132 research outputs found
CCDC 2143240: Experimental Crystal Structure Determination
No full textRelated Article: Daisy R. S. Pooler, Daniel Doellerer, Stefano Crespi, Ben L. Feringa|2022|Org.Chem.Front.|9|2084|doi:10.1039/D2QO00129
CCDC 2143164: Experimental Crystal Structure Determination
No full textRelated Article: Daisy R. S. Pooler, Daniel Doellerer, Stefano Crespi, Ben L. Feringa|2022|Org.Chem.Front.|9|2084|doi:10.1039/D2QO00129
CCDC 2143239: Experimental Crystal Structure Determination
No full textRelated Article: Daisy R. S. Pooler, Daniel Doellerer, Stefano Crespi, Ben L. Feringa|2022|Org.Chem.Front.|9|2084|doi:10.1039/D2QO00129
HENRY JAMES’ VIEW ABOUT AMERICAN CULTURE AS REPRESENTED BY DAISY MILLER IN DAISY MILLER (GENETIC STRUCTURALISM APPROACH)
Full text linkABSTRACT
Daisy Miller is one of James’ novels that talks about cultural gap. There
are many cultural conflicts between American and European. The researcher had
formulated three problem statements as follows: (1) How are the cultural
differences in Daisy Miller? (2) How does the society in Daisy Miller view
Daisy Miller? (3) How does Henry James view American culture as
represented by Daisy Miller in Daisy Miller?
In order to answer the questions, the researcher used genetic structuralism
approach by Lucien Goldman to analyze Daisy Miller, because genetic
structuralism is used to find the world view of the author toward his novel. There
are three aspects to be correlated in genetic structuralism, i.e. the novel itself,
biography of the author, the social condition when the novel was created. The
researcher also had to find the previous novel and novel after Daisy Miller which
have the same theme and correlated them with Daisy Miller. By the combination
of the aspects above, the researcher could find Henry James’ view about
American culture as represented by Daisy Miller in Daisy Miller.
There were three findings in this research: First, the researcher found that
there are cultural differences between America and Europe. In Daisy Miller Henry
James presents the Americans who had settled in Europe lived in a luxurious life.
It can be seen from their life style. They stayed from one hotel to another and they
liked to hold parties. The Millers family brought a private tutor to teach Randolph,
Daisy’s brother. It was very expensive to bring a private tutor from America to
Europe; but James presents the society to show that it was a rich and high-class
society. Daisy Miller was a visitor in Europe. She brought the pure American
culture. The conflict appeared when she was considered to break the rules in
Europe such as walking in the night with a man.
Second, the researcher identified the view of society to Daisy Miller. The
characters in Daisy Miller were: (1) Frederick Winterbourne. He was a young
American who had lived and schooled in Geneva. He sometimes judged Daisy as
a good girl, but in other time he considered her as a bad girl. (2) Mrs. Costello.
She is American but with European air. She looked down the Millers family
because of their new money, unsophisticated conduct, and intimacy with their
courier. (3) Mrs. Walker. She exemplified the values of the formal American but
with European air similar to Mrs. Costello. (4) He was an Italian man. He
considered Daisy just as natural and innocent girl. (5) Mrs. Miller. She was
Daisy’s mother. She was the opposite of a higher class European mother, because
she allowed her daughter to do as she liked.
Third, the researcher found that Henry James presents Daisy Miller as the
representation of American culture. Daisy’s characteristics are: (1) Freedom. (2)
Naturalness. (3) Innocence. (4) Purity. Henry James takes the American culture a
little higher than European culture. He also considers that two different cultures
can live together in one community comfortably as long as the member of society
respects each other
CCDC 2064588: Experimental Crystal Structure Determination
No full textRelated Article: Daisy R. S. Pooler, Robin Pierron, Stefano Crespi, Romain Costil, Lukas Pfeifer, Jérémie Léonard, Massimo Olivucci, Ben L. Feringa|2021|Chemical Science|||doi:10.1039/D1SC01105
Heterocyclic light-driven rotary molecular motors
Full text linkControlling motion of molecules at the nanoscale has been an aspiration for scientists for many years. The rise of molecular machines over the past two decades has shown that it is possible to achieve this goal, and for this the 2016 Nobel Prize in Chemistry was awarded to researchers in this field. Light-driven rotary molecular motors, first developed in 1999 by Feringa and co-workers, are able to continuously rotate in a single direction when irradiated with light. This unidirectional rotation is a motion used in many machines that we rely on today, for example the motion of the wheels on a bicycle. Over the years, the exact mechanism of molecular motors has been elucidated, and we better understand how to tune their rotational properties, such as speed and efficiency. However, there are some challenges that must be addressed before light-driven molecular motors can find utility beyond scientific research; they are typically powered by high energy UV light, which is not ideal for many applications. In addition, they are typically inefficient – only absorbing up to 20% of the light shining on them – and it can be difficult to synthesise them on a large scale. The research outlined in this thesis aims to address these challenges through the use of heterocyclic motor scaffolds. Additionally, this thesis intends to inform the reader about light-driven rotary molecular motors in general, focussing on the specific design principles that can be used to tune their rotational properties, and detailing how they are studied in our labs
Enlightening dynamic functions in molecular systems by intrinsically chiral light-driven molecular motors
Full text linkChirality is a fundamental property which plays a major role in chemistry, physics, biological systems and materials science. Chiroptical artificial molecular motors (AMMs) are a class of molecules which can convert light energy input into mechanical work, and they hold great potential in the transformation from simple molecules to dynamic systems and responsive materials. Taking distinct advantages of the intrinsic chirality in these structures and the unique opportunity to modulate the chirality on demand, chiral AMMs have been designed for the development of light-responsive dynamic processes including switchable asymmetric catalysis, chiral self-assembly, stereoselective recognition, transmission of chirality, control of spin selectivity and biosystems as well as integration of unidirectional motion with specific mechanical functions. This review focuses on the recently developed strategies for chirality-led applications by the class of intrinsically chiral AMMs. Finally, some limitations in current design and challenges associated with recent systems are discussed and perspectives towards promising candidates for responsive and smart molecular systems and future applications are presented.</p
COMPARATIVE STUDY OF FEATURES FOR FINGERPRINT INDEXING
No full textFor current fingerprint indexing schemes, global textures and minutiae structures are usually utilized. To extend the existing methods of feature extraction, we study the three most popular local descriptors, SIFT, SURF and DAISY, for fingerprint indexing and give a comparison of indexing performance for evaluation of these three features on public fingerprint databases. For index construction, the locality-sensitive hashing (LSH) is used to efficiently retrieve similarity queries in a small fraction of the database. Experiments show that SURF and DAISY are applicable for fingerprint indexing as SURF features perform equally well or better than SIFT features while DAISY improves not so significantly.Computer Science, Artificial IntelligenceComputer Science, Information SystemsEngineering, Electrical & ElectronicCPCI-S(ISTP)
“It does not go as well as it could”: The Views of Melanesian Migrant Farm Workers of the Cultural, Economic and Social Benefits and Costs of Seasonal Work in New Zealand
No full textNew Zealand‟s Recognised Seasonal Employer Scheme (RSES), launched in 2007, is an example of international short-term labour migration schemes that have been developed to solve labour shortages in the destination countries, especially in the agricultural sector, and to contribute to the economic development of the labourers‟ home countries. A review of the literature identifies four main issues that have been investigated: the strengthening of the economic base of the labourers‟ home countries, how schemes contribute to adult farmer education and the transfer of technology and skills, links between migrant workers and other development strategies, and the economic and social costs of workers‟ participation in schemes. Much of this literature highlights benefits to both countries from such schemes but there are a small number of critics who question the costs of schemes to the labourers and their home countries. Little information is available on the workers‟ own views of the costs and benefits of schemes for them. This thesis focuses on the experiences of a group of labourers from Vanuatu who came to work in New Zealand under the RSES in 2009. It asks: What are the views of fly-in, fly-out (FIFO) Melanesian seasonal migrant farm workers on the cultural, economic, and social benefits and costs of working in New Zealand under the RSES? Qualitative in-depth interviews were conducted in Bislama with 12 Vanuatu RSES workers in Northland in August 2009. Thematic analysis of the interview transcripts identified four benefits recognised by the interviewees: earning monetary income for family and community back home, gaining useful knowledge and skills that could be applied back home, personal satisfaction from the work, and personal experiences of a new country and society. Four costs recognised by the interviewees were also identified: difficult working conditions, earning less money than expected, lack of freedom and choice with respect to aspects of their time in New Zealand, and the emotional difficulties of missing home and family along with implications for gender roles of being away from home. The interviewees lacked information and understanding about a number of important aspects of the RSES, and there were no effective mechanisms for them to raise and solve the problems they were encountering. This thesis offers a number of policy recommendations that not only support the effective operation of such a scheme from the host country‟s perspective but also seeks to ensure that such schemes are of genuine value to the participating workers, their families and their home countries
Controlling cyclodextrin host-guest complexation in water with dynamic pericyclic chemistry
No full textAbstract Water-soluble macrocycles are useful molecular hosts for drug delivery, stimuli-responsive materials, water purification and many other applications. However, controlling the host-guest chemistry of macrocycles such as cyclodextrins under physiologically relevant conditions is a major challenge. Here we demonstrate the use of dynamic pericyclic chemistry to derivatise guests for cyclodextrins under mild conditions, thereby turning off molecular recognition. We show that the Diels-Alder [4 + 2] cycloaddition reaction between anthracene derivatives and activated alkenes proceed rapidly, selectively and reversibly in water under ambient conditions. This reaction can be used to modulate binding of both native and modified β-cyclodextrins to the anthracene. By appropriate choice of conditions, the resulting chemical reaction network could also operate under non-equilibrium steady state conditions. Finally, alkene scavengers could induce the retro-Diels Alder reactions, allowing the use of the pericyclic reaction system as a molecular switch
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