194,315 research outputs found
On the maximum orders of elements of finite almost simple groups and primitive permutation groups
No full textER(R)GO nr 36 (1/2018) - utopias/illusion/longings (guest edited by Beata Wojewoda)
No full textFull text of ER(R)GO nr 36 (1/2018) - utopias/illusion/longings (guest edited by Beata Wojewoda)The complete issue of ER(R)GO nr 36 (1/2018) - utopie/iluzje/pragnienia (guest edited by Beata Wojewoda
Drivers of guest loyalty in the hotel industry in New Zealand: The role of staff loyalty, service quality, guest satisfaction and commitment, and the influence of loyalty programmes
No full textThis study focused on investigating the drivers of guest loyalty in the hotel industry. Specifically, the study further explored the role of staff loyalty, service quality, guest satisfaction and commitment, and the influence of loyalty programmes. The research methodology used both qualitative and quantitative methods in a two-step process comprising focus groups and self-administered surveys. Data collected from the focus groups were analyzed using CATPAC. The survey was developed from the information collected from the focus groups and a review of the literature. Data collected from the survey were analyzed using both regression and structural equation modeling. A model of guest loyalty drivers (GLDM) was proposed and validated in the study. The study contributes to the present body of knowledge in hospitality management theory as it investigated the drivers of guest loyalty. Results from the survey showed that loyalty programmes have a significant impact on guest loyalty more than staff loyalty and staff interaction, but guest satisfaction and guest affective commitment had more significant impact on guest loyalty than loyalty programmes. This study suggests some implications for hotel managers to consider before introducing or developing a loyalty programme. For example, the research shows that there are some gender differences in relation to loyalty programmes. Male guests look for better service, special treatment and collecting points, while female guests look mainly for price incentives and experiencing a unique stay. These findings indicate that hotel managers need to consider the use of different loyalty schemes for different guests. The model proposed in the study (GLDM) provided a new insight for academics and practitioners. Although, it was evident from the study that staff loyalty, staff interaction (as a dimension of service quality), guest satisfaction and commitment, and loyalty programmes are directly linked to and are capable of predicting guest loyalty in the hotel industry as drivers for guest loyalty. The study also indicates that hotel managers should not overlook staff attitude in preference to loyalty programmes; in the sense that, hotels should focus on developing interpersonal relationships between staff and guests. This study demonstrates that hotels should allocate more resources to relational marketing at both the beginning and throughout the relational exchange. The new model is of considerable interest to both academics and practioners alike; as it gives a new dimension to the interelationship between service, staff, satisfaction and guest loyalty, and lends itself to further research which will help gain a greater understanding of this interrelationship
Guest-Induced Assembly of Tetracarboxyl-Cavitand and Tetra(3-pyridyl)-Cavitand into a Heterodimeric Capsule via Hydrogen Bonds and CH−Halogen and/or CH−π Interaction: Control of the Orientation of the Encapsulated Guest
No full textThe guest- or solvent-induced assembly of a tetracarboxyl-cavitand 1 and a tetra(3-pyridyl)-cavitand 2 into a heterodimeric capsule 1·2 in a rim-to-rim fashion via four intermolecular CO2H···N hydrogen
bonds has been investigated both in solution and in the solid state. In the 1H NMR study, a 1:1 mixture of
1a and 2a (R = (CH2)6CH3) in CDCl3 gave a mixture of various complicated aggregates, whereas this
mixture in CDCl2CDCl2 or p-xylene-d10 exclusively produced the heterodimeric capsule 1a·2a. It was found
that an appropriate 1,4-disubstituted-benzene is a suitable guest for inducing the exclusive formation of
1a·2a in CDCl3. The ability of a guest to induce the formation of guest-encapsulating heterodimeric capsule,
guest@(1a·2a), increased in the order p-ethyltoluene < 1-ethyl-4-methoxybenzene ≤ 1-ethyl-4-iodobenzene
≤ 1,4-dibromobenzene < 1-iodo-4-methoxybenzene ≤ 1,4-dimethoxybenzene ≤ 1,4-diiodobenzene. The
1H NMR study revealed that a CH−halogen interaction between the inner protons of the methylene-bridge
rims (-O-HoutCHin-O-) of the 1a and 2a units and the halogen atoms of 1,4-dihalobenzenes and a CH−π
interaction between the methoxy protons of 1,4-dimethoxybenzene and the aromatic cavities of the 1a and
2a units play important roles in the formation of 1,4-dihalobenzene@(1a·2a) and 1,4-dimethoxybenzene@(1a·2a), respectively. A preliminary single-crystal X-ray diffraction analysis of guest@(1b·2b) (R = (CH2)2Ph; guest = 1-iodo-4-methoxybenzene or p-xylene) confirmed that the guest encapsulated in 1b·2b is
oriented with the long axis of the guest along the long axis of 1b·2b and that the iodo and the methoxy
groups of the encapsulated 1-iodo-4-methoxybenzene are specifically oriented with respect to the cavities
of the 2b and 1b units, respectively
Guest-Driven Self-Assembly and Chiral Induction of Photofunctional Lanthanide Tetrahedral Cages
No full textChiral luminescent lanthanide–organic
cages have many potential
applications in enantioselective recognition, sensing, and asymmetric
catalysis. However, due to the paucity of structures and their limited
cavities, host–guest chemistry with lanthanide–organic
cages has remained elusive so far. Herein, we report a guest-driven
self-assembly and chiral induction approach for the construction of
otherwise inaccessible Ln4L4-type (Ln = lanthanide
ions, i.e., EuIII, TbIII; L = ligand) tetrahedral
hosts. Single crystal analyses on a series of host–guest complexes
reveal remarkable guest-adaptive cavity breathing on the tetrahedral
cages, reflecting the advantage of the variation tolerance on coordination
geometry of the f-elements. Meanwhile, noncovalent confinement of
pyrene within the lanthanide cage not only leads to diminishment of
its excimer emission but also facilitates guest to host energy transfer,
opening up a new sensitization window for the lanthanide luminescence
on the cage. Moreover, stereoselective self-assembly of either Λ4- or Δ4- type Eu4L4 cages has been realized via chiral induction with R/S-BINOL or R/S-SPOL templates, as confirmed by NMR, circular dichroism (CD), and
circularly polarized luminescence (CPL) with high dissymmetry factors
(glum) up to ±0.125
Guest-Induced Assembly of Tetracarboxyl-Cavitand and Tetra(3-pyridyl)-Cavitand into a Heterodimeric Capsule via Hydrogen Bonds and CH−Halogen and/or CH−π Interaction: Control of the Orientation of the Encapsulated Guest
No full textThe guest- or solvent-induced assembly of a tetracarboxyl-cavitand 1 and a tetra(3-pyridyl)-cavitand 2 into a heterodimeric capsule 1·2 in a rim-to-rim fashion via four intermolecular CO2H···N hydrogen
bonds has been investigated both in solution and in the solid state. In the 1H NMR study, a 1:1 mixture of
1a and 2a (R = (CH2)6CH3) in CDCl3 gave a mixture of various complicated aggregates, whereas this
mixture in CDCl2CDCl2 or p-xylene-d10 exclusively produced the heterodimeric capsule 1a·2a. It was found
that an appropriate 1,4-disubstituted-benzene is a suitable guest for inducing the exclusive formation of
1a·2a in CDCl3. The ability of a guest to induce the formation of guest-encapsulating heterodimeric capsule,
guest@(1a·2a), increased in the order p-ethyltoluene < 1-ethyl-4-methoxybenzene ≤ 1-ethyl-4-iodobenzene
≤ 1,4-dibromobenzene < 1-iodo-4-methoxybenzene ≤ 1,4-dimethoxybenzene ≤ 1,4-diiodobenzene. The
1H NMR study revealed that a CH−halogen interaction between the inner protons of the methylene-bridge
rims (-O-HoutCHin-O-) of the 1a and 2a units and the halogen atoms of 1,4-dihalobenzenes and a CH−π
interaction between the methoxy protons of 1,4-dimethoxybenzene and the aromatic cavities of the 1a and
2a units play important roles in the formation of 1,4-dihalobenzene@(1a·2a) and 1,4-dimethoxybenzene@(1a·2a), respectively. A preliminary single-crystal X-ray diffraction analysis of guest@(1b·2b) (R = (CH2)2Ph; guest = 1-iodo-4-methoxybenzene or p-xylene) confirmed that the guest encapsulated in 1b·2b is
oriented with the long axis of the guest along the long axis of 1b·2b and that the iodo and the methoxy
groups of the encapsulated 1-iodo-4-methoxybenzene are specifically oriented with respect to the cavities
of the 2b and 1b units, respectively
Linear Approximation Method to the Nuclear Magnetic Resonance (NMR) Spectra-Based Titration Data of Inclusion Host-Guest Complexes (Part 4) -Dual Obtention of Association Constants among One Host and Two Guests from Three Ingredient Systems -
No full textBased upon the titrative 'H NMR spectral data, a new dual calculation strategy of Host-Guest association constants out of three ingredient systems (one host and two guests) is established as an application of the author's "linear approximation method". In the present study, systems involving one host and one racemic guest (= two enantiomers) are sought. Key to the new strategy is the realization that maximum chemical shift changes (Δδmax'S) are obtainable without significant deviations from true values, when data collections are done under conditions of [Host]/[Guest]= constant and simulations are done using [Guest] (= [(S)-Guest] + [(R)ーGuest])instead of [(S)-Guest] or [(R)-Guest]. Theoretical ca1culations are discussed.departmental bulletin pape
Special issue Hebron
No full textStructural Glass is defined as an application of the material glass in a main bearing structure of for example a building or a bridge. Involvement started for the author in 1986, with designing and building of the Sonsbeek pavilion and continues, up to present, with the completion of the Taipei Performing Arts Centre expected in 2019. This editorial is divided in four chapters; the first one concentrates on bridges, the second on facades, the third on cast glass and the last chapter is on future developments. Ongoing research is discussed at the end of each chapter.Applied MechanicsOLD Structural Desig
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