scholarly journals Study of Ship Design Maninjau Lake Tourism by Using Catamaran Hull Type and Fiberglass Material

Teknomekanik ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 24-28
Author(s):  
Ar Trisyaldi ◽  
Purwantono Purwantono ◽  
Waskito Waskito ◽  
Primawati Primawati ◽  
Syahril Syahril
Keyword(s):  
Ship Design ◽  
Design Methods ◽  
Type Analysis ◽  
The Third ◽  
Efficiency And Effectiveness ◽  
Hull Design ◽  
Fiberglass Material ◽  
Dimension Ratio ◽  
Shape And Size

Maninjau lake uses ships designed in a simple way without significant innovation from time to time. This case is caused by design methods that are based on hereditary knowledge from  generations to generations, so that the ships that are made tend to have the same shape and size. Innovation is needed to get a higher level of efficiency and effectiveness on a ship. The innovation that needs to be done is the design of ships with a multi-hull shape or catamaran. The pre-design of the catamaran hull is based on using the comparation method as the dimension ratio of the ship, so that the dimensions of the ship are LWL = 4 m; LPP = 3.96 m; B = 1.7 m; B1 = 0.36 m; D = 0.7 m; d = 0.307 m. After that, testing the resistance (resistance) while determining the amount of Power needed. The next step is to analyze Stability and Seakeeping to determine the efficiency and effectiveness of the hull type. Analysis carried out on this type of hull was applied to several models, then the best hull design was found. Each design is distinguished by hull shape, but has the same displacement which is equal to 0.448 tons. The first model of the catamaran hull with the type of Flat Inside Symmetry; second with the type of symmetry Flat Outside; and the third type with gastric Asymmetry.

Polystoma nacialtuneli n. sp. (Monogenea: Polystomatidae) from the eastern spadefoot, Pelobates syriacus (Pelobatidae) in Turkey

2011 ◽  
Vol 86 (1) ◽  
pp. 104-112 ◽  
Author(s):  
H.S. Yildirimhan ◽  
L.H. Du Preez ◽  
O. Verneau
Keyword(s):  
Urinary Bladder ◽  
Phylogenetic Relationships ◽  
Internal Transcribed Spacer ◽  
Parasite Species ◽  
The Third ◽  
Shape And Size ◽  
Pelobates Cultripes

AbstractPolystoma nacialtuneli n. sp. is described from the urinary bladder of the eastern spadefoot, Pelobates syriacus from Turkey. This is the fifth polystome species known from Turkey and the third species in Pelobates. We show that this new parasite species can be distinguished from other polystome species in the area by a combination of characteristics, including parasite size and the shape and size of the hamuli. Polystoma pelobatis from Pelobates cultripes has a pair of well-developed hamuli, while P. fuscus from Pe. fuscus characteristically has a pair of underdeveloped hamuli barely larger than the marginal hooklets. Polystoma nacialtuneli n. sp. has well-developed hamuli that vary significantly in shape. Phylogenetic relationships of P. nacialtuneli n. sp. within Polystoma, supplemented with molecular divergences estimated from internal transcribed spacer 1 (ITS1) sequences, indicate that they are well separated from their closest relatives, i.e. P. fuscus and P. pelobatis from Pe. fuscus and Pe. cultripes, respectively.

scholarly journals Evaluation of design methods for side resistance only rock socketed piles

2021 ◽  
Author(s):  
Ian Johnston
Keyword(s):  
Design Methods ◽  
Full Scale ◽  
The Other ◽  
Total Resistance ◽  
The Third ◽  
Components Of Resistance ◽  
Side Resistance

The ability of three methods to predict the load-settlement response of rock socketed piles was examined in a recent paper. The piles considered were complete piles in which both the side and base of the piles contribute to the total resistance. For a range of reasons, it is sometimes necessary to consider rock socketed piles for which the resistance is provided only by the side of the socket. This paper extends the earlier paper by comparing predictions for side resistance only piles with the load-settlement response of a suite of full-scale side resistance only pile tests. Only two of the methods of the earlier paper are used for this comparison as the third method could not decouple the two components of resistance. It is demonstrated that one of the methods produces reasonable predictions of performance whereas the other appears to underpredict performance.

scholarly journals Polityka innowacyjna i Narodowy System Innowacji w Polsce

2015 ◽  
pp. 59-76
Author(s):  
Joanna Stryjek
Keyword(s):  
Innovation Policy ◽  
State Intervention ◽  
Point Of View ◽  
The Third ◽  
Support For Innovation ◽  
Wide Range ◽  
Factor Conditioning ◽  
Efficiency And Effectiveness ◽  
National System Of Innovation ◽  
Innovation Processes

The purpose of this article is analysis of innovation policy, understood as a factor conditioning the institutional and organizational efficiency and effectiveness of the National System of Innovation (NSI), suggesting desirable areas of state intervention in relation to the NSI in Poland. The article consists of four parts. The first part presents the stages in the development of innovation policy and recognizes the links between innovation policy and the development of research on innovation processes. The second part presents potential areas of state intervention and the main instruments used within the framework of innovation policy. The third part presents the theory of NSI which – while referring to the links between various NSI elements – indicates a wide range of potential possibilities of indirect support for innovation processes. The last part identifies the areas of state intervention which are important from the point of view of Poland’s NSI development.

The Project 21 Smart Product Model: A New Paradigm for Ship Design, Cost Estimation, and Production Planning

2002 ◽  
Vol 18 (02) ◽  
pp. 73-78 ◽  
Author(s):  
Jonathan M. Ross ◽  
Tobin R. McNatt ◽  
George Hazen
Keyword(s):  
Production Planning ◽  
Cost Estimation ◽  
Ship Design ◽  
New Paradigm ◽  
Product Model ◽  
Design Work ◽  
Contract Negotiations ◽  
Smart Product ◽  
Hull Design ◽  
Design Cost

Pre-production ship design, cost estimation and production planning are traditionally carried out in U.S. shipyards through a process of extensive design work, followed by contacting multiple vendors, and coupled with production planning. This process has long been recognized as time consuming and expensive. In an effort to save time and cost, a number of synthesis models have been developed. These models are collections of trends gleaned from similar vessels. The trends, when combined, provide an estimate for initial discussions with customers, but the estimate is not sufficiently accurate for contract negotiations. An alternative is for shipyards to offer stock designs on which contract design, costing, and production planning work have already been carried out. However, most customers demand designs tailored to their particular needs. The MARITECH ASE Project 21 Smart Product Model (SPM) provides a new paradigm to meet the needs of shipyards and their customers. The SPM is initiated with a parent ship for which design, cost and production data are well known. The parent is then modified to match the customer ship's specifications. The SPM incorporates the modifications by means of an integrated set of first principles programs (e.g., FastShip for hull design) and databases (e.g., of various makes and models of main propulsion engines). The SPM provides shipyards with the speed of the synthesis models, the accuracy of the stock ship approach, and substantially improves the shipyards' competitive position.

Description of Ruehmaphelenchus thailandae n. sp. (Nematoda: Aphelenchoididae) found in dunnage from Thailand

Nematology ◽  
2010 ◽  
Vol 12 (6) ◽  
pp. 869-876 ◽  
Author(s):  
Jianfeng Gu ◽  
Jiangling Wang
Keyword(s):  
New Species ◽  
Body Length ◽  
Rflp Pattern ◽  
Species Status ◽  
Separate Species ◽  
Lateral Field ◽  
The Third ◽  
Female Tail ◽  
Males And Females ◽  
Shape And Size

AbstractRuehmaphelenchus thailandae n. sp., isolated from deciduous dunnage from Thailand, is described and figured. The new species is characterised by the relatively stout body (a = 28.6 and 27.6 for males and females, respectively), three lines in the lateral field, spicules relatively small (12.0-13.3 μm) with weakly developed condylus and rostrum, bursa absent, vulva located at 79.5% of body length, vulval lips slightly swollen, length of post-uterine branch more than half of vulva to anus distance, female tail conoid, ca two anal body diam. long and with a broad terminal process up to 12 μm long. The new species is the third known for the genus. It can be distinguished from R. martinii and R. asiaticus mainly by the different shape and size of its spicules and different shape of the female tail terminus. The separate species status is also supported by ITS-RFLP pattern. Additional measurements of paratype R. asiaticus are appended.

DESCRIPTIONS OF LARVAL ARRENURUS BARTONENSIS COOK, ARRENURUS BIRGEI MARSHALL, ARRENURUS NEOBIRGEI COOK, AND ARRENURUS ROTUNDUS MARSHALL (ACARI: HYDRACHNIDIA; ARRENURIDAE)

1990 ◽  
Vol 122 (1) ◽  
pp. 77-91 ◽  
Author(s):  
Bruce P. Smith
Keyword(s):  
Excretory Pore ◽  
The Other ◽  
Dorsal Plate ◽  
The Third ◽  
First Time ◽  
Shape And Size

AbstractLarvae of Arrenurus bartonensis Cook, Arrenurus birgei Marshall, Arrenurus neobirgei Cook, and Arrenurus rotundus Marshall are described for the first time. Larvae of A. rotundus can be distinguished reliably from the other three by differences in morphology. Larvae of A. bartonensis, A. birgei, and A. neobirgei are very similar, but can be separated by comparing shape and size of the excretory pore plate, and by measurements of the dorsal plate and the tarsus of the third leg.

I.—The Genus Primula: Section Farinosae

1944 ◽  
Vol 61 (1) ◽  
pp. 1-69 ◽  
Author(s):  
W. Wright Smith ◽  
H. R. Fletcher
Keyword(s):  
Detailed Analysis ◽  
Fundamental Difference ◽  
Point Of View ◽  
Cytological Evidence ◽  
The Third ◽  
The Past ◽  
Cytological Data ◽  
Representative Species ◽  
Valid Evidence ◽  
Shape And Size

The section Farinosae was first denned by Pax (1) in 1889 with citation of P. farinosa and P. sibirica as representative species. He published at the same time his section Auriculatae. The only distinction given of apparent moment between the two sections is the shape and size of the capsule. In Auriculatae it is globose and included in the calyx, while in Farinosae it is cylindric and more or less exserted. This diagnostic character was found to be unsatisfactory, with the result that in 1905 Pax (2) in his Monograph combined the two sections under Farinosae. There was still an undercurrent of opinion that a division was justified, and at the Third Primula Conference in 1913 Bayley Balfour (3) reverted to the previous arrangement without, however, any stated reasons. At the Fourth Primula Conference held in 1928 the sections of the genus were reviewed by Smith and Forrest (4), who again subordinated Auriculatae to Farinosae. In 1932 appeared Bruun's Cytological Studies in Primula (5), with a detailed analysis of the species then available in cultivation. Here valid evidence was given that certain species assessed in the past as within Auriculatae did differ cytologically from the general run of species included without question in the Farinosae. But the cytological evidence taken alone tends to associate these Auriculatae with other species quite dissimilar from the broad morphological point of view. The problem is referred to again by Wright Smith (6) in his Hooker Lecture, where it is admitted that the cytological data do support the view that there is a degree of fundamental difference between the two sections. But the difficulty still remains of finding satisfactory macroscopic distinctions. The present authors have come to the conclusion that it is better to keep both under the general heading Farinosae rather than to separate them by slender and often misleading characters supported as these may be by the cytology. In any case much remains to be done on the cytological side, as the majority of the species are yet to be analysed, and for general purposes the incorporation of the cytological data in an analytical key would not be satisfactory.

New Ship Technology and Design

2008 ◽  
Vol 42 (1) ◽  
pp. 21-25 ◽  
Author(s):  
John F. Bash
Keyword(s):  
Human Factors ◽  
Ship Design ◽  
Building Industry ◽  
Design Change ◽  
Ship Building ◽  
Security Issues ◽  
The Past ◽  
Hull Design ◽  
Fuel Costs ◽  
Technology And Design

The ship building industry is experiencing a wave of new ship technology and design. Historically, ship design has been slow to change. For example, the mono-hull design has been around for centuries. Propulsion has evolved as technology advanced but we see ship owners as very conservative in embracing new advances. In the past 20 years this trend has shifted as new designs begin to appear. This article explores some of these changes and the drivers that are causing this shift. Clearly, as technology advances and uses for ships expand, the ship building industry design is evolving. New issues have come to the fore and have accelerated the design change. These drivers include fuel costs, reduced crewing, speed, security issues, pollution regulations, stealth needs, human factors, safety, geopolitical changes, multi-mission requirements, and acoustic quietness. Examples of military, commercial, and research ships are discussed.

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