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11:37 IWF (Göttingen) English 1978

Life History of Ectocarpus siliculosus (Phaeophyta)

Vegetative reproduction and alternation of generations in the brown alga under laboratory conditions: formation of plurilocular sporangia, liberation and germination of mitospores, growth to sporophyte generation; formation of unilocular sporangia, liberation and germination of meiospores, formation of plurilocular gametangia, release and copulation of gametes. Microcinematography, partly in time-lapse, animated graphics of life cycle.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: English
08:12 IWF (Göttingen) German 1978

Einstufige Schubzentrifuge - Trennung von Feststoff und Flüssigkeit unter verschiedenen Betriebsbedingungen

Beim Zentrifugieren einer Suspension werden Kuchenbildung und Transport unter Variation der Trommellänge, Drehzahl, Schubfrequenz und Vorschublänge mit stroboskopischen Filmaufnahmen gezeigt.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
06:36 IWF (Göttingen) German 1978

Einstufige Schubzentrifuge - Gestörte Trennung von Feststoff und Flüssigkeit unter verschiedenen Betriebsbedingungen

A homogeneous distribution of the solid cake in the barrel will be prevented by an unsteady and poorly adapted supply of suspension to the running conditions. Shown will be the following particularities at the formation and the transport of the cake: the obstucted starting process, the disturbed areas in the form of a channel caused by four bolts of a distance cage, flooding an spitting. By means of synchronization device and a stroboscopical lighting the rotation barrel of the centrifuge apparently comes to a standstill.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
04:10 IWF (Göttingen) German 1978

Einstufige Schubzentrifuge - Kuchenkalibrierung beim Trennen von Feststoff und Flüssigkeit unter verschiedenen Betriebsbedingungen

The calibration of a solid cake will be shown in a single stage pusher centrifuge at starting and under variation of the mass flow of the suspension, the frequency of the pusher and the number of revolutions. By means of a synchronization device and stroboscopical lighting the rotating barrel of the centrifuge apparently comes to a standstill.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
11:39 IWF (Göttingen) German 1978

Entwicklung von Ectocarpus siliculosus (Phaeophyta)

Vegetative Vermehrung und Generationswechsel der Braunalge unter Laborbedingungen: Bildung plurilokulärer Sporangien, Freisetzung und Keimung von Mitosporen, aufwachsende Sporophyten; Bildung unilokulärer Sporangien, Freisetzung und Keimung von Meiosporen, Bildung plurilokulärer Gametangien, Freisetzung und Kopulation von Gameten. Mikrokinematographische Aufnahmen, z. T. Zeitraffung, Schemata des Entwicklungsgangs.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
03:07 IWF (Göttingen) English 1978

Signal Recovery by Signal Averaging

Signal recognition, noise amplitude, signal to noise ration, signal averager, noise supression.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: English
06:08 IWF (Göttingen) German 1978

Entstehung und Klassifikation von Wellen

Harmonische Schwingungen. Wellenausbreitung, Sinuswelle, Frequenz, Wellenlänge, Fortpflanzungsgeschwindigkeit, Schwingungsdauer, Laufwelle, Stehwelle, ebene Welle, Kugelwelle, Transversalwelle, Longitudinalwelle, Dichtemodulation, Wellenvektor.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
04:56 IWF (Göttingen) German 1978

Keplersche Gesetze der Planetenbewegungen

Keplersche Gesetze, Planetenbahnen, Kegelschnitte, Flächensatz, Halbachsen, Umlaufzeiten, Sonnenabstände, Anfangsbedingungen. Computersimulation.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
04:58 IWF (Göttingen) English 1978

Kepler's Laws of Planetary Motion

The film demonstrates Kepler's three laws of planetary motion. In addition the first part shows that a trajectory is determined not only by the forcefield but also by the initial condition of the motion.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: English
02:28 IWF (Göttingen) Silent film 1978

Mycteria americana (Ciconiidae) - Nahrungssuche

The film shows that Wood Stork, immerses his bill in the water and without seeing, probes until he has found his prey. The water animals are driven out of hiding by means of leg movements. When the bird has captured a larger fish, he kneads this with his bill before swallowing.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
03:47 IWF (Göttingen) Silent film 1978

Pelecanus occidentalis (Pelecanidae) - Füttern der Jungen

A brown pelican regurgitates food for the young in the nest which is then swallowed by the young. Later the larger of the young reach for the food themselves from the gorge of the parent bird, whereby head and neck disappear almost completely in the parent's wide bill.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:33 IWF (Göttingen) Silent film 1978

Ardea herodias (Ardeidae) - Nahrungssuche

The film shows how motionlessly the great blue heron can stalk prey. As opposed to this the catching movement is carried out so rapidly and powerfully that the fish is speared on the bill. The fish are placed in the right position in the bill by means of jerky head movements and swallowed head first.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:59 IWF (Göttingen) Silent film 1978

Pelecanus occidentalis (Pelecanidae) - Sturztauchen

Flying brown pelicans alter their flight direction and dive with wings closed towards the surface of the water. They immerse completely, emerge again almost immediately and fly off.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:51 IWF (Göttingen) Silent film 1978

Casmerodius albus (Ardeidae) - Nahrungssuche

The film shows the motionless stalking, the careful hunt and sudden catching motion of the American Egret. The film also shows an ibis seeking food by probing the water with his bill.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
06:35 IWF (Göttingen) Silent film 1978

Eumetopias jubata (Otariidae) - Verhaltensweisen in der Kolonie

The film shows open air shots of life in the colony of the sea lion (Eumetopias jubata). The following behaviours are shown: establishing territories and rivalry fights, courting and mating, feeding the young, play among young animals.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
03:15 IWF (Göttingen) Silent film 1978

Dendrocopos major (Picidae) - Nahrungserwerb

A spotted woodpecker hammers in a "anvil" seeds open, which he collects from the ground. The woodpecker then rings a tree. In this one can see how he extracts a large larvae from the wood with the aid of his long tongue, and breaks this down and eats it. At the close the woodpecker turns his attention to a hazelnut which escapes him several times and which he catches with his front feathers.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
04:08 IWF (Göttingen) Silent film 1978

Centrocercus urophasianus (Tetraonidae) - Balz

The film contains open air shots of the courtship behaviour of the Centrocercus urophasianus. Males and females of this species do not establish a permanent relationship: a female seeks the male pairing area for pairing, who attempt to attract the females attention with a series of special movements.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:10 IWF (Göttingen) Silent film 1978

Erinaceus europaeus (Erinaceidae) - Jungentransport

The film presents a hedgehog (Erinaceus europaeus), which carries its young. After the mother has sniffed at one of her young, she grips it from its back by her mouth and carries it into another nestinghole.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:58 IWF (Göttingen) Silent film 1978

Hydranassa tricolor (Ardeidae) - Nahrungserwerb

The film shows the special hunting methods employed by the Louisiana heron, who not only lies in wait and stalks, but also drives smaller fish to the banks by means of rapid movements. With the slim bill he can grasp the tiny fish as with a pincette.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:43 IWF (Göttingen) Silent film 1978

Porphyrula martinica (Rallidae) - Nahrungssuche

The film shows that the American Purple Gallinule has, due to its long toes, taken over the leaves of water lilies as path and source of food. It does not only remove the insects from the leaves upper surface but turns the edge of the leaf with its bill holds this down with its claw and searches the under side for food.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
03:15 IWF (Göttingen) Silent film 1978

Aramus guarauna (Aramidae) - Nahrungsaufnahme

The film shows how the Limpkin searchs for snails of the species Ampullaria (Prosobranchia) in a swamp. When he touches one with his bill he carries this to dry land and without the aid of his feet, and without holding the shell fast in a hollow in the ground, the Aramus extracts the soft body with the tip of his bill. Only after he has discarded an orange coloured organ (kidney?) does he consume the snail body.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:34 IWF (Göttingen) Silent film 1978

Stercorarius parasiticus (Stercorariidae) - Verleiten

In the present film open air shots are shown of distraction manouvers in the parasite seagull. During these manouvers the birds simulate lameness and attempt with limping and fluttering to distract possible foes from the nest.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:17 IWF (Göttingen) Silent film 1978

Podilymbus podiceps (Podicipedidae) - Fressen von Fischen

The film documents the consumption of self-caught fish. Fish caught are swallowed head first.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:24 IWF (Göttingen) Silent film 1978

Sitta europaea (Sittidae) - Balz und Kopulation (Freilandaufnahmen)

Copulation of a nuthatch pair is introduced by means of ritualistic movements. Hereby the male, for the most part, with rigid body, makes pendulum movements with head and body away from the female. Copulation follows whereby the male balances by beating his wings. The procedure is repeated several times.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:44 IWF (Göttingen) Silent film 1978

Parus major (Paridae) - Drohverhalten am Nest (Freilandaufnahmen)

A squirrel approaches the nesting place of a titmouse. this at first hurries towards the squirrel and attempts to attract its attention with pendulum movements and spreading wings and at the same times to frighten off the intruder. Later the titmouse repeates her performance at the mouth of the nesting hole and then slips inside.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
Offline Collection IWF (Göttingen) Silent film 1978

Azande (Äquatorialafrika, Nordost-Zaire) - Traditionelle Behandlung einer Patientin mit einer Thoraxerkrankung

By massage and rubbing with a handful of fibrous material from the inner bark of a particular plant the practitioner "extracts" the disease from the thorax of a woman in the form of small splinters of bone. In this way he removes altogether 11 small splinters, preventing them afterwards from getting back to the woman's upper body by anointing it with healing oil. In order to detect the guilty person, i. e. the person having caused the disease by special spiritual powers and abilities, the practitioner carries out a sand-oracle, which reveals the husband's mistress as responsible for the illness.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
Offline Collection IWF (Göttingen) Silent film 1978

Azande (Äquatorialafrika, Nordost-Zaire) - Traditionelle Behandlung von Patienten mit rheumatischen Beschwerden

The practitioner chars a special kind of wood over the fire, reduces it to powder, mixes the powder on a special potsherd with healing oil, and rubs the resulting black paste into incisions cut previously with an old blade made in Europe in the patient's skin.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
11:37 IWF (Göttingen) German 1978

Untersuchung des Schwingungsverhaltens von Werkzeugmaschinen - Rechnerunterstützte Modalanalyse

A measuring procedure for analysing the dynamic behaviour of a machine tool structure is presented with the aid of an example of a vertical turning machine. The first part of the film deals with the measurement of the resonance frequencies and the compliances at the cutting point. The procedure for measuring the mode shapes using the method of computer aided Modal Analysis and the results obtained are shown in the second part of the film. Special emphasis is laid on the vibrating mode shapes displayed on CRT.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
03:06 IWF (Göttingen) German 1978

Signalextraktion durch Mittelwertbildung

Signalerkennung, Rauschamplitude, Signal-Rausch-Verhältnis, Mittelwertrechner, Rauschunterdrückung.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
11:14 IWF (Göttingen) German 1978

Entwicklung beim Seeigel (Psammechinus miliaris) - Differenzierung des Coeloms

In Schematricks und Lebendaufnahmen werden gezeigt: 1. Phasen der Coelomdifferenzierung im jungen Echinopluteus. 2. Phasen der Entwicklung der Seeigelanlage im älteren Pluteus bis zur Metamorphosereife.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
06:33 IWF (Göttingen) Silent film 1978

Basidiobolus ranarum (Entomophthoraceae) - Bildung der Zygoten

Formation of the gametangia and behaviour of the nuclei; plasmogamy and zygospore formation. Time-lapse.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
04:10 IWF (Göttingen) Silent film 1978

Basidiobolus ranarum (Entomophthoraceae) - Propagation durch Konidien

Development of the conidiophores and shooting out the conidia by means of a turgor-explosion mechanism. Mostly time-lapse.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
10:27 IWF (Göttingen) German 1978

Torsionsbeanspruchung - Inhomogenitäten bei der Verformung von Stahl, Kupfer und Aluminiumlegierungen

Demonstration verschiedener Arten inhomogener Torsionsverformung infolge von: lokaler Erwärmung, Orientierungsänderungen der Kristallite, dynamischer Reckalterung. Zusätzlich: homogene Verformung, Aufwickeln, ruckweise Verformung, Torsionsbruch.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) Silent film 1978

Azande (Äquatorialafrika, Nordost-Zaire) - Traditionelle Behandlung eines Patienten mit Leistenbruch

The practitioner extracts the oil required for the treatment from peanut butter boiled with an admixture of drugs in his medicine pot. The collecting oil is skimmed off in a half gourd, the residues are consumed by the patient. Only after this the practitioner rubs the healing oil on the large scrotal hernia.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
Offline Collection IWF (Göttingen) Silent film 1978

Azande (Äquatorialafrika, Nordost-Zaire) - Traditionelle Behandlung eines Patienten mit Kropf

After palpating the goitre the practitioner makes with an old blade made in Europe ten incisions in the skin covering the goitre. In a special potsherd he mixes healing oil with a black powder, obtained by charring and grinding a special kind of wood, and rubs the resulting thick paste thoroughly into the cuts.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: Silent film
10:28 IWF (Göttingen) English 1978

Torsional Stress - Inhomogeneous Deformation (Steel, Copper and Aluminium Alloys)

Demonstration of different kinds of inhomogeneous torsional deformation caused by: local heating, orientation changes of the crystalite, dynamic strain ageing. Also: homogeneous deformation, "curling out", jerky deformation, torsional fracture.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: English
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