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$\begin{figure} \par\includegraphics[width=7.3cm,clip]{9340f1.eps}\end{figure}$ Figure 1: Chromospheric material at 10 000-20 000 K in coronal loops observed by Hinode SOT with Ca II H emission line filter (3968.5 $\pm$ 3 Å). The material flows along the loops, which exhibit periodic oscillations (the movie of this event is available online). The oscillating loop studied is outlined with a white curve, which is obtained by tracing flows observed at 01:28:15, 01:31:10, and 01:34:40. The plasmas were ejected from the region F1 and moved along the loop to the other foot F2. Cuts 1 and 2 are used to measure the flow speeds (see Fig. 2), cut 3 is used to measure the transverse oscillations of the loop (see Fig. 3), and cuts A-C (dotted narrow boxes) are used to detect the wave propagation (see Fig. 4). This image and subsequent images are ``negative'' images, and the darkest features correspond to brightest features in SOT.
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In the text

$\begin{figure} \par\includegraphics[width=7.3cm,clip]{9340f2.eps} \end{figure}$ Figure 2: Evolution of flow emissions along the oscillating loop at cuts 1 and 2 (see Fig. 1). The flow speeds are measured by tracking the motion of some brightening features seen as dark stripes in the negative image. The positions of prominent moving features are marked and fitted linearly, yielding the apparent flow speeds which are labeled on the map. On the vertical axis, 0 corresponds to the lower end of the cut.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{9340f3.eps} \end{figure}$ Figure 3: Time series of the plasma emission in the Ca II H filter along Cut 3 across the loop top (see Fig. 1). For weak oscillatory features to be seen clearly, the image is processed by a sharpening filter. The positions of the oscillating loop are marked with ``+'' and best fitted with a damped sine function (white curve). The oscillations have a period of 113 s with weak decay.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{9340f4.eps} \end{figure}$ Figure 4: Time series of the plasma emission along cuts A-C across the loop top (see in Fig. 1). Five vertical lines across the panels mark the times when the displacement reaches the maximum or minimum in order to compare their phase relationships at the 3 cuts. On the vertical axis, 0 corresponds to the end of the cut closer to the limb. The locations of peaks and vales of threads exhibiting standing oscillations are marked with ``S'', followed by a number.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{9340f3.eps} \end{figure}$	Figure 3: Time series of the plasma emission in the Ca II H filter along Cut 3 across the loop top (see Fig. 1). For weak oscillatory features to be seen clearly, the image is processed by a sharpening filter. The positions of the oscillating loop are marked with ``+'' and best fitted with a damped sine function (white curve). The oscillations have a period of 113 s with weak decay.
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