bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evolution Law of Gas Discharge of Carbon Monoxide in Mining Extra-Thick Coal Seam of Datong Mining Area
Authors: Ma Zhanyuan , Du Feng 
Published: August 2021

In order to reveal the evolution law of gas discharge of carbon monoxide in mining an extra-thick coal seam of the Datong mining area by the numerical simulation and field monitoring test, the 8202 working face and 8309 working face in the Tongxin coal mine are chosen as the test sites. The results show that the seepage flow of carbon monoxide gas reaches

1.854
×

10

−
8

m

3

/
s

in the #1 fracture after the #3 key stratum in the far field breaks in the 8202 working face, the seepage flow of carbon monoxide gas reaches

1.307
×

10

−
7

m

3

/
s

in the #2 fracture, the seepage flow of carbon monoxide gas reaches

4.276
×

10

−
7

m

3

/
s

in the #3 fracture, the seepage flow of carbon monoxide gas reaches

4.192
×

10

−
7

m

3

/
s

in the #4 fracture, and the seepage flow of carbon monoxide gas reaches

1.623
×

10

−
7

m

3

/
s

in the #5 fracture. The initial caving of the #3 key stratum in the far field occurs and collapses to the gob, when the working face in the #3-5 coal seam advances to 180 m, and the voussoir beam forms in the #3 key stratum. Besides, a shower shape was formed by the seepage flow of carbon monoxide gas, and the maximum flow in the working face reaches

4.562
×

10

−
4

m

3

/
s

. When the 8309 working face advances from 521.2 m to 556.4 m, the air pressure at the working face gradually rises and reaches the maximum magnitude and then begins to decrease; when the working face advances to 556.4 m, the air pressure at the working face reaches the maximum magnitude of 91.35 kPa. The gas discharge disaster of carbon monoxide in mining the extra-thick coal seam of the Datong mining area is effectively controlled by the dynamic balance multipoint control technology. The research results can be treated as an important theoretical basis for the prevention and treatment for carbon monoxide discharge disaster in mining the extra-thick coal seam of the Datong mining area.
Entre visada e apreensão: questões sobre corpo e discurso na obra de Jacques Fontanille
Authors: Gomes Junior Edison 
Published: August 2021

A obra teórica de Jacques Fontanille é marcada por temas que interessam ao campo da semiótica e ainda não foram totalmente resolvidos, tais como a questão do sensível, da percepção e do corpo no enunciado, que são objetos cada vez mais abordados pelos semioticistas da escola francesa. Focalizando a questão do discurso na semiótica, Fontanille procura estabelecer um diálogo entre o inteligível e o sensível, de modo a tentar compreender como a instância do discurso projeta um corpo através da enunciação e como essa projeção pode ser percebida no enunciado, de modo que a língua estabelece diversas formas de ancoragem da “carne falante”. O corpo sensível fornece ao seu corpo inteligível a percepção de equilíbrios e desequilíbrios, continuidades e descontinuidades, euforias e disforias, que partem de categorias tímicas de se amalgamar ao mundo, e se projetar nele, buscando uma solução entre a aparência e o aparecer dos fenômenos. As sensações, sempre fugidias, são armadas pela linguagem em diferentes sentidos. A instância do discurso, ao representar o real através da linguagem, cria efeitos que são resolvidos por sensibilidades e inteligibilidades, elos sensíveis e inteligíveis, visadas e apreensões de uma instância enunciativa corporal. Nesse artigo, pretende-se fazer um pequeno resumo sobre a relação entre corpo, enunciação e sentido, levando em conta algumas das discussões propostas por Jacques Fontanille, tais como propriocepção, tomada de posição, ponto de vista, campo posicional, actantes, práxis enunciativa e forma de vida.
Análise semiótica morfodinâmica da “glocalização” urbana
Authors: Marcos Isabel 
Published: August 2021

Este artigo visa apresentar a pesquisa que temos vindo a desenvolver há alguns anos. A perspetiva da análise é a da semiótica morfodinâmica, sendo o nosso objeto de estudo o desenvolvimento da mundialização e o seu impacto nos fenómenos urbanos. Esta reflexão iniciou-se com o estudo das quatro mundializações: terrestre, marítima, aérea e virtual. No decorrer do presente artigo, mostraremos, no espaço da cúspide, de que forma a cidade na sua dimensão local (Fl – Forças locais) e simultaneamente global (Fg – Forças globais) (Cf. Figura 1 – espaço interno (x,y) da cúspide) se estrutura ao ritmo progressivo de cada inovação tecnológica (possibilitando novas condições de significação) e nos confronta com novos sistemas de produção de espaço2 (b) e tempo3 (a) (Cf. Figura 2 – Espaço externo (a,b) da cúspide, desdobramento da morfogénese da glocalização | no lado esquerdo da figura 2, de baixo para cima, integrei os diversos estados internos da cúspide, representando o espaço que se retrai cada vez mais e o tempo se vai reduzindo ao instante). A cidade mundializada obriga-nos a repensar o conceito de cidade e a propor um paradigma diferente para o seu futuro. O processo tecnológico abriu um “mundo dentro do mundo”, isto é, súbita e repentinamente, o “instrumento tecnocientífico” tornou-se um “mundo virtual” na Web, provocando uma duplicação da nossa noção de espaço. Assim, o sujeito deixa de se representar apenas no espaço concreto do território (local), surgindo, igualmente, no espaço interativo da comunicação (global). O mundo virtual torna visível um determinado mundo da comunicação, que se expressa concretamente no espaço das nossas cidades, formando progressivamente aquilo que denominamos “território glocal”. Para comprovar este modelo, mostraremos algumas consequências deste mundo virtual no espaço concreto das cidades, através do exemplo da obra Harvard Project on the City de Rem Koolhaas.
Increased Inpatient Mortality for Cardiovascular Patients During the First Wave of the COVID‐19 Epidemic in New York
Authors: Mountantonakis Stavros E. , Makker Parth , Saleh Moussa , Coleman Kristie M. , Husk Gregg , Jauhar Rajiv , Singh Varinder , Epstein Laurence M. , Kuvin Jeffrey 
Published: August 2021

Background
The acuity and magnitude of the first wave of the COVID‐19 epidemic in New York mandated a drastic change in healthcare access and delivery of care.

Methods and Results

We retrospectively studied patients admitted with an acute cardiovascular syndrome as their principal diagnosis to 13 hospitals across Northwell Health during March 11 through May 26, 2020 (first COVID‐19 epidemic wave) and the same period in 2019. Three thousand sixteen patients (242 COVID‐19 positive) were admitted for an acute cardiovascular syndrome during the first COVID‐19 wave compared with 9422 patients 1 year prior (decrease of 68.0%,
P
<0.001). During this time, patients with cardiovascular disease presented later to the hospital (360 versus 120 minutes for acute myocardial infarction), underwent fewer procedures (34.6% versus 45.6%,
P
<0.001), were less likely to be treated in an intensive care unit setting (8.7% versus 10.8%,
P
<0.001), and had a longer hospital stay (2.91 [1.71–6.05] versus 2.87 [1.82–4.95] days,
P
=0.033). Inpatient cardiovascular mortality during the first epidemic outbreak increased by 111.1% (3.8 versus 1.8,
P
<0.001) and was not related to COVID‐19‐related admissions, all cause in‐hospital mortality, or incidence of out‐of‐hospital cardiac deaths in New York. Admission during the first COVID‐19 surge along with age and positive COVID‐19 test independently predicted mortality for cardiovascular admissions (odds ratios, 1.30, 1.05, and 5.09, respectively,
P
<0.0001).

Conclusions
A lower rate and later presentation of patients with cardiovascular pathology, coupled with deviation from common clinical practice mandated by the first wave of the COVID‐19 pandemic, might have accounted for higher in‐hospital cardiovascular mortality during that period.
Evaluation and Comparison of Two Deep Convection Parameterization Schemes at Convection-Permitting Resolution
Authors: Zhang Xu , Bao Jian-Wen , Chen Baode , Huang Wei 
Published: August 2021

AbstractCoarse-grained results from a large-eddy simulation (LES) using the Weather Research and Forecasting (WRF) Model were compared in this study with the WRF simulations at a typical convection-permitting horizontal grid spacing of 3 km for an idealized case of deep moist convection. The purpose of this comparison is to identify major differences at the subgrid process level between two widely used deep convection parameterization schemes in the WRF Model. It is shown that there are considerable differences in subgrid process representations between the two schemes due to different parameterization formulations and underlying assumptions. The two schemes not only differ in trigger function, subgrid cloud model, and closure assumptions but also disagree with the coarse-grained LES results in terms of vertical mass flux profiles. Thus, it is difficult to discern which scheme is more advantageous over the other at the subgrid process level. The conclusions from this study highlight the importance of establishing benchmarks using observations and LES to develop and evaluate convection parameterization schemes suitable for models at convection-permitting resolution.
The Surgical Apgar Score Predicts Postoperative Complications in Elderly Patients After Surgery for Colorectal Cancer
Authors: Sugimoto Atsushi , Fukuoka Tatsunari , Nagahara Hisashi , Shibutani Masatsune , Iseki Yasuhito , Wang En , Okazaki Yuki , Tachimori Akiko , Maeda Kiyoshi , Ohira Masaichi 
Published: August 2021

Objective The surgical Apgar score (SAS) has been validated as a risk assessment tool for postoperative complications. However, the utility of the SAS in elderly patients with colorectal cancer remains unclear. In this study, we evaluated the utility of the SAS for predicting the severe complications in elderly patients with colorectal cancer. Methods We retrospectively analyzed 295 patients underwent radical surgery for colorectal cancer in elderly patients ≥75 years old. The SAS was calculated based on 3 intraoperative parameters: estimated blood loss (EBL), lowest mean arterial pressure, and lowest heart rate. Severe complications were defined as Clavien-Dindo classification grade ≥ IIIa. We divided all patients into 2 groups according to with or without severe complications. The optimal cut-off value of SAS for severe complications has been determined by receiver operator characteristic curve. Predictors for severe complications were analyzed by logistic regression modeling. Results Severe complications were observed in 57 patients (19.3%). Male, rectal cancer, operation time (>240 minutes), EBL (≥120 mL), and a low SAS (≤6) were significantly associated with severe complications in univariate analysis. A multivariate analysis revealed that male, rectal cancer, and a low SAS (≤6) were independent predictors for severe complications. Conclusions A low SAS (≤6) was associated with severe complications after colorectal cancer surgery in elderly patients. The SAS is a valuable predictor for severe complications in elderly patients with colorectal cancer.
Ketamine treatment for depression: A model of care
Authors: Bayes Adam , Dong Vanessa , Martin Donel , Alonzo Angelo , Kabourakis Michael , Loo Colleen 
Published: August 2021

Objective: Ketamine and related compounds are emerging as rapidly acting therapies for treatment-resistant depression. Ketamine differs from standard antidepressants in its speed of action, specific acute and cumulative side effects, risk of dependence and regulatory requirements. However, there is currently little guidance offering translation from research studies into clinical practice. We therefore detail a comprehensive model of care for ketamine treatment of depression. Method: We formulated a set of policies and procedures for a ‘compassionate use’ ketamine programme that developed out of our clinical research in ketamine. These policies and procedures were formulated into a detailed model of care. Results: The current Australian and New Zealand regulatory frameworks and professional bodies’ recommendations regarding ketamine are detailed along with clinical governance and infrastructure considerations. We next describe a four-step model comprising initial assessment, pre-treatment, treatment and post-treatment phases. The model comprises thorough psychiatric and medical assessments examining patient suitability, a rigorous consenting process and structured safety monitoring across an acute treatment course or maintenance therapy. Our ketamine dose-titration method is detailed allowing flexible dosing of patients across a treatment course enabling individualised treatment. Conclusion: The model of care aims to bridge the gap between efficacy studies and clinical care outside of research settings as ketamine and related compounds become increasingly important therapies for treatment-resistant depression.
A Multicenter Randomized Controlled Trial Comparing Single-Row With Double-Row Fixation in Arthroscopic Rotator Cuff Repair: Long-Term Follow-up
Authors: Lapner Peter , Li Ang , Pollock J. W. , Zhang Tinghua , McIlquham Katie , McRae Sheila , MacDonald Peter 
Published: August 2021

Background: The long-term outcomes of single- versus double-row fixation in arthroscopic rotator cuff repair are not currently known. Purpose: To compare the treatment effects of the single- versus double-row suture technique in arthroscopic rotator cuff repair of full-thickness tears at 10-year follow-up. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: Patients were evaluated at 10 years postoperatively. The primary outcome measure was the Western Ontario Rotator Cuff Index (WORC). Secondary outcome measures included the American Shoulder and Elbow Surgeons (ASES) score, Constant score, strength, and incidence of revision surgery. Ultrasound was used to evaluate the rotator cuff to determine repair integrity. Statistical analyses consistent with those of the main trial were conducted. Results: Of the original 90 participants, 77 (85%) returned at a mean follow-up of 10 years. At ten year follow-up, the WORC score was higher in the double row group (79.9 [95% CI, 16.2 to 99.1]) compared with the single row group (72.9, [95% CI, 4.3 to 100]), P = .020. From baseline to 2 years, the mean change in WORC scores for the single-row group was –48.5 compared with −40.6 for the double-row group, with a between-group difference of −7.8 (95% CI, −20.4 to 4.7). From 2 to 10 years, the change in WORC scores for the single-row group was 11.5 compared with −0.2 for the double-row group, with a between-group difference of 11.7 (95% CI, −0.7 to 24.3). From baseline to 10 years, the mean between-group difference was 3.9 (95% CI, −7.8 to 15.6). Similarly, a decrease in ASES scores was observed between 2 and 10 years for the single-row group (9.2 [95% CI, 0.9 to 17.5]; P = .029), with a nonsignificant decrease in ASES scores for the double-row group (6.2 [95% CI, −3.2 to 15.6]; P = .195) as well as a decrease in Constant scores for both the single- (9.5 [95% CI, 1.4 to 17.5]; P = .020) and double-row (14.4 [95% CI, 5.6 to 23.3]; P = .001) groups. Overall, 3 participants developed a full-thickness tear after 2 years: 2 from the double-row group and 1 from the single-row group. One participant from each study group underwent revision surgery after the 2-year time point. Conclusion: A statistically significant (but likely not clinically important) difference in WORC scores was seen at 10-year follow-up in favor of double-row fixation. Between baseline and 10-year follow-up, a decrease in most outcome scores was observed in both the single- and the double-row groups. Registration: NCT00508183 ( ClinicalTrials.gov identifier).
Colony Forming Potential and Protein Composition of Commercial Umbilical Cord Allograft Products in Comparison With Autologous Orthobiologics
Authors: Berger Dustin R. , Centeno Christopher J. , Kisiday John D. , McIlwraith C. Wayne , Steinmetz Neven J. 
Published: August 2021

Background: Umbilical cord (UC) connective tissues contain plastic-adherent, colony forming unit–fibroblasts (CFU-Fs) amenable to culture expansion for potential therapeutic use. Recently, UC-derived allograft products have been made available to practitioners in orthopaedics and other specialties, by companies purporting “stem cell”–based healing. However, such marketing claims conflict with existing regulations for these human tissues, generating questions over the cellular and protein composition of current commercially available UC allograft products. Purpose: To evaluate commercial UC allograft products for viable cells, CFU-Fs, and protein makeup. Study Design: Descriptive laboratory study. Methods: Five commercial UC allograft products claiming to contain viable, undescribed “stem cells,” 2 obtained from UC blood (UCB) and 3 from UC tissue (UCT), were analyzed. Image-based methods were used to measure cell concentration and viability, a traditional CFU-F assay was used to evaluate in vitro behavior indicative of a connective tissue progenitor cell phenotype often referred to as mesenchymal stem/stromal cells, and quantitative immunoassay arrays were used to measure a combination of cytokines and growth factors. Bone marrow concentrate (BMC) and plasma derived from the blood and bone marrow of middle-aged individuals served as comparative controls for cell culture and protein analyses, respectively. Results: Viable cells were identified within all 5 UC allograft products, with those derived from UCB having greater percentages of living cells (40%-59%) than those from UCT (1%-22%). Compared with autologous BMC (>95% viability and >300 million living cells), no CFU-Fs were observed within any UC allograft product (<15 million living cells). Moreover, a substantial number of proteins, particularly those within UCB allograft products, were undetectable or present at lower concentrations compared with blood and bone marrow plasma controls. Interestingly, several important growth factors and cytokines, including basic fibroblast growth factor, hepatocyte growth factor, interleukin-1 receptor antagonist, and osteoprotegerin, were most prevalent in 1 or more UCT allograft products as compared with blood and bone marrow plasma. Conclusion: CFU-Fs, often referred to as stem cells, were not found within any of the commercial UC allograft products analyzed, and clinicians should remain wary of marketing claims stating otherwise. Clinical Relevance: Any therapeutic benefit of current UC allograft products in orthopaedic medicine is more likely to be attributed to their protein composition (UCT > UCB) or inclusion of cells without colony forming potential (UCB > UCT).
Detection of Lateral Hinge Fractures After Medial Closing Wedge Distal Femoral Osteotomy: Computed Tomography Versus Plain Radiography
Authors: Nha Kyung Wook , Kim Kun Woo , Bae Ji Hoon , Jang Ki-Mo , Kim Sang-Gyun 
Published: August 2021

Background: Limited evidence exists in the literature regarding the detection rates of lateral hinge fracture (LHF) on computed tomography (CT) after medial closing wedge distal femoral osteotomy (MCDFO). Moreover, the effect of LHF on bone healing after MCDFO remains unclear. Hypothesis: The detection rates of LHF after MCDFO would be higher on CT than on plain radiography. The incidence of problematic bone healing would be higher in the knees with LHF than in those without LHF. Study Design: Cohort study (diagnosis), Level of evidence, 3. Methods: Patients who underwent MCDFO between May 2009 and July 2019 were retrospectively evaluated. The presence of LHF was evaluated using immediate postoperative plain radiography and CT. The detection rates of LHF on plain radiography and CT were compared. The incidence of problematic bone healing (nonunion, delayed union, and loss of correction) was also compared between the knees with LHF and those without LHF. Results: A total of 55 knees of 43 patients (mean age, 37.7 ± 16.7 years) were included in the study. Although 33 LHFs were detected on CT, only 19 LHFs were detected on plain radiography. The detection rate of LHF was significantly higher on CT than on plain radiography (60% vs 34.5%; P = .008). At 1-year follow-up, 10 cases of problematic bone healing (1 nonunion, 4 delayed unions, and 5 losses of correction) were identified. The incidence of problematic bone healing was significantly higher in the knees with LHF than in those without LHF as shown on plain radiography (36.8% vs 8.3%; P = .001) and CT (30.3% vs 0%; P = .004). Conclusion: LHF can be detected better on CT than on plain radiography and has a negative effect on bone healing after MCDFO. For patients with LHF detected on either plain radiography or CT, careful rehabilitation with close follow-up is recommended.
A “Comma Sign”–Directed Subscapularis Repair in Anterosuperior Rotator Cuff Tears Yields Biomechanical Advantages in a Cadaveric Model
Authors: Hackl Michael , Buess Eduard , Kammerlohr Sandra , Nacov Julia , Staat Manfred , Leschinger Tim , Müller Lars P. , Wegmann Kilian 
Published: August 2021

Background: Additional stabilization of the “comma sign” in anterosuperior rotator cuff repair has been proposed to provide biomechanical benefits regarding stability of the repair. Purpose: This in vitro investigation aimed to investigate the influence of a comma sign–directed reconstruction technique for anterosuperior rotator cuff tears on the primary stability of the subscapularis tendon repair. Study Design: Controlled laboratory study. Methods: A total of 18 fresh-frozen cadaveric shoulders were used in this study. Anterosuperior rotator cuff tears (complete full-thickness tear of the supraspinatus and subscapularis tendons) were created, and supraspinatus repair was performed with a standard suture bridge technique. The subscapularis was repaired with either a (1) single-row or (2) comma sign technique. A high-resolution 3D camera system was used to analyze 3-mm and 5-mm gap formation at the subscapularis tendon-bone interface upon incremental cyclic loading. Moreover, the ultimate failure load of the repair was recorded. A Mann-Whitney test was used to assess significant differences between the 2 groups. Results: The comma sign repair withstood significantly more loading cycles than the single-row repair until 3-mm and 5-mm gap formation occurred ( P≤ .047). The ultimate failure load did not reveal any significant differences when the 2 techniques were compared ( P = .596). Conclusion: The results of this study show that additional stabilization of the comma sign enhanced the primary stability of subscapularis tendon repair in anterosuperior rotator cuff tears. Although this stabilization did not seem to influence the ultimate failure load, it effectively decreased the micromotion at the tendon-bone interface during cyclic loading. Clinical Relevance: The proposed technique for stabilization of the comma sign has shown superior biomechanical properties in comparison with a single-row repair and might thus improve tendon healing. Further clinical research will be necessary to determine its influence on the functional outcome.