294 research outputs found
El cambio social
No full textThe concept of social change refers to alterations and modifications in the social behavior and the cultural values of determinated social systems and structures. In opposition to the so called social progress, social change has no teologic meaning. Social system means a structure of social processes and relations showing some regularity. The dichotomy between social statics (structures) and social dynamics (change) is therefore incorrect, because the first does not exist in reality. Cultural changes are but functions of the social changes. Among the functions which are contributions of a social system to the fundamental needs of its members to a more inclusive social system, the author distinguishes actual functions, latent or not evident functions and disfunctions (of negative effect). With regard to causation, the author points out MAV IVER\u27s classification into distributive, collective and conjunctural phenomena. To forecast and control socio-cultural phenomena, a scientific methods is necessary. After pointing out the conditions for a correct scientific methodology, the author explains the modern complementary and qualitative trends: typology, the same combined with psychology and cultural anthropology and the "functional process", which reduces social change to a manageable analytical process. Finally, he examines five basic aspects of the social change process: social deviations, innovations, the innovation valuating process the transition phase and the institutionalization processThe concept of social change refers to alterations and modifications in the social behavior and the cultural values of determinated social systems and structures. In opposition to the so called social progress, social change has no teologic meaning. Social system means a structure of social processes and relations showing some regularity. The dichotomy between social statics (structures) and social dynamics (change) is therefore incorrect, because the first does not exist in reality. Cultural changes are but functions of the social changes. Among the functions which are contributions of a social system to the fundamental needs of its members to a more inclusive social system, the author distinguishes actual functions, latent or not evident functions and disfunctions (of negative effect). With regard to causation, the author points out MAV IVER\u27s classification into distributive, collective and conjunctural phenomena. To forecast and control socio-cultural phenomena, a scientific methods is necessary. After pointing out the conditions for a correct scientific methodology, the author explains the modern complementary and qualitative trends: typology, the same combined with psychology and cultural anthropology and the "functional process", which reduces social change to a manageable analytical process. Finally, he examines five basic aspects of the social change process: social deviations, innovations, the innovation valuating process the transition phase and the institutionalization proces
El cambio social
No full textThe concept of social change refers to alterations and modifications in the social behavior and the cultural values of determinated social systems and structures. In opposition to the so called social progress, social change has no teologic meaning. Social system means a structure of social processes and relations showing some regularity. The dichotomy between social statics (structures) and social dynamics (change) is therefore incorrect, because the first does not exist in reality. Cultural changes are but functions of the social changes. Among the functions which are contributions of a social system to the fundamental needs of its members to a more inclusive social system, the author distinguishes actual functions, latent or not evident functions and disfunctions (of negative effect).
With regard to causation, the author points out MAV IVER's classification into distributive, collective and conjunctural phenomena. To forecast and control socio-cultural phenomena, a scientific methods is necessary. After pointing out the conditions for a correct scientific methodology, the author explains the modern complementary and qualitative trends: typology, the same combined with psychology and cultural anthropology and the "functional process", which reduces social change to a manageable analytical process. Finally, he examines five basic aspects of the social change process: social deviations, innovations, the innovation valuating process the transition phase and the institutionalization processInstituto de Investigaciones Económica
El cambio social
No full textThe concept of social change refers to alterations and modifications in the social behavior and the cultural values of determinated social systems and structures. In opposition to the so called social progress, social change has no teologic meaning. Social system means a structure of social processes and relations showing some regularity. The dichotomy between social statics (structures) and social dynamics (change) is therefore incorrect, because the first does not exist in reality. Cultural changes are but functions of the social changes. Among the functions which are contributions of a social system to the fundamental needs of its members to a more inclusive social system, the author distinguishes actual functions, latent or not evident functions and disfunctions (of negative effect). With regard to causation, the author points out MAV IVER's classification into distributive, collective and conjunctural phenomena. To forecast and control socio-cultural phenomena, a scientific methods is necessary. After pointing out the conditions for a correct scientific methodology, the author explains the modern complementary and qualitative trends: typology, the same combined with psychology and cultural anthropology and the "functional process", which reduces social change to a manageable analytical process. Finally, he examines five basic aspects of the social change process: social deviations, innovations, the innovation valuating process the transition phase and the institutionalization proces
A MODIFIED CASE STUDY EXAMINING THE EFFECTS OF SPECIFIC SCHOOL GRADE-LEVEL ORGANIZATIONAL MODELS ON NINTH-GRADE LEARNERS
No full textThis doctoral dissertation represents a qualitative study employing a modified case study research design that is intended to assess the perspectives of school practitioners (i.e., principals, guidance counselors, and teachers) who work with ninth graders relevant to their perceptions of the developmental needs of those students, how their respective schools address those needs, and the effects their schools’ grade-level organizational plans may have on grade nine. This study employs semi-structured interviews, document reviews, and direct observations for data collection. Two case sites were selected for this dissertation—one populated by students in grades nine through twelve (9-12) and another with pupils in grades seven through nine (7-9). Both sites were selected purposefully on the basis of their grade-level configurations, their contemporary and historical relevance to ninth-grade-level education, and their proximity to the principal researcher. Sample groups at each school included 10 practitioners who worked directly with ninth graders within a multitude of professional realms, particularly administration, counseling, and teaching. Upon site selection, building principals were recruited for participation in this study; henceforth, those subjects selected nine other participants of faculty rank based on their professional positions and affiliations with students at the ninth-grade level.
The data seems to indicate that practitioners at the grades 9-12 high school perceive ninth graders differently from that of their counterparts at the grades 7-9 junior high school. The high-school subjects generally describe ninth graders as being immature, whereas participants at the junior high school perceive them the opposite of that. It also appears that participants at the grades 9-12 site lack consensus on the attributes of ninth-grade developmental needs with some questioning the appropriateness and/or legitimacy of four-year high schools for educating students at that grade level, while others ardently support that construct. Conversely, practitioners at the grades 7-9 junior high school seem to be unified in their perspectives on ninth-grade-level development—contending that ninth graders are better educated in junior high schools versus senior high schools and that their school is developmentally appropriate and more suitable for ninth-grade learners
Pyrolysis of trifluoroacetaldehyde, initiated by di-tertiary-butyl peroxide decomposition
No full textPT: J; CR: ARTHUR NL, 1965, AUST J CHEM, V18, P1561 AYSCOUGH PB, 1956, J CHEM PHYS, V24, P994 BATT L, 1977, INT J CHEM KINET, V9, P141 COME GM, 1968, REV I R PETROLE, V23, P1365 COX DL, 1966, J CHEM SOC B, P245 DODD RE, 1957, J CHEM SOC, P1465 FERGUSON JM, 1965, J CHEM SOC, P4416 GRAY P, 1971, CHEM REV, V71, P247 HIATT R, 1972, INT J CHEM KINET, V4, P479 HIATT R, 1978, INT J CHEM KINET, V10, P185 HOOPER DG, 1975, J CHEM EDUC, V52, P131 LIU MH, 1973, CAN J CHEM, V51, P2292 LIU MTH, 1968, CAN J CHEM, V46, P479 LIU MTH, 1977, INT J CHEM KINET, V9, P589 MORRIS ER, 1967, T FARADAY SOC, V63, P2470 MORRIS ER, 1968, T FARADAY SOC, V64, P3027 PEARCE C, 1971, J CHEM SOC CHEM COMM, P1464 SHAW DH, 1968, CAN J CHEM, V46, P2721 SHEPP A, 1956, J CHEM PHYS, V24, P939 WIJNEN MHJ, 1960, J AM CHEM SOC, V82, P1847 YEEQUEE MJ, 1968, J PHYSICAL CHEMISTRY, V72, P2824 YEEQUEE MJ, 1968, T FARADAY SOC, V64, P1296; NR: 22; TC: 10; J9: CAN J CHEM; PG: 10; GA: HN360Source type: Electronic(1
Replication Data for: Multinuclear solid-state NMR investigation of structurally diverse low-dimensional hybrid metal halide perovskites
No full textThis dataset contains NMR data files that were included in the peer-reviewed journal article: Hooper, T. J. N.; Febriansyah, B.; Krishnamoorthy, T.; D. Wong, W. P.; Xue, K.; W. Ager, J.; Mathews, N. Journal of Materials Chemistry A 2024, 12 (35), 23461–23474. https://doi.org/10.1039/D4TA02833C. A link to this dataset is provided in the Data Availability Statement of the article to adhere to the author guidelines of the Royal Society of Chemistry. The NMR data is used in the article to compare the atomic-scale structure and molecular dynamics of metal halide perovskites with different structural dimensionalities. It is hoped that this insight will enable better material design of metal halide perovskite materials for optoelectronic devices
Biochemistry / David Hames and Nigel Hooper.
No full textPreviously published in 2000 as: Instant notes.Includes bibliographical references (p. 419-424) and index.vi, 438 pages. :A major update of the highly popular second edition, with changes in the content and organisation that reflect advances in the subject. As with the first two editions, the third edition of Instant Notes in Biochemistry provides the essential facts of biochemistry with detailed explanations and clear illustrations. It also includes new and expanded topics such as cytoskeleton, molecular motors, bioimaging, biomembranes, cell signaling, protein structure and enzymes regulation
Lycopodina nikitawimandi Ekins & Erpenbeck & Hooper 2020, sp. nov.
No full textLycopodina nikitawimandi sp. nov. Figures 27 & 28, Tables 14 & 16 urn:lsid:zoobank.org:act: F5AAEA15-DBAF-4A21-A2B9-E336733E613D Material examined: Holotype QM G337534 off Freycinet Peninsular, Tasman Sea, Station 11, Tasmania, Australia, 41° 43’ 14.5”S, 149° 7’ 30.7” E, 2793 m, Box Corer, Coll. Merrick Ekins on RV Investigator, Cruise IN2017_ V03, Sample 11-110.2, 19/v/2017, growing on a skeleton of a hexactinellid. Paratypes: QM G337510 same collection details and hexactinellid skeleton as for holotype, Sample 11-110.1; QM G337537 same collection details and hexactinellid skeleton as holotype, Sample 11-110.3; QM G337549 same collection details and hexactinellid skeleton as holotype, Sample 11-110.4; QM G337197 same collection details as holotype but on a different hexactinellid skeleton, Sample 11-120.1; QM G337514 off Central New South Wales, Tasman Sea, Station 89, New South Wales, Australia, 30° 15’ 47.9”– 30° 17’ 21.5” S, 153° 51’ 31.3”– 153° 50’ 37.7” E, 4436– 4414 m, Brenke Epibenthic Sledge, Coll. Merrick Ekins on RV Investigator, Cruise IN2017_ V03, Sample 89-129, 6/vi/2017, growing on worm tubes. Etymology: Named for the son of the first author, Nikita Wimandi Ekins. Distribution. Central East coast and central Tasmania, Tasman Sea, Australia, at bathyal to abyssal depths. Description: Growth form: This sponge is an erect stipitate sponge with filaments radiating in all directions projecting from the cylindrical stalk (Figures 27 A, 28 C). The body is 28 mm in length and 1–2 mm in width. The filaments are 2–3 mm in length and between 50–250 µm in width, and cover approximately 80% of the upper stem. The sponge has a spherical basal region of 3 mm diameter, with protruding smaller mycalostyles (Figure 28 F). This basal holdfast region grows within a hard or consolidated substrate. Many specimens appear to be a 2 dimensional feather due to damage sustained during collection. Colour: Pale cream on deck and in ethanol. Ectosomal skeleton: The ectosomal skeleton is thin and membranous and contains the anisochelae (Figure 28 E). Endosomal skeleton: The axis of the peduncle and the filaments consist of bundles of mycalostyles longitudinally arranged (Figure 28 D). Megascleres: Large mycalostyles only occurring in the main axis (1040–1910 x 12–37 µm, n=132) (Figure 27 C–D). Smaller mycalostyles consistent throughout the sponge including the filaments and basal holdfast (209–992 x 3–19 µm, n=250) (Figure 27 E–F) (see Table 16) * Most of the specimen disappeared off the SEM stub before the measurements of the large styles, which were present, could be made. Microscleres: Palmate anisochelae with the frontal upper alae nearly fully detached from the two lateral alae, and the three lower alae nearly completely fused to each other and the fimbria, with the frontal lower alae bearing three terminal spines and each of the lateral alae with two terminal spines (9–18 µm (length) x 2–6 µm (large alae width), 3–4 µm (small alae width), n=258) (Figure 27 B) (see Table 16). Molecular data: The 28 S sequences of QM G 337197 and QM G 337534 are provided in the Sponge Barcoding Database under accession numbers SBD#2304, SBD#2305 respectively and the molecular difference to other congenerics displayed in Figure 3. Remarks: Of the 29 described species of Lycopodina six have stipitate growth form, numerous large filaments along most of the stem, an enlarged basal attachment (where known), and only simple spiculation of styles or mycalostyles as structural megascleres, and palmate anisochelae as microscleres (Table 14). Lycopodina drakensis Goodwin, Berman, Downey & Hendry, 2017, also has forceps microscleres, and the shorter mycalostyles occur in the stem and the longest ones in the filaments, the opposite of those in L. nikitawimandi sp. nov. Lycopodina lycopodium (Levinsen, 1887) and L. occidentalis (Lambe, 1893) have a similar distribution of short and long styles in the stem, body, filaments and basal attachment, but these are generally smaller than those of the new species, and both species also have forceps microscleres. Lycopodina robusta (Levinsen, 1887) has significantly smaller styles and also possesses forceps, L. tendali Hestetun et al., 2017 has larger styles that are uniformly distributed and forceps, and L. vaceleti (Van Soest & Baker, 2011) has similar mycalostyles in the stem as L. nikitawimandi sp. nov., but also has a second category of smaller styles in the filaments and body, two categories of anisochelae, one of which has a unique sigma-like shape, and forceps microscleres (Table 14).Published as part of Ekins, Merrick, Erpenbeck, Dirk & Hooper, John N. A., 2020, Carnivorous sponges from the Australian Bathyal and Abyssal zones collected during the RV Investigator 2017 Expedition, pp. 1-159 in Zootaxa 4774 (1) on pages 141-144, DOI: 10.11646/zootaxa.4774.1.1, http://zenodo.org/record/382514
Src Family Tyrosine Kinase Signaling in Mouse and Human Embryonic Stem Cells
No full textEmbryonic stem (ES) cells are derived from the inner cell mass of the blastocyst stage embryo and are characterized by self-renewal and pluripotency. Previous work has implicated the Src family of protein-tyrosine kinases (SFKs) in the self-renewal and differentiation of mouse ES (mES) cells. These kinases display dynamic expression and activity changes during ES cell differentiation, suggesting distinct functions in the control of developmental fate. To test the hypothesis that c-Src and its closest phylogenetic relative, c-Yes, act in biological opposition to one another, I first showed that enforced expression of active c-Yes blocked ES cell differentiation to embryoid bodies by maintaining pluripotency gene expression. To determine the interplay of c-Src and c-Yes in mES cell fate determination, I employed a chemical genetics approach to generate c-Src and c-Yes mutants that are resistant to A-419259, a potent pyrrolopyrimidine inhibitor of the Src kinase family. This method allowed us to investigate individual kinase function in the presence of A-419259. I found that c-Src activity alone induces mES cell differentiation to the ectoderm and endoderm, while c-Yes inhibits this process. These studies show that even closely related kinases such as c-Src and c-Yes have unique and opposing functions in the same cell type.
While Src kinase signaling has been investigated in mES cells, the role of this kinase family in human ES (hES) cells is largely unknown. Using quantitative real-time RT-PCR, I determined the relative expression profile of individual SFK members in undifferentiated hES cells vs. embryoid bodies derived from them. Like mES cells, hES cells express multiple SFK members with dynamic transcription changes during EB differentiation, indicating that individual members may play non-redundant roles. To assess the role of SFK activity in hES cells, I treated hES cell cultures with SFK inhibitors. SFK inhibition maintained hES cell colony morphology and expression of the pluripotency marker Tra-1-60 in differentiation medium. These observations support a role for Src family kinase signaling in the regulation of hES fate, and suggest that some parallels may exist in mouse and human ES cells for this intracellular signaling network
Explorations of structure and choice in taxing capital gains: New Zealand tax experts' perspectives
No full textThis study explores the key issues, aspects, and attributes concerning capital gains tax (CGT) to enable the formulation of policy guidelines that might be used if a CGT were considered in New Zealand. It contends that the development of the New Zealand’s policy on taxing capital gains has continued in a somewhat ad hoc and inconsistent fashion. The lack of a uniform approach to capital gains taxation has resulted in detailed, but complex, legislation which leads to “policy inconsistencies and unintended incentives built into the tax structure” (Oliver, 2001, pp. 80 – 81). The study bridges the divide between theoretical analysis of CGT and implementation issues on operating a CGT. It attempts to address one primary research question and an associated secondary question. The primary research question is: should capital gains be taxed more comprehensively than at present? As a start, it examines the two important issues surrounding income definition and the capital/income distinction. In this regard, the research first attempts to identify the definition(s) of capital gains from the New Zealand perspective(s). This is followed by investigating the key areas of the tax system in order to seek the best way of taxing capital gains. This study also attempts to address the secondary research question, i.e., why (or why not) do the tax experts favour (or oppose) a comprehensive CGT? In this respect, this study identifies 23 factors/issues that are related to the tax experts’ attitudes towards a particular form of a CGT model (i.e., current hybrid approach, a realisation-based CGT or an accrual-based CGT). A mixed-methods design has been adopted in this study involving both a quantitative (survey) and a qualitative (interview) method in analysing the data to determine the tax experts’ overall perceptions of a CGT in New Zealand and the CGT adoption factors which influenced them. One important finding of the comparative analyses was that all tax experts generally agreed that the lack of a comprehensive CGT could provide more significant tax planning opportunities. However, many tax experts did not support the comprehensive income concept as they disagreed with the benefits derived from the gains in horizontal equity through adopting a CGT. This study has identified several important policy issues and reviewed their implication for the adoption of a CGT in New Zealand. The finding of the study revealed that the tax experts strongly supported the exemption of the gains on disposal of a taxpayer’s main residence and the tax preference for inflation adjustment. Another important policy issue is the implementation of an accrual-based CGT. Most tax experts considered a realisation-based CGT would be better than an accrual one. In particular, they were concerned about the liquidity problems and the compliance costs involved in an accrual-based CGT regime i.e., the annual valuation of all assets. These findings represent a first step towards a theoretical CGT framework. It is hoped that the knowledge gained in this study would give a greater understanding into the practical decision-making process that could result in a better public acceptance for a tax reform
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