Measurement of the Current-Phase Relation in Josephson Junctions Rhombi Chains

We present low temperature transport measurements in one dimensional Josephson junctions rhombi chains. We have measured the current phase relation of a chain of 8 rhombi. The junctions are either in the classical phase regime with the Josephson energy much larger than the charging energy, $E_{J}\gg E_{C}$, or in the quantum phase regime where $E_{J}/E_{C}\approx 2$. In the strong Josephson coupling regime ($E_{J}\gg E_{C} \gg k_{B}T$) we observe a sawtooth-like supercurrent as a function of the phase difference over the chain. The period of the supercurrent oscillations changes abruptly from one flux quantum $\Phi_{0}$ to half the flux quantum $\Phi_{0}/2$ as the rhombi are tuned in the vicinity of full frustration. The main observed features can be understood from the complex energy ground state of the chain. For $E_{J}/E_{C}\approx 2$ we do observe a dramatic suppression and rounding of the switching current dependence which we found to be consistent with the model developed by Matveev et al.(Phys. Rev. Lett. {\bf 89}, 096802(2002)) for long Josephson junctions chains.Comment: to appear in Phys. Rev.

Measured unsteady transonic aerodynamic characteristics of an elastic supercritical wing with an oscillating control surface

Transonic steady and unsteady aerodynamic data were measured on a large elastic wing in the NASA Langley Transonic Dynamics Tunnel. The wing had a supercritical airfoil shape and a leading-edge sweepback of 28.8 deg. The wing was heavily instrumented to measure both static and dynamic pressures and deflections. A hydraulically driven outboard control surface was oscillated to generate unsteady airloads on the wing. Representative results from the wind tunnel tests are presented and discussed, and the unexpected occurrence of an unusual dynamic wing instability, which was sensitive to angle of attack, is reported

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A B S T R A K P e n e l i t i a n i n i b e r t u j u a n u n t u k m e n g e t a h u i p e m b e r i a n K o m p e n s a s i , k o n d i s i D i s i p l i n K e r j a d a n K i n e r j a G u r u , s e r t a u n t u k m e n g e t a h u i s e b e r a p a b e s a r p e n g a r u h v a r i a b e l K o m p e n s a s i d a n D i s i p l i n K e r j a t e r h a d a p K i n e r j a G u r u b a i k s e c a r a s i m u l t a n m a u p u n s e c a r a p a r s i a l d i S M A N e g e r i 1 J a t i s a r i K a b u p a t e n K a r a w a n g . S a m p e l d a l a m p e n e l i t i a n i n i j u m l a h s e l u r u\ud h p o p u l a s i y a n g b e r j u m l a h 4 9 G u r u . M e t o d e p e n e l i t i a n y a n g d i g u n a k a n a d a l a h a n a l i s i s r e g r e s i b e r g a n d a , a n a l i s i s k o r e l a s i b e r g a n d a , a n a l i s i s k o e f i s i e n d e t e r m i n a s i s i m u l t a n d a n p a r s i a l . H a s i l p e n e l i t i a n m e n u n j u k k a n b a h w a k o m p e n s a s i y a n g d i b e r i k a n m a s i h t e r m a s u k k a t e g o r i c u k u p , m e n g e n a i d i s i p l i n k e r j a s e c a r a u m u m r e s p o n d e n m e n y a t a k a n d a l a m k a t e g o r i c u k u p , d a n k i n e r j a g u r u b e r a d a p a d a k a t e g o r i c u k u p . K o m p e n s a s i d a n D i s i p l i n K e r j a s e c a r a s i m u l t a n m a u p u n p a r s i a l b e r p e n g a r u h s i g n i f i k a n t e r h a d a p K i n e r j a g u r u . S e c a r a s i m u l t a n p e n g a r u h n y a a d a l a h 8 1 , 9 % d a n s i s a n y a 1 8 , 1 % d i p e n g a r u h i o l e h v a r i a b e l l a i n . V a r i a b e l y a n g b e r p e n g a r u h d o m i n a n a d a l a h K o m p e n s a s i . K a t a K u n c i : K o m p e n s a s i , D i s i p l i n K e r j a , d a n K i n e r j a G u r

INFLUENCE OF ILLNESS INTRUSIVENESS, NEUROTICISM AND DEMOGRAPHIC VARIABLES ON EMOTIONAL DISTRESS AMONG HYPERTENSIVE AND DIABETIC PATIENTS

This cross-sectional survey investigated the influence of illness intrusiveness and personality on emotional distress in chronic medical conditions. Participants were 259 outpatient attendees of two General Hospitals in Ibadan, South-Western Nigeria: 137 in treatment for hypertension and 122 in treatment for diabetes mellitus. A psychological battery, consisting of standardized measures of illness intrusiveness, personality (neuroticism), emotional distress and a socio-demographic prototype was used to collect data. Initial analyses indicated that the two samples (diabetic and hypertensive patients) were significantly high (and differentially so) on emotional distress illness (t = 3.04; p<.05), illness intrusiveness (t = 12.28; p<.001) and neuroticism (t = 2.61; p<.05). Furthermore, results indicated that a high level of illness intrusiveness and high neuroticism were indicative of more emotional distress in both diabetes {F(1,118)=5.44;P<.05} and hypertension {F(1,133)=78.40;P<.001}, with both differentially influencing emotional distress. It was strongly recommended that individuals experiencing chronic illness should be helped and encouraged to engage in hobbies and valued activities as much as possible in order to reduce their perceived illness intrusiveness. Psychological intervention should also be conducted for these individuals in order to reduce emotional distres

A method and medium for the electrical detection of Listeria spp. from food

The development of a liquid medium for the detection of Listeria spp. by capacitance monitoring of food samples previously enriched in UVM 1 broth is described. Rapid growth of Listeria monocytogenes was shown to occur in liquid media with selectivity based on antibiotics found in Oxford agar. The final capacitance medium contained higher concentrations of the Oxford selective agents than Oxford agar and did not require the esculin/ferric ammonium citrate reaction to be observed. The medium relied upon the ability of Listeria spp. to induce a greater than 30% change in capacitance within 30 h. When run in parallel with the Listeria spp. test samples of a large food company, the method gave far fewer false-positive results than Fraser broth

Use of cytoceratin-20 in revealing of colorectal cancer metastases in liver

The aim of the study is to evaluate the possibilities of immunohistochemical revealing of colorectal cancer micro-metastases in liver and to determine their prognostic significance. Material et metods. The material of the research was fragments of liver tissue with metastases of 36 patients with colorectal cancer who had undergone resection of liver (main group), and randomly chosen fragments of liver tissue without macro metastases of 18 patients with colorectal cancer who had died in early postoperative period. 5-6 fragments of the liver tissue taken from the margins of the largest macro metastasis with the interval 1-2 cm were investigated in each case. The detection of micro-metastases on the paraffin sections with the thickness of 4 microns was carried out with the use of antibodies to cytoceratin-20. The results showed that micro-metastases in liver in the main group had been found in 75,9%, in the comparative group — just in one observation with accidentally revealed macro metastasis. Correlative analysis showed the direct definite link between the appearance of micro-metastases and the presence of macro metastases in liver. The significance of multimicrometastatic spreading for the development of intrahepatic progression and the worsening of the long term prognosis of the patients with colorectal cancer were noted. Conclusion: the possibility of use cytoceratin-20 for revealing micro-metastases in liver

From the zero-field metal-insulator transition in two dimensions to the quantum Hall transition: a percolation-effective-medium theory

Effective-medium theory is applied to the percolation description of the metal-insulator transition in two dimensions with emphasis on the continuous connection between the zero-magnetic-field transition and the quantum Hall transition. In this model the system consists of puddles connected via saddle points, and there is loss of quantum coherence inside the puddles. The effective conductance of the network is calculated using appropriate integration over the distribution of conductances, leading to a determination of the magnetic field dependence of the critical density. Excellent quantitative agreement is obtained with the experimental data, which allows an estimate of the puddle physical parameters

Emission-aware Energy Storage Scheduling for a Greener Grid

Reducing our reliance on carbon-intensive energy sources is vital for reducing the carbon footprint of the electric grid. Although the grid is seeing increasing deployments of clean, renewable sources of energy, a significant portion of the grid demand is still met using traditional carbon-intensive energy sources. In this paper, we study the problem of using energy storage deployed in the grid to reduce the grid's carbon emissions. While energy storage has previously been used for grid optimizations such as peak shaving and smoothing intermittent sources, our insight is to use distributed storage to enable utilities to reduce their reliance on their less efficient and most carbon-intensive power plants and thereby reduce their overall emission footprint. We formulate the problem of emission-aware scheduling of distributed energy storage as an optimization problem, and use a robust optimization approach that is well-suited for handling the uncertainty in load predictions, especially in the presence of intermittent renewables such as solar and wind. We evaluate our approach using a state of the art neural network load forecasting technique and real load traces from a distribution grid with 1,341 homes. Our results show a reduction of >0.5 million kg in annual carbon emissions -- equivalent to a drop of 23.3% in our electric grid emissions.Comment: 11 pages, 7 figure, This paper will appear in the Proceedings of the ACM International Conference on Future Energy Systems (e-Energy 20) June 2020, Australi