Blocking CCL9 Protects Newborn Mouse Pups from Hyperoxia-Induced Impaired Alveolar Development.
No full textEntanglement and quantity in quantum space - About quantum measurement (II)
No full textAs a continuation and extension of "quantity in phase space" "quantity in quantum space" is introduced. With that, the disappearing of quantum interference discussed in a previous paper [S. Durr, et al., Nature 395 (1998) 33] is explained in the same spirit as our recent papers [Ren De-Ming, Commun. Theor. Phys. (Beijing, China) 41 (2004) 685, 833].Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)1ARTICLE133-364
Sneutrino DM in the NMSSM with inverse seesaw mechanism
No full textIn supersymmetric theories like the Next-to-Minimal Supersymmetric Standard Model (NMSSM), the lightest neutralino with bino or singlino as its dominant component is customarily taken as dark matter (DM) candidate. Since light Higgsinos favored by naturalness can strength the couplings of the DM and thus enhance the DM-nucleon scattering rate, the tension between naturalness and DM direct detection results becomes more and more acute with the improved experimental sensitivity. In this work, we extend the NMSSM by inverse seesaw mechanism to generate neutrino mass, and show that in certain parameter space the lightest sneutrino may act as a viable DM candidate, i.e. it can annihilate by multi-channels to get correct relic density and meanwhile satisfy all experimental constraints. The most striking feature of the extension is that the DM-nucleon scattering rate can be naturally below its current experimental bounds regardless of the higgsino mass, and hence it alleviates the tension between naturalness and DM experiments. Other interesting features include that the Higgs phenomenology becomes much richer than that of the original NMSSM due to the relaxed constraints from DM physics and also due to the presence of extra neutrinos, and that the signatures of sparticles at colliders are quite different from those with neutralino as DM candidate.National Natural Science Foundation of China (NNSFC) [11575053]SCI(E)ARTICLE1
Classical mechanics and quantum mechanics
No full textThe Newton equation of motion is derived from quantum mechanics.Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)2ARTICLE5685-6884
The relationship between native language and brass playing
No full textThesis (DM) – Indiana University, Music, 2023Introduction:
With the increasing number of students studying abroad, brass educators are challenged with teaching students who speak different native languages. This research project aims to investigate the relationship between the native language and brass playing, focusing on horn players who are either native English speakers or native Mandarin speakers.
Method:
The research was based on a self-evaluated survey sent to horn players worldwide. The survey asked the participants to rate their perceived difficulty levels in executing various horn techniques, describe their general tone qualities and articulation styles, and experience with players from different native language backgrounds and horn educations outside their home country.
Results:
The research results showed that there were significant differences between the native English speakers and the native Mandarin speakers in terms of their general articulation styles and their perceived difficulty levels of some techniques. Specifically, native English speakers found the following techniques to be easier to perform: ‘consistent sound quality through a phrase’, ‘rhythmic precision and stable pulse’, ‘gentle front ends of notes (softer attacks)’, ‘light-connected articulations in articulated scale passages’, ‘clear separated staccato articulation in scale passages’, ‘clear separated staccato articulation in scale passages’, and ‘flutter tongue’. Also, majority of the native Mandarin speakers described that they have a softer and more mellow articulation styles versus to majority of the native English speakers described that they have a brighter and heavier articulation styles.
However, these differences were only found in the more experienced group of horn players who had studied/ played the horn for 20 years or more. No significant differences were found between the native English speakers and native Mandarin speakers in the less experienced group of horn players who have studied/ played the horn between 3 and 19 years.
Conclusion:
These findings indicate the need for developing teaching methods and exercises to help horn players overcome the barriers created by their native language and leverage the strength brought with their native language. They also suggest that brass educators should be aware of the linguistic backgrounds of their students and tailor their instruction correspondingly. Accordingly, four teaching methods are developed in this project to bridge the barriers and effectively enhance students’ learning outcomes and experience
Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts
No full textThe paper presents an improved process for recycling of silver-plate brass housing. Silver and copper are recovered with a purity of 99.99 % and 99.90 %, respectively, with the aim of obtaining materials of higher value using additional procedures based on the same process and equipment. The novel approach with subsequent electrorefining yields copper of 99.99 % purity with BS EN 1978:1998 (Cu-CATH-1) quality and is referred to as LME grade A. Additional processing of silver results in superfine, micro-sized Ag powder with partie size from 0.14 to 1.13 mu m and purity of 99.999 %. Copper electrorefining tests were performed using 1.50 dm(3) of synthetic electrolyte in a 2 dm(3) electrolytic cell. Effects of current density and electrolyte composition were investigated. Optimal current density for the first and second refining was 120 A/m(2) and 200 A/m(2), respectively. Additional refining of silver was performed by chemical reduction from an aqueous solution. Optimal results were obtained with ascorbic acid as a reduction agent in concentration of 0.1 mol/dm(3) and polyvinylpyrrolidon as a protective agent in concentration of 2 % by mass. The investigation results could be adopted into production
Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts
No full textThe paper presents an improved process for recycling of silver-plate brass housing. Silver and copper are recovered with a purity of 99.99 % and 99.90 %, respectively, with the aim of obtaining materials of higher value using additional procedures based on the same process and equipment. The novel approach with subsequent electrorefining yields copper of 99.99 % purity with BS EN 1978:1998 (Cu-CATH-1) quality and is referred to as LME grade A. Additional processing of silver results in superfine, micro-sized Ag powder with partie size from 0.14 to 1.13 mu m and purity of 99.999 %. Copper electrorefining tests were performed using 1.50 dm(3) of synthetic electrolyte in a 2 dm(3) electrolytic cell. Effects of current density and electrolyte composition were investigated. Optimal current density for the first and second refining was 120 A/m(2) and 200 A/m(2), respectively. Additional refining of silver was performed by chemical reduction from an aqueous solution. Optimal results were obtained with ascorbic acid as a reduction agent in concentration of 0.1 mol/dm(3) and polyvinylpyrrolidon as a protective agent in concentration of 2 % by mass. The investigation results could be adopted into production
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