scholarly journals Analysis of installation of ducted propeller (kort nozzle) on cargo ship after maintenance

2019 ◽  
Vol 8 (4) ◽  
pp. 611
Author(s):  
Romie Oktovianus Bura ◽  
I Nengah Putra Apriyanto ◽  
Arica Dwi Susanto
Keyword(s):  
International Trade ◽  
Air Bubbles ◽  
Type B ◽  
Speed Increase ◽  
Ducted Propeller ◽  
Ship Maintenance ◽  
The Difference

The country of Indonesia is a country of export and import of international trade goods. A cargo ship is a type of ship that carries cargo from one port to another. To meet the needs of international trade must carry out various patterns of ship maintenance by carrying out maintenance. The problem is that conventional propellers are currently installed, at high rotations there can be cavitation of air bubbles around the propeller which decreases propeller efficiency. To improve the conditions above, a Ducted Propeller was installed. From the matching calculations that have been done, the propeller that suits the needs of the ship is a Ka 3.65 type using a ducted propeller. By using a Ka 3.65 type propeller. The power needed is 2239.99 kW the efficiency that can be achieved is 55%, sfoc 214 g / kW, and the speed of the ship will be 16.09 knots at 100% rotation of the propeller, and at 85% the power needed 1375.84 kW, sfoc 214 g / kW, speed reaches 9.88 knots. The difference in speed between conventional blades with type B 4.55 with type Ka 3.65 that uses a cort nozzle is 16.09 knots-13.05 knots = 3.04 knots. Or you can experience a speed increase of (3.04 / 13.05) x100 = 23.29. 

Documentary credit between international rules and norms and Iraqi trade law

2021 ◽  
Author(s):  
Hardi Tofiq
Keyword(s):  
International Trade ◽  
The Other ◽  
Global Level ◽  
Financial Systems ◽  
Trade Law ◽  
The Difference ◽  
Credit Contracts

The difference in the countries to which both the seller and the buyer belong in the commercial exchanges has increased the discrepancy in the laws and rules that govern the conduct of the most important banking count approved for the settlement of such exchanges, which is the documentary credit process, as a result of the different economic, banking and financial systems from the other, so there was a need to unify These customs and customs are in a unified form, which is called today the unified rules and customs of documentary credit, which are applied to the conduct of documentary credit contracts at the global level. Therefore, we consider it necessary to make an amendment in the Iraqi law regarding the organization of the documentary credit process, because the articles related to the provisions of documentary credits are not sufficient in themselves to indicate all the problems that may result from it due to developments in international trade.

An Era of Transition

2010 ◽  
pp. 255-262
Author(s):  
Yaron Harel
Keyword(s):  
International Trade ◽  
Social Structure ◽  
Mediterranean Sea ◽  
Persian Gulf ◽  
The Political ◽  
Jewish Communities ◽  
Economic Changes ◽  
The Difference ◽  
Leadership And Organization ◽  
The Persian Gulf

This chapter examines the Jewish minority in Syria in 1840, when the Damascus affair took place and ended when economic disaster overtook Damascus Jewry. It highlights profound changes in Ottoman imperial rule and society in Syria from 1840, when Ottoman rule was reinstated. It also analyses shifts in Jewish society against the broad background of the political, social, and economic changes that took place in Syria. The chapter looks at the difference between the Jewish communities of Damascus and Aleppo with regard to social structure, economic endeavour, communal leadership and organization, and education. It recounts Jewish merchants in both Damascus and Aleppo in 1840 that engaged in international trade via the camel caravans that travelled between the Persian Gulf and the Mediterranean Sea.

Group I Clostridium botulinum Strains Show Significant Variation in Growth at Low and High Temperatures

2009 ◽  
Vol 72 (2) ◽  
pp. 375-383 ◽  
Author(s):  
KATJA HINDERINK ◽  
MIIA LINDSTRÖM ◽  
HANNU KORKEALA
Keyword(s):  
Growth Rates ◽  
Significant Variation ◽  
Clostridium Botulinum ◽  
Maximum Growth ◽  
Type B ◽  
Strain Variation ◽  
Optimum Growth Temperature ◽  
Group I ◽  
Botulinum Type ◽  
The Difference

The minimum and maximum growth temperatures of 23 group I Clostridium botulinum strains of the toxin types A, AB, B, and F were determined. Moreover, the maximum growth rates at 20, 37, and 42°C of the same strains were recorded. The minimum growth temperatures varied from 12.8 to 16.5°C, whereas the maximum growth temperatures showed even wider variation, from 40.9 to 48.0°C. At 20 and 37°C, a twofold difference in maximum growth rates between the slowest and the fastest growing strains was found; at 42°C the difference was more than 30-fold. As expected, all strains grew significantly slower at 20°C than at 37°C. However, eight type B strains grew substantially faster at 42°C than they did at 37°C. These findings indicate that the optimum growth temperature for some group I C. botulinum type B strains is higher than the temperature of 37°C that is generally accepted. A significant correlation between maximum growth rates at 42°C and maximum growth temperatures was found for type B and F strains, whereas for type A strains no such correlation could be found. Strain variation was particularly high for the type B strains, reflecting the wide genetic diversity of this toxin type. The significant variation between strains of group I C. botulinum may have an impact on inoculation studies and predictive modeling when assessing the safety of foods.

scholarly journals Responses of Neurons in the Medial Superior Temporal Visual Area to Apparent Motion Stimuli in Macaque Monkeys

2007 ◽  
Vol 97 (1) ◽  
pp. 272-282 ◽  
Author(s):  
Anne K. Churchland ◽  
Xin Huang ◽  
Stephen G. Lisberger
Keyword(s):  
Firing Rate ◽  
Apparent Motion ◽  
Target Speed ◽  
Speed Increase ◽  
Mt Neurons ◽  
Medial Superior Temporal ◽  
Smooth Motion ◽  
The Difference ◽  
Mst Neurons ◽  
Vector Averaging

Monkeys fixated a stationary spot during presentation of dot textures that moved in apparent motion defined by the spatial and temporal separations, Δx and Δt, between successive flashes of each dot. For each neuron, we assessed the speed tuning for smooth motion (Δt = 2 or 4 ms) at speeds ≤128°/s and the effect of varying the value of Δt at speeds of 16 and 32°/s. Many medial superior temporal (MST) neurons, like middle temporal (MT) neurons, were tuned for the speed of smooth motion and showed decreases in firing rate as the value of Δt increased at a constant speed. A subset of MST neurons, however, showed monotonically increasing firing rates as a function of smooth stimulus speed and responses to apparent motion that paralleled a previously discovered illusion where estimates of target speed increase with the value of Δt. Opponent firing rate, defined as the difference between responses for motion in the preferred and opposite directions, peaked at values of Δt that were consistent with the behavioral illusion. Comparison with a new sample of MT neurons recorded with the same stimuli failed to reveal comparable effects. Attempts to map the population responses in MT and MST onto the behavioral illusion of increased speed succeeded by averaging the opponent response across MST neurons, but only by applying vector averaging to determine the preferred speed of the most active MT neurons. We suggest that a vector-averaging computation transforms MT's place code for target speed into the rate code of some MST neurons.

Fortune and Fairness in Global Economic Life

2017 ◽  
Vol 14 (3) ◽  
pp. 270-290
Author(s):  
Aaron James
Keyword(s):  
International Trade ◽  
Comparative Advantage ◽  
Low Income ◽  
Raw Materials ◽  
Current System ◽  
Economic Life ◽  
Luck Egalitarianism ◽  
Central Importance ◽  
Success Stories ◽  
The Difference

This paper develops John Rawls’s famous objection to the system of natural liberty as against the contemporary system of international trade. Even as “dynamic” policies have proven successful in several recent development success stories, the current system enforces a “static,” laissez-faire system of comparative advantage that threatens to consign poorly-endowed countries to a low-productivity, low-income destiny in agriculture and raw materials. I discuss two very different fairness arguments in favor of allowing and encouraging “dynamic,” pro-development polices: an argument from “structural equity” and an argument from “equity of fortune.” I suggest that the former is of more central importance, and that the difference between the two kinds of fairness argument shows why Rawls’s original objection to the (domestic) system of natural liberty does not imply “luck egalitarianism.”

Effects of baclofen on the Hering-Breuer inspiratory-inhibitory and deflation reflexes in rats

1998 ◽  
Vol 274 (2) ◽  
pp. R462-R469 ◽  
Author(s):  
Erin Seifert ◽  
Teresa Trippenbach
Keyword(s):  
Aminobutyric Acid ◽  
Type B ◽  
Rapid Adaptation ◽  
Inspiratory Time ◽  
Airway Occlusion ◽  
Acid Type ◽  
Tracheal Pressure ◽  
The Difference ◽  
Respiratory Phases ◽  
Stimulation Of

The objective of this study was to evaluate effects of baclofen, a γ-aminobutyric acid type B (GABAB) receptor agonist, injected into the nucleus of the solitary tract, on the Hering-Breuer inspiratory-inhibitory (Ti-inhibitory) and deflation reflexes in urethan-anesthetized adult Wistar rats ( n = 7). The Ti-inhibitory reflex was estimated from changes in peak amplitude of the integrated diaphragmatic electromyogram and inspiratory time (Ti) provoked by airway occlusion at end expiration. The deflation reflex was evaluated from changes in Ti and expiration (Te) of the first two breaths (Ti-1, Te-1 and Ti-2, Te-2) immediately after a decrease in tracheal pressure (Ptr). Under control conditions, airway occlusion at end-Te prolonged Ti (66 ± 5%; mean ± SE) and the following Te (54 ± 11%). Decreases in Ptr, from −2 to −5 cmH2O, evoked an increase in Ti and shortening of Te of both breaths. Both effects were Ptr dependent, and Ti-1 and Te-1 differed from Ti-2 and Te-2, suggesting a rapid adaptation to the stimulus. At Ptr of −5 cmH2O, Ti-1 and Ti-2 increased by 30 ± 2 and 43 ± 6%, respectively, and Te-1 and Te-2 decreased by 53 ± 4 and 33 ± 7%, respectively. During unloaded breathing, 60 pmol baclofen prolonged Ti by 120 ± 11% and left Te unaffected. Baclofen abolished vagally mediated changes in Te. On the other hand, the Ti increases caused by either airway occlusion (24 ± 8%) or Ptr of −5 cmH2O (Ti-1; 16 ± 5%) were still significant, but Ti-1 and Ti-2 were not different. A GABAB receptor antagonist, CGP-35348 (2.8 nmol), reversed these effects of baclofen. These results imply that stimulation of GABAB receptors attenuates but does abolish vagally mediated control of Ti. The difference in effects of baclofen on the central and vagal control of Ti and Te suggests different distribution of GABAB receptors in neuronal networks controlling each of these respiratory phases.

The Lobe Structure in Ice Accreted on an Aluminium Conductor in The Presence of a Dc Electric Field

1983 ◽  
Vol 4 ◽  
pp. 228-235 ◽  
Author(s):  
Luan C. Phan ◽  
Jean-Louis Laforte ◽  
Du D. Nguyen
Keyword(s):  
Electric Field ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Air Bubbles ◽  
Experimental Conditions ◽  
Charged Droplets ◽  
Water Drops ◽  
The Difference ◽  
Negative Electric Field ◽  
Corona Wind

Supercooled droplets of 38 μm mean volume diameter are accreted on a smooth aluni mum cylinder of 3.15 cm in diameter in order to study the effect of an electrostatic field upon ice formation on a power-line conductor. The results obtained show that ice grown in the presence of an applied negative field of 15 kV cm−1 exhibits a cusped-lobe structure characterized by surfacial outward knobs, convex rings of fine air bubbles and radial lines of large air bubbles; in the same conditions, a positive electric field of 15 kV cm−1 does not produce such lobe features. On the other hand, accretion tests performed in the absence of an electric field with a 33 μm droplet spectrum show that the well-developed cusped-lobe structure appears in ice at low ambient temperature and air velocity. In the present experimental conditions, the formation of cusped lobes observed in the presence of a negative electric field could be explained by a decrease in the temperature of the deposit due to a reduction of impact velocity of the charged droplets and/or an increase in the local heat-transfer coefficient at the surface of the ice accretion. Corona wind from ice points, always in the opposite direction to the impinging droplets, may also reduce their impact velocities. In addition, corona wind and roughness of the surface may contribute to a better evacuation of the latent heat and thus decrease the deposit temperature. The difference between the effects of a negative DC field and those of a DC positive field of the same strength comes from a stronger ionization intensity and/or a stronger deformation of water drops in the negative electric field.

Assessing the trade of digitisable goods: implications for South Asia

2020 ◽  
Vol 48 (1) ◽  
pp. 63-78 ◽  
Author(s):  
Rahul Nath Choudhury
Keyword(s):  
International Trade ◽  
South Asia ◽  
South Asian ◽  
Policy Decision ◽  
Policy Framework ◽  
Content Type ◽  
Asian Region ◽  
The Us ◽  
The Difference ◽  
South Asian Region

PurposeThe technological progress has made it possible to transform a physical good into a digital one. This development has influenced international trade and a large volume of these digitisable items are increasingly crossing national boundaries. Goods like books, music and games which were earlier traded physically are now traded online. Digitalisation is reducing the cost of engaging in international trade, connecting businesses and consumers globally, helping to diffuse ideas and technologies and facilitating the coordination of global value chains. The emerging avenues of trade and its format supplemented with fast and ever-changing technology have posed a serious challenge for the policymakers around the world. Policymakers are grappling with several issues regarding digital trade for quite a long time but failed to provide any solution. Institutions like WTO and OECD are also seized with this matter. Yet, we do not have any correct assessment of the potential volume of digital trade. Second, due to the moratorium signed in WTO countries are unable to impose any duty of digital trade. South Asian region which is a net importer of these items loses a huge amount of revenue. Hence, in this study, we make an attempt to assess the potential volume of digital trade in South Asia. The study further tries to estimate the possible loss of tax revenue incurred by this region during the last decade. For both South Asia and India the results for actual import figure are found to be less than the estimated value. A gap of around US$1 billion was found between the actual and estimated import of India, while for South Asia it was the US$ 7 billion.Design/methodology/approachFor estimation, the study largely follows Banga (2019) and extends the methodology further to estimate the tariff revenue loss. Following Banga (2019) the study identifies a list of goods that can be traded in both digitally or physically. In other words, a list of digitisable goods is prepared. Then their import by the South Asian region is measured. Then we examine the tariffs imposed by the individual South Asian countries on the physical trade of these items. The estimation is done by projecting the value of the global physical imports of digitisable products from 2011 to 2017 would have been without digitalisation and what the actual global imports are with digitalisation in this period. The difference between the two gives estimates of total digital imports by the region. The total physical imports of digitisable products in the period 2011–2017 are estimated applying the cumulative growth rate (CAGR) of regional imports of these products over the period 1998–2010. The difference between the estimated physical imports and the actual physical imports provides the estimates of digital imports. Finally, the summation of the tariffs for each of the items gives us the possible figure that the countries are losing by not imposing customs duties.FindingsThe study finds globally an estimated value of digitise items to be US$246 billion which is around the US$100 billion higher than the actual value of $147 billion during 2017. For both South Asian region and India estimated import is found to be higher than the actual value. The study estimated an import of $1 billion and $7 billion took place during 2017 in India and South Asia respectively.Originality/valueDigital trade is undoubtedly one of the highest debated topics in international trade forums. Experts from both academic and corporate discourse are seized with this matter. Policymakers around the globe are poised with this issue to develop a comprehensive policy framework which facilitates the growth of the sector and at the same time safeguard the interest of the stakeholders. South Asian nations like India, Bangladesh and Pakistan are also grappling with this. In this background, it becomes utmost important to estimate the loss that they are incurring to take an informed policy decision.

Price and Quantity Policies in a Simple Political Economy Framework

2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Sumeet Gulati
Keyword(s):  
Political Economy ◽  
International Trade ◽  
Pollution Tax ◽  
Policy Makers ◽  
Second Best ◽  
Full Control ◽  
The Difference ◽  
The Government ◽  
Price Distortions

Abstract The literature of the “second-best” demonstrated the difference between exogenous price and quantity distortions. However, it is not always realistic to assume that distortions are beyond the policy makers’ control. Are price and quantity distortions different even if they are endogenized using a political economy setting? In this paper, I postulate a government that uses trade and pollution policy to maximize a weighted welfare function where domestic producers get a higher weight than consumers. International trade is regulated by either a tariff or a quota, and pollution is regulated using a pollution tax. I find that if the government has full control on both trade and pollution policy, endogenously created quantitative distortions (quantitative restrictions) have the same effect as price distortions (tariffs).

scholarly journals What makes the difference between the natural course of a remaining type B dissection after type A repair and a primary type B aortic dissection?

2012 ◽  
Vol 41 (5) ◽  
pp. e110-e116 ◽  
Author(s):  
E. Krahenbuhl ◽  
S. Maksimovic ◽  
G. Sodeck ◽  
D. Reineke ◽  
F. Schoenhoff ◽  
...  
Keyword(s):  
Aortic Dissection ◽  
Type A ◽  
Natural Course ◽  
Type B ◽  
Type B Aortic Dissection ◽  
Type B Dissection ◽  
The Difference ◽  
Primary Type
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