bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermo-Hydraulic Characteristics Evaluation of a Triangular Solar Air Heater Duct Having Transverse Ribs With Gaps: An Experimental Study
Authors: Mahanand Yadaba , Senapati Jnana Ranjan 
Published: December 2023

Abstract
An experimental investigation is carried out to analyze the thermo-hydraulic characteristics of a triangular solar air heater duct having transverse ribs with gaps. The roughness parameters, such as non-dimensional pitch (P/e or P¯) and non-dimensional height (e/Dh or e¯) are kept in the range of 4.88–20 and 0.021–0.044, respectively. Reynolds number (Re) is kept in the range of 4000–18,000. Two and three gaps of each of 0.01 m are provided to each odd and even number ribs, respectively. Non-dimensional primary width (w1/W) and non-dimensional secondary width (w2/W) are kept constant at 0.29 and 0.4, respectively. A maximum heat transmission of 3.14 times that of the base model is achieved for the transverse ribs with gaps having non-dimensional pitch and height of 9.76 and 0.044, respectively, at Re = 18,000. In the parametric range, the highest friction factor of 3.88 times the base model is encountered for the non-dimensional pitch and height of 4.88 and 0.044, respectively, at Re = 4000. The highest thermal enhancement ratio of 2.31 is reported for the non-dimensional pitch and height of 9.76 and 0.044, respectively, at Re = 18,000. The correlation for the Nusselt number and friction factor is formulated, agreeing with experimental data within ±12% and ±8% deviation, respectively.
Numerical Point Contact Model of Mixed Elastohydrodynamic Lubrication for Transversely Isotropic Coating
Authors: Pei Xin , Yang Wanyou , Liu Shuang , Guo Haotian , Zhou Qinghua 
Published: December 2023

Abstract
Transverse isotropy, a typical property of coating providing protection or lubrication for transmission parts, is different from isotropy focused in most of previous research, catching increasing attention in recent years. This study aims to make the lubricating contact behavior of transversely isotropic coating under different working conditions better understood, with the assistance of a proposed mixed elastohydrodynamic lubrication (EHL) model for a rigid ball in contact with transversely isotropic coating. Explicit analytical expressions of frequency response functions (FRFs) of the elastic field for transversely isotropic coating were derived, which could be used to work out surface/subsurface displacement and stress if surface pressure is known. The proposed EHL model for transversely isotropic coating was verified by comparing the film thickness and pressure distribution with those from literature by an uncoated model. Furthermore, the effects of coating elastic property, coating thickness, velocity, and load on lubrication performance and mechanical responses are investigated. In addition, the results under different coating parameters are also compared and discussed with those obtained by the Hamrock–Dowson equations to demonstrate the effectiveness of the latter. This investigation may provide a potential application for coating optimal design considering lubrication.
Low-Temperature Superplasticity of the 1565ch Al–Mg Alloy in Ultrafine-Grained and Nanostructured States
Authors: Bobruk E. V. , Ramazanov I. A. , Astanin V. V. , Zaripov N. G. , Kazykhanov V. U. , Drits A. M. , Murashkin M. Yu. , Enikeev N. A. 
Published: December 2023

Abstract—
Homogeneous nanostructured and ultrafine grained (NS, UFG) states with mean grain sizes of 95 and 200 nm, respectively, have been formed in a 1565ch Al–Mg alloy (Al–5.66Mg–0.81Mn–0.67Zn–0.09Zr–0.07Cr–0.04Ti–0.001Be–0.3(Fe + Si) wt %). Microstructure of both states is represented by grain boundaries with predominantly high-angle misorientations. The alloy, produced both by high pressure torsion at room temperature and equal channel angular pressing at 200°C using the Conform approach, exhibits superplasticity at low temperatures in the range 250–300°C and strain rates in the range of 5 × 10–4–10–2 s–1. Elongation values range 170–560%, while the rate sensitivity coefficient (m) varies from 0.3 to 0.73 at low flow stress for both NS and UFG structures. The temperature range for the stability of strength properties of the 1565ch alloy in NS and UFG states after thermal and thermal mechanical treatments has been determined. The material in both structural states maintains a high level of strength after undergoing deformation under SP conditions. The deformation relief formed on the gage surface of the NS and UFG specimens of the 1565ch alloy during the established SP yield stage has been analyzed.
Higher-order asymptotic corrections and their application to the Gamma Variance Model
Authors: Canonero Enzo , Brazzale Alessandra Rosalba , Cowan Glen 
Published: December 2023

AbstractWe present improved methods for calculating confidence intervals andpvalues in situations where standard asymptotic approaches fail due to small sample sizes. We apply these techniques to a specific class of statistical model that can incorporate uncertainties in parameters that themselves represent uncertainties (informally, “errors on errors”) called the Gamma Variance Model. This model contains fixed parameters, generically denoted by$$\varepsilon $$ε, that represent the relative uncertainties in estimates of standard deviations of Gaussian distributed measurements. If the$$\varepsilon $$εparameters are small, one can construct confidence intervals andpvalues using standard asymptotic methods. This is formally similar to the familiar situation of a large data sample, in which estimators for all adjustable parameters have Gaussian distributions. Here we address the important case where the$$\varepsilon $$εparameters are not small and as a consequence the first-order asymptotic distributions do not represent a good approximation. We investigate improved test statistics based on the technology of higher-order asymptotics (modified likelihood root and Bartlett correction). The effective application of higher-order corrections removes an important computational barrier to the use of the Gamma Variance Model.
The mass spectrum and strong decay properties of the charmed-strange mesons within Godfrey–Isgur model considering the coupled-channel effects
Authors: Yang Jing-Jing , Wang Xiaoyu , Li De-Min , Li Yu-Xiao , Wang En , Hao Wei 
Published: December 2023

AbstractMotivated by the recently observed $$D_{s0}(2590)$$

D

s
0

(
2590
)

state by LHCb, we investigate the mass spectrum and the strong decay properties of the charmed-strange mesons within the Godfrey–Isgur model considering the coupled-channel effects. One finds that the $$D^*K^*$$

D
∗

K
∗

contributions to the mass shifts are large for all the charmed-strange states, which is maybe due to the spin-enhancement effect. Our results support that $$D_{s0}^*(2317)$$

D

s
0

∗

(
2317
)

and $$D_{s1}(2460)$$

D

s
1

(
2460
)

could be interpreted as the $$D_{s}(1^3P_0)$$

D
s

(

1
3

P
0

)

and $$D_{s}(1^3P_1)$$

D
s

(

1
3

P
1

)

states with larger DK and $$D^*K$$

D
∗

K

components, respectively, although the probabilities of the DK and $$D^*K$$

D
∗

K

components for $$D_{s0}^*(2317)$$

D

s
0

∗

(
2317
)

and $$D_{s1}(2460)$$

D

s
1

(
2460
)

are smaller than other theoretical predictions, which may be due to our neglect of the direct interaction of the meson components. Meanwhile, $$D_{s1}(2700)$$

D

s
1

(
2700
)

, $$D_{s1}(2536)$$

D

s
1

(
2536
)

, $$D^*_{s2}(2573)$$

D

s
2

∗

(
2573
)

, $$D_{s1}^*(2860)$$

D

s
1

∗

(
2860
)

, $$D_{s3}^*(2860)$$

D

s
3

∗

(
2860
)

, and $$D_{sJ}^*(3040)$$

D

sJ

∗

(
3040
)

could be well interpreted as the $$D_s(2^3S_1)$$

D
s

(

2
3

S
1

)

, $$D_s(1^1P_1)$$

D
s

(

1
1

P
1

)

, $$D_s(1^3P_2)$$

D
s

(

1
3

P
2

)

, $$D_s(1^3D_1)$$

D
s

(

1
3

D
1

)

, $$D_s(1^3D_3)$$

D
s

(

1
3

D
3

)

, and $$D_s(2^1P_1)$$

D
s

(

2
1

P
1

)

states, respectively. Although the $$D_{s0}(2590)$$

D

s
0

(
2590
)

mass is about 50 MeV less than our prediction for the $$D_{s0}(2S)$$

D

s
0

(
2
S
)

state, its width is still in good agreement with the one of $$D_{s0}(2S)$$

D

s
0

(
2
S
)

. Therefore, $$D_{s0}(2590)$$

D

s
0

(
2590
)

state needs to be further confirmed by the experimental measurements, and the more precise information about $$D_{s0}(2590)$$

D

s
0

(
2590
)

will shed light on its assignment of $$D_{s0}(2S)$$

D

s
0

(
2
S
)

. Furthermore, we predict the masses and the strong decay properties of the charmed-strange mesons with masses around 3 GeV, which would be helpful to experimentally search for these states.
Cosmological reconstruction and $$\Lambda $$CDM universe in $$f(Q,\,C)$$ gravity
Authors: Gadbail Gaurav N. , De Avik , Sahoo P. K. 
Published: December 2023

AbstractSymmetric Teleparallel Gravity allows for the reformulation of gravity in the form of nonmetricity by vanishing the contorsion term in the generic affine connection. Our focus is on investigating a recently proposed extension of this theory in which the Lagrangian has the form f(Q, C) by incorporating the boundary term C. In this work, we first use a reconstruction approach in f(Q, C) gravity that might admit the $$\Lambda $$
Λ
CDM expansion history. Furthermore, we perform a novel approach for cosmological reconstruction of f(Q, C) gravity in terms of e-folding, and it shows how any FLRW cosmology can arise from a specific f(Q, C) gravity. A variety of instances are provided using this approach in which f(Q, C) gravity is reconstructed to yield the well-known cosmic evolution: $$\Lambda $$
Λ
CDM era, acceleration/deceleration era which is equivalent to the presence of phantom and non-phantom matter, late-time acceleration with the crossing of phantom-divide line and transient phantom era.
A taxonomic revision of Aloe sect. Purpurascentes (Asphodelaceae subfam. Alooideae)
Authors: KLOPPER RONELL R. , GRACE OLWEN M. , KLOPPER ARRIE W. , SMITH GIDEON F. , WYK ABRAHAM E. VAN 
Published: December 2023

Aloe sect. Purpurascentes, or the speckled aloes (not to be confused with the maculate aloes, which are members of A. sect. Pictae), occurs in southern and western South Africa and southern Namibia. This section is here revised using macro-morphology, seed morphology, palynology, chemistry, and molecular evidence. Seed morphology, palynology, chemistry, and to a greater extent molecular markers, are shown to be inconclusive for demarcation at species level in A. sect. Purpurascentes. Nonetheless, evidence from these sources does provide support for the general coherence of the group. Although some species can be clearly differentiated from most other members of A. sect. Purpurascentes, the results are not consistent among the different character sets investigated. No changes are thus proposed here in terms of the placement of taxa within the section. Two species suspected to be members of the section under study (A. pictifolia and A. chlorantha), although being chemically related, do not cluster with the rest of the members of A. sect. Purpurascentes in the morphological analysis, and evidence on the sectional placement of these taxa from molecular analyses is inconclusive. Hence, these two aloes are here excluded from A. sect. Purpurascentes. The most useful evidence to distinguish among taxa in A. sect. Purpurascentes were those from comparative morphology. In this revision five species are retained: A. framesii, A. gariepensis, A. khamiesensis, A. microstigma, and A. succotrina. The following taxonomic changes are proposed: A. knersvlakensis becomes a subspecies of A. khamiesensis; aberrant populations of the latter species from the Hantam region are described as A. khamiesensis subsp. hantamensis; A. juttae is reinstated at subspecific level under A. microstigma; A. amoena is reinstated at subspecific level under A. framesii, and a third subspecies, A. framesii subsp. maraisii, is described for the southern populations of this aloe. Lectotypes are designated for five names and epitypes for three names. The notion that DNA barcodes should not be seen as a replacement technique for comprehensive taxonomic analysis is clearly illustrated in this revision of A. sect. Purpurascentes. Since traditional barcodes are insufficient to distinguish samples at species level, alpha taxonomic techniques are essential to delimit species in this group of aloes, and likely for all other aloes.
Review of the genus Arhaconortus Belokobylskij, 2000 (Hymenoptera: Braconidae: Doryctinae), with description of three new species from Vietnam
Authors: OANH NGUYEN THI , LONG KHUAT DANG , HIEP NGUYEN DUC , NGHIEP HOANG THI 
Published: December 2023

In the present study, the genus Arhaconotus is revised and keyed with three species of this genus from Vietnam were described and fully illustrated as new for science, viz. Arhaconotus belokobylskiji Long, sp. nov., A. hoabinhicus Long, sp. nov. and A. longicaudatus Long, sp. nov., and one species, A. hainanensis Tang & Chen, 2010 newly recorded for Vietnam’s braconid fauna. Up to know, a total of seven species of Arhaconotus are described, a key to all the already known Arhaconotus species is provided. Comparative morphological characters of Arhaconotus species were also discussed.
Transition in viscoelastic properties within successive annual rings of radiata pine (Pinus radiata)
Authors: Horiyama Hiroaki , Kojiro Keisuke , Furuta Yuzo 
Published: December 2023

AbstractDynamic mechanical analysis (DMA) measurements of water-saturated radiata pine wood in the temperature range from 0 ℃ to 100 ℃ were focused to clarify the transition in viscoelastic properties within successive annual rings. Four radially consecutive specimens were taken per annual ring and DMA measurements in the tangential direction were performed using these specimens. The following results were obtained. The peak of tanδ caused by micro-Brownian motion of lignin was observed in all samples. The temperature of peak tanδ tended to decrease from earlywood to latewood within an annual ring. The temperature of peak tanδ increased across annual ring boundary. The same trend was repeated within the next annual ring. It was found that the viscoelastic properties transitioned within successive annual rings.
A novel periodontal endoscopy-aided non-incisional periodontal regeneration technique in the treatment of intrabony defects: a retrospective cohort study
Authors: Shi Jiahong , Wang Jinmeng , Yang Zhiyu , Li Jingwen , Lei Lang , Li Houxuan 
Published: December 2023

Abstract
Background
Gingival recession and post-operation discomfort are still a problem for patients receiving the periodontal regeneration surgery for intra-bony defects. To further reduce the trauma and the post-operation gingival recession, a novel periodontal endoscopy-aided non-incisional regeneration technique (NIT) was proposed in the treatment of intra-bony defects.

Methods
Retrospective analysis of 21 subjects treated with NIT and 21 subjects with periodontal endoscopy-aided scaling and root planing (PSRP) at baseline and 1-year evaluation was conducted. After removing the subgingival calculus and granulation tissue, bone grafting materials were placed into intrabony defects with the assistance of a gingival retractor in the NIT group. Probing depth (PD), gingival recession (GR), clinical attachment level (CAL), as well as the distance between bone crest (BC) level and base of the defect (BD) (intrabony defect depth, IBD) were evaluated at baseline and 1 year after treatment.

Results
At 1-year follow-up, the value of CAL, PD and IBD were statistically significant different compared with baseline in both two groups (p<0.001). CAL gain (p = 0.012) and PD reduction (p = 0.004) was greater in the NIT than PSRP. However, no difference in the IBD reduction was found between the NIT group and PSRP. Better CAL gain and PD reduction was achieved in the 1-year term in the NIT when compared with PSRP.

Conclusion
NIT have resulted in significant gains in both clinical and radiographic parameters. NIT might be utilized as an alternative of the surgical treatment for periodontal intrabony defects.

Trial registration
This clinical trial registration was registered retrospectively (August 3, 2023) and the number is ChiCTR2300074317.
Tranexamic acid by the intramuscular or intravenous route for the prevention of postpartum haemorrhage in women at increased risk: a randomised placebo-controlled trial (I’M WOMAN)
Authors: Brenner Amy , Shakur-Still Haleema , Chaudhri Rizwana , Muganyizi Projestine , Olayemi Oladapo , Arribas Monica , Kayani Aasia , Javid Kiran , Bello Adenike , Roberts Ian ,   on behalf of the I’M WOMAN Trial Collaborative Group
Published: December 2023

Abstract
Background
Postpartum haemorrhage (PPH) causes about 70,000 maternal deaths every year. Tranexamic acid (TXA) is a life-saving treatment for women with PPH. Intravenous (IV) TXA reduces deaths due to PPH by one-third when given within 3 h of childbirth. Because TXA is more effective when given early and PPH usually occurs soon after childbirth, giving TXA just before childbirth might prevent PPH. Although several randomised trials have examined TXA for PPH prevention, the results are inconclusive. Because PPH only affects a small proportion of births, we need good evidence on the balance of benefits and harms before using TXA to prevent PPH. TXA is usually given by slow IV injection. However, recent research shows that TXA is well tolerated and rapidly absorbed after intramuscular (IM) injection, achieving therapeutic blood levels within minutes of injection.

Methods
The I’M WOMAN trial is an international, multicentre, three-arm, randomised, double-blind, placebo-controlled trial to assess the effects of IM and IV TXA for the prevention of PPH in women with one or more risk factors for PPH giving birth vaginally or by caesarean section.

Discussion
The trial will provide evidence of the benefits and harms of TXA for PPH prevention and the effects of the IM and IV routes of administration. The IM route should be as effective as the IV route for preventing bleeding. There may be fewer side effects with IM TXA because peak blood concentrations are lower than with the IV route. IM TXA also has practical advantages as it is quicker and simpler to administer. By avoiding the need for IV line insertion and a slow IV injection, IM administration would free up overstretched midwives and doctors to focus on looking after the mother and baby and expand access to timely TXA treatment.

Trial registration
ClinicalTrials.gov NCT05562609. Registered on 3 October 2022. ISRCTN Registry ISRCTN12590098. Registered on 20 January 2023. Pan African Clinical Trial Registry PACTR202305473136570. Registered on 18 May 2023.
Situs inversus with levocardia in a 15-year-old male adolescent: a case report
Authors: Mesfin Telila , Kedir Ibrahim , Tilahun Teketel , Seyoum Kenbon , Dadi Sisay , Ejigu Neway , Desta Fikreab , Geta Girma , Tsegaye Mesfin , Salih Husien 
Published: December 2023

Abstract
Background
Situs inversus with levocardia is a rare anomaly in which the heart is present in the left chest but the abdominal viscera are transposed. It is caused by a single incomplete penetration of an autosomal recessive gene. It is unclear what exactly causes situs inversus with levocardia. Even if situs inversus can be identified following a comprehensive physical examination, it is now possible to validate the results and search for further information and pathologies since medical imaging is so widely accessible.

Case
A 15-year-old Oromo male child from a remote area of Bale Zone presented to the Goba Referral Hospital’s medical emergency outpatient department complaining of periumbilical pain that had persisted for 4 months. He frequently came to our hospital and was admitted three times with the same problem. Objectively, there was tenderness over the left lower quadrant and periumbilical area. The sonographic evaluation discovered the transposition of the liver and spleen with cardiac apex on the left side. He received conservative treatment with ceftriaxone 1 g intravenous twice a day and metronidazole 500 mg intravenous for 5 days, and he went home improved.

Conclusion
Isolated levocardia is a rare form of situs inversus in which the heart is in the traditional levo position while the abdominal organs are in the dextro position. What causes situs inversus with levocardia is unknown. Despite the fact that situs inversus can be diagnosed after a thorough physical examination, medical imaging has allowed us to confirm the findings as well as understand more about diseases. Due to the severity of an underlying heart defect, situs inversus with levocardia has a dismal prognosis.
Modification of substrate specificity of l-arginine oxidase for detection of l-citrulline
Authors: Yamamoto Kei , Masakari Yosuke , Araki Yasuko , Ichiyanagi Atsushi , Ito Kotaro 
Published: December 2023

AbstractEnzymatic detection of citrulline, a potential biomarker for various diseases, is beneficial. However, determining citrulline levels requires expensive instrumental analyses and complicated colorimetric assays. Although l-amino acid oxidase/dehydrogenase is widely used to detect l-amino acids, an l-citrulline-specific oxidase/dehydrogenase has not been reported. Therefore, in this study, we aimed to develop an l-citrulline-specific enzyme by introducing a mutation into l-arginine oxidase (ArgOX) derived from Pseudomonas sp. TPU 7192 to provide a simple enzymatic l-citrulline detection system. The ratio of the oxidase activity against l-arginine to that against l-citrulline (Cit/Arg) was 1.2%, indicating that ArgOX could recognize l-citrulline as a substrate. In the dehydrogenase assay, the specific dehydrogenase activity towards l-arginine was considerably lower than the specific oxidase activity. However, the specific dehydrogenase activity towards l-citrulline was only slightly lower than the oxidase activity, resulting in improved substrate specificity with a Cit/Arg ratio of 49.5%. To enhance the substrate specificity of ArgOX, we performed site-directed mutagenesis using structure-based engineering. The 3D model structure indicated that E486 interacted with the l-arginine side chain. By introducing the E486 mutation, the specific dehydrogenase activity of ArgOX/E486Q for l-citrulline was 3.25 ± 0.50 U/mg, which was 3.8-fold higher than that of ArgOX. The Cit/Arg ratio of ArgOX/E486Q was 150%, which was higher than that of ArgOX. Using ArgOX/E486Q, linear relationships were observed within the range of 10–500 μM l-citrulline, demonstrating its suitability for detecting citrulline in human blood. Consequently, ArgOX/E486Q can be adapted as an enzymatic sensor in the dehydrogenase system.
Graphical Abstract