scholarly journals Bioacoustics of Isophya Dobrogensis, a Romanian Endemic Bush-Cricket (Orthoptera: Phaneropteridae)

2012 ◽  
Vol 55 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Ionuţ Ştefan Iorgu
Keyword(s):  
Clear Distinction ◽  
Acoustic Behavior ◽  
Acoustic Response ◽  
Male Song ◽  
First Time ◽  
Bush Cricket

Abstract The acoustic behavior of Isophya dobrogensis Kis, one of the 11 endemic Romanian Orthoptera species and one of the most vulnerable Orthoptera species in Europe, is described for the first time. Male song consists of long syllables with clear distinction between the opening hemisyllable and the closing one, comparable in structure with the audible signals of I. costata Brunner von Wattenwyl and I. longicaudata Ramme. Female acoustic response to male is one of the longest and most elaborated known within this genus.

A Comprehensive Analysis on the Structural–Acoustic Aspects of Various Functionally Graded Plates

2015 ◽  
Vol 07 (05) ◽  
pp. 1550072 ◽  
Author(s):  
N. Chandra ◽  
S. Raja ◽  
K. V. N. Gopal
Keyword(s):  
Power Law ◽  
Volume Fraction ◽  
Transmission Loss ◽  
Sound Radiation ◽  
Functionally Graded ◽  
Radiation Efficiency ◽  
Sound Power ◽  
Acoustic Behavior ◽  
Acoustic Response ◽  
Plate Velocity

The vibration, sound radiation and transmission characteristics of plates with various functionally graded materials (FGM) are explored and a detailed investigation is presented on the influence of specific material properties on structural–acoustic behavior. An improved model based on a simplified first order shear deformation theory along with a near-field elemental radiator approach is used to predict the radiated acoustic field associated with a given vibration and acoustic excitation. Various ceramic materials suitable for engineering applications are considered with aluminum as the base metal. A power law is used for the volume fraction distribution of the two constitutive materials and the effective modulus is obtained using the Mori–Tanaka homogenization scheme. The structural–acoustic response of these FGM plates is presented in terms of the plate velocity, radiated sound power, sound radiation efficiency for point and uniformly distributed load cases. Increase in both vibration and acoustic response with increase in power law index is observed for the lower order modes. The vibro–acoustic metrics such as root-mean-squared plate velocity, overall sound power, frequency averaged radiation efficiency and transmission loss, are used to rank these materials for vibro–acoustically efficient combination. Detailed analysis has been made on the factors influencing the structural–acoustic behavior of various FGM plates and relative ranking of particular ceramic/metal combinations.

WICKSELL ON THE AMERICAN CRISIS OF 1907

2011 ◽  
Vol 33 (2) ◽  
pp. 173-185 ◽  
Author(s):  
MAURO BOIANOVSKY
Keyword(s):  
Clear Distinction ◽  
Stabilization Policy ◽  
Cumulative Process ◽  
Credit Demand ◽  
First Time ◽  
Adequate Rate

The article discusses Knut Wicksell’s interpretation of the American crisis of 1907, which he presented in a piece published in Swedish in 1908. Wicksell advanced, probably for the first time in the literature, a clear distinction between the “solvency” and “liquidity” of banks, and discussed its implications for the interpretation of crises. Moreover, he called attention to a third desirable attribute of a bank: “flexibility”; that is, the ability to satisfy credit demand at an adequate rate of interest. Wicksell linked that with his better known concept of the cumulative process and the stabilization policy associated with it.

Should and ought: the rise of individually oriented modality in American English

1997 ◽  
Vol 1 (1) ◽  
pp. 3-23 ◽  
Author(s):  
John Myhill
Keyword(s):  
American English ◽  
The Other ◽  
Clear Distinction ◽  
Modal System ◽  
Common Opinion ◽  
Using Data ◽  
First Time

Using data drawn from twenty American plays written since 1889, this paper analyzes the usage of the weak obligation modals should and ought, which previous researchers (e.g. Coates, 1983; Leech, 1987; Palmer, 1987) have regarded as essentially synonymous. It is shown that there is a clear distinction between these words, with should expressing individual opinions and ought emphasizing a common opinion regarding the obligation in question. This use of obligation should does not occur in five plays written between 1889 and 1911, appearing for the first time in this database in a play written in 1926. The development of obligation should parallels other changes in the modal system which have taken place at the same time – as should has increased in frequency, so have the other individually-oriented modals got to and gonna, and as ought has declined in frequency, so have the other group-oriented modals must and will.

Historicizing Iron: Charles Driver and the Abbey Mills Pumping Station (1865-68)

2006 ◽  
Vol 49 ◽  
pp. 223-256
Author(s):  
Paul Dobraszczyk
Keyword(s):  
Cast Iron ◽  
Clear Distinction ◽  
Pumping Station ◽  
New Material ◽  
First Time ◽  
Historical References

Victorian architects and architectural theorists made a clear distinction between ‘building’ and ‘architecture’; for them, a building became architecture when historical references were invoked. The development of new constructive materials, in particular cast iron, directly challenged this perceived distinction. A new material possessed no history; how, therefore, could it be architectural? This paper will address this question by focusing on the treatment of cast iron in a particular building – the Abbey Mills pumping station, of 1865–68 (Fig. 3) – assessing, for the first time, the contribution of its architect Charles Driver (1832-1900). By also referring to Driver’s published writings, this paper will assess how he sought, in this building, to invest cast iron with architectural, and therefore historical, meaning.

New rare bivalved arthropods from the Lower Cambrian Chengjiang fauna, Yunnan, China

1999 ◽  
Vol 73 (1) ◽  
pp. 102-116 ◽  
Author(s):  
Hou Xian-Guang
Keyword(s):  
New Taxa ◽  
Lower Cambrian ◽  
Clear Distinction ◽  
New Type ◽  
First Time

Five new bivalved arthropods are described from the Lower Cambrian Chengjiang fauna, Yunnan, China. All of them are rare in the fauna, represented by one or two individuals among thousands of specimens. Four of the five new taxa are preserved with soft parts that show a clear distinction between them. The new taxa provide new important information concerning the soft bodied and limb characters of the early bivalved arthropods. A significant lesson is that, not knowing any soft parts, it is virtually impossible to place systematically a new type of bivalved carapace. It is often impossible even to tell if it is a crustacean or not. A second antenna in the shape of a “great appendage” is identified for the first time among the bivalved arthropods. The new taxa include representatives of the order Pectocaridida, the families Pectocarididae, Clypecarididae and Occacarididae, the genera and species Pectocaris spatiosa, Clypecaris pteroidea, Occacaris oviformis, Forfexicaris valida and Yunnanocaris megista.

Acoustic response of multi-stopband local resonance plate

2017 ◽  
Vol 31 (31) ◽  
pp. 1750295
Author(s):  
Yonggan Sun ◽  
Sheng Li ◽  
Ziquan Jiao
Keyword(s):  
Acoustic Radiation ◽  
Infinite Plate ◽  
Sound Radiation ◽  
Pressure Level ◽  
Acoustic Behavior ◽  
Acoustic Response ◽  
Local Resonance ◽  
Periodic Arrays ◽  
Radiation Behavior ◽  
Mass Spring

This paper primarily investigates the effect of damping ratios on the acoustic response of a multi-stopband local resonance plate consisting of two-dimensional periodic arrays of tuned mass-spring combinations attached to a thin homogeneous plate. A Floquet–Bloch approach is employed to demonstrate the stopbands for an infinite plate. In addition, the acoustic radiation behavior and average sound radiation pressure level of finite plates are computed. A continuous and much wider stopband with good vibro-acoustic behavior can be obtained when care is taken in the design of the damping ratios of local resonance plates.

scholarly journals First Record of Keeled Plump Bush-Cricket (Isophya costata Brunner von Wattenwyl, 1878) (Orthoptera, Tettigoniidae) in Slovakia

2017 ◽  
Vol 60 (2) ◽  
pp. 435-440 ◽  
Author(s):  
Soňa Nuhlíčková ◽  
Ján Svetlík ◽  
Anton Krištín
Keyword(s):  
Central Europe ◽  
Pannonian Basin ◽  
First Record ◽  
Habitats Directive ◽  
Community Interest ◽  
Southwestern Area ◽  
Northern Edge ◽  
First Time ◽  
Orthopteran Species ◽  
Bush Cricket

Abstract Keeled Plump Bush-cricket Isophya costata is one of ten orthopteran species of European Community interest (Annex II and IV of Habitats Directive), endemic to the Pannonian Basin in Central Europe. It was discovered for the first time in Slovakia in June 2017, in southwestern area of the country (the site Devínske jazero, 48.2722°N / 16.9404°E, 134 m a.s.l.), in continental flooded meadows. The presence of the species in this new site is copying the northern edge of its area. New data of species distribution, its habitat, accompanying orthopteran species are described and main threats and conservation measures of the species are discussed.

Bioacoustics characterization of some anatolian endemic and sub-endemic Katydids (Orthoptera; Tettigoniidae; Bradyporinae, Phaneropterinae and Tettigoniinae) 

Zootaxa ◽  
2019 ◽  
Vol 4603 (2) ◽  
pp. 289
Author(s):  
MEHMET SAİT TAYLAN ◽  
ABBAS MOL ◽  
HASAN SEVGİLİ ◽  
DENİZ ŞİRİN
Keyword(s):  
Black Sea ◽  
Additional Data ◽  
Field Trips ◽  
Acoustic Parameters ◽  
Black Sea Region ◽  
Male Calling ◽  
Species Specific ◽  
First Time ◽  
Bush Cricket

Seventeen endemic and three sub-endemic species belonging to three subfamilies of Tettigoniidae (Orthoptera: Bradyporinae, Phaneropterinae and Tettigoniinae) were sampled during field trips throughout different regions of Anatolia between 2015 and 2018 (except one taxon). Acoustic parameters of these 20 bush-cricket species affiliated to 12 genera (Apholidoptera, Bradyporus, Decticus, Eupholidoptera, Parapholidoptera, Pezodrymadusa, Pholidoptera, Polysarcus, Psorodonotus, Squamiana, Uvarovistia and Yalvaciana) have been described for the first time in this study. Bioacoustical analysis shows that male calling songs are species-specific for the genera Bradyporus, Parapholidoptera, Pholidoptera, Apholidoptera, Uvarovistia and Psorodonotus. However, there are no distinct differences among species of the genus Pezodrymadusa. Moreover, our additional data on genus Eupholidoptera indicate that there are some different song patterns within the genus. The song description of Uvarovistia zebra presented here is the second bioacoustics data on this genus. The acoustical analyses data support the morpho-species hypothesis of Psorodonotus suphani Taylan & Şirin, 2014, which is known from Süphan Mountain (Bitlis province, Eastern part of Turkey) and reject Kaya & Çıplak (2017), which recommended it as synonym to P. caucasicus (Fischer von Waldheim, 1846) (commonly known as a Black Sea Region species).

scholarly journals Song Description of Zubovski’s Bush-Cricket, Isophya Zubowskii (Orthoptera: Phaneropteridae)

2012 ◽  
Vol 55 (1) ◽  
pp. 57-63
Author(s):  
Ionuţ Ştefan Iorgu ◽  
Elena Iulia Iorgu
Keyword(s):  
Species Group ◽  
Sound Frequency ◽  
Calling Song ◽  
First Time ◽  
Bush Cricket

Abstract The bush-cricket Isophya zubowskii Bey-Bienko, 1954 was surveyed in the period 2002- 2012 in 11 locations from Romania. The calling song, described hereby for the first time, consists of a long series of syllables, each formed by 85-118 impulses and lasting for 236-319 ms in the populations near Iaşi, while the individuals from three other populations in Southern Romania produce shorter syllables, consisting of 74-105 impulses and, lasting for 182-251 ms. Sound frequency ranges in the interval 10-40 kHz, with highest peak at about 18-26 kHz. Based on the description of its calling song, we conclude that Isophya zubowskii belongs to the Isophya kraussii species group.

scholarly journals High-speed duetting – latency times of the female acoustic response within the bush-cricket genera Leptophyes and Andreiniimon (Orthoptera, Phaneropteridae)

ZooKeys ◽  
2018 ◽  
Vol 750 ◽  
pp. 45-58 ◽  
Author(s):  
Klaus-Gerhard Heller ◽  
Olga Korsunovskaya ◽  
Bruno Massa ◽  
Ionuț Ștefan Iorgu
Keyword(s):  
High Speed ◽  
Mutual Recognition ◽  
Species Recognition ◽  
Sympatric Species ◽  
Acoustic Response ◽  
Female Response ◽  
Male Song ◽  
The Family ◽  
Species Specific ◽  
Bush Crickets

To find a mate, male and female bush-crickets of the family Phaneropteridae typically engage in duets. The male sings and the female responds. For mutual recognition, the amplitude pattern of the male song and the species-specific timing of the female response have been shown to be very important. In the seven studied species, belonging to the generaLeptophyesandAndreiniimon, these duets are extremely fast and nearly completely in the ultrasonic range. The females produce very short sounds by fast closing movements of the tegmina. They respond with species-specific delays of 20 to 150 ms after the beginning of the male song. The different latency times are probably not important for species recognition, since in sympatric species they are quite similar.

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