bluuebunny/crossref_metadata_2025_split huggingface dataset:
High-precision radiocarbon dating of political collapse and dynastic origins at the Maya site of Ceibal, Guatemala
Authors: Inomata Takeshi , Triadan Daniela , MacLellan Jessica , Burham Melissa , Aoyama Kazuo , Palomo Juan Manuel , Yonenobu Hitoshi , Pinzón Flory , Nasu Hiroo 
Published: January 2017

Significance
Tracing political change through refined chronologies is a critical step for the study of social dynamics. Whereas coarse chronologies can give an impression of gradual change, better temporal control may reveal multiple episodes of rapid disruption comprised in that span. Precise dating through radiocarbon determinations and ceramic studies is particularly important for the study of the Preclassic collapse, which lacks calendrical dates recorded in texts. The high-precision chronology of Ceibal revealed waves of decline over the course of the Preclassic and Classic collapses in a temporal resolution that was not possible before. The emerging understanding of similarities and differences in the two cases of collapse provides an important basis for evaluating the vulnerability and resilience of Maya political systems.
The Misunderstood Striped Bass of the Saint John River, New Brunswick: Past, Present, and Future
Authors: Andrews S. N. , Linnansaari T. , Curry R. A. , Dadswell M. J. 
Published: January 2017

Abstract
The Striped Bass Morone saxatilis of the Saint John River, New Brunswick, is an enigma, having now existed in a state of uncertain species status for more than four decades. Despite a well-established historical record of adult occurrence in large numbers, the available literature, historical accounts, and status reports contain no evidence for the persistence of a native, reproducing Striped Bass population. In 2012, the Committee on the Status of Endangered Wildlife in Canada listed the Saint John River Striped Bass as endangered as part of the Bay of Fundy designatable unit. This listing lacked current peer-reviewed literature and based its conclusions predominately on restatements of findings and opinions from the 1970s and 1980s. After the apparent failure of Striped Bass spawning in the 1975, the decline of native Saint John River Striped Bass was accredited to many factors ranging from chemical pollutants to overfishing to the installation of a sizeable hydropower facility. Modest attempts to locate eggs and juveniles of the native species have been taken; however, the results have been inconclusive due to ineffective, infrequent, and poorly timed sampling. Here we reviewed all available information, literature, reports, and data to effectively describe the Saint John River Striped Bass population in an effort to help manage and recover (if required) this apparently missing population.
Received March 8, 2016; accepted September 14, 2016Published online January 24, 2017
Airflow resistance measurement for a layer of granular material based on the Helmholtz resonance phenomenon
Authors: Nishizu Takahisa , Tomatsu Eiji , Katsuno Nakako 
Published: January 2017

Abstract
A Helmholtz resonance technique was employed to predict the airflow resistance of layers of granular materials, namely glass beads, brown rice, soybean, adzuki beans, and corn kernels. Each granular sample was placed on the tube mouth of an open-type Helmholtz resonator. The resonant frequency was determined by measuring the electric impedance of a loudspeaker that was installed in the resonator and driven by a chirp signal linearly sweeping from 90 to 220 Hz for 6.0 s. For a changing sample layer thickness, the resonant frequency was measured, and the specific airflow resistance was calculated by measuring the static pressure drop required for N2 gas to flow through the layer at a constant velocity of 0.042 m/s. When the thickness of the layer was fixed, the Helmholtz resonant frequency decreased as the specific airflow resistance increased, regardless of the kind of granular material.
Smoking May Increase Postoperative Opioid Consumption in Patients Who Underwent Distal Gastrectomy With Gastroduodenostomy for Early Stomach Cancer
Authors: Kim Doo Hwan , Park Jun Young , Karm Myong-Hwan , Bae Heon-Yong , Lee Jae-Young , Soo Ahn Ho , Lee Kunhee , Leem Jeong Gil 
Published: January 2017

Objectives:
Although nicotine has an analgesic effect, the incidence and severity of chronic pain is higher in smokers than nonsmokers. Acute pain is more intense in smokers during the perioperative period. This study evaluated whether smokers require higher doses of opioid to reduce pain when they undergo surgery.

Methods:
A retrospective review of 236 patients who had intravenous patient-controlled analgesia after distal gastrectomy with gastroduodenostomy between October 2013 and September 2014 was performed to analyze the difference in postoperative opioid requirements between smokers and nonsmokers. Total opioid consumption was observed from the day of operation to postoperative day 2. Patients were grouped into smokers (N=117) and nonsmokers (N=119) for comparison. Simple and multiple regression analyses were performed to identify predictors of postoperative opioid requirements.

Results:
Opioid consumption by male smokers was higher than nonsmokers. Multiple regression analysis showed that age, smoking, and amount of intraoperative remifentanil were the only significant factors for postoperative opioid requirements.

Discussion:
Our results suggest that smokers undergoing distal gastrectomy with gastroduodenostomy required more opioid than nonsmokers for postoperative pain. Old age, smoking status, and increment of remifentanil use seemed to be predictors of postoperative opioid consumption.
Epidermolytic Ichthyosis Sine Epidermolysis
Authors: Eskin-Schwartz Marina , Drozhdina Marianna , Sarig Ofer , Gat Andrea , Jackman Tomer , Isakov Ofer , Shomron Noam , Samuelov Liat , Malchin Natalia , Peled Alon , Vodo Dan , Hovnanian Alain , Ruzicka Thomas , Koshkin Sergei , Harmon Robert M. , Koetsier Jennifer L. , Green Kathleen J. , Paller Amy S. , Sprecher Eli 
Published: January 2017

Abstract:
Epidermolytic ichthyosis (EI) is a rare disorder of cornification caused by mutations in KRT1 and KRT10, encoding two suprabasal epidermal keratins. Because of the variable clinical features and severity of the disease, histopathology is often required to correctly direct the molecular analysis. EI is characterized by hyperkeratosis and vacuolar degeneration of the upper epidermis, also known as epidermolytic hyperkeratosis, hence the name of the disease. In the current report, the authors describe members of 2 families presenting with clinical features consistent with EI. The patients were shown to carry classical mutations in KRT1 or KRT10, but did not display epidermolytic changes on histology. These observations underscore the need to remain aware of the limitations of pathological features when considering a diagnosis of EI.
Malignancy risk of sonographically benign appearing purely solid adnexal masses in asymptomatic postmenopausal women
Authors: Alcazar Juan Luis , Pascual Maria Angela , Marquez Reyes , Ajossa Silvia , Juez Leire , Graupera Betlem , Piras Alba , Hereter Lourdes , Guerriero Stefano 
Published: January 2017

Abstract

Objective:
To assess the natural history of benign appearing purely solid ovarian lesions in asymptomatic postmenopausal women.

Methods:
Retrospective observational cohort study comprising 99 women (mean age, 58.2 years, ranging from 50 to 77 years) diagnosed as having a purely solid ovarian lesion at transvaginal ultrasound between April 2001 and October 2015. Inclusion criteria were as follows: asymptomatic postmenopausal women with a well-defined purely solid ovarian lesion with International Ovarian Tumor Analysis color score 1 or 2, without ascites and/or signs of carcinomatosis. Clinical, sonographic, biochemical (CA-125), and histologic data (in case of surgery) were retrieved for analysis. Patients who were managed conservatively were assessed by transvaginal sonography every 6 months for a minimum of a year. In case of bilateral lesions we used the largest one for analysis.

Results:
Five women (5.1%) had bilateral lesions. Mean size of the lesion was 2.9 cm (range, 1.0-7.8 cm). Most lesions were homogeneous (96.0%). Acoustic shadowing was present in 59.6% of cases. International Ovarian Tumor Analysis color score was 1 in 77.8% and 2 in 22.2% of the cases, respectively. Median CA-125 was 10.8 IU/mL (range, 3.0-403.0 IU/mL). Forty-two women underwent surgery after diagnosis (histologic diagnoses were as follows: fibroma (n = 26), fibrothecoma (n = 5), dermoid (n = 3), Brenner tumor (n = 3), endometrioma (n = 2), thecoma (n = 1), primary invasive cancer (n = 2). One case of invasive cancer CA-125 was 403.0 IU/mL and in the other case CA-125 was 6.0 IU/mL. They both were stage 1. Fifty-seven women were managed with serial follow-up. With a median follow-up time of 36 months (range, 12-142 months) all these lesions had no change and women remain asymptomatic. Considering all 99 cases the risk of malignancy is 2% (95% CI, 0.1-7.5).

Conclusions:
The risk of malignancy of benign appearing purely solid adnexal masses in asymptomatic postmenopausal women is low. Conservative management of these lesions might be an option.
Genetic variants of age at menopause are not related to timing of ovarian failure in breast cancer survivors
Authors: Homer Michael V. , Charo Lindsey M. , Natarajan Loki , Haunschild Carolyn , Chung Karine , Mao Jun J. , DeMichele Angela M. , Su H. Irene 
Published: January 2017

AbstractObjective:To determine if interindividual genetic variation in single-nucleotide polymorphisms (SNPs) related to age at natural menopause is associated with risk of ovarian failure in breast cancer survivors.Methods:A prospective cohort of 169 premenopausal breast cancer survivors recruited at diagnosis with stages 0 to III disease were followed longitudinally for menstrual pattern via self-reported daily menstrual diaries. Participants were genotyped for 13 SNPs previously found to be associated with age at natural menopause:EXO1,TLK1,HELQ,UIMC1,PRIM1,POLG,TMEM224,BRSK1, andMCM8. A risk variable summed the total number of risk alleles in each participant. The association between individual genotypes, and also the risk variable, and time to ovarian failure (>12 months of amenorrhea) was tested using time-to-event methods.Results:Median age at enrollment was 40.5 years (range 20.6-46.1). The majority of participants were white (69%) and underwent chemotherapy (76%). Thirty-eight participants (22%) experienced ovarian failure. None of the candidate SNPs or the summary risk variable was significantly associated with time to ovarian failure. Sensitivity analysis restricted to whites or only to participants receiving chemotherapy yielded similar findings. Older age, chemotherapy exposure, and lower body mass index were related to shorter time to ovarian failure.Conclusions:Thirteen previously identified genetic variants associated with time to natural menopause were not related to timing of ovarian failure in breast cancer survivors.
Are Disposable and Standard Gonioscopy Lenses Comparable?
Authors: Lee Bonny , Szirth Bernard C. , Fechtner Robert D. , Khouri Albert S. 
Published: January 2017

Purpose:
Gonioscopy is important in the evaluation and treatment of glaucoma. With increased scrutiny of acceptable sterilization processes for health care instruments, disposable gonioscopy lenses have recently been introduced. Single-time use lenses are theorized to decrease infection risk and eliminate the issue of wear and tear seen on standard, reusable lenses. However, patient care would be compromised if the quality of images produced by the disposable lens were inferior to those produced by the reusable lens. The purpose of this study was to compare the quality of images produced by disposable versus standard gonioscopy lenses.

Materials and Methods:
A disposable single mirror lens (Sensor Medical Technology) and a standard Volk G-1 gonioscopy lens were used to image 21 volunteers who were prospectively recruited for the study. Images of the inferior and temporal angles of each subject’s left eye were acquired using a slit-lamp camera through the disposable and standard gonioscopy lens. In total, 74 images were graded using the Spaeth gonioscopic system and for clarity and quality. Clarity was scored as 1 or 2 and defined as either (1) all structures perceived or (2) all structures not perceived. Quality was scored as 1, 2, or 3, and defined as (1) all angle landmarks clear and well focused, (2) some angle landmarks clear, others blurred, or (3) angle landmarks could not be ascertained. The 74 images were divided into images taken with the disposable single mirror lens and images taken with the standard Volk G-1 gonioscopy lens. The clarity and quality scores for each of these 2 image groups were averaged and P-values were calculated.

Results:
Average quality of images produced with the standard lens was 1.46±0.56 compared with 1.54±0.61 for those produced with the disposable lens (P=0.55). Average clarity of images produced with the standard lens was 1.47±0.51 compared with 1.49±0.51 (P=0.90) with the disposable lens.

Conclusions:
We conclude that there is no significant difference in quality of images produced with standard versus disposable gonioscopy lenses. Disposable gonioscopy lenses may be an acceptable alternative to standard reusable lenses, especially in conditions where sterilization is difficult.
Can Glaucomatous Visual Field Progression be Predicted by Structural and Functional Measures?
Authors: Schrems Wolfgang A. , Schrems-Hoesl Laura-M. , Mardin Christian Y. , Laemmer Robert , Kruse Friedrich E. , Horn Folkert K. 
Published: January 2017

Purpose:
The aim of this study was to compare the predictive value of retinal nerve fiber layer thickness (RNFLT) measurements obtained by optical coherence tomography (OCT), morphometric parameters of confocal scanning laser ophthalmoscopy (CSLO), and frequency-doubling technique perimetry to predict visual field conversion of normal individuals, ocular hypertensive subjects, and early preperimetric glaucoma patients as determined by standard automated perimetry (SAP).

Patients and Methods:
This longitudinal single-center study included 107 eyes of 56 controls, 164 eyes of 98 patients with ocular hypertension, and 169 eyes of 110 patients with preperimetric glaucoma. At baseline, all patients and controls underwent OCT (Spectralis OCT), CSLO (Heidelberg Retina Tomograph) examination, optic disc photography, and frequency-doubling technique perimetry. At baseline SAP was normal in all participants. Univariate and multivariate hazard ratios (HRs) were measured to model the conversion-free survival including morphometric functional and clinical variables.

Results:
The median follow-up period was 6.9 years. In total, 48 eyes (10.9%) demonstrated visual field conversion in the follow-up. RNFLT temporal-inferior outside normal limits demonstrated the highest HR with 1.2 (95% confidence interval, 1.1-1.4) per 10 μm loss for OCT, and Glaucoma probability score global outside normal limits demonstrated the highest HR with 1.3 (95 % confidence interval, 1.1-1.5) per 0.1 increase for CSLO in a multivariate model adjusted for photograph-based glaucoma staging, central corneal thickness, and SAP pattern SD.

Conclusions:
Both measurement of RNFLT by OCT and Glaucoma probability score by CSLO are highly predictive of future visual field conversion and provide independent predictive information beyond optic disc assessment, central corneal thickness, and SAP pattern SD.
Exploring the Mechanism Underlying the Association Between Pain Intensity and Mental Health Among Latinos
Authors: Zvolensky Michael J. , Bakhshaie Jafar , Paulus Daniel J. , Langdon Kirsten J. , Garza Monica , Valdivieso Jeanette , Ditre Joseph , Ochoa-Perez Melissa , Lemaire Chad , Bogiaizian Daniel , Robles Zuky , Rodríguez-Cano Rubén , Manning Kara 
Published: January 2017

Abstract
There is limited understanding of pain and its relationship to mental health in Latinos, and limited knowledge about the biobehavioral mechanisms that underlie pain–mental health interrelations. To address these gaps, the present investigation sought to address whether anxiety sensitivity explained relations between pain intensity and anxious arousal, depressive symptoms, social anxiety, and depressive and anxiety disorders among an economically disadvantaged Latino sample. Participants included 349 adult Latinos (88% women; Mage = 38.8) who attended a community-based primary health care. In the multiple mediation model, anxiety sensitivity physical concerns accounted for the association between pain intensity and anxious arousal symptoms, cognitive concerns accounted for the association between pain intensity and depressive symptoms, and social concerns accounted for the association between pain intensity and social anxiety symptoms. This is the first study to demonstrate the explanatory role of anxiety sensitivity in pain-affective associations among disadvantaged Latinos.
Increased Trichotillomania Symptoms in a Child With Fluoxetine Treatment
Authors: Yektaş Çiğdem , Tufan Ali Evren 
Published: January 2017

Abstract
Trichotillomania (TTM) is a mental disorder characterized by uncontrolled and impulsive hair pulling leading to hair loss, distress, and disordered functioning. Treatment choices include behavioral therapy (especially habit reversal training) and selective serotonin reuptake inhibitors. However, randomized controlled trials conducted with selective serotonin reuptake inhibitors have led to controversial results of effectiveness for TTM. Here, we report a female patient whose TTM symptoms increased after fluoxetine use.
Common foundations of optimal control across the sciences: evidence of a free lunch
Authors: Russell Benjamin , Rabitz Herschel 
Published: January 2017

A common goal in the sciences is optimization of an objective function by selecting control variables such that a desired outcome is achieved. This scenario can be expressed in terms of a control landscape of an objective considered as a function of the control variables. At the most basic level, it is known that the vast majority of quantum control landscapes possess no traps, whose presence would hinder reaching the objective. This paper reviews and extends the quantum control landscape assessment, presenting evidence that the same highly favourable landscape features exist in many other domains of science. The implications of this broader evidence are discussed. Specifically, control landscape examples from quantum mechanics, chemistry and evolutionary biology are presented. Despite the obvious differences, commonalities between these areas are highlighted within a unified mathematical framework. This mathematical framework is driven by the wide-ranging experimental evidence on the ease of finding optimal controls (in terms of the required algorithmic search effort beyond the laboratory set-up overhead). The full scope and implications of this observed common control behaviour pose an open question for assessment in further work.
This article is part of the themed issue ‘Horizons of cybernetical physics’.
Control of autoresonance in mechanical and physical models
Authors: Kovaleva A. 
Published: January 2017

Autoresonant energy transfer has been considered as one of the most effective methods of excitation and control of high-energy oscillations for a broad range of physical and engineering systems. Nonlinear time-invariant feedback control provides effective self-tuning and self-adaptation mechanisms targeted at preserving resonance oscillations under variations of the system parameters but its implementation may become extremely complicated. A large class of systems can avoid nonlinear feedback, still producing the required state due to time-variant feed-forward frequency control. This type of control in oscillator arrays employs an intrinsic property of a nonlinear oscillator to vary both its amplitude and the frequency when the driving frequency changes. This paper presents a survey of recently published and new results studying possibilities and limitations of time-variant frequency control in nonlinear oscillator arrays.
This article is part of the themed issue ‘Horizons of cybernetical physics’.
Cone separation, quadratic control systems and control of spin dynamics in the presence of decoherence
Authors: Khaneja Navin 
Published: January 2017

In this paper, we study some control problems related to the control of coupled spin dynamics in the presence of relaxation and decoherence in nuclear magnetic resonance spectroscopy. The decoherence is modelled through a master equation. We study some model problems, whereby, through an appropriate choice of state variables, the system is reduced to a control system, where the state enters linearly and controls quadratically. We study this quadratic control system. Study of this system gives us explicit bounds on how close a coupled spin system can be driven to its target state and how much coherence and polarization can be transferred between coupled spins. Optimal control for the quadratic control system can be understood as the separation of closed cones, and we show how the derived results on optimal efficiency can be interpreted in this formulation. Finally, we study some finite-time optimal control problems for the quadratic control system.
This article is part of the themed issue ‘Horizons of cybernetical physics’.
Controllability of networked higher-dimensional systems with one-dimensional communication
Authors: Wang Lin , Wang Xiaofan , Chen Guanrong 
Published: January 2017

In this paper, the state controllability of networked higher-dimensional linear time-invariant dynamical systems is considered, where communications are performed through one-dimensional connections. The influences on the controllability of such a networked system are investigated, which come from a combination of network topology, node-system dynamics, external control inputs and inner interactions. Particularly, necessary and sufficient conditions are presented for the controllability of the network with a general topology, as well as for some special settings such as cycles and chains, which show that the observability of the node system is necessary in general and the controllability of the node system is necessary for chains but not necessary for cycles. Moreover, two examples are constructed to illustrate that uncontrollable node systems can be assembled to a controllable networked system, while controllable node systems may lead to uncontrollable systems even for the cycle topology.
This article is part of the themed issue ‘Horizons of cybernetical physics’.
Synchronization patterns: from network motifs to hierarchical networks
Authors: Krishnagopal Sanjukta , Lehnert Judith , Poel Winnie , Zakharova Anna , Schöll Eckehard 
Published: January 2017

We investigate complex synchronization patterns such as cluster synchronization and partial amplitude death in networks of coupled Stuart–Landau oscillators with fractal connectivities. The study of fractal or self-similar topology is motivated by the network of neurons in the brain. This fractal property is well represented in hierarchical networks, for which we present three different models. In addition, we introduce an analytical eigensolution method and provide a comprehensive picture of the interplay of network topology and the corresponding network dynamics, thus allowing us to predict the dynamics of arbitrarily large hierarchical networks simply by analysing small network motifs. We also show that oscillation death can be induced in these networks, even if the coupling is symmetric, contrary to previous understanding of oscillation death. Our results show that there is a direct correlation between topology and dynamics: hierarchical networks exhibit the corresponding hierarchical dynamics. This helps bridge the gap between mesoscale motifs and macroscopic networks.
This article is part of the themed issue ‘Horizons of cybernetical physics’.