scholarly journals Spectropolarimetric fluctuations in a sunspot chromosphere

2020 ◽  
Vol 379 (2190) ◽  
pp. 20200216 ◽  
Author(s):  
M. Stangalini ◽  
D. Baker ◽  
G. Valori ◽  
D. B. Jess ◽  
S. Jafarzadeh ◽  
...  
Keyword(s):  
Potential Effect ◽  
Elemental Abundance ◽  
Mhd Waves ◽  
New Era ◽  
Wave Dynamics ◽  
Corona Of The Sun ◽  
Lower Solar Atmosphere ◽  
First Ionization Potential ◽  
Insight Into ◽  
Made In

The instrumental advances made in this new era of 4 m class solar telescopes with unmatched spectropolarimetric accuracy and sensitivity will enable the study of chromospheric magnetic fields and their dynamics with unprecedented detail. In this regard, spectropolarimetric diagnostics can provide invaluable insight into magneto-hydrodynamic (MHD) wave processes. MHD waves and, in particular, Alfvénic fluctuations associated with particular wave modes were recently recognized as important mechanisms not only for the heating of the outer layers of the Sun’s atmosphere and the acceleration of the solar wind, but also for the elemental abundance anomaly observed in the corona of the Sun and other Sun-like stars (also known as first ionization potential) effect. Here, we take advantage of state-of-the-art and unique spectropolarimetric Interferometric BIdimensional Spectrometer observations to investigate the relation between intensity and circular polarization (CP) fluctuations in a sunspot chromosphere. Our results show a clear link between the intensity and CP fluctuations in a patch which corresponds to a narrow range of magnetic field inclinations. This suggests the presence of Alfvénic perturbations in the sunspot. This article is part of the Theo Murphy meeting issue ‘High-resolution wave dynamics in the lower solar atmosphere’.

Will Love Tear Us Apart: Adapting the Lyrical to the Ludic

CounterText ◽  
2016 ◽  
Vol 2 (2) ◽  
pp. 217-235
Author(s):  
Gordon Calleja
Keyword(s):  
Design Process ◽  
Game Design ◽  
Digital Games ◽  
Design Decisions ◽  
The Core ◽  
Lyrical Poetry ◽  
Insight Into ◽  
Made In

This paper gives an insight into the design process of a game adaptation of Joy Division's Love Will Tear Us Apart (1980). It outlines the challenges faced in attempting to reconcile the diverging qualities of lyrical poetry and digital games. In so doing, the paper examines the design decisions made in every segment of the game with a particular focus on the tension between the core concerns of the lyrical work being adapted and established tenets of game design.

Optimum Infinite is a new era of oxygen permeability material for contact lenses

The Eye ◽  
2020 ◽  
Vol 22 (129) ◽  
pp. 44-46
Author(s):  
Mark Eddleston
Keyword(s):  
Contact Lens ◽  
Oxygen Permeability ◽  
Contact Lenses ◽  
New Era ◽  
Lens Material ◽  
Insight Into

Optimum Infinite is a new GP contact lens material, with an oxygen permeability of 180 barrer and was launched by Contamac at the GSLS 2019. This article provides an insight into the development and characteristics of this breakthrough material.

New insight into the molecular switch mechanism of human Rho family proteins: shifting a paradigm

2013 ◽  
Vol 394 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Mamta Jaiswal ◽  
Eyad Kalawy Fansa ◽  
Radovan Dvorsky ◽  
Mohammad Reza Ahmadian
Keyword(s):  
Quantitative Analysis ◽  
Bound State ◽  
Molecular Switch ◽  
Nucleotide Exchange ◽  
Gtp Binding ◽  
Switch Mechanism ◽  
Rho Family ◽  
Rho Family Proteins ◽  
Insight Into ◽  
Made In

Abstract Major advances have been made in understanding the structure, function and regulation of the small GTP-binding proteins of the Rho family and their involvement in multiple cellular process and disorders. However, intrinsic nucleotide exchange and hydrolysis reactions, which are known to be fundamental to Rho family proteins, have been partially investigated in the case of RhoA, Rac1 and Cdc42, but for others not at all. Here we present a comprehensive and quantitative analysis of the molecular switch functions of 15 members of the Rho family that enabled us to propose an active GTP-bound state for the rather uncharacterized isoforms RhoD and Rif under equilibrium and quiescent conditions.

Formation, translocation and resolution of Holliday junctions during homologous genetic recombination

1995 ◽  
Vol 347 (1319) ◽  
pp. 21-25 ◽  
Keyword(s):  
Molecular Mechanisms ◽  
Genetic Recombination ◽  
Holliday Junctions ◽  
The Novel ◽  
E Coli ◽  
The Past ◽  
Endonucleolytic Cleavage ◽  
Insight Into ◽  
Made In

Over the past three or four years, great strides have been made in our understanding of the proteins involved in recombination and the mechanisms by which recombinant molecules are formed. This review summarizes our current understanding of the process by focusing on recent studies of proteins involved in the later steps of recombination in bacteria. In particular, biochemical investigation of the in vitro properties of the E. coli RuvA, RuvB and RuvC proteins have provided our first insight into the novel molecular mechanisms by which Holliday junctions are moved along DNA and then resolved by endonucleolytic cleavage.

Recent progress in the freeze-etching technique

1971 ◽  
Vol 261 (837) ◽  
pp. 121-131 ◽  
Keyword(s):  
High Vacuum ◽  
Molecular Size ◽  
Etching Technique ◽  
Structural Distortions ◽  
Shadow Casting ◽  
Structural Details ◽  
Freeze Etching ◽  
The One ◽  
Insight Into ◽  
Made In

The freeze-etching technique must be improved if structures at the molecular size level are to be seen. The limitations of the technique are discussed here together with the progress made in alleviating them. The vitrification of living specimens is limited by the fact that very high freezing rates are needed. The critical freezing rate can be lowered on the one hand by the introduction of antifreeze agents, on the other hand by the application of high hydrostatic pressure. The fracture process may cause structural distortions in the fracture face of the frozen specimen. The ‘double-replica’ method allows one to evaluate such artefacts and provides an insight into the way that membranes split. During etching there exists the danger of contaminating the fracture faces with condensable gases. Because of specimen temperatures below —110 °C, special care has to be taken in eliminating water vapour from the high vacuum. An improvement in coating freeze-etched specimens has resulted from the application of electron guns for evaporation of the highest melting-point metals. If heat transfer from gun to specimen is reduced to a minimum, Pt, Ir, Ta, W and C can be used for shadow casting. Best results are obtained with Pt-C and Ta-W . With the help of decoration effects Pt-C shadow castings give the most information about the fine structural details of the specimen.

scholarly journals “It’s Not Just a Simple Meal. It’s So Much More”: Interactions Between Meals on Wheels Clients and Drivers

2018 ◽  
Vol 39 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Kali S. Thomas ◽  
Emily A. Gadbois ◽  
Renee R. Shield ◽  
Ucheoma Akobundu ◽  
Andrea M. Morris ◽  
...  
Keyword(s):  
The United States ◽  
Case Managers ◽  
Qualitative Research Study ◽  
Personal Benefit ◽  
Meals On Wheels ◽  
Clear Insight ◽  
Additional Support ◽  
Insight Into ◽  
Made In ◽  
Meal Delivery

Background and Objectives: Meals on Wheels (MOW) programs provide home-delivered meals to over 1.5 million older adults; yet, very little is known about the drivers who make meal deliveries possible. Specifically, we do not have clear insight into their interaction with clients or the benefits that they may receive through their service. The objective of this article is to describe the characteristics of MOW drivers, the interactions among drivers and clients, and the benefits of the program to both. Research Design and Method: This qualitative research study reports on interviews with 84 MOW staff (leadership, case managers/client assessors, volunteer coordinators) and drivers at six geographically and operationally distinct programs across the United States. Results: Qualitative analysis of the interviews with MOW staff and drivers revealed the following key themes: (a) clients have multiple vulnerabilities; (b) clients appear to derive social, as well as nutritional benefit from receiving meals; (c) drivers report they provide additional support to their clients beyond delivering the meal; (d) social bonds between drivers and clients were reported to strengthen over time; (e) drivers claim that they, too, derive validation and personal benefit through their meal delivery. Discussion and Implications: This research highlights the significant contributions that meal delivery drivers made in the lives of MOW clients beyond the actual meal itself. This research also spotlights the perceived benefits experienced by the drivers and points to the importance of conducting further research to determine the effects of meal delivery on client and drivers’ outcomes, more broadly.

scholarly journals Closing up onto our sun: solar imaging

2020 ◽  
Vol 240 ◽  
pp. 07011
Author(s):  
Kushagra Shrivastava ◽  
Keith Wen Kai Chia ◽  
Kang Jun Wong ◽  
Alfred Yong Liang Tan ◽  
Hwee Tiang Ning
Keyword(s):  
Solar Activity ◽  
The Sun ◽  
Research Needs ◽  
Large Numbers ◽  
Wide Range ◽  
Future Science ◽  
Insight Into ◽  
Term Data ◽  
Made In

Solar activity research provides insight into the Sun’s past, future (Science Daily, 2018). The solar activity includes observations of large numbers of intense sunspots, flares, and other phenomena; and demands a wide range of techniques and measurements on the observations. This research needs long term data collection before critical analyses can occur, to generate meaningful learning and knowledge. In this project, we will use solar imaging to make observations of solar activity, and take our baby steps to make contributions in citizen science. Observations will be made in 3 wavelengths to gain a more thorough analysis by looking at different perspectives of the Sun, namely H-Alpha, Calcium-K, and white light.

scholarly journals The Rise of the OM-LoC: Opto-Microfluidic Enabled Lab-on-Chip

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1467
Author(s):  
Harry Dawson ◽  
Jinane Elias ◽  
Pascal Etienne ◽  
Sylvie Calas-Etienne
Keyword(s):  
Low Cost ◽  
Optical Components ◽  
New Era ◽  
Lab On Chip ◽  
Highly Sensitive ◽  
Multiple Challenges ◽  
On Chip ◽  
Optical Circuits ◽  
Made In

The integration of optical circuits with microfluidic lab-on-chip (LoC) devices has resulted in a new era of potential in terms of both sample manipulation and detection at the micro-scale. On-chip optical components increase both control and analytical capabilities while reducing reliance on expensive laboratory photonic equipment that has limited microfluidic development. Notably, in-situ LoC devices for bio-chemical applications such as diagnostics and environmental monitoring could provide great value as low-cost, portable and highly sensitive systems. Multiple challenges remain however due to the complexity involved with combining photonics with micro-fabricated systems. Here, we aim to highlight the progress that optical on-chip systems have made in recent years regarding the main LoC applications: (1) sample manipulation and (2) detection. At the same time, we aim to address the constraints that limit industrial scaling of this technology. Through evaluating various fabrication methods, material choices and novel approaches of optic and fluidic integration, we aim to illustrate how optic-enabled LoC approaches are providing new possibilities for both sample analysis and manipulation.

scholarly journals Korok és Kórok kiállítás 2019-2020

2021 ◽  
Vol 11 (22) ◽  
pp. 305-315
Author(s):  
Krisztina Scheffer ◽  
Enikő Szvák ◽  
Hedvig Győry
Keyword(s):  
Natural History ◽  
Educational Program ◽  
Art Museum ◽  
Additional Material ◽  
History Museum ◽  
Museum Visitors ◽  
Know How ◽  
Hungarian Natural History Museum ◽  
Insight Into ◽  
Made In

The HNM Semmelweis Museum of Medical History's exhibition „Diseases for the Ages, What the Deceased Tell Us”, is displaying the anthropological collection of the Museum which never was presented earlier, and the mummy-research made in the framework of the Nephthys Project, with some additional material from the Hungarian Natural History Museum and the Hopp Ferenc Asian Art Museum. Visitors can learn about the appearance of known and little-known diseases visible on archaeological human remains and gain insight into the know-how and the results of the mummy research. The exhibition is accompanied by a museum educational program and a series of lectures.

scholarly journals Coastal and Marine Socio-Ecological Systems: A Systematic Review of the Literature

2021 ◽  
Vol 8 ◽  
Author(s):  
Sonia Refulio-Coronado ◽  
Katherine Lacasse ◽  
Tracey Dalton ◽  
Austin Humphries ◽  
Suchandra Basu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Social Systems ◽  
Ecological Systems ◽  
Review Of The Literature ◽  
Nutrient Runoff ◽  
Bacterial Pollution ◽  
Marine Management ◽  
Complex Environmental Problems ◽  
Insight Into ◽  
Made In

The socio-ecological systems (SESs) framework provides cross-disciplinary insight into complex environmental problems. Numerous studies have applied the SES framework to coastal and marine environments over the last two decades. We review and analyze 98 of those studies to (i) describe how SES concepts were examined and measured, (ii) describe how the studies included feedbacks and thresholds, and (iii) identify and analyze elements unique to coastal and marine SES frameworks. We find that progress has been made in understanding key SES properties in coastal and marine ecosystems, which include resilience, adaptive capacity, vulnerability, and governance. A variety of methods has been developed and applied to analyze these features qualitatively and quantitatively. We also find that recent studies have incorporated land-based stressors in their analyses of coastal issues related to nutrient runoff, bacterial pollution, and management of anadromous species to represent explicit links in land-to-sea continuums. However, the literature has yet to identify methods and data that can be used to provide causal evidence of non-linearities and thresholds within SES. In addition, our findings suggest that greater alignment and consistency are needed in models with regard to metrics and spatial boundaries between ecological and social systems to take full advantage of the SES framework and improve coastal and marine management.

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