Miracle-dz/UniFAR-FTUs huggingface dataset:
Is there a black hole minimum mass

Applying the first and generalized second laws of thermodynamics for a realistic process of near critical black hole formation, we derive an entropy bound, which is identical to Bekenstein's one for radiation. Relying upon this bound, we derive an absolute minimum mass $\ensuremath{\sim}0.04\sqrt{{g}_{*}}{m}_{\mathrm{Pl}}$, where ${g}_{*}$ and ${m}_{\mathrm{Pl}}$ is the effective degrees of freedom for the initial temperature and the Planck mass, respectively. Since this minimum mass coincides with the lower bound on masses of which black holes can be regarded as classical against the Hawking evaporation, the thermodynamical argument will not prohibit the formation of the smallest classical black hole. For more general situations, we derive a minimum mass, which may depend on the initial value for entropy per particle. For primordial black holes, however, we show that this minimum mass can not be much greater than the Planck mass at any formation epoch of the Universe, as long as ${g}_{*}$ is within a reasonable range. We also derive a size-independent upper bound on the entropy density of a stiff fluid in terms of the energy density.
Anatomy and morphology character of five Indonesian banana cultivars ( Musa spp . ) of different ploidy level

Sumardi I, Wulandari M (2011) Anatomy and morphology character of five Indonesian banana cultivars (Musa spp.) of different ploidy level. Biodiversitas 12: 167-175. In Indonesia there are many cultivars of banana, and some of them produce edible fruits. Beside their morphology, the character which necessary as a tool for classification is anatomical character. The aim of this research were to describe the anatomical character and morphology of fives Indonesian banana cultivars based on their level of ploidy. The cultivars were collected from Banana Germplasm Plantation, Yogyakarta District, Indonesia. The samples of roots, rhizome, and leaf were collected from five banana cultivars i.e.: Musa acuminata cv Penjalin, M. balbisiana cv Kluthuk warangan, M. acuminata cv Ambon warangan, M. paradisiaca cv Raja nangka, and M. paradisiaca cv Kluthuk susu. For anatomy observation samples were prepared using paraffin method, stained with 1% safranin in 70% ethanol. To observe the structure of stomata and epidermis surface, slide were prepared using modification of whole mount method. Slides were observed using Olympus BHB microscope completed with Olympus camera BM10A. Stem and leaf morphology character of diploid level (AA and BB genome) is different with triploid level (AAA, AAB, and ABB genome). Anatomy and morphology character of root and rhizome of banana in diploid level (AA and BB genome) and triploid level (AAA, AAB, and ABB genome) is quite similar. Distribution of stomata is found in leaf and pseudostem. Stomata is found in adaxial and abaxial epidermis layer. The size of guard cells in triploid cultivars was longer than that diploid cultivars. The root composed of epidermis layer, cortex and cylinder vascular of five cultivar’s root show anomalous structure. Rhizome consist of peripheric and centre zone. Anatomically, this was no differences in the rhizome structure among five banana cultivars. The row of vascular bundles acts as demarcation area between peripheric and central zone. In the cultivar with BB genome (diploid) and ABB genome (triploid) the row of vascular bundle was not found. The differences of leaf anatomy were base on: size and number of stomata distribution, number of subsidiary cells, number of hypodermal layers, structure and number of parenchyma palisade, size of airspace in petiole and mesophyll and the vascular bundle structure.
Undiagnosed Ectopic Pregnancy: A Retrospective Analysis of 31 ‘Missed’ Ectopic Pregnancies at a Teaching Hospital

Summary: The management of 255 surgically proven cases of ectopic pregnancy, treated at a teaching hospital over a 5‐year period, was retrospectively reviewed to determine the proportion of cases where the diagnosis was ‘missed’ at initial presentation. Thirty‐one patients (12%) had presented and been discharged with an incorrect diagnosis, then subsequently readmitted for definitive treatment of a tubal ectopic pregnancy. In this group, the mean time from initial presentation to definitive surgery was 8 days. Ten of the 31 women with ‘missed’ ectopic pregnancies (32%) underwent salpingectomy, whereas the rate of salpingectomy in those women whose ectopic pregnancy was correctly diagnosed at first presentation was 19.5% (44 of 224). We conclude that delays in the diagnosis of ectopic pregnancy may be associated with an increased rate of salpingectomy, which may in turn reduce prospects for future fertility, a finding not previously canvassed in the literature. The factors contributing to misdiagnosis of ectopic pregnancy are discussed and compared with those reported in other studies.
The Periplasmic Flagellum of Spirochetes

Although spirochete periplasmic flagella have many features similar to typical bacterial flagella, they are unique in their structure and internal periplasmic location. This location provides advantages for pathogenic spirochetes to enter and to adapt in the appropriate host, and to penetrate through matrices that inhibit the motility of most other bacteria. These flagella are complex, and they dynamically interact with the spirochete cell cylinder in novel ways. Electron microscopy, tomography and three-dimensional reconstructions have provided new insights into flagellar structure and its relationship to the spirochetal cell cylinder. Recent advances in genetic methods have begun to shed light on the composition of the spirochete flagellum, and on the regulation of its synthesis. Because spirochetes have a high length to width ratio, their cells provide an opportunity to study two important features. These include the polarity or distribution of flagellar synthesis as well as the mechanisms required for coordination of the movement of the cell ends, to enable it to move in the forward or reverse direction.
Renal Outcome Following On- and Off-Pump Coronary Artery Bypass Graft Surgery

A prospective study was carried out to compare the outcomes of patients with preexisting non-dialysis-dependent renal dysfunction who underwent coronary artery bypass grafting with or without cardiopulmonary bypass. Elective off-pump coronary artery bypass was performed in 29 patients with renal dysfunction. Their results were compared with those of a similar group of 35 patients who underwent the conventional on-pump coronary artery grafting. There was a significant deterioration in creatinine clearance in the on-pump group on days 1, 2, and 4 after surgery, while creatinine clearance in the off-pump group remained close to the baseline level. Both groups had improved to the preoperative creatinine clearance values on follow-up at 4 weeks. It was concluded that off-pump surgery provided better renal protection than the conventional on-pump technique in patients with preexisting non-dialysis-dependent renal dysfunction.
Gestational Diabetes Mellitus in HIV-Infected and -Uninfected Pregnant Women in Cameroon

Gestational diabetes mellitus (GDM) in both HIV-infected and -uninfected women has been poorly studied in Africa. We enrolled pregnant women ages 15–50 years at a large semiurban clinic in Cameroon. A 75-g oral glucose tolerance test (OGTT) was performed at 24–28 weeks' gestational age or at the earliest prenatal visit for those presenting after 28 weeks. Women were diagnosed with GDM according to American Diabetes Association criteria (1). Data on height, blood pressure, sociodemographics, obstetrical history, prepregnancy weight, HIV clinical status, combination antiretroviral therapy (cART) history, and pregnancy outcomes were collected. Exact logistic regression models were used to identify predictors of GDM. Of 316 participants, 20 (63%) had GDM, and 3 had overt diabetes (DM). Women with GDM presented for OGTT later than those without (29 vs. 27 weeks, P = 0.04) (Table 1). After adjustment for age, gestational age at the time of OGTT, family history of DM, HIV, …
Efficacy of the revised Vienna Classification for diagnosing colorectal epithelial neoplasias.

AIM To prospectively investigate the efficacy of the revised Vienna Classification for diagnosing colorectal epithelial neoplastic lesions in cold biopsy specimens. METHODS Patients were selected for inclusion if they had colorectal epithelial lesions that were not considered suitable for direct endoscopic resection. These included colorectal polyps > or = 10 mm and lesions suspected of being carcinomas capable of invading the colorectal submucosa or beyond, including strictures, based on the cold biopsies obtained from each lesion prior to resection. We investigated the relationship between diagnoses based on cold biopsy samples using the revised Vienna Classification and resected specimens of the same lesions, and the therapeutic implications of diagnoses made using the revised Vienna Classification. The same cold biopsy specimens were also examined using the Japanese Group Classification guidelines, and compared with the resected specimens of the same lesions for reference. RESULTS A total of 179 lesions were identified. The sensitivity, specificity, positive and negative predictive values of the revised Vienna Classification for distinguishing between intramucosal lesions and submucosal invasive carcinomas in cold biopsy specimens was 22.2%, 100%, 100%, and 71.4%, respectively, and for distinguishing between intramucosal lesions and those invading the submucosa or beyond was 59.7%, 100%, 100%, and 37.6%, respectively. The sensitivity, specificity, positive and negative predictive values of the Japanese Group Classification for distinguishing between intramucosal lesions and submucosal invasive carcinomas in cold biopsy specimens was 83.3%, 91.4%, 83.3%, and 91.4%, respectively, and for distinguishing between intramucosal lesions and those invading the submucosa or beyond was 95.1%, 91.4%, 97.9%, and 82.1%, respectively. A total of 137 of 144 carcinomas that had invaded the submucosa or beyond and three high-grade intraepithelial neoplasias were diagnosed as "carcinoma" using the Japanese Group Classification system. CONCLUSION The revised Vienna Classification for cold biopsy specimens has high positive predictive value in the diagnosis of colorectal carcinoma invasive to the submucosa or beyond.
The effect of lensing on the large-scale cosmic microwave background anisotropy

We first compare the cosmic microwave background (CMB) lensing model of Seljak with the empirical model of Lieu & Mittaz to determine if the latter approach implies a larger effect on the CMB power spectrum. We find that the empirical model gives significantly higher results for the magnification dispersion, σ , at small scales ( θ< 30 arcmin) than that of Seljak, assuming standard cosmological parameters. However, when the empirical foreground model of Lieu & Mittaz is modelled via correlation functions and used in the Seljak formalism, the agreement is considerably improved at small scales. Thus we conclude that the main difference between these results may be in the different assumed foreground mass distributions. We then show that a foreground mass clustering with ξ (r) ∝ r −3 gives an rms lensing magnification which is approximately constant with angle, θ. In Seljak’s formalism, we show this can lead to a smoothing of the CMB power spectrum which is proportional to e −σ 2 l 2 /2 and which may be able to move the first CMB acoustic peak to smaller l, if the mass clustering amplitude is high enough. Evidence for a high amplitude of mass clustering comes from the quasi-stellar object magnification results of Myers et al. who suggest that foreground galaxy groups may
Risk factors for leg wound complications following endoscopic versus traditional saphenous vein harvesting.

BACKGROUND Risk factors for leg wound complications following traditional saphenectomy have included: obesity, diabetes, female gender, anemia, age, and peripheral vascular disease. Use of an endoscopic saphenectomy technique may modify the risk factor profile associated with a traditional longitudinal incision. METHODS From September 1996 to May 1999, 276 consecutive patients who underwent elective isolated coronary artery bypass grafting performed by a single surgeon (K.B.A.) had their greater saphenous vein harvested endoscopically. During the period from January 1999 to May 1999, the surgical records of 643 patients who underwent the same operation and had a traditional longitudinal saphenectomy were reviewed for postoperative leg wound complications. Group demographics were similar regarding preoperative risk stratification and traditionally identified wound complication risk factors (diabetes, gender, obesity, preoperative anemia, and peripheral vascular disease). Leg wound complications were defined as: hematoma, dehiscence, cellulitis, necrosis, or abscess requiring dressing changes, antibiotics and/or debridement prior to complete epithelialization. Follow-up was 100% at six weeks. RESULTS Leg wound complications following endoscopic harvest occurred in 3% (9/276) of patients versus 17% (110/643) of traditional harvest patients (p < 0.0001). No univariate risk factors for wound complications were associated with endoscopic saphenectomy. Univariate predictors of wound complications following traditional saphenectomy included: diabetes (p = 0.001), obesity (p = 0.0005), and female gender (p = 0.005). Multivariable risk factors for leg wound complications following saphenectomy were traditional harvest technique (OR 7.56, CI 3.8-17.2, p < 0.0001), diabetes (OR 2.10, CI 1.4-3.2, p = 0.0006) and obesity (OR 1.82, CI 1.2-2.8, p = 0.007). CONCLUSIONS Traditional longitudinal saphenectomy is a multivariable risk factor for development of leg wound complications. Endoscopic saphenectomy modifies the risk factor profile for wound complications and should be the standard of care, particularly for obese and/or diabetic patients who require venous conduit during coronary artery bypass grafting.
Subjective and Objective Outcome After Revision Arthroscopic Stabilization for Recurrent Anterior Instability Versus Initial Shoulder Stabilization

Background: The value of arthroscopic revision shoulder stabilization after failed instability repair is still a matter of debate. Hypothesis: Arthroscopic revision shoulder stabilization using suture anchors provides equivalent subjective and objective results compared with initial arthroscopic instability repair. Study Design: Cohort study; Level of evidence, 3. Methods: Twenty consecutive patients who underwent arthroscopic revision shoulder stabilization using suture anchors (group 2) were matched for age, gender, and handedness (dominant or nondominant) with 20 patients who had initial arthroscopic instability repair using the same technique (group 1). At the time of follow-up, a complete physical examination of both shoulders and evaluation with the Rowe score, Walch-Duplay score, Melbourne Instability Shoulder Score, Western Ontario Shoulder Instability Index, and the Subjective Shoulder Value were performed. In addition, standard radiographs (true AP and axillary views) were taken to evaluate signs of osteoarthritis. Results: After a minimum follow-up of 24 months, no recurrent dislocations were observed in either group. The apprehension sign was positive in 2 cases of revision surgery (0 vs 2; P > .05). No significant differences in the Rowe score (89 vs 81.8 points) were found between groups 1 and 2 (P > .05). However, group 2 revealed significantly lower scores in the Walch-Duplay score (85.3 vs 75.5 points), Melbourne Instability Shoulder Score (90.2 vs 73.7 points), Western Ontario Shoulder Instability Index (89.8% vs 68.9%), and Subjective Shoulder Value (91.8% vs 69.2%) (P < .05). Signs of instability arthropathy were found more often in patients with arthroscopic revision surgery (2 vs 5; P > .05). Conclusion: Arthroscopic revision shoulder stabilization is associated with a lower subjective outcome compared with initial arthroscopic stabilization. The objective results found in this study may overestimate the clinical outcome in this patient population.
Psychiatric Comorbidities and Environmental Triggers in Patients with Chronic Daily Headache: A Lifestyle Study

Objective: Patients with chronic daily headache (CDH) suffer from several significant psychiatric comorbidities and have unhealthy lifestyle. We aimed at studying psychiatric comorbidities, environmental triggers, lifestyle factors, and intensity of CDH in patients referred by the department of neurology from 2011 to 2014. Method: Through medical and psychiatric interviews and using 0 to 10 visual analogue scale (VAS), we assessed patients with CDH, using a checklist, to elicit psychiatric comorbidities, intensity of CDH, environmental factors, and lifestyle derangement. Results: We interviewed 413 (age 16-80 years, mean 40 +/- 14.0) out of 548 patients; 312 (75.5%) were married, and 282 (68.1%) were female. Environmental triggers (374, 90.6%) were the most common cause of CDH, while 214 (51.8%) had no compliance to recommended nutrition. Exercise avoidance (201, 48.7%) was the less prevalent lifestyle factor. Of the patients, 372 (90.1%) were stressed and 162 (39.2%) had obsessive-compulsive disorder (OCD), which were the most and less prevalent psychiatric comorbidities, respectively. Intensity of pain was moderate to severe (mean score = 7.1+/- 1.9), while females reported higher VAS scores (p<0.02). Patients with previous history of psychotherapy reported higher score of VAS (p<0.001). Those patients living with a person suffering from head pain reported more VAS score (p<0.003). Conclusion: Notable psychiatric comorbidities were found in patients with CDH, many of which are modifiable such as environmental triggers and unhealthy lifestyle. In heavily populated cities, these factors may double the burden of the CDH by precipitating new or exacerbating previous psychiatric comorbidities. We, thus, suggest conducting more studies on this subject.
Improved Study of Temperature Dependence Equivalent Circuit Model for Supercapacitors

The supercapacitor, because of its advantages of high specific power, quick charging or discharging with high current rates, and long cycle life, is an interesting choice for energy storage for applications where high power is needed for only a few seconds, such as pulse-power supply systems. Based on the use of supercapacitors all around the world, more and more attention is focused on the effects of temperature on their performance metrics such as capacitance, internal resistance, and efficiency. To predict the terminal voltage of supercapacitors at different temperatures, a three-branch RC equivalent circuit model is improved in this paper, and it can predict the terminal voltage up to 5 to 10 min after completion of charging or discharging. Initially, a typical three-branch RC equivalent circuit model without temperature parameter is used to simulate the pulse charging and discharging behavior of a specific commercial supercapacitor. Next, with the pulse charging and discharging experiment results under -40°C, -20°C, 0°C, and 20°C, all parameters in the circuit model are reset to a function of temperature, and the temperature dependence of parameters is discussed in detail and determined numerically. Finally, for the purpose of validating the correctness and the accuracy of the improved model, compared study of simulation results and experiment curves is done. Comparison results show that the fitting accuracy of the improved equivalent circuit model is satisfied in pulse charging and discharging at different temperature.
Impact of prenatal diagnosis of transposition of the great arteries on postnatal outcome

Abstract Objective: To assess the impact of prenatal diagnosis of transposition of the great arteries (TGA) on postnatal outcome. Methods: Hundred and fifty-four patients with either simple (n = 101) or complex forms (n = 53) of TGA, diagnosed prenatally (G1, n = 88) or postnatally (G2, n = 66), who were admitted and underwent surgical correction in our centre between 1998 and 2014, were analysed. Results: Prostaglandin E1 (PgE1) infusion and balloon atrial septostomy (BAS) were performed in the first 48 h after birth more commonly in G1. The hospital mortality rate for the whole group was 7.1%, higher for complex forms (13.2%) than for simple TGA (3.9%), (p = 0.034). The overall mortality rate was similar in G1 and G2. The mortality for simple TGA was higher when PgE1 infusion and BAS were implemented after the first 48 h (p = 0.001). All deaths in G2 occurred in patients first receiving PgE1 and BAS beyond 48 h. PgE1 was initiated in the first 48 h in most patients (83%) with simple TGA postnatally diagnosed. Conclusions: Adequate measures in the first 48 h after birth are essential to reduce the early mortality in TGA, especially in the simple form. This can be provided by prenatal diagnosis or by early neonatal clinical suspicion and prompt measures.
Energy-efficient power control for MIMO channels with partial and full CSI

In a multiple-input-multiple-output (MIMO) down-link channel, the impact of line-of-sight, out-of-cell interferers and of antenna correlation on the energy efficiency (EE) of the communication is discussed. With reference to a power budget model reflecting the power expenditure of a base station (BS) together with the power employed for training, we provide analytical insights for power control policies either designed in the presence of full channel state information (CSI) availability at the transmitter or under the assumption that power allocation does not adapt to channel state dynamically.
Boundary crossing probabilities for stationary Gaussian processes and Brownian motion

Let X(t) be a stationary Gaussian process, /(/) a continuous function, and T a finite or infinite interval. This paper develops asymptotic estimates for P(X(t) > fit), some /er) when this probability is small. After transformation to an Ornstein Uhlenbeck process the results are also applicable to Brownian motion. In that special case, if W(t) is Brownian motion, / is continuously differentiable, and T = [0, T] our estimate for P( W(t) > fit), some / e T) is A = jrr(20-,(/(0/',/2)f(/(0/'1/2) is the standard normal density and * is its upper tail distribution. Our approach is to find an approximate first passage density and then compute crossing probabilities as a one-dimensional integral. In the case of boundaries without cusps, our results unify and extend separate results for crossings of constant levels developed by Pickands, and Quails-Watanabe, and crossings of rapidly increasing barriers studied by Berman. Applications are also briefly explored.
The Effects of Subway Expansion on Traffic Conditions: Evidence from Beijing

This report looks at the effects of new subway line construction on Beijing traffic from 2009 to 2013. The authors use a regression discontinuity design to estimate the impact of subway openings based on daily passenger ridership information and daily congestion index data. It is determined that the opening of a new subway line resulted in a decline in daily bus ridership by 452,400, while subway passenger ridership rose by 246,300. Traffic congestion in Beijing, however, was not effected. Recommendations, such as increased parking fees, are provided to encourage commuters to give up driving and commute by subway.