scholarly journals Origin and Flow History of Air Parcels in Orographic Banner Clouds

2015 ◽  
Vol 72 (9) ◽  
pp. 3389-3403 ◽  
Author(s):  
Sebastian Schappert ◽  
Volkmar Wirth
Keyword(s):  
Wind Field ◽  
Large Eddy Simulations ◽  
The Other ◽  
Current Investigation ◽  
Large Eddy ◽  
Long Time ◽  
History Of ◽  
Low Altitude ◽  
Basic Features ◽  
Different Characteristics

Abstract Banner clouds are clouds in the lee of steep mountains or sharp ridges. Previous work suggests that the main formation mechanism is vertical uplift in the lee of the mountain. On the other hand, little is known about the Lagrangian behavior of air parcels as they pass the mountain, which motivates the current investigation. Three different diagnostics are applied in the framework of large-eddy simulations of airflow past an isolated pyramid-shaped obstacle: Eulerian tracers indicating the initial positions of the parcels, streamlines along the time-averaged wind field, and online trajectories computed from the instantaneous wind field. All three methods diagnose a plume of large vertical uplift in the immediate lee of the mountain. According to the time-mean Eulerian tracers, the cloudy parcels originated within a fairly small coherent area at the inflow boundary. In contrast, the time-mean streamlines indicate a bifurcation into two distinct classes of air parcels with very different characteristics. The parcels in the first class originate at intermediate altitudes, pass the obstacle close to its summit, and proceed directly into the cloud. By contrast, the parcels in the second class start at low altitude and take a fairly long time before they reach the cloud on a spiraling path. A humidity tracer quantifies mixing, revealing partial moistening for the first class of parcels and drying for the second class of parcels. For the online trajectories, the originating location of parcels is more scattered, but the results are still consistent with the basic features revealed by the other two diagnostics.

scholarly journals Analisis Historis terhadap Corak Kesenian Islam Nusantara

2018 ◽  
Vol 3 (1) ◽  
pp. 125
Author(s):  
Nurrohim Nurrohim ◽  
Fitri Sari Setyorini
Keyword(s):  
Cultural Heritage ◽  
Analytical Method ◽  
Armed Forces ◽  
The Other ◽  
Islamic Art ◽  
Islamic Culture ◽  
Combination Of Theories ◽  
Long Time ◽  
History Of ◽  
Different Characteristics

The history of Islamic development in Indonesia has different characteristics compared to other Islamic regions such as Turkey, India, Egypt, Syria, and Morocco. The journey of Islam in Indonesia brings different colors and patterns that distinguish it from other Islamic regions. This happens because Islam is spreaded in the archipelago peacefully and in a gradual long time, unlike the other Islamic regions islamization which is not infrequently through the power of the armed forces. This article will explain the results of Islamic interaction with society who previously embraced Hinduism, Buddhism and animist beliefs dynamism in the form of Islamic Nusantara arts. The analytical method used in this paper is a combination of theories of acculturation and assimilation of Nusantara culture and Islamic culture. The combination of Nusantara culture and Islamic culture produces an Islamic art with the uniqueness of Nusantara without eliminating the elements of the old culture. The form of pre-Islamic Nusantara cultural heritage with the Islamic culture can be found in the architecture of mosques, Arabic Malay script, literary arts, painting and sculpture.

LES Simulations of Rotating Two-Pass Ribbed Duct With Coriolis and Centrifugal Buoyancy Forces at Re=100,000

2016 ◽  
Author(s):  
Cody Dowd ◽  
Danesh Tafti
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Large Eddy Simulations ◽  
The Other ◽  
Coriolis Forces ◽  
Flow And Heat Transfer ◽  
Large Eddy ◽  
Buoyancy Forces ◽  
First Pass ◽  
Duct Geometry

The focus of this research is to predict the flow and heat transfer in a rotating two-pass duct geometry with staggered ribs using Large-Eddy Simulations (LES). The geometry consists of a U-Bend with 17 ribs in each pass. The ribs are staggered with an e/Dh = 0.1 and P/e = 10. LES is performed at a Reynolds number of 100,000, a rotation number of 0.2 and buoyancy parameters (Bo) of 0.5 and 1.0. The effects of Coriolis forces and centrifugal buoyancy are isolated and studied individually. In all cases it is found that increasing Bo from 0.5 to 1.0 at Ro = 0.2 has little impact on heat transfer. It is found that in the first pass, the heat transfer is quite receptive to Coriolis forces which augment and attenuate heat transfer at the trailing and leading walls, respectively. Centrifugal buoyancy, on the other hand has a bigger effect in augmenting heat transfer at the trailing wall than in attenuating heat transfer at the leading wall. On contrary, it aids heat transfer in the second half of the first pass at the leading wall by energizing the flow near the wall. The heat transfer in the second pass is dominated by the highly turbulent flow exiting the bend. Coriolis forces have no impact on the augmentation of heat transfer on the leading wall till the second half of the passage whereas it attenuates heat transfer at the trailing wall as soon as the flow exits the bend. Contrary to phenomenological arguments, inclusion of centrifugal buoyancy augments heat transfer over Coriolis forces alone on both the leading and trailing walls of the second pass.

Do Twitter phenomena check-in popular venues on Foursquare too?

2018 ◽  
Vol 46 (3) ◽  
pp. 137-146
Author(s):  
Aysun Bozanta ◽  
Birgul Kutlu
Keyword(s):  
Clustering Analysis ◽  
Design Methodology ◽  
Business Owners ◽  
Marketing Strategies ◽  
The Other ◽  
Shopping Mall ◽  
Content Type ◽  
History Of ◽  
Twitter Users ◽  
Different Characteristics

Purpose The purpose of this study is to figure out the visiting behaviors of the users who have different characteristics on Twitter. Design/methodology/approach The visit history of users who share their Foursquare check-ins on Twitter and the characteristics of visited venues (category, check-in count, tip count, like count, rating, and price tier) was collected with Foursquare API. In addition, the number of followers, friends, tweets and favorite-count were collected via Twitter API. First, users were clustered according to their Twitter related attributes. After that, profiling was applied on clusters according to the characteristics of the venues that were visited by the users. Findings Clustering analysis generated three clusters, namely, ordinary, talkative and popular. For each cluster, the visited venues were investigated according to the price classification, check-in, like, tip counts and the categories. The users in ordinary class prefer cheaper venues rather than talkative and popular users. On the other hand, popular users prefer the venues with the highest average number of check-ins, likes and tip counts. The top two categories for all clusters are cafe and shopping mall. Originality/value This study differentiates from the other studies in the literature by examining the data from Twitter with clustering and profiling these clusters with Foursquare data to understand venue preferences of Twitter users having various characteristics. The findings of this study will provide new insights for business owners to understand the customers more comprehensively and design better marketing strategies.

scholarly journals An Eco-poetic Approach to Architecture Across Boundaries

2019 ◽  
Author(s):  
Claudia Westermann
Keyword(s):  
Body Problem ◽  
Chinese Philosophy ◽  
Natural Sciences ◽  
Point Of View ◽  
The Other ◽  
Chinese Art ◽  
New Approach ◽  
Asian Philosophy ◽  
Long Time ◽  
History Of

As highlighted by the post-Cartesian discourse across philosophical schools, Western thought had been struggling for a long time with conceiving interconnectedness. The problematic of Western dualism is most apparent with the so-called mind-body problem, but the issue does not only relate to the separation of body and mind but also the separation of living beings from their environments. Asian philosophy, on the other hand, has had a long history of thinking relations. The paper argues that an architectural philosophy that is open for a dialogue with Asian views would allow for a new approach to conceptualising the interconnectedness of minds, bodies, environments, and cultures. Linking Asian and Western aesthetics with a discourse on ecology, and setting it into dialogue with contemporary theories of architecture, the paper also refers torecent research on embodiment that is engaging from a new point of view with the natural sciences, and that appears to confirm positions of traditional Chinese philosophy. Reconsidering traditional Chinese art and aesthetics, the paper suggests, could initiate a new eco-poetic way of thinking the built environment and its design in favour of a future that is more than smart.

scholarly journals Theorising Order in the Shadow of War. The Politics of International Legal Knowledge and the Justification of Force in Modernity

2020 ◽  
Vol 22 (2-3) ◽  
pp. 218-245
Author(s):  
Hendrik Simon
Keyword(s):  
International Law ◽  
The Other ◽  
The Political ◽  
Law And Politics ◽  
State Practice ◽  
Long Time ◽  
History Of ◽  
History Of International Law ◽  
Modern War ◽  
War Discourse

Abstract The History of International Law lacks systematic studies on the link between legal scholars and practices of justifying war. This missing analytical link has for a long time given the impression that legal scholars describe ‘state practice’ in an ‘objective’, unpolitical way. Contradicting this impression, the article turns to the politics of legal scholars in the genesis of the modern war discourse. It reflects on the fateful entanglement of violence, law and politics, but nevertheless distinguishes between ‘objective’ and ‘political’ scholarship on the basis of Hans Kelsen’s work. Furthermore, the article illustrates the politicisability of legal scholars in selected historical cases of the ‘long 19th century’ (1789–1918). In all cases, two hearts pounded in lawyers’ chests: one scientific, the other political. As will be shown, the modern war discourse is shaped by a phenomenon that enables scholars to expand the intrinsic limits to the political instrumentalisation of law: ‘multi-normativity’.

The heart as an image of deification in mystical writing

2021 ◽  
Author(s):  
Magda Kučerková
Keyword(s):  
Mystical Experience ◽  
The Other ◽  
The Core ◽  
God's Love ◽  
Long Time ◽  
History Of ◽  
Theological Concept

The paper explores two phenomena powerful in life and interpretive terms: the heart and deification. One is understood as deeply human, the other as metaphysically appealing. It is a connection present in the history of Christian thinking for a long time, since the heart is perceived as an inner space where God meets man, in the most intimate form, which can only acquire the character of unification. Deification, as the experience of Christian mystics and mystics shows, basically means the deepest unification with God and activation of the change in God’s love. The issue examined in the paper is presented in the form of a brief guide to the theological concept of deification, and also the convergence of the historical and biblical views of the heart. The core of thinking about the topic is the interpretation of the heart as an inner image the (heart as the center, exchange of hearts) and the interpretation of the phenomenality of deification in the context of written mystical experience.

scholarly journals IV. On the structure of the red blood-corpuscle of oviparous vertebrata

1869 ◽  
Vol 17 ◽  
pp. 346-350
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
The Other ◽  
Red Cell ◽  
Blood Corpuscle ◽  
Fundamental Distinction ◽  
Long Time ◽  
History Of

The red blood-cell has been perhaps more frequently and fully examined than any other animal structure; certainly none has evoked such various and even contradictory opinions of its nature. But without attempting here any history of these, it may be shortly said that amongst the conclusions now, and for a long time past, generally accepted, a chief one is that a fundamental distinction exists between the red corpuscle of Mammalia and that of the other vertebrate classes—that the red cell of the oviparous vertebrata possesses a nucleus which is not to be found in the corpuscle of the other class. This great distinction between the classes has of late years been over and over again laid down in the strongest and most unqualified terms. But I venture to ask for a still further examination of this important subject.

Natural Materials to Absorb Water from Environment

2016 ◽  
Vol 835 ◽  
pp. 329-332
Author(s):  
Arturo Santamaría Ortega ◽  
Miguel Angel Rubio Toledo ◽  
Ricardo Victoria Uribe ◽  
Sandra Alicia Utrilla Cobos
Keyword(s):  
The Other ◽  
New Materials ◽  
Natural Materials ◽  
Natural Systems ◽  
Mexican Culture ◽  
Whole Plant ◽  
History Of ◽  
The Common ◽  
Different Characteristics ◽  
Agave Juice

In nature, there is a large number of materials to be discovered, all with different characteristics and for certain functions. In the case of plants, they are responsible for collecting, taking care and protect water naturally.In Mexico there are different plants of the cactus family, which catch and retain water for their existence, so some plants collect more volume of body water than they have. It is very important for this investigation.In Mexico and throughout the continent there is a common cactus or chumbera that easily adapts to the environment and very rampant in this country, so that its study and analysis makes it one of the most important natural systems for this research, because 95% of it is water and the other 5% is organic material.Later, the common Maguey or agave plant is analyzed, which is important for the history of ancient Mexico, this long before the Spaniards arrived in America. The agave juice and whole plant were an important part of Mexican culture [1], even today is used in many regions and is an important part of the economy in this country.Last but not least is the barrel cactus plant, which surprisingly lets us see how natural systems build structural and formal elements in order to the creation and configuration of new materials that can significantly help to collect water.

On the lifecycle of a shallow cumulus cloud: Is it a bubble or plume, active or forced?

2021 ◽  
Author(s):  
David M. Romps ◽  
Rusen Öktem ◽  
Satoshi Endo ◽  
Andrew M. Vogelmann
Keyword(s):  
Cloud Cover ◽  
Large Eddy Simulations ◽  
The Other ◽  
Doppler Lidar ◽  
Cumulus Cloud ◽  
Cumulus Clouds ◽  
Shallow Cumulus ◽  
Large Eddy ◽  
Stereo Cameras ◽  
Using Data

AbstractA cloud’s lifecycle determines how its mass flux translates into cloud cover, thereby setting Earth’s albedo. Here, an attempt is made to quantify the most basic aspects of the lifecycle of a shallow cumulus cloud: the degree to which it is a bubble or plume, and active or forced. Quantitative measures are proposed for these properties, which are then applied to hundreds of shallow cumulus clouds in Oklahoma using data from stereo cameras, a Doppler lidar, and large-eddy simulations. The observed clouds are intermediate between active and forced, but behave more like bubbles than plumes. The simulated clouds, on the other hand, are more active and plume-like, suggesting room for improvement in the modeling of shallow cumulus.

scholarly journals Sensitivities in Large-Eddy Simulations of Mixed-Phase Arctic Stratocumulus Clouds Using a Simple Microphysics Approach*

2015 ◽  
Vol 143 (11) ◽  
pp. 4393-4421 ◽  
Author(s):  
Colleen M. Kaul ◽  
João Teixeira ◽  
Kentaroh Suzuki
Keyword(s):  
Size Distribution ◽  
Surface Fluxes ◽  
Heat Fluxes ◽  
Large Eddy Simulations ◽  
Mixed Phase ◽  
Arctic Clouds ◽  
Surface Heat Fluxes ◽  
Large Eddy ◽  
Stratocumulus Clouds ◽  
Basic Features

Abstract Arctic mixed-phase stratocumulus clouds are maintained by feedbacks between microphysical and dynamical phenomena, but the details of these interactions are incompletely understood. Although large-eddy simulations are a promising means of elucidating microphysics–turbulence relationships, the use of sophisticated microphysical schemes complicates analysis of their results. Here, the ability of a simplified one-moment scheme to capture basic features of this cloud type is investigated through simulations based on Mixed-Phase Arctic Cloud Experiment (MPACE), SHEBA/FIRE-ACE, and Indirect and Semi-Direct Aerosol Campaign (ISDAC) intercomparison studies. The results of the simple scheme show reasonable agreement with liquid and ice water path predictions reported by models using schemes of similar or greater complexity. Additional tests are performed to evaluate the sensitivity of the results to three main parameters of the scheme: the snow and ice size distribution intercept parameters and the exponent appearing in the temperature-dependent phase-partition function, which is used to diagnose cloud condensate amounts. Sensitivities of the SHEBA and ISDAC cases, both of which have low surface heat fluxes and low precipitation rates, tend to be similar, while the MPACE case, with higher surface fluxes and precipitation rates, shows somewhat different trends. Results of all three cases are found to be sensitive to the snow size distribution intercept parameter, but this quantity can be adequately estimated using a recently developed diagnostic expression based on observations of Arctic clouds.

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