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  • 1
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 2020
    In:  Bulletin of Entomological Research Vol. 110, No. 3 ( 2020-06), p. 388-396
    In: Bulletin of Entomological Research, Cambridge University Press (CUP), Vol. 110, No. 3 ( 2020-06), p. 388-396
    Abstract: Body size is an important life-history trait in eusocial insects which plays a key role in colony fitness. The division of labour, represented by caste polyethism, correlates with divergent morphological traits. Size polymorphism has been noted in the tropical fire ant, Solenopsis geminata ; however, little is known regarding the differences in the size distributions of workers performing foraging tasks. In the present study, task partitioning was observed in the foraging activities of S . geminata . Two subgroups among foraging workers of S . geminata were discovered using the Gaussian mixture model: a large worker group (head width ≥ 0.924 mm) and a small worker group (head width 〈 0.924 mm). The foraging worker population comprised two distinct groups – 25.64% were large workers and 74.36% were small workers. Larger workers delivered heavier seeds faster than smaller workers, but this difference became less apparent when lighter seeds were being carried. When large prey such as crickets was encountered during foraging, S. geminata partitioned their tasks into cutting and transportation. The large workers were observed to cut cricket prey into fragments with their longer mandibles, and the small workers then transported these fragments back to the nest. These results present evidence of task partitioning among tropical fire ants, with different tasks being performed by ants of different castes.
    Type of Medium: Online Resource
    ISSN: 0007-4853 , 1475-2670
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1496538-0
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 2015
    In:  Parasitology Vol. 142, No. 8 ( 2015-07), p. 1130-1142
    In: Parasitology, Cambridge University Press (CUP), Vol. 142, No. 8 ( 2015-07), p. 1130-1142
    Abstract: Parasitic castration is a strategy used by parasites to minimize damage to the host by consuming its reproductive system, which results in the morphological alteration of the host. We determined that the forewing shape and density of the antennal sensilla of field-collected adult male mantids ( Hierodula formosana ), infected by horsehair worms ( Chordodes formosanus ) was partially feminized (intersexuality), and both male and female mantids infected by horsehair worms exhibited allometric changes in their wings and walking legs. In addition, the testes of most infected male adults disappeared or reduced in size, whereas the number of ovarioles in infected female adults was unaffected. The infection mainly influenced the structures related to host reproduction and locomotion, suggesting unbalanced energy exploitation and the reduction of parasitic virulence. In addition, the intersexuality of infected male adults indicated that sexual differentiation in insects, which researchers have considered to be an autonomous process, was influenced by the infection. The similarity of the antennae of infected male adults with those of last-instar female nymphs suggested that parasitic juvenilization may cause such feminization, but the mechanism of parasitic influence on insect sex characteristics should be studied further.
    Type of Medium: Online Resource
    ISSN: 0031-1820 , 1469-8161
    RVK:
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2015
    detail.hit.zdb_id: 1491287-9
    SSG: 12
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  • 3
    In: International Psychogeriatrics, Cambridge University Press (CUP), Vol. 29, No. 2 ( 2017-02), p. 259-267
    Abstract: Anxiety disorders are prevalent yet under-recognized in late life. We examined the prevalence of anxiety disorders in a representative sample of community dwelling older adults in Hong Kong. Method: Data on 1,158 non-demented respondents aged 60–75 years were extracted from the Hong Kong Mental Morbidity survey (HKMMS). Anxiety was assessed with the revised Clinical Interview Schedule (CIS-R). Result: One hundred and thirty-seven respondents (11.9%, 95% CI = 10–13.7%) had common mental disorders with a CIS-R score of 12 or above. 8% (95% CI = 6.5–9.6%) had anxiety, 2.2% (95% CI = 1.3–3%) had an anxiety disorder comorbid with depressive disorder, and 1.7% (95% CI = 1–2.5%) had depression. Anxious individuals were more likely to be females ( χ 2 = 25.3, p 〈 0.001), had higher chronic physical burden ( t = −9.3, p 〈 0.001), lower SF-12 physical functioning score ( t = 9.2, p 〈 0.001), and poorer delayed recall ( t = 2.3, p = 0.022). The risk of anxiety was higher for females (OR 2.8, 95% C.I. 1.7–4.6, p 〈 0.001) and those with physical illnesses (OR 1.4, 95% C.I. 1.3–1.6, p 〈 0.001). The risk of anxiety disorders increased in those with disorders of cardiovascular (OR 1.9, 95% C.I. 1.2–2.9, p = 0.003), musculoskeletal (OR 2.0, 95% C.I. 1.5–2.7, p 〈 0.001), and genitourinary system (OR 2.0, 95% C.I. 1.3–3.2, p = 0.002). Conclusions: The prevalence of anxiety disorders in Hong Kong older population was 8%. Female gender and those with poor physical health were at a greater risk of developing anxiety disorders. Our findings also suggested potential risk for early sign of memory impairment in cognitively healthy individuals with anxiety disorders.
    Type of Medium: Online Resource
    ISSN: 1041-6102 , 1741-203X
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2017
    detail.hit.zdb_id: 2147136-8
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  • 4
    In: Psychological Medicine, Cambridge University Press (CUP), Vol. 53, No. 6 ( 2023-04), p. 2339-2351
    Abstract: Contrasting the well-described effects of early intervention (EI) services for youth-onset psychosis, the potential benefits of the intervention for adult-onset psychosis are uncertain. This paper aims to examine the effectiveness of EI on functioning and symptomatic improvement in adult-onset psychosis, and the optimal duration of the intervention. Methods 360 psychosis patients aged 26–55 years were randomized to receive either standard care (SC, n = 120), or case management for two (2-year EI, n = 120) or 4 years (4-year EI, n = 120) in a 4-year rater-masked, parallel-group, superiority, randomized controlled trial of treatment effectiveness (Clinicaltrials.gov: NCT00919620). Primary (i.e. social and occupational functioning) and secondary outcomes (i.e. positive and negative symptoms, and quality of life) were assessed at baseline, 6-month, and yearly for 4 years. Results Compared with SC, patients with 4-year EI had better Role Functioning Scale (RFS) immediate [interaction estimate = 0.008, 95% confidence interval (CI) = 0.001–0.014, p = 0.02] and extended social network (interaction estimate = 0.011, 95% CI = 0.004–0.018, p = 0.003) scores. Specifically, these improvements were observed in the first 2 years. Compared with the 2-year EI group, the 4-year EI group had better RFS total ( p = 0.01), immediate ( p = 0.01), and extended social network ( p = 0.05) scores at the fourth year. Meanwhile, the 4-year ( p = 0.02) and 2-year EI ( p = 0.004) group had less severe symptoms than the SC group at the first year. Conclusions Specialized EI treatment for psychosis patients aged 26–55 should be provided for at least the initial 2 years of illness. Further treatment up to 4 years confers little benefits in this age range over the course of the study.
    Type of Medium: Online Resource
    ISSN: 0033-2917 , 1469-8978
    RVK:
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2023
    detail.hit.zdb_id: 1470300-2
    SSG: 5,2
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  • 5
    In: Psychological Medicine, Cambridge University Press (CUP), Vol. 51, No. 14 ( 2021-10), p. 2501-2508
    Abstract: The relationship between the subtypes of psychotic experiences (PEs) and common mental health symptoms remains unclear. The current study aims to establish the 12-month prevalence of PEs in a representative sample of community-dwelling Chinese population in Hong Kong and explore the relationship of types of PEs and common mental health symptoms. Method This is a population-based two-phase household survey of Chinese population in Hong Kong aged 16–75 ( N = 5719) conducted between 2010 and 2013 and a 2-year follow-up study of PEs positive subjects ( N = 152). PEs were measured with Psychosis Screening Questionnaire (PSQ) and subjects who endorsed any item on the PSQ without a clinical diagnosis of psychotic disorder were considered as PE-positive. Types of PEs were characterized using a number of PEs (single v . multiple) and latent class analysis. All PE-positive subjects were assessed with common mental health symptoms and suicidal ideations at baseline and 2-year follow-up. PE status was also assessed at 2-year follow-up. Results The 12-month prevalence of PEs in Hong Kong was 2.7% with 21.1% had multiple PEs. Three latent classes of PEs were identified: hallucination, paranoia and mixed. Multiple PEs and hallucination latent class of PEs were associated with higher levels of common mental health symptoms. PE persistent rate at 2-year follow-up was 15.1%. Multiple PEs was associated with poorer mental health at 2-year follow-up. Conclusions Results highlighted the transient and heterogeneous nature of PEs, and that multiple PEs and hallucination subtype of PEs may be specific indices of poorer common mental health.
    Type of Medium: Online Resource
    ISSN: 0033-2917 , 1469-8978
    RVK:
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2021
    detail.hit.zdb_id: 1470300-2
    SSG: 5,2
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  • 6
    In: Psychological Medicine, Cambridge University Press (CUP), Vol. 53, No. 9 ( 2023-07), p. 4103-4113
    Abstract: A proportion of patients with bipolar disorder (BD) manifests with only unipolar mania (UM). This study examined relevant clinical features and psychosocial characteristics in UM compared with depressive-manic (D-M) subgroups. Moreover, comorbidity patterns of physical conditions and psychiatric disorders were evaluated between the UM and D-M groups. Methods This clinical retrospective study ( N = 1015) analyzed cases with an average of 10 years of illness duration and a nationwide population-based cohort ( N = 8343) followed up for 10 years in the Taiwanese population. UM was defined as patients who did not experience depressive episodes and were not prescribed adequate antidepressant treatment during the disease course of BD. Logistic regression models adjusted for relevant covariates were used to evaluate the characteristics and lifetime comorbidities in the two groups. Results The proportion of UM ranged from 12.91% to 14.87% in the two datasets. Compared with the D-M group, the UM group had more psychotic symptoms, fewer suicidal behaviors, a higher proportion of morningness chronotype, better sleep quality, higher extraversion, lower neuroticism, and less harm avoidance personality traits. Substantially different lifetime comorbidity patterns were observed between the two groups. Conclusions Patients with UM exhibited distinct clinical and psychosocial features compared with patients with the D-M subtype. In particular, a higher risk of comorbid cardiovascular diseases and anxiety disorders is apparent in patients with D-M. Further studies are warranted to investigate the underlying mechanisms for diverse presentations in subgroups of BDs.
    Type of Medium: Online Resource
    ISSN: 0033-2917 , 1469-8978
    RVK:
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2023
    detail.hit.zdb_id: 1470300-2
    SSG: 5,2
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  • 7
    Online Resource
    Online Resource
    Cambridge University Press (CUP) ; 2012
    In:  Proceedings of the International Astronomical Union Vol. 8, No. S289 ( 2012-08), p. 344-347
    In: Proceedings of the International Astronomical Union, Cambridge University Press (CUP), Vol. 8, No. S289 ( 2012-08), p. 344-347
    Abstract: The Hubble constant can be determined from the time delay of gravitationally lensed systems. We adopt T e V e S as the relativistic version of Modified Newtonian Dynamics to study gravitational lensing phenomena and evaluate the Hubble constant from the derived time-delay formula. We test our method on observed quasar lensing published in the literature. Three candidates are suitable for our study, HE 2149-2745, FBQ J0951+2635, and SBS 0909+532.
    Type of Medium: Online Resource
    ISSN: 1743-9213 , 1743-9221
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2012
    detail.hit.zdb_id: 2170724-8
    SSG: 16,12
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  • 8
    In: Public Health Nutrition, Cambridge University Press (CUP), Vol. 12, No. 04 ( 2009-4), p. 570-
    Type of Medium: Online Resource
    ISSN: 1368-9800 , 1475-2727
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2009
    detail.hit.zdb_id: 2016337-X
    SSG: 21
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  • 9
    In: Cardiology in the Young, Cambridge University Press (CUP), Vol. 4, No. 1 ( 1994-01), p. 44-50
    Abstract: A total of 80 patients, diagnosed by echocardiography as having ventricular septal defect with aortic valvar prolapse, underwent cardiac catheterization and surgery. Echocardiographic and angiographic results were compared with surgical findings. The ventricular septal defects as observed during surgery were found to be doubly committed and subarterial in 49 (61%), muscular outlet in 10 (13%), and perimembranous in 21(26%). The location had been erroneously categorized by echocardiography and angiography in 12 (15%) and in 15 (19%) patients, respectively. Prolapse of the right coronary leaflet of the aortic valve, as documented by echocardiography, was confirmed by angiography in all but two cases. Prolapse of the noncoronary leaflet was detected by both imaging modalities in three patients. Prolapse of the right coronary and noncoronary leaflets was observed at surgery in 49 and three patients, respectively. The mean size of the ventricular septal defect, when measured by echocardiography, was significantly smaller than that found following surgical measurements (3.3±1.3 vs 8.4±3.8 mm, p 〈 0.001). Our study showed that the ventricular septal defect was erroneously classified in the presence of prolapse of the aortic valve in 15% and 19% of our cases by echocardiography and angiography, respectively. The herniated sinus of Valsalva forming the “roof” of the ventricular septal defect probably redirected the jet across the defect to cause the errors in interpretation. Echocardiography, nevertheless, is as reliable as angiography in our hands in the follow-up of patients with ventricular septal defect opening to the outlet of the right ventricle.
    Type of Medium: Online Resource
    ISSN: 1047-9511 , 1467-1107
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1994
    detail.hit.zdb_id: 2060876-7
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