5,874 research outputs found
Trifluoromethyl-substituted polymers
Get PDFThe synthesis of polymers is discussed. It includes: (1) the synthesis of fluorine-containing crosslinked poly(ether ketones); (2) the synthesis and characterization of poly(imide amides) and their N-methylated analogues; (3) the synthesis of fluorine-containing aromatic polyethers; (4) the synthesis of novel fluorine-containing aromatic polysiloxanes; and (5) the conversion of 6F-containing polythioethers to polysulfones. It is hoped that these polymers will find use as low dielectric materials in electronic applications, function as thermal control coatings, or be suitable elastomeric sealants for extreme service conditions
Low dielectric fluorinated poly(phenylene ether ketone) film and coating
Get PDFThe present invention relates to film and coating materials prepared from novel fluorinated poly(phenylene ether ketones). A fluorinated poly(phenylene ether ketone) is prepared by reacting a bisphenol with 1,1,1,3,3,3 hexafluoro-2,2-bis 4-(4-halobenzoyl) phenyl propane (wherein halo is fluoro or chloro), which is a novel monomer formed as the reaction product of halobenzene (wherein halo is fluoro or chloro) and 1,1,1,3,3,3 hexafluoro-2,2-bis (p-chloro formyl phenyl) propane. Especially beneficial results of this invention are that films and coating materials prepared from the novel fluorinated poly(phenylene ether ketone) are essentially optically transparent/colorless and have a lower dielectric constant than otherwise comparable, commercially available poly(phenylene ether ketones). Moreover, unlike the otherwise comparable commercially available materials, the novel fluorinated poly(phenylene ether ketones) of the present invention can be solution cast or sprayed to produce the films and coatings. Furthermore, the long term thermal stability of the polymers of the present invention is superior to that of the commercially available materials
Single-color two-photon spectroscopy of Rydberg states in electric fields
Get PDFRydberg states of atomic helium with principal quantum numbers ranging from
n=20 to n=100 have been prepared by non-resonance-enhanced single-color
two-photon excitation from the metastable 2 {^3}S{_1} state. Photoexcitation
was carried out using linearly and circularly polarized pulsed laser radiation.
In the case of excitation with circularly polarized radiation, Rydberg states
with azimuthal quantum number |m_{\ell}|=2 were prepared in zero electric
field, and in homogeneous electric fields oriented parallel to the propagation
axis of the laser radiation. In sufficiently strong electric fields, individual
Rydberg-Stark states were resolved spectroscopically, highlighting the
suitability of non-resonance-enhanced multiphoton excitation schemes for the
preparation of long-lived high-|m_{\ell}| hydrogenic Rydberg states for
deceleration and trapping experiments. Applications of similar schemes for
Doppler-free excitation of positronium atoms to Rydberg states are also
discussed
Passive Spectacles and Resilient Heroines: Examining the Female Gaze in Cinematic Adaptations of The Scarlet Letter, The Last of the Mohicans, and Little Women
Get PDFIn her 1975 article, Visual Pleasure and Narrative Cinema, Laura Mulvey writes, Unchallenged, mainstream film coded the erotic into the language of the dominant patriarchal order (60). She argues that in film, this patriarchal language produces images of women who are displayed for the erotic enjoyment of male spectators, playing out male subconscious erotic fantasies on screen. Using Mulvey\u27s articles as a theoretical framework, I look for evidence of the active female gaze in the cinematic adaptations of 1he Scarlet Letter written by Nathaniel Hawthorne in 1850, The Last of the Mohicans written by James Fenimore Cooper in 1826 and Little Women written by Louisa May Alcott in 1868. For each chapter of my thesis, I examine a pair of adaptations beginning with the 1934 and 1995 versions of the Scarlet Letter, followed by the 1936 and 1992 versions of The Last of the Mohicans, and concluding with the 1933 and 1994 versions of Little Women. Each of the earlier films from the 1930s is encoded in this patriarchal structure to some degree. Mulvey\u27s essay Visual Pleasure and Narrative Cinema was published in 1975. While her theories on patriarchal encryption can be seen in the films from the 1930s, advances in areas such as equal rights, political correctness, and affirmative action have influenced the filmmakers of the later 1990s films. Due to the changes in the political atmosphere, each of the three films from the 1990s demonstrate a greater awareness of the female audience and struggle to allow women to have a strong gaze
Living the Curse
Get PDFLiving the Curse, CCHS
By Cassidy Chergi
My service-learning project was an organization very near and dear to my heart I have worked with them most of my life. Imagine the simple act of going to sleep resulting in your death! This is my life, I have CCHS. This extremely rare genetic disorder effectively renders autonomic systems in the affected patience inoperable. The most notably sleep equals death!!!! Additional symptoms include reduced conception of pain, cardiac issues, learning disabilities and motility issues. Obviously, there is often additional collateral damage from repeated hypoxic events. People with CCHS will and are reliant on some sort of ventilation equipment for life.
We are a collectivist community. The organization works in multiple capacities including outreach, awareness, family support, self-funding research and family connections. As one could imagine, living with a diagnosis with less than 2000 cases ever reported worldwide can be isolating for the patient and the families. I have been fortunate to assist the organization in multiple capacities. I have worked on the family conference planning committee for quite some time. Despite insurmountable odds family members of this community have taken a stand for their loved ones. They volunteer there time, efforts and monies in the hope of better future outcomes for generations of CCHS patients for the future. Thru fundraising, education and awareness raising efforts they work tirelessly to support one another in this unexpected journey thru this rewarding journey into the unknown seeking answers for their loved ones.https://stars.library.ucf.edu/hip-2024fall/1072/thumbnail.jp
Alien Registration- Cassidy, Joseph E. (Brownville, Piscataquis County)
Get PDFhttps://digitalmaine.com/alien_docs/10028/thumbnail.jp
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